拍照然后显示

Question

我正在尝试构建一个应用程序，当按下某个按钮时，会启动相机意图，然后用户拍摄一张照片，然后显示在我的应用中。我遇到的问题是onActivityResult resultCode为-1，意图为空。我已将代码设置为this sample from google

我的代码如下所示：

private static final int CAMERA_PIC_REQUEST = 1337;
private String mCurrentPhotoPath;

public void cameraClick(View view){
    Intent cameraIntent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);

    if(cameraIntent.resolveActivity(getPackageManager()) != null){
        File photo = null;
        try{
            photo = createImageFile();
        }
        catch (IOException e){
            e.printStackTrace();
        }

        if(photo != null){
            //cameraIntent.putExtra(MediaStore.EXTRA_OUTPUT, Uri.fromFile(photo));
            startActivityForResult(cameraIntent, CAMERA_PIC_REQUEST);
        }
    }


}

private File createImageFile() throws IOException {
    String timeStamp = new SimpleDateFormat("yyyyMMdd_HHmmss").format(new Date());
    String imageFileName = "JPEG_" + timeStamp + "_";
    File storageDir = Environment.getExternalStoragePublicDirectory(
            Environment.DIRECTORY_PICTURES);
    File image = File.createTempFile(
            imageFileName,  /* prefix */
            ".jpg",         /* suffix */
            storageDir      /* directory */
    );

    // Save a file: path for use with ACTION_VIEW intents
    mCurrentPhotoPath = "file:" + image.getAbsolutePath();
    return image;

}

@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data){
   if(requestCode == CAMERA_PIC_REQUEST && resultCode == RESULT_OK && data != null && data.getData() != null){
     //do image setting here
   }
}