当我尝试从相机我得到空拍摄的照片得到URI [英] When i try to get the Uri from a picture taken with the camera i get null

问题描述

下面是我的问题，当我尝试从我拿白衣相机我得到空与相机上仿真器和我的设备的画面得到URI，但只有白衣系统相机，如果我用另一个摄像头的应用程序，总是作品。这里是我的code

here is my problem, when i try to get the Uri from the picture that I take whit the camera i get null with the camera on emulator and my device, but only whit the system camera if I use another camera app, always works. Here is my code

有关启动相机应用

takePic.setOnClickListener(new OnClickListener() {
   @Override
   public void onClick(View v) {
    Intent intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE); 
    String captured_image = System.currentTimeMillis() + ".jpg";
    File file = new File(Environment.getExternalStorageDirectory(), captured_image); 
    captured_image = file.getAbsolutePath();
    outputFileUri = Uri.fromFile(file); 
    intent.putExtra(MediaStore.EXTRA_OUTPUT, outputFileUri); 
    intent.putExtra("return-data", true);
    startActivityForResult(intent, CAMERA_REQUEST);
   }
});

为获得图像

protected void onActivityResult(int requestCode, int resultCode, Intent data) {  
  if (requestCode == CAMERA_REQUEST) { 
    ContentResolver cr = getContentResolver();
    InputStream in = null;
    try 
    {
        in = cr.openInputStream(outputFileUri); 
    } 
    catch (FileNotFoundException e) 
    {
        e.printStackTrace();
    }
  }
}

outputFileUri总是空活动时的回报。
谢谢你。

outputFileUri always have null when the activity returns. Thanks.

推荐答案

Android的可能已经杀死了（并重新启动）您的活动你进入的onActivityResult 之前，例如由于而拍摄照片，你旋转你的设备。尝试存储和恢复 outputFileUri 的活动状态的其余...

Android might have killed off (and restarted) your activity before you get into onActivityResult, for instance because you rotated your device while taking the picture. Try to store and restore outputFileUri with the rest of the Activity state...

protected void onSaveInstanceState(Bundle outState)
{
    outState.putParcelable("outputFileUri", outputFileUri);
}

...

public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.main);

    if (savedInstanceState != null)
    {
        outputFileUri= savedInstanceState.getParcelable("outputFileUri");
    }
}

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