相机应用程序停止启动它的活动，所以mediastore.extra_output为空？

Question

public void startCamera(View view) {
    Log.i(TAG, "starting Camera action");
    Intent takePictureIntent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
    mImageCaptureUri = getOutputMediaFileUri(MEDIA_TYPE_IMAGE);
    Log.d(TAG, "created media file uri is " + mImageCaptureUri);
    takePictureIntent.putExtra(MediaStore.EXTRA_OUTPUT, mImageCaptureUri);
    startActivityForResult(takePictureIntent, TAKE_PICTURE);

}

        case TAKE_PICTURE:
            if (resultCode == ActionActivity.RESULT_OK) {
                Log.d(TAG, "received ok from camera intent, working on picture now. Saved image path is :" + mImageCaptureUri);
                b = new Bundle();

                if (mImageCaptureUri != null){
                    Intent i = new Intent();
                    b.putSerializable("picUri", mImageCaptureUri.getPath());
                    i.putExtras(b);
                    i.setClass(this, AttachCommentActivity.class);
                    startActivity(i);
                }
                else{
                    Log.e(TAG, "error while processing camera result, there is no picture uri, going back to previous view");
                    startActivity(new Intent().setClass(this, ActionActivity.class));
                }
            }

下面是日志输出

  07-01 11:39:49.224    5614-5614/de.myapp I/AttachActivity﹕ starting Camera action
  07-01 11:39:49.234    5614-5614/de.myapp D/AttachActivity﹕ created media file uri is file:///storage/emulated/0/Pictures/pdixattach/IMG_20150701_113949.jpg
  07-01 11:39:49.264    5614-5614/de.myapp D/AttachActivity﹕ activity has been paused!
  07-01 11:39:52.144    5614-5614/de.myapp D/AttachActivity﹕ activity has been stopped!
  07-01 11:40:03.514    5614-5614/de.myapp E/ActivityThread﹕ Performing stop of activity that is not resumed: {de.myapp/de.myapp.activies.AttachActivity}
      java.lang.RuntimeException: Performing stop of activity that is not resumed: {de.myapp/de.myapp.activies.AttachActivity}
              at android.app.ActivityThread.performStopActivityInner(ActivityThread.java:3816)
              at android.app.ActivityThread.handleStopActivity(ActivityThread.java:3904)
              at android.app.ActivityThread.access$1200(ActivityThread.java:177)
              at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1477)
              at android.os.Handler.dispatchMessage(Handler.java:102)
              at android.os.Looper.loop(Looper.java:145)
              at android.app.ActivityThread.main(ActivityThread.java:5938)
              at java.lang.reflect.Method.invoke(Native Method)
              at java.lang.reflect.Method.invoke(Method.java:372)
              at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1400)
              at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1195)
  07-01 11:40:02.984    5614-5614/de.myapp D/AttachActivity﹕ activity has been created!
  07-01 11:40:03.014    5614-5614/de.myapp D/AttachActivity﹕ request code in onActivityResult is  100
  07-01 11:40:03.014    5614-5614/de.myapp D/AttachActivity﹕ received ok from camera intent, working on picture now. Saved image path is :null
  07-01 11:40:03.014    5614-5614/de.myapp E/AttachActivity﹕ error while processing camera result, there is no picture uri, going back to previous view

Answer 1

我可以在日志文件中看到，在相机应用程序处于前台期间，activty已经停止，这就解释了为什么mImageCaptureUri是空的。

由于内存不足，进程被终止。在调用第三方相机应用程序时，这种情况经常发生。

但我该如何预防呢？