我正在编写一个Android应用，可播放两张图片（显示10秒）和视频。我使用了带有VideoView和ImageView的布局。下面的布局XML：
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent"
android:layout_height="match_parent" android:background="#0099cc"
tools:context="nahtlos.de.lackmannvideo.VideoActivity">
<VideoView
android:layout_width="match_parent"
android:layout_height="match_parent"
android:keepScreenOn="true"
android:id="@+id/mediaView" />
<ImageView
android:layout_width="match_parent"
android:layout_height="match_parent"
android:keepScreenOn="true"
android:id="@+id/imageView" />
</RelativeLayout>
但是，我在设备上打开一个文件夹并循环播放媒体。因此，mediaList包含目录文件的路径。我为此任务使用单独的线程。请参阅以下代码：
public class MediaControlThread extends Thread {
public static List<String> mediaList = new ArrayList<String>();
private VideoView mediaView;
private ImageView imageView;
MyPhotoActivity activity;
private int currentVideo = 0;
public MediaControlThread(MyPhotoActivity activity, VideoView mediaView, ImageView imageView) {
this.mediaView = mediaView;
this.imageView = imageView;
this.activity = activity;
}
@Override
public void run() {
try {
while(mediaList.size() == 0) {
Thread.sleep(1000);
}
Thread.sleep(3000);
} catch (InterruptedException e) {
e.printStackTrace();
}
playMedia(mediaList.get(0));
}
private void completePlaying() {
currentVideo++;
if (currentVideo > mediaList.size() - 1) {
currentVideo = 0;
}
final MediaControlThread me = this;
activity.runOnUiThread(new Runnable() {
@Override
public void run() {
imageView.setVisibility(View.INVISIBLE);
mediaView.setVisibility(View.INVISIBLE);
}
});
Thread waitThread = new Thread(new Runnable() {
@Override
public void run() {
try {
Thread.sleep(200);
} catch (InterruptedException e) {
e.printStackTrace();
}
}
});
waitThread.start();
try {
waitThread.join();
} catch (InterruptedException e) {
e.printStackTrace();
}
playMedia(mediaList.get(currentVideo));
}
private void playMedia(final String mediaPath) {
try {
if (checkFileForImage(mediaPath)) {
final MediaControlThread me = this;
final Bitmap bm = BitmapFactory.decodeFile(mediaPath);
activity.runOnUiThread(new Runnable() {
@Override
public void run() {
me.imageView.setVisibility(View.VISIBLE);
me.imageView.setImageBitmap(bm);
}
});
Thread waitThread = new Thread(new Runnable() {
@Override
public void run() {
try {
Thread.sleep(AppSettings.secondsToShowPicture * 1000);
} catch (InterruptedException e) {
e.printStackTrace();
}
}
});
waitThread.start();
waitThread.join();
if(bm != null) {
bm.recycle();
}
completePlaying();
} else {
final MediaControlThread me = this;
activity.runOnUiThread(new Runnable() {
@Override
public void run() {
me.mediaView.setVisibility(View.VISIBLE);
me.mediaView.setVideoPath(mediaPath);
me.mediaView.start();
}
});
if(!mediaView.isPlaying()) {
while (!mediaView.isPlaying()) {
Thread.sleep(100);
}
}
while(mediaView.isPlaying()) {
Thread.sleep(100);
}
activity.runOnUiThread(new Runnable() {
@Override
public void run() {
me.mediaView.stopPlayback();
me.mediaView.suspend();
me.mediaView.destroyDrawingCache();
}
});
completePlaying();
}
} catch (IllegalArgumentException e) {
Log.d("MyMediaPlayerControl", e.getMessage());
} catch (IllegalStateException e) {
Log.d("MyMediaPlayerControl", e.getMessage());
} catch (InterruptedException e) {
e.printStackTrace();
}
}
private boolean checkFileForImage(String fileName) {
String file = fileName.toLowerCase();
return file.endsWith(".jpg") ||
file.endsWith(".img") ||
file.endsWith(".bmp") ||
file.endsWith(".jpeg") ||
file.endsWith(".ico") ||
file.endsWith(".tif");
}
}
一开始一切正常，但大约5分钟后我得到一个OutOfMemoryException：
10-23 14:20:46.417 379-379/xxx E/IMGSRV: :0: PVRDRMOpen: TP3, ret = 50
10-23 14:20:46.427 379-379/xxx E/IMGSRV: :0: PVRDRMOpen: TP3, ret = 53
10-23 14:20:46.427 379-379/xxx E/IMGSRV: :0: PVRDRMOpen: TP3, ret = 54
10-23 14:20:46.427 379-379/xxx E/IMGSRV: :0: PVRDRMOpen: TP3, ret = 54
10-23 14:20:46.437 379-379/xxx E/IMGSRV: :0: PVRDRMOpen: TP3, ret = 54
10-23 14:20:46.447 379-379/xxx E/IMGSRV: :0: PVRDRMOpen: TP3, ret = 56
10-23 14:24:23.687 379-716/xxx E/dalvikvm-heap: Out of memory on a 36000016-byte allocation.
10-23 14:24:23.787 379-716/xxx E/AndroidRuntime: FATAL EXCEPTION: Thread-532
10-23 14:24:23.787 379-716/xxx E/AndroidRuntime: Process: xxx, PID: 379
10-23 14:24:23.787 379-716/xxx E/AndroidRuntime: java.lang.OutOfMemoryError
10-23 14:24:23.787 379-716/xxx E/AndroidRuntime: at android.graphics.BitmapFactory.nativeDecodeStream(Native Method)
10-23 14:24:23.787 379-716/xxx E/AndroidRuntime: at android.graphics.BitmapFactory.decodeStreamInternal(BitmapFactory.java:613)
10-23 14:24:23.787 379-716/xxx E/AndroidRuntime: at android.graphics.BitmapFactory.decodeStream(BitmapFactory.java:589)
10-23 14:24:23.787 379-716/xxx E/AndroidRuntime: at android.graphics.BitmapFactory.decodeFile(BitmapFactory.java:369)
10-23 14:24:23.787 379-716/xxx E/AndroidRuntime: at android.graphics.BitmapFactory.decodeFile(BitmapFactory.java:395)
10-23 14:24:23.787 379-716/xxx E/AndroidRuntime: at xxx.MediaControlThread.playMedia(MediaControlThread.java:87)
10-23 14:24:23.787 379-716/xxx E/AndroidRuntime: at xxx.MediaControlThread.completePlaying(MediaControlThread.java:80)
10-23 14:24:23.787 379-716/xxx E/AndroidRuntime: at xxx.MediaControlThread.playMedia(MediaControlThread.java:137)
10-23 14:24:23.787 379-716/xxx E/AndroidRuntime: at xxx.MediaControlThread.completePlaying(MediaControlThread.java:80)
10-23 14:24:23.787 379-716/xxx E/AndroidRuntime: at xxx.MediaControlThread.playMedia(MediaControlThread.java:137)
10-23 14:24:23.787 379-716/xxx E/AndroidRuntime: at xxx.MediaControlThread.completePlaying(MediaControlThread.java:80)
10-23 14:24:23.787 379-716/xxx E/AndroidRuntime: at xxx.MediaControlThread.playMedia(MediaControlThread.java:137)
10-23 14:24:23.787 379-716/xxx E/AndroidRuntime: at xxx.MediaControlThread.completePlaying(MediaControlThread.java:80)
10-23 14:24:23.787 379-716/xxx E/AndroidRuntime: at xxx.MediaControlThread.playMedia(MediaControlThread.java:137)
10-23 14:24:23.787 379-716/xxx E/AndroidRuntime: at xxx.MediaControlThread.completePlaying(MediaControlThread.java:80)
10-23 14:24:23.787 379-716/xxx E/AndroidRuntime: at xxx.MediaControlThread.playMedia(MediaControlThread.java:137)
10-23 14:24:23.787 379-716/xxx E/AndroidRuntime: at xxx.MediaControlThread.completePlaying(MediaControlThread.java:80)
10-23 14:24:23.787 379-716/xxx E/AndroidRuntime: at xxx.MediaControlThread.playMedia(MediaControlThread.java:137)
10-23 14:24:23.787 379-716/xxx E/AndroidRuntime: at xxx.MediaControlThread.completePlaying(MediaControlThread.java:80)
10-23 14:24:23.787 379-716/xxx E/AndroidRuntime: at xxx.MediaControlThread.playMedia(MediaControlThread.java:137)
10-23 14:24:23.787 379-716/xxx E/AndroidRuntime: at xxx.MediaControlThread.completePlaying(MediaControlThread.java:80)
10-23 14:24:23.787 379-716/xxx E/AndroidRuntime: at xxx.MediaControlThread.playMedia(MediaControlThread.java:137)
10-23 14:24:23.787 379-716/xxx E/AndroidRuntime: at xxx.MediaControlThread.completePlaying(MediaControlThread.java:80)
10-23 14:24:23.787 379-716/xxx E/AndroidRuntime: at xxx.MediaControlThread.playMedia(MediaControlThread.java:137)
10-23 14:24:23.787 379-716/xxx E/AndroidRuntime: at xxx.MediaControlThread.completePlaying(MediaControlThread.java:80)
10-23 14:24:23.787 379-716/xxx E/AndroidRuntime: at xxx.MediaControlThread.playMedia(MediaControlThread.java:137)
10-23 14:24:23.787 379-716/xxx E/AndroidRuntime: at xxx.MediaControlThread.completePlaying(MediaControlThread.java:80)
10-23 14:24:23.787 379-716/xxx E/AndroidRuntime: at xxx.MediaControlThread.playMedia(MediaControlThread.java:137)
10-23 14:24:23.787 379-716/xxx E/AndroidRuntime: at xxx.MediaControlThread.completePlaying(MediaControlThread.java:80)
10-23 14:24:23.787 379-716/xxx E/AndroidRuntime: at xxx.MediaControlThread.playMedia(MediaControlThread.java:137)
10-23 14:24:23.787 379-716/xxx E/AndroidRuntime: at xxx.MediaControlThread.completePlaying(MediaControlThread.java:80)
10-23 14:24:23.787 379-716/xxx E/AndroidRuntime: at xxx.MediaControlThread.playMedia(MediaControlThread.java:137)
10-23 14:24:23.787 379-716/xxx E/AndroidRuntime: at xxx.MediaControlThread.completePlaying(MediaControlThread.java:80)
10-23 14:24:23.787 379-716/xxx E/AndroidRuntime: at xxx.MediaControlThread.playMedia(MediaControlThread.java:137)
10-23 14:24:23.787 379-716/xxx E/AndroidRuntime: at xxx.MediaControlThread.completePlaying(MediaControlThread.java:80)
10-23 14:24:23.787 379-716/xxx E/AndroidRuntime: at xxx.MediaControlThread.playMedia(MediaControlThread.java:137)
10-23 14:24:23.787 379-716/xxx E/AndroidRuntime: at xxx.MediaControlThread.completePlaying(MediaControlThread.java:80)
10-23 14:24:23.787 379-716/xxx E/AndroidRuntime: at xxx.MediaControlThread.playMedia(MediaControlThread.java:137)
10-23 14:24:23.787 379-716/xxx E/AndroidRuntime: at xxx.MediaControlThread.comple
任何人都可以提供线索吗？我正试图实现这个图像和视频查看器几天！谢谢！
答案 0 :(得分：0)
Android SurfaceView: Show Video after Images
不幸的是，这是预期的行为。由于Android中的怪癖，一旦你在带有画布的Surface上绘制，你就无法做任何其他事情。 [...]