[移动开发]MediaPlayer使用，简直无敌

<SurfaceView

android:id="@+id/surfaceview01"

android:layout_width=“match_parent”

android:layout_height=“200dp” />

<LinearLayout

android:id="@+id/LinearLayout02"

android:layout_width=“wrap_content”

android:layout_height=“wrap_content”>

<Button

android:id="@+id/Button03"

android:layout_width=“wrap_content”

android:layout_height=“wrap_content”

android:text=“播放视频”>

<Button

android:id="@+id/Button04"

android:layout_width=“wrap_content”

android:layout_height=“wrap_content”

android:text=“停止播放”>

MainActivity代码：

public class MainActivity extends AppCompatActivity {

private MediaPlayer mMediaPlayerl;

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

private Button btn_start_audio;

private Button btn_stop_audio;

private SeekBar skb_audio;

private Button btn_start_video;

private Button btn_stop_video;

private SeekBar skb_video;

private SurfaceView mSurfaceView;

private SurfaceHolder mSurfaceHolder;

@Override

protected void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.activity_main);

Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);

setSupportActionBar(toolbar);

init();

}

private void init() {

mMediaPlayerl = new MediaPlayer();

/**

• 播放结束之后提示

*/

mMediaPlayerl.setOnCompletionListener(new MediaPlayer.OnCompletionListener() {

@Override

public void onCompletion(MediaPlayer mp) {

Toast.makeText(MainActivity.this, “结束”, Toast.LENGTH_SHORT).show();

mMediaPlayerl.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 (mMediaPlayerl.isPlaying()){

if (mMediaPlayerl.getVideoHeight() == 0){

skb_audio.setProgress(mMediaPlayerl.getCurrentPosition());

}else{

skb_video.setProgress(mMediaPlayerl.getCurrentPosition());

}

}

}

};

mTimer.schedule(mTimerTask, 0, 10);

btn_start_audio = (Button) this.findViewById(R.id.Button01);

btn_stop_audio = (Button) this.findViewById(R.id.Button02);

skb_audio=(SeekBar)this.findViewById(R.id.SeekBar01);

//设置监听事件

btn_start_audio.setOnClickListener(new ClickEvent());

btn_stop_audio.setOnClickListener(new ClickEvent());

skb_audio.setOnSeekBarChangeListener(new SeekBarChangeEvent());

btn_start_video = (Button) this.findViewById(R.id.Button03);

btn_stop_video = (Button) this.findViewById(R.id.Button04);

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kb_video=(SeekBar)this.findViewById(R.id.SeekBar02);

//设置监听事件

btn_start_video.setOnClickListener(new ClickEvent());

btn_stop_video.setOnClickListener(new ClickEvent());

skb_video.setOnSeekBarChangeListener(new SeekBarChangeEvent());

mSurfaceView = (SurfaceView)findViewById(R.id.surfaceview01);

mSurfaceHolder = mSurfaceView.getHolder();

mSurfaceHolder.setFixedSize(100, 100);

mSurfaceHolder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);

}

/**

• 按键事件处理

*/

class ClickEvent implements View.OnClickListener{

@Override

public void onClick(View v) {

if (v == btn_start_audio){

mMediaPlayerl.reset();//恢复到未初始化的状态

mMediaPlayerl = MediaPlayer.create(MainActivity.this,R.raw.cjyx);//读取音频文件

skb_audio.setMax(mMediaPlayerl.getDuration());//设置Seekbar的长度

try {

mMediaPlayerl.prepare();

} catch (IOException e) {

e.printStackTrace();

} catch (IllegalStateException e) {

e.printStackTrace();

}

mMediaPlayerl.start();

}else if (vbtn_stop_audio || vbtn_stop_video){

mMediaPlayerl.stop();

}else if (v == btn_start_video){

mMediaPlayerl.reset();//恢复到未初始化的状态

mMediaPlayerl =MediaPlayer.create(MainActivity.this,R.raw.cjyx);//读取视频

skb_video.setMax(mMediaPlayerl.getDuration());//设置SeekBar的长度

mMediaPlayerl.setAudioStreamType(AudioManager.STREAM_MUSIC);

mMediaPlayerl.setDisplay(mSurfaceHolder);//设置屏幕

try {

mMediaPlayerl.prepare();

} catch (IOException e) {

e.printStackTrace();

}catch (IllegalStateException e) {

e.printStackTrace();

}

mMediaPlayerl.start();

}

}

}

/**

• 设置SeekBar的进度改变事件

*/

class SeekBarChangeEvent implements SeekBar.OnSeekBarChangeListener{

@Override

public void onProgressChanged(SeekBar seekBar, int progress, boolean fromUser) {

}

@Override