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POWhy will same GestureEvent code work on android 2.3.5 but not on 4.0.3
 

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  1. POWhy will same GestureEvent code work on android 2.3.5 but not on 4.0.3
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    <p>This code will work on a phone with 2.3.5 but not on a tablet with 4.0.3:</p> <pre><code>@Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); this.requestWindowFeature(Window.FEATURE_NO_TITLE); this.setContentView(R.layout.rotate_image); mRotator = (ImageView) findViewById(R.id.rotateImage_image_rotator); mGDetector = new GestureDetector(getApplicationContext(), this); findViewById(R.id.rotateImage_background).setOnTouchListener(new OnTouchListener() { @Override public boolean onTouch(View v, MotionEvent event) { return mGDetector.onTouchEvent(event); } }); } @Override public boolean onDown(MotionEvent e) { // TODO Auto-generated method stub return true; } @Override public boolean onFling(MotionEvent start, MotionEvent finish, float velocityX, float velocityY) { return false; } @Override public void onLongPress(MotionEvent e) { // TODO Auto-generated method stub } @Override public boolean onScroll(MotionEvent e1, MotionEvent e2, float distanceX, float distanceY) { if(e2.getHistorySize() == 0){ } else{ if(e2.getX() &gt; e2.getHistoricalX(e2.getHistorySize() -1)){ updateRotation(true); } else{ updateRotation(false); } } return true; } @Override public void onShowPress(MotionEvent e) { // TODO Auto-generated method stub } @Override public boolean onSingleTapUp(MotionEvent e) { // TODO Auto-generated method stub return false; } </code></pre> <p>Is there some kind of bug that tablets have or something? I mean, its the same code, it works perfectly on the phone, but it wont register on the tablet. Is it becaose of the android version, or because it is a tablet?</p> <p>EDIT: To be more specific, for some reason, the function onScroll does not get called on a tablet or gets called only once, but works like a charm on a phone</p>
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    1. COWhat exactly doesn't work? As far as I see the only function is in `onScroll` the `updateRotation`?! Be aware that to get `getHistorySize` a *very* fast motion might be needed, maybe that's the problem on the tablet (if so use a log output here).
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    2. COsorry, i should have been clearer. For some reason, on a tablet, the onScroll function does not get called or it gets called only once, while on the phone it works like a charm
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    3. COturns out, the problem was with getHistorySize
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