Android Support Library v4: The best practice of improving performance in the Java class library

Android Support Library v4: The best practice of improving performance in the Java class library Android Support Library V4 is one of the Java libraries used to develop Android applications.It provides many Android operating systems that are compatible with different versions and practical program categories that provide additional functions.This article will introduce the best practice to improve performance in Android Support Library V4, and provide relevant programming code and configuration description. 1. Use the latest version of SUPPORT LIBRARY V4: Make sure the latest version of the SUPPORT LIBRARY V4 is used to obtain the latest performance optimization and error repair. 2. Use Proguard to confuse code: When building an application, use the Proguard tool to confuse code to reduce the size of the APK file and improve the performance of the application. 3. Avoid excessive use of reflection: Try to avoid using reflex operations because it will reduce the performance of the application.If you do need to use reflexes, you should evaluate whether there are better alternatives of other performance. 4. Reduce memory occupation: The memory of the Android device is often limited, so when using SUPPORT LIBRARY V4, you should pay attention to reducing memory occupation.For example, a large number of anonymous internal classes can be avoided, and frequent creation and destruction objects can be avoided. 5. Use asynchronous task time to process time -consuming operations: When performing time -consuming operations, use asynctask to handle it to avoid blocking the application of the application on the main thread. 6. Optimized alternative to using lists, sets, and arrays: When using lists, sets (sets), and array (array), you can consider more useful alternatives, such as Sparsearray, ArrayMap, Sparsebooleanarray, etc. Example code and configuration description: 1. Use the latest version of SUPPORT LIBRARY V4: Add the following dependencies to the project's Build.gradle file to ensure the use of the latest version of the SUPPORT LIBRARY V4: dependencies { implementation 'androidx.legacy:legacy-support-v4:1.0.0' } 2. Use PROGUARD to confuse the code: In the built.gradle file of the project, turn on the PROGUARD confusion function: android { buildTypes { release { minifyEnabled true proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro' } } } Add the following rules to the Proguard-Rules.pro file to protect the class and methods of the SUPPORT LIBRARY V4: -keep class android.support.v4.** { *; } 3. Reduce memory occupation: Avoid frequent creation and destroying objects, you can use the Object Pool mode to reuse the object to reduce the overhead of memory distribution. 4. Time -consuming operation of using asynchronous tasks: Define a class that inherits asynctask and perform time -consuming operations in the DoinbackGround method, such as network requests and database queries.Process the results in the OnPostexecute method.For example: private class MyAsyncTask extends AsyncTask<Void, Void, Result> { @Override protected Result doInBackground(Void... voids) { // Time -consuming operation return result; } @Override protected void onPostExecute(Result result) { // Processing the operation results on the UI thread } } Call asynchronous task: new MyAsyncTask().execute(); The above is the introduction of the best practice of improving performance in Android Support Library V4, including related programming code and configuration description.By following these best practices, you can improve your application performance and provide a better user experience.