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;@Overrideprotected 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);}@Overridepublic 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;@Overridepublic IBinder onBind(Intent intent) {// TODO Auto-generated method stubreturn null;}/** * 开启服务的方法 */@Overridepublic 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 */@Overridepublic 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;}}}