意图附加返回空

Question

我从girdview适配器类调用startActivityForResult事件。Gridview适配器类是由myFragment类创建的。intent extras始终返回null onActivityResult事件。你认为错误在哪里？谢了。

我的gridview适配器类；

 public class MyAdapter extends ArrayAdapter<MyInfo> {

@Override
public View getView(int position, View convertView, ViewGroup parent) {

    View view = convertView;

    if (view == null) {

        LayoutInflater inflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
        view = inflater.inflate(layoutResourceID, null);

    }

    ImageButton btnImage = (ImageButton) view.findViewById(R.id.btnImage);

        @Override
        public boolean onLongClick(View v) {

            Intent intentCamera = new Intent(android.provider.MediaStore.ACTION_IMAGE_CAPTURE);

            intentCamera.putExtra("Asd", "Asd");

            MyFragment.startActivityForResult(intentCamera, 1);

            return true;
        }
    });
  }

onActivityResult事件的MyFragment类

public class MyFragment extends Fragment {

    @Override
    public void onActivityResult(int requestCode, int resultCode, Intent data) {

    super.onActivityResult(requestCode, resultCode, data);

    ImageButton btn = (ImageButton) getActivity().findViewById(R.id.btnImage);

    switch (requestCode) {
    case 1:

        Bitmap photo = (Bitmap) data.getExtras().get("data");

         //photo is OK

        Bundle bundle = data.getExtras();

        if (bundle.getString("Asd") != null) {

            //bundle.getString("Asd")  NULL                         }

        if (data.hasExtra("Asd")) {

            //data.hasExtra("Asd") false
        }


        break;

    default:
        break;
    }

}
}

Answer 1

您的自定义字符串“asd”不会被相机应用程序返回-这不是它的工作方式。

您可以期望将照片图像返回给您，也可以期望将图像文件返回给您。

如果你只是问“ASD”，那么这就是你的答案--你不会得到它。如果你问为什么没有图片回来，那么继续阅读。

private static final int CAPTURE_IMAGE_ACTIVITY_REQUEST_CODE = 100;
private Uri fileUri;

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

    // create Intent to take a picture and return control to the calling application
    Intent intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);

    fileUri = getOutputMediaFileUri(MEDIA_TYPE_IMAGE); // create a file to save the image
    intent.putExtra(MediaStore.EXTRA_OUTPUT, fileUri); // set the image file name

    // start the image capture Intent
    startActivityForResult(intent, CAPTURE_IMAGE_ACTIVITY_REQUEST_CODE);
}

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