Android: Camera stops onActivityResult

Question

I am trying to build a Camera app.

This is the code of MainActivity:

public class MainActivity extends Activity {

    public static int CAMERA_REQUEST_KEY = 100;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        Intent intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
        startActivityForResult(intent, CAMERA_REQUEST_KEY);
    }

    @Override
    protected void onActivityResult(int requestCode, int resultCode, Intent data) {
        super.onActivityResult(requestCode, resultCode, data);
        if (requestCode == CAMERA_REQUEST_KEY) {
            if (resultCode == RESULT_OK) {
                Bundle bundle = data.getExtras();
                Bitmap bmp = (Bitmap) bundle.get("data");
                ImageView iv = (ImageView) findViewById(R.id.image_frame);
                iv.setImageBitmap(bmp);
            } else {
                Toast.makeText(getApplicationContext(), "Operation Failed", Toast.LENGTH_LONG).show();
            }
        }
    }
}

After I Capture an image I get this message:
"Unfortunately,Camera tutorial has stopped"; Log cat says

11-13 21:23:00.107: E/AndroidRuntime(17967): java.lang.RuntimeException: Unable to resume activity {com.example.cameratutorial/com.example.cameratutorial.MainActivity}: java.lang.RuntimeException: Failure delivering result ResultInfo{who=null, request=100, result=-1, data=Intent { act=inline-data dat=content://media/external/images/media/20787 typ=image/jpeg (has extras) }} to activity {com.example.cameratutorial/com.example.cameratutorial.MainActivity}: java.lang.NullPointerException

What is the problem?

Answer 1

You do not have

  setContentView(R.layout.mylayout);

So

  ImageView iv = (ImageView) findViewById(R.id.image_frame);// fails

findViewById looks for a view with the id mentioned in the current inflateed layout. So you need to set the content of the layout to the activity first and then initialize views.

ImageView iv;
@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.mylayout);
    iv = (ImageView) findViewById(R.id.image_frame);
    Intent intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
    startActivityForResult(intent, CAMERA_REQUEST_KEY);
}

Make sure you have the required permission in manifest file

http://developer.android.com/reference/android/hardware/Camera.html

http://developer.android.com/guide/topics/media/camera.html