in RuntimePermissionsBasic/Application/src/main/java/com/example/android/basicpermissions/camera/CameraPreview.java [103:112]
public void surfaceCreated(SurfaceHolder holder) {
// The Surface has been created, now tell the camera where to draw the preview.
try {
mCamera.setPreviewDisplay(holder);
mCamera.startPreview();
Log.d(TAG, "Camera preview started.");
} catch (IOException e) {
Log.d(TAG, "Error setting camera preview: " + e.getMessage());
}
}