Android多媒体播放功能的代码分析

import android.app.Activity;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.VideoView;
public class VideoPlayer extends Activity {
/** Called when the activity is first created.
*/
@Override
public void onCreate(Bundle icicle) {
super.onCreate(icicle);
setContentView(R.layout.main);
final VideoView w =(VideoView)findViewById(R.id.vdoplayer);
Button cmdload = (Button)this.findViewById(R.id.cmd_load); cmdload.setOnClickListener(new OnClickListener() {
public void onClick(View arg0) {
// TODO Auto-generated method stub
w.setVideoPath("/sdcard/android/kongfu.mp4");
}
}
);
Button cmdplay = (Button)this.findViewById(R.id.cmd_play);
cmdplay.setOnClickListener(new OnClickListener() {
public void onClick(View arg0) {
// TODO Auto-generated method stub
w.start();
}
}
);
Button cmdpause = (Button)this.findViewById(R.id.cmd_pause); cmdpause.setOnClickListener(new OnClickListener() {
public void onClick(View arg0) {
// TODO Auto-generated method stub
w.pause();
}
}
);
}

< ?xml version="1.0" encoding="utf-8"?>
< LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:orientation="vertical"
android:layout_width="fill_parent"
android:layout_height="fill_parent" >
< Button android:id="@+id/cmd_load"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text="load" />
< Button android:id="@+id/cmd_play"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text="Play" />
< Button android:id="@+id/cmd_pause"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text="pause" />
< VideoView android:id="@+id/vdoplayer"
android:layout_width="fill_parent"
android:layout_height="300px" />
< /LinearLayout>