src/com/android/storagemanager/utils/Utils.java

/*
 * Copyright (C) 2017 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.storagemanager.utils;

import android.view.View;
import android.view.animation.Animation;
import android.view.animation.Animation.AnimationListener;
import android.view.animation.AnimationUtils;

public class Utils {

    public static void handleLoadingContainer(
            View loading, View doneLoading, boolean done, boolean animate) {
        setViewShown(loading, !done, animate);
        setViewShown(doneLoading, done, animate);
    }

    private static void setViewShown(final View view, boolean shown, boolean animate) {
        if (animate) {
            Animation animation =
                    AnimationUtils.loadAnimation(
                            view.getContext(),
                            shown ? android.R.anim.fade_in : android.R.anim.fade_out);
            if (shown) {
                view.setVisibility(View.VISIBLE);
            } else {
                animation.setAnimationListener(
                        new AnimationListener() {
                            @Override
                            public void onAnimationStart(Animation animation) {}

                            @Override
                            public void onAnimationRepeat(Animation animation) {}

                            @Override
                            public void onAnimationEnd(Animation animation) {
                                view.setVisibility(View.GONE);
                            }
                        });
            }
            view.startAnimation(animation);
        } else {
            view.clearAnimation();
            view.setVisibility(shown ? View.VISIBLE : View.GONE);
        }
    }
}