107 lines
3.7 KiB
Java
107 lines
3.7 KiB
Java
/*
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* Copyright (C) 2017 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package com.android.settings.widget;
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import android.os.Handler;
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import android.os.Looper;
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import android.view.View;
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import android.view.animation.Animation;
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import android.view.animation.AnimationUtils;
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/**
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* A helper class that manages show/hide loading spinner.
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*/
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public class LoadingViewController {
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private static final long DELAY_SHOW_LOADING_CONTAINER_THRESHOLD_MS = 100L;
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public final Handler mFgHandler;
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public final View mLoadingView;
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public final View mContentView;
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public LoadingViewController(View loadingView, View contentView) {
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mLoadingView = loadingView;
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mContentView = contentView;
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mFgHandler = new Handler(Looper.getMainLooper());
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}
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private Runnable mShowLoadingContainerRunnable = new Runnable() {
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public void run() {
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handleLoadingContainer(false /* done */, false /* animate */);
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}
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};
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public void showContent(boolean animate) {
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// Cancel any pending task to show the loading animation and show the list of
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// apps directly.
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mFgHandler.removeCallbacks(mShowLoadingContainerRunnable);
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handleLoadingContainer(true /* show */, animate);
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}
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public void showLoadingViewDelayed() {
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mFgHandler.postDelayed(
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mShowLoadingContainerRunnable, DELAY_SHOW_LOADING_CONTAINER_THRESHOLD_MS);
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}
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public void handleLoadingContainer(boolean done, boolean animate) {
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handleLoadingContainer(mLoadingView, mContentView, done, animate);
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}
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/**
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* Show/hide loading view and content view.
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*
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* @param loading The loading spinner view
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* @param content The content view
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* @param done If true, content is set visible and loading is set invisible.
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* @param animate Whether or not content/loading views should animate in/out.
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*/
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public static void handleLoadingContainer(View loading, View content, boolean done,
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boolean animate) {
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setViewShown(loading, !done, animate);
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setViewShown(content, done, animate);
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}
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private static void setViewShown(final View view, boolean shown, boolean animate) {
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if (animate) {
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Animation animation = AnimationUtils.loadAnimation(view.getContext(),
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shown ? android.R.anim.fade_in : android.R.anim.fade_out);
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if (shown) {
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view.setVisibility(View.VISIBLE);
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} else {
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animation.setAnimationListener(new Animation.AnimationListener() {
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@Override
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public void onAnimationStart(Animation animation) {
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}
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@Override
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public void onAnimationRepeat(Animation animation) {
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}
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@Override
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public void onAnimationEnd(Animation animation) {
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view.setVisibility(View.INVISIBLE);
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}
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});
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}
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view.startAnimation(animation);
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} else {
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view.clearAnimation();
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view.setVisibility(shown ? View.VISIBLE : View.INVISIBLE);
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}
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}
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}
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