Android uses service to play music instance code

Source: Internet
Author: User
Tags bind

Use of the Android service:

We can create an Android program that creates an activity in the SRC directory, a service class that inherits from the services class, and creates a raw folder in the Resource folder res directory to store audio files, such as putting Music.mp3 music files in the directory. The main interface of the program is as follows:

XML layout

The code is as follows Copy Code

<?xml version= "1.0" encoding= "Utf-8"?>
<linearlayout xmlns:android= "Http://schemas.android.com/apk/res/android"
android:orientation= "Vertical"
Android:layout_width= "Fill_parent"
android:layout_height= "Fill_parent"
>
<textview
Android:layout_width= "Fill_parent"
android:layout_height= "Wrap_content"
Android:text= "Welcome to Andy ' s blog!"
Android:textsize= "16sp"/>
<textview
Android:layout_width= "Fill_parent"
android:layout_height= "Wrap_content"
android:text= "Music playback service"/>
<button
Android:id= "@+id/startmusic"
Android:layout_width= "Wrap_content"
android:layout_height= "Wrap_content"
android:text= "Open music playback service"/>
<button
Android:id= "@+id/stopmusic"
Android:layout_width= "Wrap_content"
android:layout_height= "Wrap_content"
android:text= "Stop music playback service"/>
<button
Android:id= "@+id/bindmusic"
Android:layout_width= "Wrap_content"
android:layout_height= "Wrap_content"
Android:text= "Bind music playback service"/>
<button
Android:id= "@+id/unbindmusic"
Android:layout_width= "Wrap_content"
android:layout_height= "Wrap_content"
android:text= "Unbind--Bind music playback service"/>
</LinearLayout>

Java code

The code is as follows Copy Code

Musicservice.java

Package com.zeph.android.service;

Import Android.app.Service;
Import android.content.Intent;
Import Android.media.MediaPlayer;
Import Android.os.IBinder;

public class Musicservice extends Service {
Private MediaPlayer Mmediaplayer;

@Override
Public IBinder Onbind (Intent arg0) {
return null;
}

@Override
public void OnCreate () {
Super.oncreate ();
Mmediaplayer = Mediaplayer.create (this, R.RAW.MUSIC01);
}

@Override
public void OnDestroy () {
Super.ondestroy ();
Mmediaplayer.stop ();
Mmediaplayer.release ();
}

  @Override
 public void OnStart (Intent Intent, int startid) {
  super.onstart (Intent, Startid);
  int operate = Intent.getintextra ("Operate", 3);
  switch (operate) {
  case 0:
   if (!mmediaplayer.isplaying ()) {
    mmediaplayer.start ();
   }
   break;
  case 1:
   if (mmediaplayer.isplaying ()) {
     Mmediaplayer.pause ();
   }
   break;
  case 2:
   if (mmediaplayer.isplaying ()) {
     Mmediaplayer.stop ();
    mmediaplayer = Mediaplayer.create (this, R.RAW.MUSIC01);
   }
   break;
  default:
   break
  
 }

Servicetestactivity.java

Package com.zeph.android.service;

Import android.app.Activity;
Import android.content.Intent;
Import Android.os.Bundle;
Import Android.view.View;
Import Android.view.View.OnClickListener;
Import Android.widget.Button;

public class Servicetestactivity extends activity {
Private Button PlayButton;
Private Button Pausebutton;
Private Button Stopbutton;
Private Button StopService;

@Override
public void OnCreate (Bundle savedinstancestate) {
Super.oncreate (savedinstancestate);
Setcontentview (R.layout.main);
PlayButton = (Button) Findviewbyid (R.id.playbutton);
Pausebutton = (Button) Findviewbyid (R.id.pausebutton);
Stopbutton = (Button) Findviewbyid (R.id.stopbutton);
StopService = (Button) Findviewbyid (R.id.stopservice);

Playbutton.setonclicklistener (New Buttononclicklistener ());
Pausebutton.setonclicklistener (New Buttononclicklistener ());
Stopbutton.setonclicklistener (New Buttononclicklistener ());
Stopservice.setonclicklistener (New Buttononclicklistener ());
}

public class Buttononclicklistener implements Onclicklistener {

@Override
public void OnClick (view view) {
Intent Intent = new Intent ();
Intent.setclass (Getapplicationcontext (), musicservice.class);
if (view = = PlayButton) {
Intent.putextra ("operate", 0);
StartService (Intent);
else if (view = = Pausebutton) {
Intent.putextra ("Operate", 1);
StartService (Intent);
else if (view = = Stopbutton) {
Intent.putextra ("Operate", 2);
StartService (Intent);
else if (view = = StopService) {
StopService (Intent);
}
}
}
}

The service also needs to be registered with Androidmanifest.xml:

The code is as follows Copy Code

<?xml version= "1.0" encoding= "Utf-8"?>
<manifest xmlns:android= "Http://schemas.android.com/apk/res/android"
Package= "Com.pocketdigi.service"
Android:versioncode= "1"
Android:versionname= "1.0" >
<application android:icon= "@drawable/icon" android:label= "@string/app_name" >
<activity android:name= ". Main"
Android:label= "@string/app_name" >
<intent-filter>
<action android:name= "Android.intent.action.MAIN"/>
<category android:name= "Android.intent.category.LAUNCHER"/>
</intent-filter>
</activity>
<service android:enabled= "true" android:name=. Music "/>
</application>
</manifest>

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