private void unbindDrawables(View view) {
if (view != null && view.getBackground() != null) {
view.getBackground().setCallback(null);
}
if (view instanceof ViewGroup && !(view instanceof AdapterView)) {
for (int i = 0; i < ((ViewGroup) view).getChildCount(); i++) {
unbindDrawables(((ViewGroup) view).getChildAt(i));
}
((ViewGroup) view).removeAllViews();
}
}
@Override
protected void onDestroy() {
if (mOrientationHelper != null) {
mOrientationHelper.disable();
mOrientationHelper = null;
}
LinphoneCore lc = LinphoneManager.getLcIfManagerNotDestroyedOrNull();
if (lc != null) {
lc.removeListener(mListener);
}
instance = null;
super.onDestroy();
unbindDrawables(findViewById(R.id.topLayout));
System.gc();
}