标签：
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。标签：MediaPlayer SurfaceView Android SDK
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<?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> |
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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(){
@Override
public 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{ @Override public
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 block
e.printStackTrace();
} catch
(IOException e) {
// TODO Auto-generated catch block
e.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 block
e.printStackTrace();
} catch
(IllegalStateException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch
(IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
m.start();
} }
}
/**
* SeekBar进度改变事件
*/ class
SeekBarChangeEvent implements
SeekBar.OnSeekBarChangeListener{ @Override public
void onProgressChanged(SeekBar seekBar,
int progress,
boolean fromUser) {
// TODO Auto-generated method stub }
@Override public
void onStartTrackingTouch(SeekBar seekBar) {
isChanging=true;
}
@Override public
void onStopTrackingTouch(SeekBar seekBar) {
m.seekTo(seekBar.getProgress());
isChanging=false;
}
}
} |
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原文地址：http://blog.csdn.net/u014311037/article/details/42268865
