Source code analysis of Android system startup process

Original address 1. When the system boot program starts the Linux kernel, the kernel will record various data structures and drivers. After loading, the Android system starts and loads the first user level process: Init.c(system\core\init) //main() method in Init.c int main(int argc, char **argv) { //Parsing execution ini ...

Posted by Xyox on Thu, 02 Apr 2020 05:46:27 +0200

Xamarin.Forms read and display Android and iOS address book - TerminalMACS client

This article updates the address synchronously: https://dotnet9.com/11520.html https://terminalmacs.com/861.html Read navigation: 1, Function description 2, Code implementation 3, Source code acquisition 4, References 5, Later plans 1, Function description Complete Mind Map: https://github.com/dotnet9/TerminalMACS/blob/master/docs/TerminalM ...

Posted by Aaron111 on Wed, 01 Apr 2020 18:48:23 +0200

Android integrated native wechat authorization to obtain user information login

Android integrated native wechat authorization to obtain user information login What I use in the project is to click a button to initiate wechat authorization request. First, determine whether to install wechat. If wechat is installed, authorize users. After the authorization is successful, obtain user information such as ope ...

Posted by jnewing on Wed, 01 Apr 2020 15:06:42 +0200

Full record of SoundPool problems in Android Development

This tool class actually solves the problem that the Android higher version cannot play the resource file normally! And call extremely simple, a code can, do not understand there is Demo to download! All code import android.media.*; import android.content.*; import android.os.*; import android.app.*; import androi ...

Posted by abasel on Tue, 31 Mar 2020 23:41:50 +0200

Understanding of intelligent agriculture project

1, Implementation of UI interface This is not difficult, because the teacher gave us the renderings in advance, but one of the more complex points is to realize the image sliding, that is to use a Viewpager in the fragment to realize the image sliding. 2, Set ip address: The code is as follows public static Stri ...

Posted by 303tech on Tue, 31 Mar 2020 17:48:46 +0200

Android editing information interface, package of composite control

Github address (full Demo, welcome to download) https://github.com/ganchuanpu/ItemGroup Design sketch   attrs.xml 1 <?xml version="1.0" encoding="utf-8"?> 2 <resources> 3 <declare-styleable name="ItemGroup"> 4 <! -- text of title -- > 5 <attr name="title" format="string" /> 6 <! -- font size ...

Posted by astoller on Tue, 31 Mar 2020 16:50:26 +0200

A problem about function changing itself and then running itself

Problem Description: I wrote a function class. In the prototype, there is an attribute (value is a function) to judge the platform. In order to optimize, I thought of using function self execution and closure to make multiple operations only need to go through the judgment process once. The problem is that I thought of ...

Posted by hughmill on Tue, 31 Mar 2020 08:14:40 +0200

Android BLE Bluetooth uses one

Android ble Bluetooth development I. whether BLE Bluetooth is supported private boolean isSupportBluetooth(boolean istoast) { if (!this.getPackageManager().hasSystemFeature(PackageManager.FEATURE_BLUETOOTH_LE)) { if (istoast) { Toast.makeText(this, "Your device does not support ...

Posted by bladecatcher on Mon, 30 Mar 2020 23:01:32 +0200

Android layout optimization (I) view stub details

1.ViewStub inheritance relationship public final class ViewStub extends View java.lang.Object ↳ android.view.View ↳ android.view.ViewStub The definition of ViewStub on the official website: a ViewStub is an invisible, zero sized view that can be used to lazily inflate layout resources at runtime. This mea ...

Posted by Spinicrus on Sun, 29 Mar 2020 20:47:04 +0200

Customize your own dynamic application authority Library

Why to customize your own dynamic application authority Library After Android 6.0, Android system requires dynamic application for sensitive permissions. This user brings great convenience, but also brings greater challenges to developers. The official API is provided for developers to use, but it's a bit cumbersome to use. There are also many ...

Posted by run2web on Sun, 29 Mar 2020 17:54:24 +0200