blob: fbb24586204ca71526c51bae6181c0fd939f08ac [file] [log] [blame]
/*
* Copyright (C) 2012 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.android.contacts.util;
import android.view.View;
import android.view.ViewTreeObserver.OnDrawListener;
import android.view.ViewTreeObserver.OnGlobalLayoutListener;
import android.view.ViewTreeObserver.OnPreDrawListener;
/** Static methods that are useful for scheduling actions to occur at a later time. */
public class SchedulingUtils {
/** Runs a piece of code after the next layout run */
public static void doAfterLayout(final View view, final Runnable runnable) {
final OnGlobalLayoutListener listener = new OnGlobalLayoutListener() {
@Override
public void onGlobalLayout() {
// Layout pass done, unregister for further events
view.getViewTreeObserver().removeOnGlobalLayoutListener(this);
runnable.run();
}
};
view.getViewTreeObserver().addOnGlobalLayoutListener(listener);
}
/** Runs a piece of code just before the next draw, after layout and measurement */
public static void doOnPreDraw(final View view, final boolean drawNextFrame,
final Runnable runnable) {
final OnPreDrawListener listener = new OnPreDrawListener() {
@Override
public boolean onPreDraw() {
view.getViewTreeObserver().removeOnPreDrawListener(this);
runnable.run();
return drawNextFrame;
}
};
view.getViewTreeObserver().addOnPreDrawListener(listener);
}
}