使用服务开启关闭暂停音乐

效果图



xml界面代码

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
android:paddingBottom="@dimen/activity_vertical_margin"
android:paddingLeft="@dimen/activity_horizontal_margin"
android:paddingRight="@dimen/activity_horizontal_margin"
android:paddingTop="@dimen/activity_vertical_margin"
tools:context="com.example.musicservice.MainActivity" >

<Button
android:id="@+id/main_start"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="开启" />

<Button
android:id="@+id/main_stop"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="关闭" />
<Button
android:id="@+id/main_pause"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="暂停"/>
</LinearLayout>

xml配置文件

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example.musicservice"
android:versionCode="1"
android:versionName="1.0" >

<uses-sdk
android:minSdkVersion="8"
android:targetSdkVersion="21" />

<application
android:allowBackup="true"
android:icon="@drawable/ic_launcher"
android:label="@string/app_name"
android:theme="@style/AppTheme" >
<activity
android:name=".MainActivity"
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:name="com.example.musicservice.MusicService">
<intent-filter>
<action android:name="com.etc.lhm"/>
<category android:name="android.intent.category.DEFAULT"/>
</intent-filter>
</service>
</application>

</manifest>

MainActivity.java

package com.example.musicservice;

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 MainActivity extends Activity implements OnClickListener {
private Button start, stop, pause;

@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
start = (Button) findViewById(R.id.main_start);
stop = (Button) findViewById(R.id.main_stop);
pause = (Button) findViewById(R.id.main_pause);
start.setOnClickListener(this);
stop.setOnClickListener(this);
pause.setOnClickListener(this);
}

@Override
public void onClick(View v) {
Intent intent = new Intent("com.etc.lhm");
switch (v.getId()) {
case R.id.main_start:
intent.putExtra("action", "start");
startService(intent);// 启动
break;
case R.id.main_stop:
intent.putExtra("action", "stop");
startService(intent);// 关闭
break;
case R.id.main_pause:
intent.putExtra("action", "pause");
startService(intent);
break;
default:
break;
}
}
}

MusicService

package com.example.musicservice;

import android.app.Service;
import android.content.Intent;
import android.media.MediaPlayer;
import android.os.IBinder;

public class MusicService extends Service {
// 安卓自带音乐播放器对象
private MediaPlayer mediaPlayer;
private boolean isPlaying;
private boolean isPause;
private boolean isRelease;

@Override
public IBinder onBind(Intent intent) {
// TODO Auto-generated method stub
return null;
}

/**
* 开启服务的方法
*/
@Override
public int onStartCommand(Intent intent, int flags, int startId) {
String action = intent.getStringExtra("action");
if (action.equals("start")) {
start();
} else if (action.equals("pause")) {
pause();
} else if (action.equals("stop")) {
stop();
}
return super.onStartCommand(intent, flags, startId);
}

/**
* 关闭服务的方法
*/
@Override
public void onDestroy() {
super.onDestroy();
if (mediaPlayer != null) {
mediaPlayer.stop();
}
}

public void start() {
if (!isPlaying) {
mediaPlayer = MediaPlayer.create(MusicService.this, R.raw.aaa);
mediaPlayer.start();
isPlaying = true;
isRelease=false;
isPause=false;
}
}

public void pause() {
if (mediaPlayer != null && !isRelease) {
if (!isPause) {
mediaPlayer.pause();
isPause = true;
isPlaying = false;
} else {
mediaPlayer.start();
isPause = false;
isPlaying=true;
}
isRelease=false;
}
}

public void stop() {
if (mediaPlayer != null && isPlaying) {
if (!isRelease) {
mediaPlayer.stop();
mediaPlayer.release();
isRelease = true;
}
isPlaying = false;
isPause=false;
}
}
}