android qr code reader

As follows:The production process is very simple is to add a logn icon in the original two-dimensional code image, the code of the comments written in detail, it will not give you a long-windedPackage Com.example.day44_02_qrcodewithlogin;import Java.util.hashmap;import Java.util.map;import Android.app.activity;import Android.graphics.bitmap;import Android.graphics.bitmap.config;import Android.graphics.bitma

First, add the Zxing Library reference to the Grandle.Compile ' com.google.zxing:core:3.1.0 'Generate two-dimensional code static class, return a two-dimensional code bitmappublic class Qrcodeutil {//Generate QR Chart public static Bitmap getqrcodeimage (int qr_width, int qr_height, String text) thr oWS Writerexception {try {//need to introduce core pa

What are some of the problems you will encounter with Android programming? Here for beginners 14 pieces of simple and useful code, save when needed easily a key to get. This includes checking for an SD card, making an activity transparent, setting a handle in the screen element, and so on, and so on, the short code that is often used in practical applications. 1

); Mpulllistview.setpullloadenabled (FALSE) is not available on pull load; Scroll in the end to automatically load available mpulllistview.setscrollloadenabled (true); Mcurindex = Mloaddatacount; Mlistitems = new linkedlist This is the layout that initializes a drop-down refresh and calls Setcontentview to set to the activity. After the Drop-down refresh is complete, we can call the Onpulldownrefreshcomplete () and Onpulluprefreshcomplete () methods to stop the refr

The program is always updated, Apple and other AppStore processing, the Android version of the automatic Update, on the code/** * Check and update app */(function (Cordova) {var define = Cordova.define; Define ("Cordova/plugin/updateapp", function (require, exports, module) {var Argscheck = require (' Cordova/argscheck '), exec = require (' cordova/exec '); Exports.checkandupdate = function (content,

Android.view.ViewGroup.LayoutParams; Import Android.view.Window; Import Android.view.WindowManager; Import android.view.animation.AlphaAnimation; Import Android.widget.FrameLayout; Import Android.widget.ImageView; Import Android.widget.ImageView.ScaleType; Import Com.lurencun.cfuture09.androidkit.thread.HandlerFactory; Public abstract class Introactivity extends activity {private static final String Flag_resource = "Flag_resource"; /** * Background task to complete the logo. * Private static

]) + Long.parselong (cpuinfos[15]) + Long.parselong (cpuinfos[16]); //log.e ("Baih", "app uses CPU time:" + appcputime); returnAppcputime; } //calculation process consumes CPU rate Public voidCpuinfo () {//Calculate CPU usage NewThread () { Public voidrun () {LongTOTALCPU1 =Gettotalcputime (); LongAPPCPU1 =Getappcputime (); Try{Thread.Sleep (3000); } Catch(interruptedexception e) {e.printstacktrace (); } LongTOTALCPU2 =Gettotalcputime (); Lo

1. The Android asynchronous messaging mechanism has the following two ways: (Asynchronous message delivery to resolve thread communication problems)Handler and Asynctask2, the use of handler official interpretation:1), timed tasks: Use Handler.postdelay (Runnable R, time) to execute MSG at specified times.2), inter-thread communication: Perform time-consuming tasks in a child thread when performing a more time-consuming operation, and then handler (th