Hello friends,
Today I am going to share my R & D on Services in Android. A Service is a component that can run in the background for an arbitrary amount of time. As with the activity tag, you can optionally include one or more <intent-filter> elements that the service supports or <meta-data> values; see the activity's <intent-filter> and <meta-data> descriptions for more information.
Services Life cycle is totally differences to Activity life cycle. Copy below given code and test it yourself-
1)Create new android demo project.
2)Create MyService.java class.
3)Create ServiceDemo.java activity.
4)And for testing Create a new activity NextPage.java
5)Create a raw folder inside your res folder and put a .mp3 file/song into raw folder.
6)Create main.xml
7)Create next.xml
8)Add Services in manifest.xml-
<service
android:name=".MyService"
android:enabled="true" />
My Code-
1)Myservice.java
package com.example.seevicedemoaudioplayer;
import android.app.Service;
import android.content.Intent;
import android.media.MediaPlayer;
import android.os.IBinder;
import android.util.Log;
import android.widget.Toast;
public class MyService extends Service {
private static final String TAG = "My Service Demo";
MediaPlayer myPlayer;
@Override
public IBinder onBind(Intent intent) {
return null;
}
@Override
public void onCreate() {
Toast.makeText(this, "My Service Created", Toast.LENGTH_LONG).show();
Log.d(TAG, "onCreate");
myPlayer = MediaPlayer.create(this, R.raw.loveme);
myPlayer.setLooping(false); // Set looping
}
@Override
public void onDestroy() {
Toast.makeText(this, "My Service Stopped", Toast.LENGTH_LONG).show();
Log.d(TAG, "onDestroy");
myPlayer.stop();
}
@Override
public void onStart(Intent intent, int startid) {
Toast.makeText(this, "My Service Started", Toast.LENGTH_LONG).show();
Log.d(TAG, "onStart");
myPlayer.start();
}
}
2)ServicesDemo.java
package com.example.seevicedemoaudioplayer;
import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
public class ServicesDemo extends Activity implements OnClickListener {
private static final String TAG = "ServicesDemo";
Button buttonStart, buttonStop,buttonNext;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
buttonStart = (Button) findViewById(R.id.buttonStart);
buttonStop = (Button) findViewById(R.id.buttonStop);
buttonNext = (Button) findViewById(R.id.buttonNext);
buttonStart.setOnClickListener(this);
buttonStop.setOnClickListener(this);
buttonNext.setOnClickListener(this);
}
public void onClick(View src) {
switch (src.getId()) {
case R.id.buttonStart:
Log.d(TAG, "onClick: starting srvice");
startService(new Intent(this, MyService.class));
break;
case R.id.buttonStop:
Log.d(TAG, "onClick: stopping srvice");
stopService(new Intent(this, MyService.class));
break;
case R.id.buttonNext:
Log.d(TAG, "onClick: next Page");
Intent intent=new Intent(this,NextPage.class);
startActivity(intent);
break;
}
}
}
3)NextPage.java
package com.example.seevicedemoaudioplayer;
import android.app.Activity;
import android.os.Bundle;
public class NextPage extends Activity {
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.next);
}
}
Today I am going to share my R & D on Services in Android. A Service is a component that can run in the background for an arbitrary amount of time. As with the activity tag, you can optionally include one or more <intent-filter> elements that the service supports or <meta-data> values; see the activity's <intent-filter> and <meta-data> descriptions for more information.
Services Life cycle is totally differences to Activity life cycle. Copy below given code and test it yourself-
Screen Shot:
1)Create new android demo project.
2)Create MyService.java class.
3)Create ServiceDemo.java activity.
4)And for testing Create a new activity NextPage.java
5)Create a raw folder inside your res folder and put a .mp3 file/song into raw folder.
6)Create main.xml
7)Create next.xml
8)Add Services in manifest.xml-
<service
android:name=".MyService"
android:enabled="true" />
My Code-
1)Myservice.java
package com.example.seevicedemoaudioplayer;
import android.app.Service;
import android.content.Intent;
import android.media.MediaPlayer;
import android.os.IBinder;
import android.util.Log;
import android.widget.Toast;
public class MyService extends Service {
private static final String TAG = "My Service Demo";
MediaPlayer myPlayer;
@Override
public IBinder onBind(Intent intent) {
return null;
}
@Override
public void onCreate() {
Toast.makeText(this, "My Service Created", Toast.LENGTH_LONG).show();
Log.d(TAG, "onCreate");
myPlayer = MediaPlayer.create(this, R.raw.loveme);
myPlayer.setLooping(false); // Set looping
}
@Override
public void onDestroy() {
Toast.makeText(this, "My Service Stopped", Toast.LENGTH_LONG).show();
Log.d(TAG, "onDestroy");
myPlayer.stop();
}
@Override
public void onStart(Intent intent, int startid) {
Toast.makeText(this, "My Service Started", Toast.LENGTH_LONG).show();
Log.d(TAG, "onStart");
myPlayer.start();
}
}
2)ServicesDemo.java
package com.example.seevicedemoaudioplayer;
import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
public class ServicesDemo extends Activity implements OnClickListener {
private static final String TAG = "ServicesDemo";
Button buttonStart, buttonStop,buttonNext;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
buttonStart = (Button) findViewById(R.id.buttonStart);
buttonStop = (Button) findViewById(R.id.buttonStop);
buttonNext = (Button) findViewById(R.id.buttonNext);
buttonStart.setOnClickListener(this);
buttonStop.setOnClickListener(this);
buttonNext.setOnClickListener(this);
}
public void onClick(View src) {
switch (src.getId()) {
case R.id.buttonStart:
Log.d(TAG, "onClick: starting srvice");
startService(new Intent(this, MyService.class));
break;
case R.id.buttonStop:
Log.d(TAG, "onClick: stopping srvice");
stopService(new Intent(this, MyService.class));
break;
case R.id.buttonNext:
Log.d(TAG, "onClick: next Page");
Intent intent=new Intent(this,NextPage.class);
startActivity(intent);
break;
}
}
}
3)NextPage.java
package com.example.seevicedemoaudioplayer;
import android.app.Activity;
import android.os.Bundle;
public class NextPage extends Activity {
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.next);
}
}
4)main.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:background="#000000"
android:gravity="center"
android:orientation="vertical" >
<TextView
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:gravity="center"
android:padding="20dp"
android:text="Services Demo"
android:textColor="#ffffff"
android:textSize="20sp" />
<Button
android:id="@+id/buttonStart"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Start" >
</Button>
<Button
android:id="@+id/buttonStop"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Stop" >
</Button>
<Button
android:id="@+id/buttonNext"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Next Page" >
</Button>
</LinearLayout>
5)next.xml
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#000000"
android:orientation="vertical" >
<TextView
android:id="@+id/textView1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentTop="true"
android:layout_centerHorizontal="true"
android:layout_marginTop="169dp"
android:text="Welcome- Second page"
android:textAppearance="?android:attr/textAppearanceLarge"
android:textColor="#ffffff" />
</RelativeLayout>
7)AndroidManifest.xml
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example.seevicedemoaudioplayer"
android:versionCode="1"
android:versionName="1.0" >
<uses-sdk
android:minSdkVersion="8"
android:targetSdkVersion="15" />
<application
android:icon="@drawable/ic_launcher"
android:label="@string/app_name"
android:theme="@style/AppTheme" >
<activity
android:name=".ServicesDemo"
android:label="@string/title_activity_service_demo" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<service
android:name=".MyService"
android:enabled="true" />
<activity
android:name=".NextPage"/>
</application>
</manifest>
Thank you so much!
Your comments awaited...
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