Android

When parsing JSON data, as always, according to the Java development habits, directly to the jar bag test into the project The results of the following error occurred: Dex Loader] Unable to execute Dex:multiple Dex files define

Foreword: The return logic of our project request is, in Xwalkview inside all the page clicks the physical return key, will perform double repel the function, therefore, if your project request is not such, then this post does not have the big use

There are times when you need to save the data in your interface, and it's convenient to use a JSON string. In the app development network request this piece, has been converted to been file way so far, cannot get the original JSON string, needs to

Android Start Analysis-init process &init.rc[turn] This article turns from: http://h1372865100.blog.163.com/blog/static/210429103201292911399594/ First, the INIT process starts (Some native services started) such as: ServiceManager start Zygote

In Linux, there is a special function fork (). This function returns the process number PID of the subprocess to the parent process, and returns 0 to the child process. Have you ever wondered how a function might have two different return values? In

Always have permission to apply for the problem, not enough attention, has been plagued recently, forget to say, look at the code. 1, first judge the SDK version numberif (Build.VERSION.SDK_INT >= 23) {Checkandrequestpermission ()/check

I. Description of the IMPORTANT package: Android.app: Provides a high-level program model and provides a basic operating environment Android.content: Classes that contain various access to and publication of data on the device Android.database:

1. Introduction Since the iphone's debut in 07 to bring smartphones directly to the mobile internet era, smartphone penetration has soared, while the entire market is now showing a two-strong rivalry between the iphone and the Android phone. iOS is

Quote from Easyandroid Forum, original: http://www.easyandroid.com/bbs/viewthread.php?tid=33 1. The message mechanism to utilize the communication between Android threads 1.1.Message The code is in the

Tween animation is a transition process that shows rotation, gradients, moves, and scaling, that is, tweened animation. There are two ways to define Tween animations: XML form, encoding form. XML definition Animation , complete XML according to

Android Call so The Android virtual machine cannot call the underlying device directly, and we need to use so if we want to call the underlying device. So use C language or C + + writing complete, using NDK to compile, run directly in the Linux

When using JNI in a Java environment, you can easily print information using the printf function, and in the Eclipse Console console view it is easy to observe that if you use JNI in an Android environment, the printf function will not work. No

[Java]View Plain copy print?                Import Java.text.SimpleDateFormat;        SimpleDateFormat formatter = new SimpleDateFormat ("YYYY year mm month DD Day HH:mm:ss"); Date curdate = new Date (System.currenttimemillis ());//Get current time

Android has three different forms of menus: 1. Option menu (Optinosmenu) 2. Context menu (ContextMenu) 3. submenu (submenu) One of the most common is the option menu (Optionsmenu), which is displayed at the bottom of the corresponding activity after

Refer to "Professional Android 4 Development" Fragment Introduction Fragment is that we can separate the activity into components that have their own lifecycle and UI. Its greatest use is to fit different screens. Create fragment There are many

Surface&canvas Canvas for the meaning of the canvas. Most of the graphics on the Android top are done by canvas instances, but canvas is more of an interface wrapper. Drawpaints, Drawpoints,drawrect,drawbitmap ... 1 The essential relationship

In the development of Android applications, sometimes to save the user's information, in the entire application can be accessed, of course, with the Android-supported SQLite database is OK, but if only to store some of the comparative advice or a

Today I learned to create a second activity and switch from main_activity to second_activity Here's a summary of the process: Create a new XML layout file, (res>layout) write a layout class to create a new activity Class (Class)

To manage fragment, you need to use Fragmentmanager, and to get it, you call Method Getfragmentmanager () in the activity. You can use Fragmentmanager to do these things: 1 Use the method Findfragmentbyid () or Findfragmentbytag () to obtain the

Recently, the company's app to achieve access to the app when users manually select the area, and then log in, this time is actually the corresponding server address selected, however, in the implementation process, I found sharedpreferences in the