Onedayoneex: 3 music player

Document directory

• Mainactivity. Java
• Musicservice. Java
• Androidmainfest. xml

Mainactivity. Java

Package COM. example. RRT; 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 mainactivity extends activity implements onclicklistener {// create the Private Static final string tag = "playmusic"; // obtain the private button playbtn; private button stopbt N; private button pausebtn; Public void oncreate (bundle savedinstancestate) {super. oncreate (savedinstancestate); setcontentview (R. layout. activity_main); findview (); bindbutton ();} private void findview () {playbtn = (button) findviewbyid (R. id. play); stopbtn = (button) findviewbyid (R. id. stop); pausebtn = (button) findviewbyid (R. id. pause);} // bind event private void bindbutton () {playbtn for the button. setonclicklistener (this); stop BTN. setonclicklistener (this); pausebtn. setonclicklistener (this);} // rewrite the onclick event // determine the button ID for different processing @ overridepublic void onclick (view v) {log. D (TAG, "onclick: onclick ()"); int op =-1; // intent: the communication between components is mainly completed by intent. // Reference: http://bbs.hiapk.com/thread-7959-1-1.htmlIntent intent = new intent ("com. yang. android. music "); Switch (v. GETID () {case R. id. play: // Play log. D (TAG, "onclick: Play Music"); OP = 1; break; case R. id. stop: // stop log. D (TAG, "onclick: Stop music"); OP = 2; break; case R. id. pause: // pause log. D (TAG, "onclick: pause music"); OP = 3; break;} // bundle is a class in Android development used for data transmission between activities. // Reference: http://zhidao.baidu.com/question/187391685.htmlBundle bundle = new bundle (); bundle. putint ("op", OP); intent. putextras (bundle); // service is a component in the Android system. It is similar to the activity level, but it cannot run on its own. It can only run on the background. // reference: http://ant-qingyun27sc.iteye.com/blog/1596073startService (intent );}}

Musicservice. Java

package com.example.rrt;import java.io.IOException;import android.app.Service;import android.content.Intent;import android.media.MediaPlayer;import android.os.Bundle;import android.os.IBinder;import android.util.Log;public class MusicService extends Service {private static final String TAG = "MyService";private MediaPlayer mediaPlayer;@Overridepublic IBinder onBind(Intent arg0) {// TODO Auto-generated method stubreturn null;}@Overridepublic void onCreate() {Log.v(TAG, "onCreate");if(mediaPlayer == null){mediaPlayer = MediaPlayer.create(this, R.raw.test);mediaPlayer.setLooping(false);}}@Overridepublic void onDestroy() {Log.v(TAG, "onDestroy");if(mediaPlayer != null){mediaPlayer.stop();mediaPlayer.release();}}@Overridepublic void onStart(Intent intent, int startId){Log.v(TAG,"onStart");if(intent != null){Bundle bundle = intent.getExtras();if(bundle != null){int op = bundle.getInt("op");switch(op) {case 1:play();break;case 2:stop();break;case 3:pause();break;}}}}public void play() {Log.v(TAG,"play");if (!mediaPlayer.isPlaying()) {mediaPlayer.start();}}public void pause() {Log.v(TAG,"pause");if(mediaPlayer != null && mediaPlayer.isPlaying()){mediaPlayer.pause();}}public void stop() {Log.v(TAG,"stop");if( mediaPlayer != null ){mediaPlayer.stop();try{mediaPlayer.prepare();}catch (IOException ex) {ex.printStackTrace();}}}}

Androidmainfest. xml

<? XML version = "1.0" encoding = "UTF-8"?> <Manifest xmlns: Android = "http://schemas.android.com/apk/res/android" package = "com. example. RRT "Android: versioncode =" 1 "Android: versionname =" 1.0 "> <uses-SDK Android: minsdkversion =" 8 "Android: targetsdkversion = "17"/> <application Android: allowbackup = "true" Android: icon = "@ drawable/ic_launcher" Android: Label = "@ string/app_name" Android: theme = "@ style/apptheme"> <activity Android: Name = "com. example. RRT. m Ainactivity "Android: Label =" @ string/app_name "> <intent-filter> <action Android: Name =" android. intent. action. main "/> <category Android: Name =" android. intent. category. launcher "/> </intent-filter> </activity> <? Register "musicservice" here?> <Service android: Name = ". musicservice "> <intent-filter> <action Android: Name =" com. yang. android. music "/> <category Android: Name =" android. intent. category. default "/> </intent-filter> </service> </Application> </manifest>