Sample demonstrating how to load large bitmaps efficiently off the main UI thread, caching bitmaps (both in memory and on disk), managing bitmap memory and displaying bitmaps in UI elements such as ViewPager and ListView/GridView.
This is a sample application for the Android Training class Displaying Bitmaps Efficiently.
It demonstrates how to load large bitmaps efficiently off the main UI thread, caching bitmaps (both in memory and on disk), managing bitmap memory and displaying bitmaps in UI elements such as ViewPager and ListView/GridView.
This sample uses the Gradle build system. To build this project, use the "gradlew build" command or use "Import Project" in Android Studio.
If you've found an error in this sample, please file an issue: https://github.com/googlesamples/android-DisplayingBitmaps
Patches are encouraged, and may be submitted by forking this project and submitting a pull request through GitHub. Please see CONTRIBUTING.md for more details.
Copyright 2017 The Android Open Source Project, Inc.
Licensed to the Apache Software Foundation (ASF) under one or more contributor license agreements. See the NOTICE file distributed with this work for additional information regarding copyright ownership. The ASF licenses this file to you 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.
compile "com.android.support:support-v4:26.1.0"
compile "com.android.support:gridlayout-v7:26.1.0"
compile "com.android.support:cardview-v7:26.1.0"
compile "com.android.support:appcompat-v7:26.1.0"
compileSdkVersion 26
minSdkVersion 9
targetSdkVersion 22
package com.example.android.displayingbitmaps.tests
versionCode 1
versionName 1.0
package com.example.android.displayingbitmaps
versionCode 1
versionName 1.0
uses-permission
Simple FragmentActivity to hold the main {@link ImageGridFragment} and not much else.
Called by the ViewPager child fragments to load images via the one ImageFetcher
The main adapter that backs the ViewPager. A subclass of FragmentStatePagerAdapter as there could be a large number of items in the ViewPager and we don't want to retain them all in memory at once but create/destroy them on the fly.
Set on the ImageView in the ViewPager children fragments, to enable/disable low profile mode when the ImageView is touched.