VideoView可以正常播放，但在交换全屏视图时不可见 [英] VideoView plays ok, but not visible when swapping fullscreen views

问题描述

我有一些AsyncTask可以将视频流加载到播放器中，因此我想在执行过程中显示一些加载"屏幕.目前，我的onCreate代码如下所示:

I have some AsyncTask that loads a video stream into the player, so I want to show some Loading screen while it performs. Currently my onCreate code looks like this:

final View loadingView = getLayoutInflater().inflate(R.layout.video_loading, null);
final View playerView = getLayoutInflater().inflate(R.layout.player, null);
final VideoView videoView = (VideoView) playerView.findViewById(R.id.canvas);

Log.d(TAG, "Running video player for video " + videoId);

new VideoPlayingTask(this, videoView.getHolder()) {

    protected void onPreExecute() {
        setContentView(loadingView);
        super.onPreExecute(); // it creates or re-uses (resetting it before)
                            // MediaPlayer instance inside and sets display using setDisplay to the passed holder
    };

    protected void onPostExecute(FileInputStream dataSource) {

        setContentView(playerView);
        videoView.requestFocus();
        super.onPostExecute(dataSource); // it sets data source, 
                                        // prepares player and starts it
    };

 }.execute(videoId);

loadingView正确显示，然后将内容更改为playerView时，屏幕变黑，但声音在背景中正常播放.

loadingView is displayed properly, then when changing content to playerView, screen goes black, but sound plays properly in background.

我从MediaPlayer的日志中收到了这两个警告:

I get these two warnings from MediaPlayer in the logs:

info/warning (1, 35)
info/warning (1, 44)

我尝试使用ViewSwither并在onPostExecute内调用showNextView，但是行为类似，更改为videoView时出现黑屏.

I've tried to use ViewSwither and to call showNextView inside onPostExecute, but the behavior was similar, black screen when changing to videoView.

我尝试了两种方法，即在电流内部放置两个内部布局，并手动切换其可见性，这对我也没有帮助.

I've tried the way with two inner layouts laying inside current and switch their visibility manually, and this also not helped to me.

当我在此活动中仅使用单个VideoView时，它可以完美运行并同时显示图像和声音.

When I use just single VideoView in this activity, it works perfectly and shows both image and sound.

video_loading.xml:

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
              android:layout_width="fill_parent"
              android:layout_height="fill_parent"               
              android:gravity="center">
    <ProgressBar android:layout_width="@dimen/small_progress_side"
                 android:layout_height="@dimen/small_progress_side" />
    <TextView android:layout_width="wrap_content"
              android:layout_height="wrap_content"
              android:layout_marginLeft="5dp"
              android:text="@string/caching_video" />
</LinearLayout>

player.xml:

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
              android:layout_width="fill_parent"
              android:layout_height="fill_parent">
    <VideoView android:id="@+id/canvas"
               android:layout_width="fill_parent"
               android:layout_height="fill_parent" />
</LinearLayout> 

此问题似乎有点相似，但将loadingView可见性切换为INVISIBLE不适用于我的情况.

this question seems a little bit similar, but switching loadingView visibility to INVISIBLE does not work in my case.

推荐答案

我只是使用ProgressDialog.show()而不是翻转视图，这要简单得多，并且VideoView可以正确处理它.

I've just used ProgressDialog.show() instead of flipping views, it is a lot simpler and VideoView handles it right.

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