android samples: force setVisibility (see #5812)

samples/android/15-puzzle/src/org/opencv/samples/puzzle15/Puzzle15Activity.java

@@ -59,6 +59,7 @@ public class Puzzle15Activity extends Activity implements CvCameraViewListener,
         Log.d(TAG, "Creating and setting view");
         mOpenCvCameraView = (CameraBridgeViewBase) new JavaCameraView(this, -1);
         setContentView(mOpenCvCameraView);
+        mOpenCvCameraView.setVisibility(CameraBridgeViewBase.VISIBLE);
         mOpenCvCameraView.setCvCameraViewListener(this);
         mPuzzle15 = new Puzzle15Processor();
         mPuzzle15.prepareNewGame();

samples/android/face-detection/src/org/opencv/samples/facedetect/FdActivity.java

@@ -125,6 +125,7 @@ public class FdActivity extends Activity implements CvCameraViewListener2 {
         setContentView(R.layout.face_detect_surface_view);
 
         mOpenCvCameraView = (CameraBridgeViewBase) findViewById(R.id.fd_activity_surface_view);
+        mOpenCvCameraView.setVisibility(CameraBridgeViewBase.VISIBLE);
         mOpenCvCameraView.setCvCameraViewListener(this);
     }
 

samples/android/image-manipulations/src/org/opencv/samples/imagemanipulations/ImageManipulationsActivity.java

@@ -96,6 +96,7 @@ public class ImageManipulationsActivity extends Activity implements CvCameraView
         setContentView(R.layout.image_manipulations_surface_view);
 
         mOpenCvCameraView = (CameraBridgeViewBase) findViewById(R.id.image_manipulations_activity_surface_view);
+        mOpenCvCameraView.setVisibility(CameraBridgeViewBase.VISIBLE);
         mOpenCvCameraView.setCvCameraViewListener(this);
     }
 

samples/android/tutorial-2-mixedprocessing/src/org/opencv/samples/tutorial2/Tutorial2Activity.java

@@ -72,6 +72,7 @@ public class Tutorial2Activity extends Activity implements CvCameraViewListener2
         setContentView(R.layout.tutorial2_surface_view);
 
         mOpenCvCameraView = (CameraBridgeViewBase) findViewById(R.id.tutorial2_activity_surface_view);
+        mOpenCvCameraView.setVisibility(CameraBridgeViewBase.VISIBLE);
         mOpenCvCameraView.setCvCameraViewListener(this);
     }