Practical Android open source library collation

In the development process of Android, every developer has more or less used third-party open source libraries. Using third-party open source libraries can save developers a lot of energy and time, and then better pay attention to the business logic of the application itself.

Here are some of the open source libraries that developers use most frequently.

Fresco

Fresco is a very powerful open source library for displaying images, and it handles loading and displaying images very well. The ability to load images from the network, local databases, local resources, and to pre-set a preset image placeholder before the image is loaded. There are two levels of cache (memory and hard disk cache)

Dependencies {/ / your app 's other dependencies compile' com. Facebook. The fresco ": fresco" : '} 1.0.1Copy the code

Fresco also provides several other open source libraries that support GIFs, WebP, and more

dependencies { // If your app supports Android versions before Ice Cream Sandwich (API level 14) compile 'com. Facebook. Fresco ": animated - base - support:' 1.0.1 / / For animated GIF support the compile 'com. Facebook. Fresco ": animated - GIF:' 1.0.1 / / For WebP support, O animated WebP compile 'com. Facebook. Fresco ": animated - WebP:' 1.0.1 compile 'com. Facebook. Fresco ": webpsupport:' 1.0.1 / / For WebP support, Without animations compile 'com. Facebook. Fresco ": webpsupport:' 1.0.1 / / dojo.provide the Android support library (you took Already have this or a similar dependency) compile 'com. Android. Support: support - core - utils: 24.2.1'}Copy the code

Glide

Glide is a fast and efficient multimedia management and picture loading framework that encapsulates multimedia decoding, memory and hard disk caching, and is interface friendly

Dependencies {the compile 'com. Making. Bumptech. Glide: glide: 3.7.0' compile 'com. Android. Support: support - v4:19.1.0'}Copy the code

OkHttp

OkHttp is an Android HTTP+HTTP/2 client that encapsulates the connection to the network

Dependencies {the compile 'com. Squareup. Okhttp3: okhttp: 3.6.0'}Copy the code

FastAndroidNetworking

FastAndroidNetworking is a web engine based on OkHttp

Dependencies {the compile 'com. Amitshekhar. Android: android - networking: 0.4.0'}Copy the code

RxJava

RxJava-Reactive Extensions for the JVM

Dependencies {the compile 'IO. Reactivex. Rxjava2: rxjava: at 2.0.5'}Copy the code

package rxjava.examples; import io.reactivex.*; public class HelloWorld { public static void main(String[] args) { Flowable.just("Hello world").subscribe(System.out::println); }}Copy the code

If you are using a platform that does not already support A Java 8 lambda, use the following code

Flowable.just("Hello world") .subscribe(new Consumer<String>() { @Override public void accept(String s) { System.out.println(s); });Copy the code

EventBus

The Android event bus has been optimized to transfer data between Activities, Fragments, Threads, Services, etc., with less code and higher quality

The compile 'org. Greenrobot: eventbus: 3.0.0'Copy the code

Define events

public static class MessageEvent { /* Additional fields if needed */ }
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Prepare subscribers

@Subscribe(threadMode = ThreadMode.MAIN)  
public void onMessageEvent(MessageEvent event) {/* Do something */};
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@Override
public void onStart() {
    super.onStart();
    EventBus.getDefault().register(this);
}
@Override
public void onStop() {
    super.onStop();
    EventBus.getDefault().unregister(this);
}
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Send the event

EventBus.getDefault().post(new MessageEvent());
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Device Year Class

Device Year Class is an Android library that provides better ways to modify applications based on the phone’s hardware

The compile 'com. Facebook. Device. Yearclass: yearclass: 2.0.0Copy the code

int year = YearClass.get(getApplicationContext());
if (year >= 2013) {
    // Do advanced animation
} else if (year > 2010) {
    // Do simple animation
} else {
    // Phone too slow, don't do any animations
}
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Network Connection Class

An Android open source library that monitors network connection quality and allows users to adjust application behavior (loading low-quality images and videos, etc.) based on network connection quality

The compile 'com.facebook.net work. Connectionclass: connectionclass: 1.0.1'Copy the code

Android Debug Database

Android Debug Database is a powerful open source library that enables developers to Debug databases and SharedPreferences directly through a browser

DebugCompile 'com. Amitshekhar. Android debug - db: 0.5.0'Copy the code

LeakCanary

LeakCanary is an open source library that detects memory leaks

Dependencies {debugCompile 'com. Squareup. Leakcanary: leakcanary - android: 1.5' releaseCompile 'com. Squareup. Leakcanary: leakcanary - android - no - op: 1.5' testCompile 'com. Squareup. Leakcanary: leakcanary - android - no - op: 1.5'}Copy the code

public class ExampleApplication extends Application { @Override public void onCreate() { super.onCreate(); if (LeakCanary.isInAnalyzerProcess(this)) { // This process is dedicated to LeakCanary for heap analysis. // You should not init your app in this process. return; } LeakCanary.install(this); // Normal app init code... }}Copy the code

MPAndroidChart

A powerful chart making open source library, support line chart, pie chart, radar chart, bubble chart, etc

Dependencies {the compile 'com. Making. PhilJay: MPAndroidChart: v3.0.1'}Copy the code

ButterKnife

ButterKnife is a view-binding tool that generates some corresponding, cleaner code through annotations

Dependencies {the compile 'com. Jakewharton: butterknife: 8.5.1 annotationProcessor 'com. Jakewharton: butterknife - compiler: 8.5.1'}Copy the code

class ExampleActivity extends Activity { @BindView(R.id.user) EditText username; @BindView(R.id.pass) EditText password; @BindString(R.string.login_error) String loginErrorMessage; @OnClick(R.id.submit) void submit() { // TODO call server... } @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.simple_activity); ButterKnife.bind(this); // TODO Use fields... }}Copy the code

Dagger

An injection framework

dependencies {
  compile 'com.google.dagger:dagger:2.x'
  annotationProcessor 'com.google.dagger:dagger-compiler:2.x'
}
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GreenDao

GreenDao is an open source Android ORM framework, better operation SQlite, provides a friendly interface to operate the underlying database operations

Realm

Simple and fast storage, save more development time, is a mobile device database

Timber

Timber is an open source log framework

The compile 'com. Jakewharton. Timber: timber: 4.5.1'Copy the code

Androig GPU Image

Provides an image filter framework based on OpenGL

Dependencies repositories {jcenter ()} {the compile 'jp. Co. Cyberagent. Android. Gpuimage: gpuimage - library: the 1.4.1'}Copy the code

@Override public void onCreate(final Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity); Uri imageUri = ... ; mGPUImage = new GPUImage(this); mGPUImage.setGLSurfaceView((GLSurfaceView) findViewById(R.id.surfaceView)); mGPUImage.setImage(imageUri); // this loads image on the current thread, should be run in a thread mGPUImage.setFilter(new GPUImageSepiaFilter()); // Later when image should be saved saved: mGPUImage.saveToPictures("GPUImage", "ImageWithFilter.jpg", null); }Copy the code

Uri imageUri = ... ; mGPUImage = new GPUImage(context); mGPUImage.setFilter(new GPUImageSobelEdgeDetection()); mGPUImage.setImage(imageUri); mGPUImage.saveToPictures("GPUImage", "ImageWithFilter.jpg", null);Copy the code

Open source library related video explanation

The 8 most commonly used Android modules and third-party open source modules (Jetpack/IOC/RxJava/ Plug-in/hotfix Design/Network Access framework/componentization/Image loading framework