restore Larger View with Animation - Android User Interface

Android examples for User Interface:View Animation

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Description

restore Larger View with Animation

Demo Code

/*//from   w  w  w .  j  av a 2s . c o  m
 * Copyright (C) 2012 
 * 
 * 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.java2s;
import android.view.View;
import android.view.animation.AccelerateDecelerateInterpolator;

import android.view.animation.Animation;

import android.view.animation.ScaleAnimation;

public class Main {

    public final static long aniDurationMillis = 1L;

    public static void restoreLargerView(View view, float scale) {
        if (view == null)
            return;
        int width = view.getWidth();
        float toSize = 1 + scale / width;
        scaleView(view, -1 * toSize);
    }

    private static void scaleView(final View view, float toSize) {
        ScaleAnimation scale = null;
        if (toSize == 0) {
            return;
        } else if (toSize > 0) {
            scale = new ScaleAnimation(1.0f, toSize, 1.0f, toSize,
                    Animation.RELATIVE_TO_SELF, 0.5f,
                    Animation.RELATIVE_TO_SELF, 0.5f);
        } else {
            scale = new ScaleAnimation(toSize * (-1), 1.0f, toSize * (-1),
                    1.0f, Animation.RELATIVE_TO_SELF, 0.5f,
                    Animation.RELATIVE_TO_SELF, 0.5f);
        }
        scale.setDuration(aniDurationMillis);
        scale.setInterpolator(new AccelerateDecelerateInterpolator());
        scale.setFillAfter(true);
        view.startAnimation(scale);
    }
}

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