packagecn.itcast.videoplayer;
importjava.io.File;
importandroid.app.Activity;
importandroid.media.MediaPlayer;
importandroid.media.MediaPlayer.OnPreparedListener;
importandroid.os.Bundle;
importandroid.os.Environment;
importandroid.view.SurfaceHolder;
importandroid.view.SurfaceHolder.Callback;
importandroid.view.SurfaceView;
importandroid.view.View;
importandroid.widget.EditText;
importandroid.widget.Toast;
publicclassMainActivity extendsActivity {
privateEditText nameText;
privateString path;
privateMediaPlayer mediaPlayer;
privateSurfaceView surfaceView;
privatebooleanpause;
privateintposition;
@Override
publicvoidonCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
mediaPlayer = newMediaPlayer();
nameText = (EditText) this.findViewById(R.id.filename);
surfaceView = (SurfaceView) this.findViewById(R.id.surfaceView);
//把输送给surfaceView的视频画面，直接显示到屏幕上,不要维持它自身的缓冲区
surfaceView.getHolder().setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);
surfaceView.getHolder().setFixedSize(176, 144);
surfaceView.getHolder().setKeepScreenOn(true);
surfaceView.getHolder().addCallback(newSurfaceCallback());
}
privatefinalclassSurfaceCallback implementsCallback{
publicvoidsurfaceChanged(SurfaceHolder holder, intformat, intwidth, intheight) {
}
publicvoidsurfaceCreated(SurfaceHolder holder) {
if(position>0&& path!=null){
play(position);
position = 0;
}
}
publicvoidsurfaceDestroyed(SurfaceHolder holder) {
if(mediaPlayer.isPlaying()){
position = mediaPlayer.getCurrentPosition();
mediaPlayer.stop();
}
}
}
@Override
protectedvoidonDestroy() {
mediaPlayer.release();
mediaPlayer = null;
super.onDestroy();
}
publicvoidmediaplay(View v){
switch(v.getId()) {
caseR.id.playbutton:
String filename = nameText.getText().toString();
if(filename.startsWith("http")){
path = filename;
play(0);
}else{
File file = newFile(Environment.getExternalStorageDirectory(), filename);
if(file.exists()){
path = file.getAbsolutePath();
play(0);
}else{
path = null;
Toast.makeText(this, R.string.filenoexsit, 1).show();
}
}
break;
caseR.id.pausebutton:
if(mediaPlayer.isPlaying()){
mediaPlayer.pause();
pause = true;
}else{
if(pause){
mediaPlayer.start();
pause = false;
}
}
break;
caseR.id.resetbutton:
if(mediaPlayer.isPlaying()){
mediaPlayer.seekTo(0);
}else{
if(path!=null){
play(0);
}
}
break;
caseR.id.stopbutton:
if(mediaPlayer.isPlaying()){
mediaPlayer.stop();
}
break;
}
}
privatevoidplay(intposition) {
try{
mediaPlayer.reset();
mediaPlayer.setDataSource(path);
mediaPlayer.setDisplay(surfaceView.getHolder());
mediaPlayer.prepare();//缓冲
mediaPlayer.setOnPreparedListener(newPrepareListener(position));
} catch(Exception e) {
e.printStackTrace();
}
}
privatefinalclassPrepareListener implementsOnPreparedListener{
privateintposition;
publicPrepareListener(intposition) {
this.position = position;
}
publicvoidonPrepared(MediaPlayer mp) {
mediaPlayer.start();//播放视频
if(position>0) mediaPlayer.seekTo(position);
}
}
}