MySQL Fast Networking Library - INSERT SELECT SHOW
In this tutorial we want to explore several beginner friendly fast Networking Library examples with MySQL database and several adapterveiws. These adapterviews include gridview and listview.
Here's what you will learn:
- How to insert data from edittext, checkbox and spinner to mysql database from an android app,
- How to select data from mysql database and show in gridview or listview .
We will cover these using full examples.
Example 1: Android MySQL – Insert From EditText,CheckBox,Spinner
Android PHP MySQL tutorial. How to Insert to MySQL From Editext, CheckBox and Spinner, then Select and show in ListView.
Today we want to explore how to save several data types into MySQL database from our android application.We want to save boolean and strings to mysql database.The components acting as our input views include edittext,spinner and checkbox .We have a fictional spacecraft with a String property name,String property propellant as well as boolean/integer property 'does technology exist';
What we do :
- User types into EditText,Selects from spinner and checks/unchecks the checkbox.
- We fetch this data and make a HTTP POST request to the server.
- Our MySQL database is hosted locally in localhost.
- The request happens in the background thread.
- We are returned a response depending on the success or failure of the operation.
- If successfull we reset our input views.
- We are using Android Networking library by Amit Shekhar.
Common Questions we answer :
- Save Boolean to MySQL database.
- Save Integers or String to MySQL database.
- Map Boolean to Integers.
- Save From Android to MySQL.
- HTTP POST method.
- Background thread Android Networking.
- Save.Insert from spinner,from checkbox,from editext.
- PHP MySQL JSON Android.
- Object Oriented PHP MySQL database.
What You'll do :
- Create a project in android studio.
- Give it a name and choose minimum and target SDKs.
- Add permission for internet connection in your android manifest.
- Add a dependency statement for a networking library we'll use.
- Create a MySQL table and write some PHP code.
- Run your project.
- I tested mine in bluestacks emulator.
Overview :
Classes
- MainActivity class
- Spacecraft class
- MySQLClient class.
Layouts
- ActivityMain.xml
- ContentMain.xml
AndroidManifest.xml
- Add Permission for Internet
Here is the code:
This is the part 2 of android php mysql series. How to insert, select and retrieve both boolean and text values to and from mysql database.
SECTION 1 : Our Dependencies and Manifest.xml
Build.Gradle
- Android Studio has added for us dependencies for AppCompat and Design support libraries.
- Note we are subclassing AppCompatActivity to make our MainActivity class an activity.
- We are using Android Networking library so we need to fetch it from the jcenter.
- Add the it in your build.gradle.
apply plugin: 'com.android.application'
android {
compileSdkVersion 24
buildToolsVersion "24.0.1"
defaultConfig {
applicationId "com.tutorials.hp.mysql_datatypes_save"
minSdkVersion 15
targetSdkVersion 24
versionCode 1
versionName "1.0"
}
buildTypes {
release {
minifyEnabled false
proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
}
}
}
dependencies {
compile fileTree(dir: 'libs', include: ['*.jar'])
testCompile 'junit:junit:4.12'
compile 'com.android.support:appcompat-v7:24.2.0'
compile 'com.android.support:design:24.2.0'
compile 'com.amitshekhar.android:android-networking:0.2.0'
}
AndroidManifest.xml
- Add Pernmission for making internet connection as we have added below in our manifest.
<?xml version="1.0" encoding="utf-8"?>
<manifest
package="com.tutorials.hp.mysql_datatypes_save">
<uses-permission android_name="android.permission.INTERNET"/>
<application
android_allowBackup="true"
android_icon="@mipmap/ic_launcher"
android_label="@string/app_name"
android_supportsRtl="true"
android_theme="@style/AppTheme">
<activity
android_name=".MainActivity"
android_label="@string/app_name"
android_theme="@style/AppTheme.NoActionBar">
<intent-filter>
<action android_name="android.intent.action.MAIN" />
<category android_name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
</application>
</manifest>
Our Layouts
ActivityMain.xml Layout.
- Inflated as our activity's view.
- Includes our content main layout.
- Contains support.v4 widgets like Cordinatorlayout, appbarlayout, toolbar and our floating action button view.
<?xml version="1.0" encoding="utf-8"?>
<android.support.design.widget.CoordinatorLayout
android_layout_width="match_parent"
android_layout_height="match_parent"
android_fitsSystemWindows="true"
tools_context="com.tutorials.hp.mysql_datatypes_save.MainActivity">
<android.support.design.widget.AppBarLayout
android_layout_width="match_parent"
android_layout_height="wrap_content"
android_theme="@style/AppTheme.AppBarOverlay">
<android.support.v7.widget.Toolbar
android_id="@+id/toolbar"
android_layout_width="match_parent"
android_layout_height="?attr/actionBarSize"
android_background="?attr/colorPrimary"
app_popupTheme="@style/AppTheme.PopupOverlay" />
</android.support.design.widget.AppBarLayout>
<include layout="@layout/content_main" />
<android.support.design.widget.FloatingActionButton
android_id="@+id/fab"
android_layout_width="wrap_content"
android_layout_height="wrap_content"
android_layout_gravity="bottom|end"
android_layout_margin="@dimen/fab_margin"
android_src="@android:drawable/ic_dialog_email" />
</android.support.design.widget.CoordinatorLayout>
ContentMain.xml Layout.
- Lets all our spinner,editexts and checkbox as well as buttons here.
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout
android_layout_width="match_parent"
android_layout_height="match_parent"
android_paddingBottom="@dimen/activity_vertical_margin"
android_paddingLeft="@dimen/activity_horizontal_margin"
android_paddingRight="@dimen/activity_horizontal_margin"
android_paddingTop="@dimen/activity_vertical_margin"
app_layout_behavior="@string/appbar_scrolling_view_behavior"
tools_context="com.tutorials.hp.mysql_datatypes_save.MainActivity"
tools_showIn="@layout/activity_main">
<LinearLayout
android_orientation="vertical"
android_layout_width="match_parent"
android_layout_height="wrap_content">
<android.support.design.widget.TextInputEditText
android_id="@+id/nameTxt"
android_hint="Name"
android_layout_width="match_parent"
android_layout_height="wrap_content"
android_textStyle="bold"
android_textSize="25dp"
android_enabled="true"
android_focusable="true" />
<LinearLayout
android_orientation="horizontal"
android_padding="5dp"
android_layout_width="match_parent"
android_layout_height="wrap_content">
<TextView
android_textSize="25dp"
android_text="Propellant"
android_textStyle="bold"
android_layout_width="250dp"
android_layout_height="wrap_content" />
<Spinner
android_id="@+id/sp"
android_textSize="25dp"
android_textStyle="bold"
android_layout_width="wrap_content"
android_layout_height="wrap_content" />
</LinearLayout>
<LinearLayout
android_orientation="horizontal"
android_padding="5dp"
android_layout_width="match_parent"
android_layout_height="wrap_content">
<TextView
android_textSize="25dp"
android_text="Technology Exists ??"
android:textStyle="bold"
android:layout_width="250dp"
android:layout_height="wrap_content" />
<CheckBox
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textSize="25dp"
android:id="@+id/techExists"
android:checked="true" />
</LinearLayout>
<RelativeLayout
android:orientation="horizontal"
android:layout_width="match_parent"
android:layout_height="wrap_content">
<Button android:id="@+id/addBtn"
android:layout_width="wrap_content"
android:layout_height="60dp"
android:text="Save"
android:clickable="true"
android:padding="5dp"
android:background="#009968"
android:textColor="@android:color/white"
android:textStyle="bold"
android:textSize="20dp" />
</RelativeLayout>
</LinearLayout>
</RelativeLayout>
SECTION 2 : Data Model
Spacecraft class.
Main Responsibility : HOLD INFORMATION OF A SINGLE SPACECRAFT
- Is our data object.
- Shall contain properties for a spacecraft.
- Exposes these through public getters and setters.
package com.tutorials.hp.mysql_datatypes_save;
public class Spacecraft {
/*
INSTANCE FIELDS
*/
private int id;
private String name;
private String propellant;
private int technologyExists;
/*
GETTERS AND SETTERS
*/
public int getId() {
return id;
}
public void setId(int id) {
this.id = id;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String getPropellant() {
return propellant;
}
public void setPropellant(String propellant) {
this.propellant = propellant;
}
public int getTechnologyExists() {
return technologyExists;
}
public void setTechnologyExists(int technologyExists) {
this.technologyExists = technologyExists;
}
/*
TOSTRING
*/
@Override
public String toString() {
return name;
}
}
SECTION 3 : HTTP Client
MySQL Client class.
Main Responsibility : TALKS TO OUR MYSQL VIA PHP
- Is our http client class.
- Shall make HTTP POST Requests.
- We shall attach the data from our views as body parameters to be sent to the server.
- Once we send data,we receive a response in terms of json array if success or error.
- Also specifies a static constant which is our api url.
package com.tutorials.hp.mysql_datatypes_save;
import android.content.Context;
import android.view.View;
import android.widget.ArrayAdapter;
import android.widget.EditText;
import android.widget.Spinner;
import android.widget.Toast;
import com.androidnetworking.AndroidNetworking;
import com.androidnetworking.common.Priority;
import com.androidnetworking.error.ANError;
import com.androidnetworking.interfaces.JSONArrayRequestListener;
import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;
import java.util.ArrayList;
public class MySQLClient {
//SAVE/RETRIEVE URLS
private static final String DATA_INSERT_URL="http://10.0.2.2/android/Columbia/crud.php";
//INSTANCE FIELDS
private final Context c;
public MySQLClient(Context c) {
this.c = c;
}
/*
SAVE/INSERT
*/
public void add(Spacecraft s, final View...inputViews)
{
if(s==null)
{
Toast.makeText(c, "No Data To Save", Toast.LENGTH_SHORT).show();
}
else
{
AndroidNetworking.post(DATA_INSERT_URL)
.addBodyParameter("action","save")
.addBodyParameter("name",s.getName())
.addBodyParameter("propellant",s.getPropellant())
.addBodyParameter("technologyexists",String.valueOf(s.getTechnologyExists()))
.setTag("TAG_ADD")
.build()
.getAsJSONArray(new JSONArrayRequestListener() {
@Override
public void onResponse(JSONArray response) {
if(response != null)
try {
//SHOW RESPONSE FROM SERVER
String responseString = response.get(0).toString();
Toast.makeText(c, "PHP SERVER RESPONSE : " + responseString, Toast.LENGTH_SHORT).show();
if (responseString.equalsIgnoreCase("Success")) {
//RESET VIEWS
EditText nameTxt = (EditText) inputViews[0];
Spinner spPropellant = (Spinner) inputViews[1];
nameTxt.setText("");
spPropellant.setSelection(0);
}else
{
Toast.makeText(c, "PHP WASN'T SUCCESSFUL. ", Toast.LENGTH_SHORT).show();
}
} catch (JSONException e) {
e.printStackTrace();
Toast.makeText(c, "GOOD RESPONSE BUT JAVA CAN'T PARSE JSON IT RECEIVED : "+e.getMessage(), Toast.LENGTH_SHORT).show();
}
}
//ERROR
@Override
public void onError(ANError anError) {
Toast.makeText(c, "UNSUCCESSFUL : ERROR IS : "+anError.getMessage(), Toast.LENGTH_SHORT).show();
}
});
}
}
}
SECTION 4 : Our Activity
MainActivity class.
Main Responsibility : LAUNCH OUR APP.
- It extends AppcompatActivity hence is an activity.
- Activities are the entry point of android applications.This is no exception.
- It loads our activity layout.
- It handles all our inputs in this case.
- Add references to Spinner,EditText and CheckBox.
- Also add buttons and initialize them.
package com.tutorials.hp.mysql_datatypes_save;
import android.os.Bundle;
import android.support.design.widget.FloatingActionButton;
import android.support.design.widget.Snackbar;
import android.support.design.widget.TextInputEditText;
import android.support.v7.app.AppCompatActivity;
import android.support.v7.widget.Toolbar;
import android.view.View;
import android.widget.ArrayAdapter;
import android.widget.Button;
import android.widget.CheckBox;
import android.widget.Spinner;
import android.widget.Toast;
public class MainActivity extends AppCompatActivity {
//INSTANCE FIELDS
private TextInputEditText txtName;
private CheckBox chkTechnologyExists;
private Spinner spPropellant;
private Button btnAdd;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
setSupportActionBar(toolbar);
FloatingActionButton fab = (FloatingActionButton) findViewById(R.id.fab);
fab.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
Snackbar.make(view, "Replace with your own action", Snackbar.LENGTH_LONG)
.setAction("Action", null).show();
}
});
//REFERENCE VIEWS
this.initializeViews();
populatePropellants();
//HANDLE EVENTS
this.handleClickEvents();
}
/*
REFERENCE VIEWS
*/
private void initializeViews()
{
txtName= (TextInputEditText) findViewById(R.id.nameTxt);
chkTechnologyExists= (CheckBox) findViewById(R.id.techExists);
spPropellant= (Spinner) findViewById(R.id.sp);
btnAdd= (Button) findViewById(R.id.addBtn);
}
/*
HANDLE CLICK EVENTS
*/
private void handleClickEvents()
{
//EVENTS : ADD
btnAdd.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
//GET VALUES
String name=txtName.getText().toString();
String propellant=spPropellant.getSelectedItem().toString();
Boolean technologyexists=chkTechnologyExists.isChecked();
//BASIC CLIENT SIDE VALIDATION
if((name.length()<1 || propellant.length()<1 ))
{
Toast.makeText(MainActivity.this, "Please Enter all Fields", Toast.LENGTH_SHORT).show();
}
else
{
//SAVE
Spacecraft s=new Spacecraft();
s.setName(name);
s.setPropellant(propellant);
s.setTechnologyExists(technologyexists ? 1 : 0);
new MySQLClient(MainActivity.this).add(s,txtName,spPropellant);
}
}
});
}
private void populatePropellants()
{
ArrayAdapter<String> adapter=new ArrayAdapter<String>(this,android.R.layout.simple_spinner_dropdown_item);
adapter.add("None");
adapter.add("Chemical Energy");
adapter.add("Nuclear Energy");
adapter.add("Laser Beam");
adapter.add("Anti-Matter");
adapter.add("Plasma Ions");
adapter.add("Warp Drive");
spPropellant.setAdapter(adapter);
spPropellant.setSelection(0);
}
}
PHP Code
Constants.php Class
- Holds the database constants like database name,database password and host.
- We also define our select statement here.
<?php
class Constants
{
//DATABASE DETAILS
static $DB_SERVER="localhost";
static $DB_NAME="galileoDB";
static $USERNAME="root";
static $PASSWORD="";
const TB_NAME="galileoTB";
//STATEMENTS
static $SQL_SELECT_ALL="SELECT * FROM galileoTB";
}
DBAdapter Class
- Performs all CRUD operations.
- Inserts data to MySQL Database.
<?php
require_once("/Constants.php");
class DBAdapter
{
/*******************************************************************************************************************************************/
/*
1.CONNECT TO DATABASE.
2. RETURN CONNECTION OBJECT
*/
public function connect()
{
$con=mysqli_connect(Constants::$DB_SERVER,Constants::$USERNAME,Constants::$PASSWORD,Constants::$DB_NAME);
if(mysqli_connect_error(!$con))
{
// echo "Unable To Connect";
return null;
}else
{
return $con;
}
}
/*******************************************************************************************************************************************/
/*
1.INSERT SPACECRAFT INTO DATABASE
*/
public function insert($s)
{
// INSERT
$con=$this->connect();
if($con != null)
{
$sql="INSERT INTO galileoTB(name,propellant,technologyexists) VALUES('$s[0]','$s[1]','$s[2]')";
try
{
$result=mysqli_query($con,$sql);
if($result)
{
print(json_encode(array("Success")));
}else
{
print(json_encode(array("Unsuccessfull")));
}
}catch (Exception $e)
{
print(json_encode(array("PHP EXCEPTION : CAN'T SAVE TO MYSQL. "+$e->getMessage())));
}
}else{
print(json_encode(array("PHP EXCEPTION : CAN'T CONNECT TO MYSQL. NULL CONNECTION.")));
}
mysqli_close($con);
}
/*******************************************************************************************************************************************/
/*
1.SELECT FROM DATABASE.
*/
public function select()
{
$con=$this->connect();
if($con != null)
{
$retrieved=mysqli_query($con,Constants::$SQL_SELECT_ALL);
if($retrieved)
{
while($row=mysqli_fetch_array($retrieved))
{
// echo $row["name"] ," t | ",$row["propellant"],"</br>";
$spacecrafts[]=$row;
}
print(json_encode($spacecrafts));
}else
{
print(json_encode(array("PHP EXCEPTION : CAN'T RETRIEVE FROM MYSQL. ")));
}
}else{
print(json_encode(array("PHP EXCEPTION : CAN'T CONNECT TO MYSQL. NULL CONNECTION.")));
}
mysqli_close($con);
}
/*******************************************************************************************************************************************/
/*
1.UPDATE DATABASE.
*/
public function update($id, $s)
{
// UPDATE
$con=$this->connect();
if($con != null)
{
$sql="UPDATE galileoTB SET name='$s[0]',propellant='$s[1]',technologyexists='$s[2]' WHERE id='$id'";
try
{
$result=mysqli_query($con,$sql);
if($result)
{
print(json_encode(array("Successfully Updated")));
}else
{
print(json_encode(array("Not Successfully Updated")));
}
}catch (Exception $e)
{
print(json_encode(array("PHP EXCEPTION : CAN'T UPDATE INTO MYSQL. "+$e->getMessage())));
}
}else{
print(json_encode(array("PHP EXCEPTION : CAN'T CONNECT TO MYSQL. NULL CONNECTION.")));
}
mysqli_close($con);
}
/*******************************************************************************************************************************************/
/*
1.DELETE SPACECRAFT FROM DATABASE.
*/
public function delete($id)
{
$con=$this->connect();
if($con != null)
{
// $name=$_POST['Name'];
// $pos=$_POST['Position'];
// $team=$_POST['Team'];
$sql="DELETE FROM galileoTB WHERE id='$id'";
try
{
$result=mysqli_query($con,$sql);
if($result)
{
print(json_encode(array("Successfully Deleted")));
}else
{
print(json_encode(array("Not Successfully Deleted")));
}
}catch (Exception $e)
{
print(json_encode(array("PHP EXCEPTION : CAN'T DELETE FROM MYSQL. "+$e->getMessage())));
}
}else{
print(json_encode(array("PHP EXCEPTION : CAN'T CONNECT TO MYSQL. NULL CONNECTION.")));
}
mysqli_close($con);
}
}
p
CRUD.php Class
- Receives the HTTP request from the client,in this case android.
- It then determines the action to take,whether to call save method or whatever.
<?php
require_once("/DBAdapter.php");
if($_POST['action']=="save"){
$dbAdapter=new DBAdapter();
$name=$_POST['name'];
$propellant=$_POST['propellant'];
$technologyexists=$_POST['technologyexists'];
$dbAdapter->insert(array($name,$propellant,$technologyexists));
}
else if($_POST['action']=="update")
{
$dbAdapter=new DBAdapter();
$id=$_POST['id'];
$name=$_POST['name'];
$propellant=$_POST['propellant'];
$technologyexists=$_POST['technologyexists'];
$dbAdapter->update($id,array($name,$propellant,$technologyexists));
}
else if($_POST['action']=="delete")
{
$dbAdapter=new DBAdapter();
$id=$_POST['id'];
$dbAdapter->delete($id);
}
?>
Index.php File
- Executes the retrieve/select function to retrieve data from database.
Download
Example 2: Android MySQL – GridView CheckBox – INSERT,SELECT,SHOW
This is an android mysql gridview with checkboxes tutorial. We see how to insert, select and show in a gridview.
- Look the aim is to see how to work with Boolean values with MySQL database.
- We want to insert data to MySQL database first.
- We are inserting from an edittext,from a spinner as well as from a checkbox.
- The user checks/unchecks the checkbox if the technology for our fictional spacecraft exists.
- He selects the propellant from a spinner and enters the spacecraft name in a material checkbox.
- We then select our data from database.It is strings and booleans.
- The gridview is custom to hold textviews and checkboxes.
- In actuality,MySQL doesn't natively support boolean data types.So we shall use a simple integer to represent boolean values to be bound to checkbox.
- 1 to represent true and 0 to false.The integer is nullable.
Video Tutorial(ProgrammingWizards TV Channel)
Well we have a video tutorial as an alternative to this. If you prefer tutorials like this one then it would be good you subscribe to our YouTube channel.
Basically we have a TV for programming where do daily tutorials especially android.
Android MySQL GridView CheckBoxes Insert, Select Show Example
Let's look at our example:
MySQL Table
Here's our mysql table structure:
Project Structure
Here's our project structure.
1. PHP Code
Here are our php code. Place them in the same folder.
(a) Constants.php
<?php
class Constants
{
//DATABASE DETAILS
static $DB_SERVER="localhost";
static $DB_NAME="galileoDB";
static $USERNAME="root";
static $PASSWORD="";
const TB_NAME="galileoTB";
//STATEMENTS
static $SQL_SELECT_ALL="SELECT * FROM galileoTB";
}
(b) CRUD.php
<?php
require_once("/DBAdapter.php");
if($_POST['action']=="save"){
$dbAdapter=new DBAdapter();
$name=$_POST['name'];
$propellant=$_POST['propellant'];
$technologyexists=$_POST['technologyexists'];
$dbAdapter->insert(array($name,$propellant,$technologyexists));
}
else if($_POST['action']=="update")
{
$dbAdapter=new DBAdapter();
$id=$_POST['id'];
$name=$_POST['name'];
$propellant=$_POST['propellant'];
$technologyexists=$_POST['technologyexists'];
$dbAdapter->update($id,array($name,$propellant,$technologyexists));
}
else if($_POST['action']=="delete")
{
$dbAdapter=new DBAdapter();
$id=$_POST['id'];
$dbAdapter->delete($id);
}
?>
(c) DBAdapter.php
<?php
require_once("/Constants.php");
class DBAdapter
{
/*******************************************************************************************************************************************/
/*
1.CONNECT TO DATABASE.
2. RETURN CONNECTION OBJECT
*/
public function connect()
{
$con=mysqli_connect(Constants::$DB_SERVER,Constants::$USERNAME,Constants::$PASSWORD,Constants::$DB_NAME);
if(mysqli_connect_error(!$con))
{
// echo "Unable To Connect";
return null;
}else
{
return $con;
}
}
/*******************************************************************************************************************************************/
/*
1.INSERT SPACECRAFT INTO DATABASE
*/
public function insert($s)
{
// INSERT
$con=$this->connect();
if($con != null)
{
$sql="INSERT INTO galileoTB(name,propellant,technologyexists) VALUES('$s[0]','$s[1]','$s[2]')";
try
{
$result=mysqli_query($con,$sql);
if($result)
{
print(json_encode(array("Success")));
}else
{
print(json_encode(array("Unsuccessfull")));
}
}catch (Exception $e)
{
print(json_encode(array("PHP EXCEPTION : CAN'T SAVE TO MYSQL. "+$e->getMessage())));
}
}else{
print(json_encode(array("PHP EXCEPTION : CAN'T CONNECT TO MYSQL. NULL CONNECTION.")));
}
mysqli_close($con);
}
/*******************************************************************************************************************************************/
/*
1.SELECT FROM DATABASE.
*/
public function select()
{
$con=$this->connect();
if($con != null)
{
$retrieved=mysqli_query($con,Constants::$SQL_SELECT_ALL);
if($retrieved)
{
while($row=mysqli_fetch_array($retrieved))
{
// echo $row["name"] ," t | ",$row["propellant"],"</br>";
$spacecrafts[]=$row;
}
print(json_encode($spacecrafts));
}else
{
print(json_encode(array("PHP EXCEPTION : CAN'T RETRIEVE FROM MYSQL. ")));
}
}else{
print(json_encode(array("PHP EXCEPTION : CAN'T CONNECT TO MYSQL. NULL CONNECTION.")));
}
mysqli_close($con);
}
/*******************************************************************************************************************************************/
/*
1.UPDATE DATABASE.
*/
public function update($id, $s)
{
// UPDATE
$con=$this->connect();
if($con != null)
{
$sql="UPDATE galileoTB SET name='$s[0]',propellant='$s[1]',technologyexists='$s[2]' WHERE id='$id'";
try
{
$result=mysqli_query($con,$sql);
if($result)
{
print(json_encode(array("Successfully Updated")));
}else
{
print(json_encode(array("Not Successfully Updated")));
}
}catch (Exception $e)
{
print(json_encode(array("PHP EXCEPTION : CAN'T UPDATE INTO MYSQL. "+$e->getMessage())));
}
}else{
print(json_encode(array("PHP EXCEPTION : CAN'T CONNECT TO MYSQL. NULL CONNECTION.")));
}
mysqli_close($con);
}
/*******************************************************************************************************************************************/
/*
1.DELETE SPACECRAFT FROM DATABASE.
*/
public function delete($id)
{
$con=$this->connect();
if($con != null)
{
// $name=$_POST['Name'];
// $pos=$_POST['Position'];
// $team=$_POST['Team'];
$sql="DELETE FROM galileoTB WHERE id='$id'";
try
{
$result=mysqli_query($con,$sql);
if($result)
{
print(json_encode(array("Successfully Deleted")));
}else
{
print(json_encode(array("Not Successfully Deleted")));
}
}catch (Exception $e)
{
print(json_encode(array("PHP EXCEPTION : CAN'T DELETE FROM MYSQL. "+$e->getMessage())));
}
}else{
print(json_encode(array("PHP EXCEPTION : CAN'T CONNECT TO MYSQL. NULL CONNECTION.")));
}
mysqli_close($con);
}
}
(d) Index.php
2. Gradle Scripts
Here are our gradle scripts in our build.gradle file(s).
(a). build.gradle(app)
Here's our app level build.gradle file. We have the dependencies DSL where we add our dependencies.
This file is called app level build.gradle since it's located in the app folder of the project.
If you are using Android Studio version 3 and above use implementation keyword while if you are using a version less than 3 then still use the compile keyword.
Once you've modified this build.gradle file you have to sync your project. Android Studio will indeed prompt you to do so.
dependencies {
compile fileTree(dir: 'libs', include: ['*.jar'])
testCompile 'junit:junit:4.12'
compile 'com.android.support:appcompat-v7:24.2.0'
compile 'com.android.support:design:24.2.0'
compile 'com.android.support:cardview-v7:24.2.0'
compile 'com.amitshekhar.android:android-networking:0.2.0'
}
[notice] We are using Fast Android Networking Library as our HTTP Client. You may use newer versions. [/notice]
3. Resoources.
Android platform provides a powerful and flexible way of adding static content as a resource.
These static content will also be packaged into the APK file. The static content will be stored either as a resource or as an asset.
Resources belong to a given type. These types can be:
- Drawable.
- Layout.
- Value.
Let's start by looking at the layout resources
(a). model.xml
Our row model layout.
<?xml version="1.0" encoding="utf-8"?>
<android.support.v7.widget.CardView
android_orientation="horizontal" android_layout_width="match_parent"
android_layout_margin="10dp"
card_view_cardCornerRadius="5dp"
card_view_cardElevation="5dp"
android_layout_height="200dp">
<LinearLayout
android_orientation="vertical"
android_layout_width="match_parent"
android_layout_height="match_parent">
<TextView
android_layout_width="match_parent"
android_layout_height="wrap_content"
android_textAppearance="?android:attr/textAppearanceLarge"
android_text="Name"
android_id="@+id/nameTxt"
android_padding="10dp"
android_textColor="@color/colorAccent"
android_textStyle="bold"
android_layout_alignParentLeft="true"
/>
<TextView
android_layout_width="wrap_content"
android_layout_height="wrap_content"
android_textAppearance="?android:attr/textAppearanceLarge"
android_text="Propellant....................."
android_id="@+id/txtPropellant"
android_padding="10dp"
android_layout_alignParentLeft="true"
/>
<CheckBox
android_layout_width="wrap_content"
android_layout_height="wrap_content"
android_textSize="25dp"
android_id="@+id/chkTechExists"
android_checked="true" />
</LinearLayout>
</android.support.v7.widget.CardView>
(b). content_main.xml
Our content_main layout. This layout is being inserted into our activity_main.xml.
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout
android_layout_width="match_parent"
android_layout_height="match_parent"
android_paddingBottom="@dimen/activity_vertical_margin"
android_paddingLeft="@dimen/activity_horizontal_margin"
android_paddingRight="@dimen/activity_horizontal_margin"
android_paddingTop="@dimen/activity_vertical_margin"
app_layout_behavior="@string/appbar_scrolling_view_behavior"
tools_context="com.tutorials.hp.mysqlgridviewbool.MainActivity"
tools_showIn="@layout/activity_main">
<LinearLayout
android_orientation="vertical"
android_layout_width="match_parent"
android_layout_height="wrap_content">
<android.support.design.widget.TextInputEditText
android_id="@+id/nameTxt"
android_hint="Name"
android_layout_width="match_parent"
android_layout_height="wrap_content"
android_textStyle="bold"
android_textSize="25dp"
android_enabled="true"
android_focusable="true" />
<LinearLayout
android_orientation="horizontal"
android_padding="5dp"
android_layout_width="match_parent"
android_layout_height="wrap_content">
<TextView
android_textSize="25dp"
android_text="Propellant"
android_textStyle="bold"
android_layout_width="250dp"
android_layout_height="wrap_content" />
<Spinner
android_id="@+id/sp"
android_textSize="25dp"
android_textStyle="bold"
android_layout_width="wrap_content"
android_layout_height="wrap_content" />
</LinearLayout>
<LinearLayout
android_orientation="horizontal"
android_padding="5dp"
android_layout_width="match_parent"
android_layout_height="wrap_content">
<TextView
android_textSize="25dp"
android_text="Technology Exists ??"
android_textStyle="bold"
android_layout_width="250dp"
android_layout_height="wrap_content" />
<CheckBox
android_layout_width="wrap_content"
android_layout_height="wrap_content"
android_textSize="25dp"
android_id="@+id/techExists"
android_checked="true" />
</LinearLayout>
<RelativeLayout
android_orientation="horizontal"
android_layout_width="match_parent"
android_layout_height="wrap_content">
<Button android_id="@+id/addBtn"
android_layout_width="wrap_content"
android_layout_height="60dp"
android_text="Save"
android_clickable="true"
android_padding="5dp"
android_background="#009968"
android_textColor="@android:color/white"
android_textStyle="bold"
android_textSize="20dp" />
<Button android_id="@+id/refreshBtn"
android_layout_width="wrap_content"
android_layout_height="60dp"
android_text="Retrieve"
android_padding="5dp"
android_clickable="true"
android_background="#f38630"
android_textColor="@android:color/white"
android_layout_alignParentTop="true"
android_layout_alignParentRight="true"
android_layout_alignParentEnd="true"
android_textStyle="bold"
android_textSize="20dp" />
</RelativeLayout>
<GridView
android_id="@+id/gv"
android_numColumns="2"
android_layout_width="match_parent"
android_layout_height="wrap_content">
</GridView>
</LinearLayout>
</RelativeLayout>
(c). activity_main.xml
This is the layout for our MainActivity class.
<?xml version="1.0" encoding="utf-8"?>
<android.support.design.widget.CoordinatorLayout
android_layout_width="match_parent"
android_layout_height="match_parent"
android_fitsSystemWindows="true"
tools_context="com.tutorials.hp.mysqlgridviewbool.MainActivity">
<android.support.design.widget.AppBarLayout
android_layout_width="match_parent"
android_layout_height="wrap_content"
android_theme="@style/AppTheme.AppBarOverlay">
<android.support.v7.widget.Toolbar
android_id="@+id/toolbar"
android_layout_width="match_parent"
android_layout_height="?attr/actionBarSize"
android_background="?attr/colorPrimary"
app_popupTheme="@style/AppTheme.PopupOverlay" />
</android.support.design.widget.AppBarLayout>
<include layout="@layout/content_main" />
<android.support.design.widget.FloatingActionButton
android_id="@+id/fab"
android_layout_width="wrap_content"
android_layout_height="wrap_content"
android_layout_gravity="bottom|end"
android_layout_margin="@dimen/fab_margin"
android_src="@android:drawable/ic_dialog_email" />
</android.support.design.widget.CoordinatorLayout>
(a) Spacecraft.java
Our data object.
package com.tutorials.hp.mysqlgridviewbool.mModel;
public class Spacecraft {
/*
INSTANCE FIELDS
*/
private int id;
private String name;
private String propellant;
private int technologyExists;
/*
GETTERS AND SETTERS
*/
public int getId() {
return id;
}
public void setId(int id) {
this.id = id;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String getPropellant() {
return propellant;
}
public void setPropellant(String propellant) {
this.propellant = propellant;
}
public int getTechnologyExists() {
return technologyExists;
}
public void setTechnologyExists(int technologyExists) {
this.technologyExists = technologyExists;
}
/*
TOSTRING
*/
@Override
public String toString() {
return name;
}
}
(b) MySQLClient.java
We are using Android Networking Library by Ahmed Shekhar to perform our network calls.These shall happen in the background thread and return us responses in JSON format.The library is fast and easy to use.
First take note that the full source code reference is above,download it including the PHP we used. Here's our MySQL client class,our most important class.
package com.tutorials.hp.mysqlgridviewbool.mMySQL;
import android.content.Context;
import android.view.View;
import android.widget.ArrayAdapter;
import android.widget.EditText;
import android.widget.GridView;
import android.widget.Spinner;
import android.widget.Toast;
import com.androidnetworking.AndroidNetworking;
import com.androidnetworking.common.Priority;
import com.androidnetworking.error.ANError;
import com.androidnetworking.interfaces.JSONArrayRequestListener;
import com.tutorials.hp.mysqlgridviewbool.mAdapter.GridViewAdapter;
import com.tutorials.hp.mysqlgridviewbool.mModel.Spacecraft;
import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;
import java.util.ArrayList;
public class MySQLClient {
//SAVE/RETRIEVE URLS
private static final String DATA_INSERT_URL="http://10.0.2.2/android/Aristotle/crud.php";
private static final String DATA_RETRIEVE_URL="http://10.0.2.2/android/Aristotle/index.php";
//INSTANCE FIELDS
private final Context c;
private GridViewAdapter adapter ;
public MySQLClient(Context c) {
this.c = c;
}
/*
SAVE/INSERT
*/
public void add(Spacecraft s, final View...inputViews)
{
if(s==null)
{
Toast.makeText(c, "No Data To Save", Toast.LENGTH_SHORT).show();
}
else
{
AndroidNetworking.post(DATA_INSERT_URL)
.addBodyParameter("action","save")
.addBodyParameter("name",s.getName())
.addBodyParameter("propellant",s.getPropellant())
.addBodyParameter("technologyexists",String.valueOf(s.getTechnologyExists()))
.setTag("TAG_ADD")
.build()
.getAsJSONArray(new JSONArrayRequestListener() {
@Override
public void onResponse(JSONArray response) {
if(response != null)
try {
//SHOW RESPONSE FROM SERVER
String responseString = response.get(0).toString();
Toast.makeText(c, "PHP SERVER RESPONSE : " + responseString, Toast.LENGTH_SHORT).show();
if (responseString.equalsIgnoreCase("Success")) {
//RESET VIEWS
EditText nameTxt = (EditText) inputViews[0];
Spinner spPropellant = (Spinner) inputViews[1];
nameTxt.setText("");
spPropellant.setSelection(0);
}else
{
Toast.makeText(c, "PHP WASN'T SUCCESSFUL. ", Toast.LENGTH_SHORT).show();
}
} catch (JSONException e) {
e.printStackTrace();
Toast.makeText(c, "GOOD RESPONSE BUT JAVA CAN'T PARSE JSON IT RECEIVED : "+e.getMessage(), Toast.LENGTH_SHORT).show();
}
}
//ERROR
@Override
public void onError(ANError anError) {
Toast.makeText(c, "UNSUCCESSFUL : ERROR IS : "+anError.getMessage(), Toast.LENGTH_SHORT).show();
}
});
}
}
/*
RETRIEVE/SELECT/REFRESH
*/
public void retrieve(final GridView gv)
{
final ArrayList<Spacecraft> spacecrafts = new ArrayList<>();
AndroidNetworking.get(DATA_RETRIEVE_URL)
.setPriority(Priority.HIGH)
.build()
.getAsJSONArray(new JSONArrayRequestListener() {
@Override
public void onResponse(JSONArray response) {
JSONObject jo;
Spacecraft s;
try
{
for(int i=0;i<response.length();i++)
{
jo=response.getJSONObject(i);
int id=jo.getInt("id");
String name=jo.getString("name");
String propellant=jo.getString("propellant");
String techExists=jo.getString("technologyexists");
s=new Spacecraft();
s.setId(id);
s.setName(name);
s.setPropellant(propellant);
s.setTechnologyExists(techExists.equalsIgnoreCase("1") ? 1 : 0);
spacecrafts.add(s);
}
//SET TO SPINNER
adapter =new GridViewAdapter(c,spacecrafts);
gv.setAdapter(adapter);
}catch (JSONException e)
{
Toast.makeText(c, "GOOD RESPONSE BUT JAVA CAN'T PARSE JSON IT RECEIEVED. "+e.getMessage(), Toast.LENGTH_LONG).show();
}
}
//ERROR
@Override
public void onError(ANError anError) {
anError.printStackTrace();
Toast.makeText(c, "UNSUCCESSFUL : ERROR IS : "+anError.getMessage(), Toast.LENGTH_LONG).show();
}
});
}
}
(c). GridViewAdapter.java
Here's our GridView adapter class.The base class we are deriving from is baseadapter of course.We map our integers to boolean.
package com.tutorials.hp.mysqlgridviewbool.mAdapter;
import android.content.Context;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.CheckBox;
import android.widget.TextView;
import android.widget.Toast;
import com.tutorials.hp.mysqlgridviewbool.R;
import com.tutorials.hp.mysqlgridviewbool.mModel.Spacecraft;
import java.util.ArrayList;
public class GridViewAdapter extends BaseAdapter {
Context c;
ArrayList<Spacecraft> spacecrafts;
public GridViewAdapter(Context c, ArrayList<Spacecraft> spacecrafts) {
this.c = c;
this.spacecrafts = spacecrafts;
}
@Override
public int getCount() {
return spacecrafts.size();
}
@Override
public Object getItem(int i) {
return spacecrafts.get(i);
}
@Override
public long getItemId(int i) {
return i;
}
@Override
public View getView(int i, View view, ViewGroup viewGroup) {
if(view==null)
{
view= LayoutInflater.from(c).inflate(R.layout.model,viewGroup,false);
}
TextView txtName = (TextView) view.findViewById(R.id.nameTxt);
TextView txtPropellant = (TextView) view.findViewById(R.id.txtPropellant);
CheckBox chkTechExists = (CheckBox) view.findViewById(R.id.chkTechExists);
final Spacecraft s= (Spacecraft) this.getItem(i);
txtName.setText(s.getName());
txtPropellant.setText(s.getPropellant());
chkTechExists.setChecked( s.getTechnologyExists()==1);
view.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
Toast.makeText(c, s.getName(), Toast.LENGTH_SHORT).show();
}
});
return view;
}
}
(d). MainActivity.java
Our main and launcher activity.
package com.tutorials.hp.mysqlgridviewbool;
import android.os.Bundle;
import android.support.design.widget.FloatingActionButton;
import android.support.design.widget.Snackbar;
import android.support.design.widget.TextInputEditText;
import android.support.v7.app.AppCompatActivity;
import android.support.v7.widget.Toolbar;
import android.view.View;
import android.view.Menu;
import android.view.MenuItem;
import android.widget.ArrayAdapter;
import android.widget.Button;
import android.widget.CheckBox;
import android.widget.GridView;
import android.widget.Spinner;
import android.widget.Toast;
import com.tutorials.hp.mysqlgridviewbool.mAdapter.GridViewAdapter;
import com.tutorials.hp.mysqlgridviewbool.mModel.Spacecraft;
import com.tutorials.hp.mysqlgridviewbool.mMySQL.MySQLClient;
import java.util.ArrayList;
public class MainActivity extends AppCompatActivity {
//INSTANCE FIELDS
private TextInputEditText txtName;
private CheckBox chkTechnologyExists;
private Spinner spPropellant;
private GridView gv;
private Button btnAdd,btnRetrieve;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
setSupportActionBar(toolbar);
//REFERENCE VIEWS
this.initializeViews();
populatePropellants();
//HANDLE EVENTS
this.handleClickEvents();
FloatingActionButton fab = (FloatingActionButton) findViewById(R.id.fab);
fab.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
gv.setAdapter(new GridViewAdapter(MainActivity.this,new ArrayList<Spacecraft>()));
}
});
}
/*
REFERENCE VIEWS
*/
private void initializeViews()
{
txtName= (TextInputEditText) findViewById(R.id.nameTxt);
chkTechnologyExists= (CheckBox) findViewById(R.id.techExists);
spPropellant= (Spinner) findViewById(R.id.sp);
gv= (GridView) findViewById(R.id.gv);
btnAdd= (Button) findViewById(R.id.addBtn);
btnRetrieve= (Button) findViewById(R.id.refreshBtn);
}
/*
HANDLE CLICK EVENTS
*/
private void handleClickEvents()
{
//EVENTS : ADD
btnAdd.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
//GET VALUES
String name=txtName.getText().toString();
String propellant=spPropellant.getSelectedItem().toString();
Boolean technologyexists=chkTechnologyExists.isChecked();
//BASIC CLIENT SIDE VALIDATION
if((name.length()<1 || propellant.length()<1 ))
{
Toast.makeText(MainActivity.this, "Please Enter all Fields", Toast.LENGTH_SHORT).show();
}
else
{
//SAVE
Spacecraft s=new Spacecraft();
s.setName(name);
s.setPropellant(propellant);
s.setTechnologyExists(technologyexists ? 1 : 0);
new MySQLClient(MainActivity.this).add(s,txtName,spPropellant);
}
}
});
//EVENTS : RETRIEVE
btnRetrieve.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
new MySQLClient(MainActivity.this).retrieve(gv);
}
});
}
private void populatePropellants()
{
ArrayAdapter<String> adapter=new ArrayAdapter<String>(this,android.R.layout.simple_spinner_dropdown_item);
adapter.add("None");
adapter.add("Chemical Energy");
adapter.add("Nuclear Energy");
adapter.add("Laser Beam");
adapter.add("Anti-Matter");
adapter.add("Plasma Ions");
adapter.add("Warp Drive");
spPropellant.setAdapter(adapter);
spPropellant.setSelection(0);
}
}
Download
Hey,everything is in source code reference that is well commented and easy to understand and can be downloaded below.
Also check our video tutorial it's more detailed and explained in step by step.
| No. | Location | Link |
|---|---|---|
| 1. | GitHub | Direct Download |
| 2. | GitHub | Browse |
| 3. | YouTube | Video Tutorial |
Example 2: Android MySQL – ListView CheckBoxes – INSERT,SELECT,SHOW
This is an Android MySQ ListView with CheckBoxes tutorial. We want to see how to work with boolean text values. We save them into mysql and also retrieve them.
- We want to see how to work with Android PHP MySQL and Boolean values and strings.
- First we want to insert data to MySQL database.
- The data shall be from a material edittext,a spinner and a checkbox.
- The user types his favorite spacecraft name in the edittext.Then selects the spacecraft's propellant from a spinner.
- He then selects if the technology exists yet or not in the checkbox.
- We shall actually be mapping integers to boolean and vice versa since MySQL doesn't have a native boolean data type.
- Our adapterview is ListView.It has checkboxes to hold boolean values from MySQL database.
Video Tutorial(ProgrammingWizards TV Channel)
Well we have a video tutorial as an alternative to this. If you prefer tutorials like this one then it would be good you subscribe to our YouTube channel.
Basically we have a TV for programming where do daily tutorials especially android.
Android MySQL ListView CheckBoxes Insert, Select Show Example
Let's look at our example:
MySQL Table
Here's our mysql table structure:
Project Structure
Here's our project structure.
1. PHP Code
Here are our php code. Place them in the same folder.
(a) Constants.php
<?php
class Constants
{
//DATABASE DETAILS
static $DB_SERVER="localhost";
static $DB_NAME="galileoDB";
static $USERNAME="root";
static $PASSWORD="";
const TB_NAME="galileoTB";
//STATEMENTS
static $SQL_SELECT_ALL="SELECT * FROM galileoTB";
}
(b) CRUD.php
<?php
require_once("/DBAdapter.php");
if($_POST['action']=="save"){
$dbAdapter=new DBAdapter();
$name=$_POST['name'];
$propellant=$_POST['propellant'];
$technologyexists=$_POST['technologyexists'];
$dbAdapter->insert(array($name,$propellant,$technologyexists));
}
else if($_POST['action']=="update")
{
$dbAdapter=new DBAdapter();
$id=$_POST['id'];
$name=$_POST['name'];
$propellant=$_POST['propellant'];
$technologyexists=$_POST['technologyexists'];
$dbAdapter->update($id,array($name,$propellant,$technologyexists));
}
else if($_POST['action']=="delete")
{
$dbAdapter=new DBAdapter();
$id=$_POST['id'];
$dbAdapter->delete($id);
}
?>
(c) DBAdapter.php
<?php
require_once("/Constants.php");
class DBAdapter
{
/*******************************************************************************************************************************************/
/*
1.CONNECT TO DATABASE.
2. RETURN CONNECTION OBJECT
*/
public function connect()
{
$con=mysqli_connect(Constants::$DB_SERVER,Constants::$USERNAME,Constants::$PASSWORD,Constants::$DB_NAME);
if(mysqli_connect_error(!$con))
{
// echo "Unable To Connect";
return null;
}else
{
return $con;
}
}
/*******************************************************************************************************************************************/
/*
1.INSERT SPACECRAFT INTO DATABASE
*/
public function insert($s)
{
// INSERT
$con=$this->connect();
if($con != null)
{
$sql="INSERT INTO galileoTB(name,propellant,technologyexists) VALUES('$s[0]','$s[1]','$s[2]')";
try
{
$result=mysqli_query($con,$sql);
if($result)
{
print(json_encode(array("Success")));
}else
{
print(json_encode(array("Unsuccessfull")));
}
}catch (Exception $e)
{
print(json_encode(array("PHP EXCEPTION : CAN'T SAVE TO MYSQL. "+$e->getMessage())));
}
}else{
print(json_encode(array("PHP EXCEPTION : CAN'T CONNECT TO MYSQL. NULL CONNECTION.")));
}
mysqli_close($con);
}
/*******************************************************************************************************************************************/
/*
1.SELECT FROM DATABASE.
*/
public function select()
{
$con=$this->connect();
if($con != null)
{
$retrieved=mysqli_query($con,Constants::$SQL_SELECT_ALL);
if($retrieved)
{
while($row=mysqli_fetch_array($retrieved))
{
// echo $row["name"] ," t | ",$row["propellant"],"</br>";
$spacecrafts[]=$row;
}
print(json_encode($spacecrafts));
}else
{
print(json_encode(array("PHP EXCEPTION : CAN'T RETRIEVE FROM MYSQL. ")));
}
}else{
print(json_encode(array("PHP EXCEPTION : CAN'T CONNECT TO MYSQL. NULL CONNECTION.")));
}
mysqli_close($con);
}
/*******************************************************************************************************************************************/
/*
1.UPDATE DATABASE.
*/
public function update($id, $s)
{
// UPDATE
$con=$this->connect();
if($con != null)
{
$sql="UPDATE galileoTB SET name='$s[0]',propellant='$s[1]',technologyexists='$s[2]' WHERE id='$id'";
try
{
$result=mysqli_query($con,$sql);
if($result)
{
print(json_encode(array("Successfully Updated")));
}else
{
print(json_encode(array("Not Successfully Updated")));
}
}catch (Exception $e)
{
print(json_encode(array("PHP EXCEPTION : CAN'T UPDATE INTO MYSQL. "+$e->getMessage())));
}
}else{
print(json_encode(array("PHP EXCEPTION : CAN'T CONNECT TO MYSQL. NULL CONNECTION.")));
}
mysqli_close($con);
}
/*******************************************************************************************************************************************/
/*
1.DELETE SPACECRAFT FROM DATABASE.
*/
public function delete($id)
{
$con=$this->connect();
if($con != null)
{
// $name=$_POST['Name'];
// $pos=$_POST['Position'];
// $team=$_POST['Team'];
$sql="DELETE FROM galileoTB WHERE id='$id'";
try
{
$result=mysqli_query($con,$sql);
if($result)
{
print(json_encode(array("Successfully Deleted")));
}else
{
print(json_encode(array("Not Successfully Deleted")));
}
}catch (Exception $e)
{
print(json_encode(array("PHP EXCEPTION : CAN'T DELETE FROM MYSQL. "+$e->getMessage())));
}
}else{
print(json_encode(array("PHP EXCEPTION : CAN'T CONNECT TO MYSQL. NULL CONNECTION.")));
}
mysqli_close($con);
}
}
(d) Index.php
2. Gradle Scripts
Here are our gradle scripts in our build.gradle file(s).
(a). build.gradle(app)
Here's our app level build.gradle file. We have the dependencies DSL where we add our dependencies.
This file is called app level build.gradle since it's located in the app folder of the project.
If you are using Android Studio version 3 and above use implementation keyword while if you are using a version less than 3 then still use the compile keyword.
Once you've modified this build.gradle file you have to sync your project. Android Studio will indeed prompt you to do so.
dependencies {
compile fileTree(dir: 'libs', include: ['*.jar'])
testCompile 'junit:junit:4.12'
compile 'com.android.support:appcompat-v7:24.2.0'
compile 'com.android.support:design:24.2.0'
compile 'com.android.support:cardview-v7:24.2.0'
compile 'com.amitshekhar.android:android-networking:0.2.0'
}
[notice] We are using Fast Android Networking Library as our HTTP Client. You may use newer versions. [/notice]
3. Resoources.
Android platform provides a powerful and flexible way of adding static content as a resource.
These static content will also be packaged into the APK file. The static content will be stored either as a resource or as an asset.
Resources belong to a given type. These types can be:
- Drawable.
- Layout.
- Value.
Let's start by looking at the layout resources
(a). model.xml
Our row model layout.
?xml version="1.0" encoding="utf-8"?>
<android.support.v7.widget.CardView
android_orientation="horizontal" android_layout_width="match_parent"
android_layout_margin="10dp"
card_view_cardCornerRadius="5dp"
card_view_cardElevation="5dp"
android_layout_height="200dp">
<LinearLayout
android_orientation="vertical"
android_layout_width="match_parent"
android_layout_height="match_parent">
<TextView
android_layout_width="match_parent"
android_layout_height="wrap_content"
android_textAppearance="?android:attr/textAppearanceLarge"
android_text="Name"
android_id="@+id/nameTxt"
android_padding="10dp"
android_textColor="@color/colorAccent"
android_textStyle="bold"
android_layout_alignParentLeft="true"
/>
<TextView
android_layout_width="wrap_content"
android_layout_height="wrap_content"
android_textAppearance="?android:attr/textAppearanceLarge"
android_text="Propellant....................."
android_id="@+id/txtPropellant"
android_padding="10dp"
android_layout_alignParentLeft="true"
/>
<CheckBox
android_layout_width="wrap_content"
android_layout_height="wrap_content"
android_textSize="25dp"
android_id="@+id/chkTechExists"
android_checked="true" />
</LinearLayout>
</android.support.v7.widget.CardView>
(b). content_main.xml
Our content_main layout. This layout is being inserted into our activity_main.xml.
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout
android_layout_width="match_parent"
android_layout_height="match_parent"
android_paddingBottom="@dimen/activity_vertical_margin"
android_paddingLeft="@dimen/activity_horizontal_margin"
android_paddingRight="@dimen/activity_horizontal_margin"
android_paddingTop="@dimen/activity_vertical_margin"
app_layout_behavior="@string/appbar_scrolling_view_behavior"
tools_context="com.tutorials.hp.mysqllistviewbool.MainActivity"
tools_showIn="@layout/activity_main">
<LinearLayout
android_orientation="vertical"
android_layout_width="match_parent"
android_layout_height="wrap_content">
<android.support.design.widget.TextInputEditText
android_id="@+id/nameTxt"
android_hint="Name"
android_layout_width="match_parent"
android_layout_height="wrap_content"
android_textStyle="bold"
android_textSize="25dp"
android_enabled="true"
android_focusable="true" />
<LinearLayout
android_orientation="horizontal"
android_padding="5dp"
android_layout_width="match_parent"
android_layout_height="wrap_content">
<TextView
android_textSize="25dp"
android_text="Propellant"
android_textStyle="bold"
android_layout_width="250dp"
android_layout_height="wrap_content" />
<Spinner
android_id="@+id/sp"
android_textSize="25dp"
android_textStyle="bold"
android_layout_width="wrap_content"
android_layout_height="wrap_content" />
</LinearLayout>
<LinearLayout
android_orientation="horizontal"
android_padding="5dp"
android_layout_width="match_parent"
android_layout_height="wrap_content">
<TextView
android_textSize="25dp"
android_text="Technology Exists ??"
android_textStyle="bold"
android_layout_width="250dp"
android_layout_height="wrap_content" />
<CheckBox
android_layout_width="wrap_content"
android_layout_height="wrap_content"
android_textSize="25dp"
android_id="@+id/techExists"
android_checked="true" />
</LinearLayout>
<RelativeLayout
android_orientation="horizontal"
android_layout_width="match_parent"
android_layout_height="wrap_content">
<Button android_id="@+id/addBtn"
android_layout_width="wrap_content"
android_layout_height="60dp"
android_text="Save"
android_clickable="true"
android_padding="5dp"
android_background="#009968"
android_textColor="@android:color/white"
android_textStyle="bold"
android_textSize="20dp" />
<Button android_id="@+id/refreshBtn"
android_layout_width="wrap_content"
android_layout_height="60dp"
android_text="Retrieve"
android_padding="5dp"
android_clickable="true"
android_background="#f38630"
android_textColor="@android:color/white"
android_layout_alignParentTop="true"
android_layout_alignParentRight="true"
android_layout_alignParentEnd="true"
android_textStyle="bold"
android_textSize="20dp" />
</RelativeLayout>
<ListView
android_id="@+id/lv"
android_layout_width="match_parent"
android_layout_height="wrap_content">
</ListView>
</LinearLayout>
</RelativeLayout>
(c). activity_main.xml
Our activity_main layout.
<?xml version="1.0" encoding="utf-8"?>
<android.support.design.widget.CoordinatorLayout
android_layout_width="match_parent"
android_layout_height="match_parent"
android_fitsSystemWindows="true"
tools_context="com.tutorials.hp.mysqllistviewbool.MainActivity">
<android.support.design.widget.AppBarLayout
android_layout_width="match_parent"
android_layout_height="wrap_content"
android_theme="@style/AppTheme.AppBarOverlay">
<android.support.v7.widget.Toolbar
android_id="@+id/toolbar"
android_layout_width="match_parent"
android_layout_height="?attr/actionBarSize"
android_background="?attr/colorPrimary"
app_popupTheme="@style/AppTheme.PopupOverlay" />
</android.support.design.widget.AppBarLayout>
<include layout="@layout/content_main" />
<android.support.design.widget.FloatingActionButton
android_id="@+id/fab"
android_layout_width="wrap_content"
android_layout_height="wrap_content"
android_layout_gravity="bottom|end"
android_layout_margin="@dimen/fab_margin"
android_src="@android:drawable/ic_dialog_email" />
</android.support.design.widget.CoordinatorLayout>
(a). Spacecraft.java
First we have a data object POJO class as below.
package com.tutorials.hp.mysqllistviewbool.mModel;
public class Spacecraft {
/*
INSTANCE FIELDS
*/
private int id;
private String name;
private String propellant;
private int technologyExists;
/*
GETTERS AND SETTERS
*/
public int getId() {
return id;
}
public void setId(int id) {
this.id = id;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String getPropellant() {
return propellant;
}
public void setPropellant(String propellant) {
this.propellant = propellant;
}
public int getTechnologyExists() {
return technologyExists;
}
public void setTechnologyExists(int technologyExists) {
this.technologyExists = technologyExists;
}
/*
TOSTRING
*/
@Override
public String toString() {
return name;
}
}
(b). MySQLClient.java
Our most important class is our MySQL Client class.It is responsible fro bothh connecting,inserting and retrieving data and handling errors appropriately.We are using the easy to use yet efficient Android Networking Library.
package com.tutorials.hp.mysqllistviewbool.mMySQL;
import android.content.Context;
import android.view.View;
import android.widget.EditText;
import android.widget.ListView;
import android.widget.Spinner;
import android.widget.Toast;
import com.androidnetworking.AndroidNetworking;
import com.androidnetworking.common.Priority;
import com.androidnetworking.error.ANError;
import com.androidnetworking.interfaces.JSONArrayRequestListener;
import com.tutorials.hp.mysqllistviewbool.mAdapter.ListViewAdapter;
import com.tutorials.hp.mysqllistviewbool.mModel.Spacecraft;
import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;
import java.util.ArrayList;
public class MySQLClient {
//SAVE/RETRIEVE URLS
private static final String DATA_INSERT_URL="http://10.0.2.2/android/Aristotle/crud.php";
private static final String DATA_RETRIEVE_URL="http://10.0.2.2/android/Aristotle/index.php";
//INSTANCE FIELDS
private final Context c;
private ListViewAdapter adapter ;
public MySQLClient(Context c) {
this.c = c;
}
/*
SAVE/INSERT
*/
public void add(Spacecraft s, final View...inputViews)
{
if(s==null)
{
Toast.makeText(c, "No Data To Save", Toast.LENGTH_SHORT).show();
}
else
{
AndroidNetworking.post(DATA_INSERT_URL)
.addBodyParameter("action","save")
.addBodyParameter("name",s.getName())
.addBodyParameter("propellant",s.getPropellant())
.addBodyParameter("technologyexists",String.valueOf(s.getTechnologyExists()))
.setTag("TAG_ADD")
.build()
.getAsJSONArray(new JSONArrayRequestListener() {
@Override
public void onResponse(JSONArray response) {
if(response != null)
try {
//SHOW RESPONSE FROM SERVER
String responseString = response.get(0).toString();
Toast.makeText(c, "PHP SERVER RESPONSE : " + responseString, Toast.LENGTH_SHORT).show();
if (responseString.equalsIgnoreCase("Success")) {
//RESET VIEWS
EditText nameTxt = (EditText) inputViews[0];
Spinner spPropellant = (Spinner) inputViews[1];
nameTxt.setText("");
spPropellant.setSelection(0);
}else
{
Toast.makeText(c, "PHP WASN'T SUCCESSFUL. ", Toast.LENGTH_SHORT).show();
}
} catch (JSONException e) {
e.printStackTrace();
Toast.makeText(c, "GOOD RESPONSE BUT JAVA CAN'T PARSE JSON IT RECEIVED : "+e.getMessage(), Toast.LENGTH_SHORT).show();
}
}
//ERROR
@Override
public void onError(ANError anError) {
Toast.makeText(c, "UNSUCCESSFUL : ERROR IS : "+anError.getMessage(), Toast.LENGTH_SHORT).show();
}
});
}
}
/*
RETRIEVE/SELECT/REFRESH
*/
public void retrieve(final ListView lv)
{
final ArrayList<Spacecraft> spacecrafts = new ArrayList<>();
AndroidNetworking.get(DATA_RETRIEVE_URL)
.setPriority(Priority.HIGH)
.build()
.getAsJSONArray(new JSONArrayRequestListener() {
@Override
public void onResponse(JSONArray response) {
JSONObject jo;
Spacecraft s;
try
{
for(int i=0;i<response.length();i++)
{
jo=response.getJSONObject(i);
int id=jo.getInt("id");
String name=jo.getString("name");
String propellant=jo.getString("propellant");
String techExists=jo.getString("technologyexists");
s=new Spacecraft();
s.setId(id);
s.setName(name);
s.setPropellant(propellant);
s.setTechnologyExists(techExists.equalsIgnoreCase("1") ? 1 : 0);
spacecrafts.add(s);
}
//SET TO SPINNER
adapter =new ListViewAdapter(c,spacecrafts);
lv.setAdapter(adapter);
}catch (JSONException e)
{
Toast.makeText(c, "GOOD RESPONSE BUT JAVA CAN'T PARSE JSON IT RECEIEVED. "+e.getMessage(), Toast.LENGTH_LONG).show();
}
}
//ERROR
@Override
public void onError(ANError anError) {
anError.printStackTrace();
Toast.makeText(c, "UNSUCCESSFUL : ERROR IS : "+anError.getMessage(), Toast.LENGTH_LONG).show();
}
});
}
}
(c). ListViewAdapter.java
We also have our ListView adapter to map our dataset to the adapterview.
package com.tutorials.hp.mysqllistviewbool.mAdapter;
import android.content.Context;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.CheckBox;
import android.widget.TextView;
import android.widget.Toast;
import com.tutorials.hp.mysqllistviewbool.R;
import com.tutorials.hp.mysqllistviewbool.mModel.Spacecraft;
import java.util.ArrayList;
public class ListViewAdapter extends BaseAdapter {
Context c;
ArrayList<Spacecraft> spacecrafts;
public ListViewAdapter(Context c, ArrayList<Spacecraft> spacecrafts) {
this.c = c;
this.spacecrafts = spacecrafts;
}
@Override
public int getCount() {
return spacecrafts.size();
}
@Override
public Object getItem(int i) {
return spacecrafts.get(i);
}
@Override
public long getItemId(int i) {
return i;
}
@Override
public View getView(int i, View view, ViewGroup viewGroup) {
if(view==null)
{
view= LayoutInflater.from(c).inflate(R.layout.model,viewGroup,false);
}
TextView txtName = (TextView) view.findViewById(R.id.nameTxt);
TextView txtPropellant = (TextView) view.findViewById(R.id.txtPropellant);
CheckBox chkTechExists = (CheckBox) view.findViewById(R.id.chkTechExists);
final Spacecraft s= (Spacecraft) this.getItem(i);
txtName.setText(s.getName());
txtPropellant.setText(s.getPropellant());
chkTechExists.setChecked( s.getTechnologyExists()==1);
view.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
Toast.makeText(c, s.getName(), Toast.LENGTH_SHORT).show();
}
});
return view;
}
}
(d). MainActivity.java
The main activity.
package com.tutorials.hp.mysqllistviewbool;
import android.os.Bundle;
import android.support.design.widget.FloatingActionButton;
import android.support.design.widget.TextInputEditText;
import android.support.v7.app.AppCompatActivity;
import android.support.v7.widget.Toolbar;
import android.view.View;
import android.widget.ArrayAdapter;
import android.widget.Button;
import android.widget.CheckBox;
import android.widget.ListView;
import android.widget.Spinner;
import android.widget.Toast;
import com.tutorials.hp.mysqllistviewbool.mAdapter.ListViewAdapter;
import com.tutorials.hp.mysqllistviewbool.mModel.Spacecraft;
import com.tutorials.hp.mysqllistviewbool.mMySQL.MySQLClient;
import java.util.ArrayList;
public class MainActivity extends AppCompatActivity {
//INSTANCE FIELDS
private TextInputEditText txtName;
private CheckBox chkTechnologyExists;
private Spinner spPropellant;
private ListView lv;
private Button btnAdd,btnRetrieve;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
setSupportActionBar(toolbar);
//REFERENCE VIEWS
this.initializeViews();
populatePropellants();
//HANDLE EVENTS
this.handleClickEvents();
FloatingActionButton fab = (FloatingActionButton) findViewById(R.id.fab);
fab.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
lv.setAdapter(new ListViewAdapter(MainActivity.this,new ArrayList<Spacecraft>()));
}
});
}
/*
REFERENCE VIEWS
*/
private void initializeViews()
{
txtName= (TextInputEditText) findViewById(R.id.nameTxt);
chkTechnologyExists= (CheckBox) findViewById(R.id.techExists);
spPropellant= (Spinner) findViewById(R.id.sp);
lv= (ListView) findViewById(R.id.lv);
btnAdd= (Button) findViewById(R.id.addBtn);
btnRetrieve= (Button) findViewById(R.id.refreshBtn);
}
/*
HANDLE CLICK EVENTS
*/
private void handleClickEvents()
{
//EVENTS : ADD
btnAdd.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
//GET VALUES
String name=txtName.getText().toString();
String propellant=spPropellant.getSelectedItem().toString();
Boolean technologyexists=chkTechnologyExists.isChecked();
//BASIC CLIENT SIDE VALIDATION
if((name.length()<1 || propellant.length()<1 ))
{
Toast.makeText(MainActivity.this, "Please Enter all Fields", Toast.LENGTH_SHORT).show();
}
else
{
//SAVE
Spacecraft s=new Spacecraft();
s.setName(name);
s.setPropellant(propellant);
s.setTechnologyExists(technologyexists ? 1 : 0);
new MySQLClient(MainActivity.this).add(s,txtName,spPropellant);
}
}
});
//EVENTS : RETRIEVE
btnRetrieve.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
new MySQLClient(MainActivity.this).retrieve(lv);
}
});
}
private void populatePropellants()
{
ArrayAdapter<String> adapter=new ArrayAdapter<String>(this,android.R.layout.simple_spinner_dropdown_item);
adapter.add("None");
adapter.add("Chemical Energy");
adapter.add("Nuclear Energy");
adapter.add("Laser Beam");
adapter.add("Anti-Matter");
adapter.add("Plasma Ions");
adapter.add("Warp Drive");
spPropellant.setAdapter(adapter);
spPropellant.setSelection(0);
}
}
Download
Hey,everything is in source code reference that is well commented and easy to understand and can be downloaded below.
Also check our video tutorial it's more detailed and explained in step by step.
| No. | Location | Link |
|---|---|---|
| 1. | GitHub | Direct Download |
| 2. | GitHub | Browse |
| 3. | YouTube | Video Tutorial |