Programmer Think

catalogue 1. Dynamic method: 2. Static registration broadcast 3. Send and receive custom broadcasts 4. Cross program receive broadcast There are two kinds of broadcasting, static broadcasting and dynamic broadcasting. 1. Dynamic method: Rewrite the broadcast receiver to accept the broadcast and operate according to the received broa ...

Hello, dear friends, Yien is seeing you again. Unlike the general introduction articles on the Internet, which only stay at the level of "how to use", this article understands gradle from the perspective of source code. Of course, if you haven't read my previous article "If you don't understand gradle after reading this ar ...

We do not actively declare the class of the Activity, so how does the system find the corresponding Activity for us? In fact, this is the same as the normal Activity startup process, except that the implementation of if / else is different. The beginning of doubt Have you ever thought about a question: where browser Open a web page in. There ...

1, HashMap < string, string > /* * HashMap: it is a Map interface implementation based on hash table. * the hash table is used to ensure the uniqueness of keys.  *  * HashMap<String,String> * key: String * value: String  */ package cn.itcast_02; import java.util.HashMap; import java.util.Set; public class HashMapDemo { publ ...

Experiment 12 SQL + content Provider experiment 1, Experimental purpose Be familiar with the use of Content Provider; 2, Experimental content 1. Implement the calling of ContentProvider and ContentResolver through URI; 2. Realize the functions of ContentProvider on database SQLite: add, delete, modify and query; 3. The table structure of th ...

When I first came into contact with ListView, I always saw others make a lot of strange interfaces, but I just couldn't. then I learned to customize the View, thinking that ListView can also customize the desired style, and then collected a lot of methods on the Internet, either I can't understand it, the code has not been copied yet, or it's n ...

2021.10.4 simple login and registration, with its own database and simple animation interface.           Recently, learning Android java mobile development requires a login and registration interface. I don't have much time to write a simple version. Get to the point: Ps: you can enter the animation without adding it ...