DrawerLayout与toolbar 的联动动画（左上角的icon动画）

ActionbarDrawerToggle动画

mDrawerLayout = (DrawerLayout) findViewById(R.id.drawer);
drawerToggle = setupDrawerToggle();
mDrawerLayout.setDrawerListener(drawerToggle);

private ActionBarDrawerToggle setupDrawerToggle() {
	return new ActionBarDrawerToggle(this, mDrawerLayout, mToolbar,
			R.string.app_name, R.string.app_name);
}

@Override
public void onConfigurationChanged(Configuration newConfig) {
	super.onConfigurationChanged(newConfig);
	drawerToggle.onConfigurationChanged(newConfig);

}

@Override
protected void onPostCreate(Bundle savedInstanceState) {
	super.onPostCreate(savedInstanceState);
	drawerToggle.syncState();
}