Android MediaPlayer 多媒体（视频播放器）

MediaPlayer 可以播放音频和视频，另外也可以通过VideoView来播放视频，虽然VideoView比MediaPlayer简单易用，但定制性不如用 MediaPlayer，要视情况选择了。MediaPlayer播放音频比较简单，但是要播放视频就需要SurfaceView。 SurfaceView比普通的自定义View更有绘图上的优势，它支持完全的OpenGL ES库。

main.xml

<?xml version="1.0" encoding="utf-8"?><LinearLayout android:id="@+id/LinearLayout01"android:layout_width="fill_parent" android:layout_height="fill_parent"xmlns:android="http://schemas.android.com/apk/res/android"android:orientation="vertical"><SeekBar android:id="@+id/SeekBar01" android:layout_height="wrap_content"android:layout_width="fill_parent"></SeekBar><LinearLayout android:id="@+id/LinearLayout02"android:layout_width="wrap_content" android:layout_height="wrap_content"><Button android:id="@+id/Button01" android:layout_width="wrap_content"android:layout_height="wrap_content" android:text="播放音频"></Button><Button android:id="@+id/Button02" android:layout_width="wrap_content"android:layout_height="wrap_content" android:text="停止播放"></Button></LinearLayout><SeekBar android:id="@+id/SeekBar02" android:layout_height="wrap_content"android:layout_width="fill_parent"></SeekBar><SurfaceView android:id="@+id/SurfaceView01"android:layout_width="fill_parent" android:layout_height="250px"></SurfaceView><LinearLayout android:id="@+id/LinearLayout02"android:layout_width="wrap_content" android:layout_height="wrap_content"><Button android:layout_width="wrap_content"android:layout_height="wrap_content" android:id="@+id/Button03"android:text="播放视频"></Button><Button android:layout_width="wrap_content"android:layout_height="wrap_content" android:text="停止播放" android:id="@+id/Button04"></Button></LinearLayout></LinearLayout>

package com.testMedia;import java.io.IOException;  import java.util.Timer;import java.util.TimerTask;import android.app.Activity;  import android.media.AudioManager;import android.media.MediaPlayer;import android.os.Bundle;  import android.view.SurfaceHolder;import android.view.SurfaceView;import android.view.View;  import android.widget.Button;  import android.widget.SeekBar;import android.widget.Toast;  public class TestMedia extends Activity {    /** Called when the activity is first created. */     private SeekBar skb_audio=null;    private Button btn_start_audio = null;      private Button btn_stop_audio = null;    private SeekBar skb_video=null;    private Button btn_start_video = null;      private Button btn_stop_video = null;    private SurfaceView surfaceView;     private SurfaceHolder surfaceHolder;         private MediaPlayer m = null;      private Timer mTimer;    private TimerTask mTimerTask;        private boolean isChanging=false;//互斥变量，防止定时器与SeekBar拖动时进度冲突     @Override      public void onCreate(Bundle savedInstanceState) {          super.onCreate(savedInstanceState);          setContentView(R.layout.main);                  //----------Media控件设置---------//        m=new MediaPlayer();                //播放结束之后弹出提示        m.setOnCompletionListener(new MediaPlayer.OnCompletionListener(){@Overridepublic void onCompletion(MediaPlayer arg0) {Toast.makeText(testMedia.this, "结束", 1000).show();m.release();}        });              //----------定时器记录播放进度---------//        mTimer = new Timer();        mTimerTask = new TimerTask() {            @Override            public void run() {            if(isChanging==true)            return;                        if(m.getVideoHeight()==0)            skb_audio.setProgress(m.getCurrentPosition());            else             skb_video.setProgress(m.getCurrentPosition());            }        };        mTimer.schedule(mTimerTask, 0, 10);        btn_start_audio = (Button) this.findViewById(R.id.Button01);          btn_stop_audio = (Button) this.findViewById(R.id.Button02);          btn_start_audio.setOnClickListener(new ClickEvent());        btn_stop_audio.setOnClickListener(new ClickEvent());        skb_audio=(SeekBar)this.findViewById(R.id.SeekBar01);        skb_audio.setOnSeekBarChangeListener(new SeekBarChangeEvent());                btn_start_video = (Button) this.findViewById(R.id.Button03);          btn_stop_video = (Button) this.findViewById(R.id.Button04);          btn_start_video.setOnClickListener(new ClickEvent());        btn_stop_video.setOnClickListener(new ClickEvent());        skb_video=(SeekBar)this.findViewById(R.id.SeekBar02);        skb_video.setOnSeekBarChangeListener(new SeekBarChangeEvent());        surfaceView = (SurfaceView) findViewById(R.id.SurfaceView01);        surfaceHolder = surfaceView.getHolder();        surfaceHolder.setFixedSize(100, 100);        surfaceHolder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);    }         /**   * 按键事件处理   */  class ClickEvent implements View.OnClickListener{@Overridepublic void onClick(View v) {if(v==btn_start_audio){m.reset();//恢复到未初始化的状态m=MediaPlayer.create(testMedia.this, R.raw.big);//读取音频skb_audio.setMax(m.getDuration());//设置SeekBar的长度try {m.prepare();//准备} catch (IllegalStateException e) {// TODO Auto-generated catch blocke.printStackTrace();} catch (IOException e) {// TODO Auto-generated catch blocke.printStackTrace();}m.start();//播放}else if(v==btn_stop_audio || v==btn_stop_video){m.stop();}else if(v==btn_start_video){m.reset();//恢复到未初始化的状态m=MediaPlayer.create(testMedia.this, R.raw.test);//读取视频skb_video.setMax(m.getDuration());//设置SeekBar的长度m.setAudioStreamType(AudioManager.STREAM_MUSIC);m.setDisplay(surfaceHolder);//设置屏幕try {    m.prepare();    } catch (IllegalArgumentException e) {// TODO Auto-generated catch blocke.printStackTrace();} catch (IllegalStateException e) {// TODO Auto-generated catch blocke.printStackTrace();} catch (IOException e) {// TODO Auto-generated catch blocke.printStackTrace();}m.start();}}  }    /**   * SeekBar进度改变事件   */  class SeekBarChangeEvent implements SeekBar.OnSeekBarChangeListener{@Overridepublic void onProgressChanged(SeekBar seekBar, int progress,boolean fromUser) {// TODO Auto-generated method stub}@Overridepublic void onStartTrackingTouch(SeekBar seekBar) {    isChanging=true;}@Overridepublic void onStopTrackingTouch(SeekBar seekBar) {m.seekTo(seekBar.getProgress());    isChanging=false;}    }}