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该播放器将会直接从网络上获取资源进行播放，并提供进度条显示的功能
布局文件中使用Seekbar组件来显示进度条
<?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:orientation="vertical" android:layout_width="match_parent" android:layout_height="match_parent"> <Button android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="开始播放" android:onClick="play"/> <Button android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="暂停播放" android:onClick="pause"/> <Button android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="继续播放" android:onClick="continuePlay"/> <SeekBar android:id="@+id/sb" android:layout_width="match_parent" android:layout_height="wrap_content" /> </LinearLayout>
在Activity中需要做两件事情，第一：从消息队列中获取关于当前MP3的播放进度，通过播放进度修改SeekBar的属性。第二：因为可以通过进度条来控制播放进度，所以获取进度条的相关信息来控制播放进度。
package xidian.dy.com.chujia; import android.content.ComponentName; import android.content.Intent; import android.content.ServiceConnection; import android.os.Bundle; import android.os.Handler; import android.os.IBinder; import android.os.Message; import android.support.v7.app.AppCompatActivity; import android.view.View; import android.widget.SeekBar; public class MainActivity extends AppCompatActivity { IMusic music; static SeekBar sb; static Handler handler = new Handler(){ public void handleMessage(Message msg){ Bundle bundle = msg.getData(); sb.setMax(bundle.getInt("duration")); sb.setProgress(bundle.getInt("current")); } }; @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); Intent intent = new Intent(this, MusicService.class); startService(intent); bindService(intent, new MyConnection(), BIND_AUTO_CREATE); sb = (SeekBar) findViewById(R.id.sb); sb.setOnSeekBarChangeListener(new SeekBar.OnSeekBarChangeListener() { @Override public void onProgressChanged(SeekBar seekBar, int progress, boolean fromUser) { } @Override public void onStartTrackingTouch(SeekBar seekBar) { } @Override public void onStopTrackingTouch(SeekBar seekBar) { music.seekTo(seekBar.getProgress()); } }); } public void play(View v){ music.play(); } public void pause(View v){ music.pause(); } public void continuePlay(View v){ music.continuePlay(); } class MyConnection implements ServiceConnection{ @Override public void onServiceConnected(ComponentName name, IBinder service) { music = (IMusic) service; } @Override public void onServiceDisconnected(ComponentName name) { } } }
在Service中需要过去当前的播放信息，并将其写在消息队列中传递给Activity线程。并且向外提供一个提供改变当前播放进度接口
package xidian.dy.com.chujia; import android.app.Service; import android.content.Intent; import android.media.MediaPlayer; import android.os.Binder; import android.os.Bundle; import android.os.IBinder; import android.os.Message; import android.support.annotation.Nullable; import android.util.Log; import java.io.IOException; import java.util.Timer; import java.util.TimerTask; /** * Created by dy on 2016/7/29. */ public class MusicService extends Service { MediaPlayer player; Timer timer; @Override public void onCreate() { player = new MediaPlayer(); timer = new Timer(); super.onCreate(); } @Nullable @Override public IBinder onBind(Intent intent) { return new MyBinder(); } public void continuePlay(){ player.start(); } public void pause(){ player.pause(); } public void play(){ player.reset(); try { player.setDataSource("http://123.206.68.138/mg.mp3"); player.prepareAsync(); player.setOnPreparedListener(new MediaPlayer.OnPreparedListener() { @Override public void onPrepared(MediaPlayer mp) { mp.start(); timer.schedule(new TimerTask() { @Override public void run() { Bundle bundle = new Bundle(); bundle.putInt("duration", player.getDuration()); bundle.putInt("current", player.getCurrentPosition()); Message msg = MainActivity.handler.obtainMessage(); msg.setData(bundle); MainActivity.handler.sendMessage(msg); Log.i("duration", String.valueOf(player.getDuration())); } }, 5, 500); } }); } catch (IOException e) { e.printStackTrace(); } } @Override public void onDestroy() { super.onDestroy(); player.stop(); player.release(); timer.cancel(); } class MyBinder extends Binder implements IMusic{ @Override public void play() { MusicService.this.play(); } @Override public void pause() { MusicService.this.pause(); } public void seekTo(int msc){ player.seekTo(msc); } @Override public void continuePlay() { MusicService.this.continuePlay(); } } }
该接口是连接service和Activity的
package xidian.dy.com.chujia; /** * Created by dy on 2016/7/29. */ public interface IMusic { void play(); void pause(); void continuePlay(); void seekTo(int msc); }
在清单文件中需要开启网络权限
<?xml version="1.0" encoding="utf-8"?> <manifest xmlns:android="http://schemas.android.com/apk/res/android" package="xidian.dy.com.chujia"> <uses-permission android:name="android.permission.INTERNET"/> <application android:allowBackup="true" android:icon="@mipmap/ic_launcher" android:label="@string/app_name" android:supportsRtl="true" android:theme="@style/AppTheme"> <activity android:name=".MainActivity" android:label="主界面"> <intent-filter> <action android:name="android.intent.action.MAIN" /> <category android:name="android.intent.category.LAUNCHER" /> </intent-filter> </activity> <service android:name=".MusicService"/> </application> </manifest>
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原文地址：http://www.cnblogs.com/xidongyu/p/5721147.html
