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HashMap source from: android-25/java/util/HashMap 1. Construction methods static final int MAXIMUM_CAPACITY = 1 << 30; static final int DEFAULT_INITIAL_CAPACITY = 4; static final float DEFAULT_LOAD_FACTOR = 0.75f; public HashMap() { this(DEFAULT_INITIAL_CAPACITY, DEFAULT_LOAD_FACTOR); } // The default parameter is 4,0.75f public Hash ...

Use local service I. define java interface public interface CalculateI { int addab(int a, int b); } Create a Binder subclass, inherit Binder and implement interface methods public class CalculateBinder extends Binder implements CalculateI{ @Override public int addab(int a, int b) { return a+b; } } III. Onbind in ...

Kotlin is a static language that runs on Java virtual machines, Android s, and browsers. It is 100% compatible with JAVA. If you are familiar with Java, you will find that Kotlin still uses the classic JAVA collection framework, in addition to its own standard libraries. Introduction to kotlin First try the Kotlin code.The Book class contains t ...

The implementation effect is as follows: after obtaining the keyboard height, manually move the input box: 20190402144716388.gif Although the pop-up of the input box is not smooth enough, it seems a little stiff, but we can add appropriate animation to improve it. The method is to cover a PopupWindow with a width of 0 and a ...

public class HandlerThread extends Thread { int mPriority; int mTid = -1; Looper mLooper; private @Nullable Handler mHandler; public HandlerThread(String name) { super(name); mPriority = Process.THREAD_PRIORITY_DEFAULT; } /** * Constructs a HandlerThread. * @param name ...

Preface Text and pictures of the text come from the network for learning and communication purposes only. They do not have any commercial use. Copyright is owned by the original author. If you have any questions, please contact us in time for processing. Author: Star Ango, AirPython Target Scene I believe that when you brush short video with sh ...

This article mainly uses the generic optimization project structure to explain the key modifications. If you don't understand the project structure, please see my last two Blogs: Android MVVM improved DataBinding+Retrofit+RxJava+ViewModel+LiveData (2) Android MVVM Basic Edition DataBinding+Retrofit+RxJava (1) I. modify BaseA ...

When sharing wechat, the carrying parameters of sharing link may not be fixed. You need to know that this is the basic code for dynamically setting sharing link before sharing, which is not so detailed, but the general process is as follows 1. Install and reference jssdk npm install --save weixin-js-sdk const wx=require('weixin-js-sdk') ...

This article starts with WeChat public's "Android development tour". Welcome to pay more attention to get more dry goods. Background introduction In the previous article, we mainly introduced the origin of Jetpack and the component library contained in each of the four components. In this article, we will learn about lifecycle compone ...

1. configuration: 1.1 add permissions and FileProvider in Android manifest.xml: -------------------------------------------------------------------------------------------------------------------- <uses-permission android:name="android.permission.INTERNET"/> <uses-permission android:name="android.permission.READ_EX ...