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POAndroid Camera preview zoom using double finger touch
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copied!<p>I am trying to do zoom using double finger touch gesture in the camera preview mode. But i unable to do that. I have done that Zoom control on the ImageView and it's working fine. Now i want to do that in the camera preview mode i.e. when we start the camera we can able to do zooming using double finger gesture.</p> <p>Below i an adding the code for double finger gesture for zooming the image.</p> <pre><code>@Override public boolean onTouch(View v, MotionEvent event) { // TODO Auto-generated method stub ImageView view = (ImageView) v; switch (event.getAction() & MotionEvent.ACTION_MASK) { case MotionEvent.ACTION_DOWN: savedMatrix.set(matrix); start.set(event.getX(), event.getY()); Log.d(TAG, "mode=DRAG"); mode = DRAG; break; case MotionEvent.ACTION_POINTER_DOWN: oldDist = spacing(event); Log.d(TAG, "oldDist=" + oldDist); if (oldDist > 10f) { savedMatrix.set(matrix); midPoint(mid, event); mode = ZOOM; Log.d(TAG, "mode=ZOOM"); } break; case MotionEvent.ACTION_UP: case MotionEvent.ACTION_POINTER_UP: mode = NONE; Log.d(TAG, "mode=NONE"); break; case MotionEvent.ACTION_MOVE: if (mode == DRAG) { // for draging the image matrix.set(savedMatrix); matrix.postTranslate(event.getX() - start.x, event.getY() - start.y); break; } else if (mode == ZOOM) { float newDist = spacing(event); Log.d(TAG, "newDist=" + newDist); if (newDist > 10f) { matrix.set(savedMatrix); float scale = newDist / oldDist; matrix.postScale(scale, scale, mid.x, mid.y); } } break; } view.setImageMatrix(matrix); return true; } </code></pre> <p>Please guide me how to do this gesture zoom control in camera preview. atleast provide a tutorial link.</p> <p>With Thanks Vikash</p>

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