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android - 如何使用 videoview 流畅地播放来自 url 的视频?

转载 作者:太空狗 更新时间:2023-10-29 13:29:32 27 4
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我有一个包含 VideoView 的 Activity 。它正在播放来自 url 的视频。我正在做的是为了播放流畅,我在 Activity 开始时放了一个 ProgressDialog。并在 onPreparedListener 中关闭它,以便它可以流畅地播放。但它仍然没有帮助。视频正在播放 10-20 秒,然后停止 5-10 秒,然后继续播放。我在Google play上看到过一个应用Workout Trainer其中,如果用户开始观看视频,它会显示一个水平进度条,它会缓冲视频,然后流畅地播放它,无论是连接速度慢还是 WI-FI。它只需要在开始视频之前完成 progressbar。我想知道如何在我的应用程序中实现相同的功能?

我正在做的如下:

    public class StartExerciseActivity extends Activity {


protected void onCreate(Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onCreate(savedInstanceState);
requestWindowFeature(Window.FEATURE_NO_TITLE);
setContentView(R.layout.show_exercise);
tileTextView = (TextView) findViewById(R.id.titleText);
timerTextView = (TextView) findViewById(R.id.timertxt);
timerRemainTextView = (TextView) findViewById(R.id.timeremaintxt);
videoView = (VideoView) findViewById(R.id.video_view);
stopButton = (Button) findViewById(R.id.stopbut);
pauseButton = (Button) findViewById(R.id.pausesbut);



progressDialog = ProgressDialog.show(StartExerciseActivity.this, "",
"Buffering video...", true);
getWindow().setFormat(PixelFormat.TRANSLUCENT);

tileTextView.setText(Constant.NEWS_TITLE);
timerTextView.setText(Constant.VIDEO_TIME);
video_url = Constant.VIDEO_NAME;




try {

Uri video = Uri.parse(video_url);

// videoView.setMediaController(mediaController);
videoView.setVideoURI(video);

videoView.setOnPreparedListener(new OnPreparedListener() {
public void onPrepared(MediaPlayer mp) {
progressDialog.dismiss();
videoView.start();
updateSeekProgress();


RelativeLayout.LayoutParams videoviewlp = new RelativeLayout.LayoutParams(400, 400);
videoviewlp.addRule(RelativeLayout.CENTER_HORIZONTAL, RelativeLayout.TRUE);
videoviewlp.addRule(RelativeLayout.CENTER_VERTICAL, RelativeLayout.TRUE);
videoView.setLayoutParams(videoviewlp);
videoView.invalidate();


// DisplayMetrics metrics = new DisplayMetrics(); getWindowManager().getDefaultDisplay().getMetrics(metrics);
// android.widget.LinearLayout.LayoutParams params = (android.widget.LinearLayout.LayoutParams) videoView.getLayoutParams();
// params.width = metrics.widthPixels;
// params.height = metrics.heightPixels;
// params.leftMargin = 0;
// videoView.setLayoutParams(params);
}
});

} catch (Exception e) {
progressDialog.dismiss();
System.out.println("Video Play Error :" + e.getMessage());
}
pauseButton.setOnClickListener(new View.OnClickListener() {


public void onClick(View arg0) {
if (count == 0) {
videoView.pause();
count = 1;
pauseButton.setBackgroundResource(R.drawable.playbut);


} else if (count == 1) {
videoView.start();

pauseButton.setBackgroundResource(R.drawable.pausebut);
count = 0;
}
}
});

stopButton.setOnClickListener(new View.OnClickListener() {


public void onClick(View arg0) {
videoView.stopPlayback();
pauseButton.setBackgroundResource(R.drawable.playbut);
}
});

}

请帮忙。谢谢。

最佳答案

//放在oncreate
新的 DownloadXML().execute();
//放在oncreate之外

private class DownloadXML extends AsyncTask<Void, Void, Void> {
@Override
protected void onPreExecute() {
super.onPreExecute();
// Create a progressbar
pDialog = new ProgressDialog(StartExerciseActivity.this);
// Set progressbar title
pDialog.setTitle("Wait");
// Set progressbar message
pDialog.setMessage("Loading...");
pDialog.setIndeterminate(false);
// Show progressbar
pDialog.show();
}

@Override
protected Void doInBackground(Void... params) {
try {
videoView.setVideoURI(Uri.parse("http://commonsware.com/misc/test2.3gp"));
//videoView.setVideoURI(Uri.parse(videofilename));
videoView.requestFocus();
videoView.setMediaController(new MediaController(this));

} catch (Exception e) {
Log.e("Error", e.getMessage());
e.printStackTrace();
}
return null;

}

@Override
protected void onPostExecute(Void args) {

// Close progressbar
pDialog.dismiss();
videoView.start();
}
}

关于android - 如何使用 videoview 流畅地播放来自 url 的视频?,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/17366378/

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