Android Open Source - adkintun-mobile-browser Drop Down Anim

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License

The source code is released under:

Apache License

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Java Source Code

/**
* Copyright 2013 NIC Chile Research Labs
* //w ww  .j a v  a2  s  .co  m
* 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 cl.niclabs.adkintunmobile.browser;

import android.view.View;
import android.view.animation.Animation;
import android.view.animation.Transformation;

/**
 * Animacin de dropdown Menu, utilizado para desplegar y ocultar la barra de direcciones.
 * 
 * @author Sebastin Pereira
 *
 */
public class DropDownAnim extends Animation {
    int targetHeight;
    View view;
    boolean down;

    public DropDownAnim(View view, int targetHeight, boolean down) {
        this.view = view;
        this.targetHeight = targetHeight;
        this.down = down;
    }

    @Override
    protected void applyTransformation(float interpolatedTime, Transformation t) {
        int newHeight;
        if (down) {
            newHeight = (int) (targetHeight * interpolatedTime);
        } else {
            newHeight = (int) (targetHeight * (1 - interpolatedTime));
            if(interpolatedTime == 1)
              view.setVisibility(View.GONE);
        }

        view.getLayoutParams().height = newHeight;
        view.requestLayout();
    }

    @Override
    public void initialize(int width, int height, int parentWidth,
            int parentHeight) {
        super.initialize(width, height, parentWidth, parentHeight);
    }

    @Override
    public boolean willChangeBounds() {
        return true;
    }
}

Java Source Code List