Android Knowledge Grooming

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Google engineers analyze Android system architecture

http://www.oschina.net/question/12_13318

Android is not a canonical or distributed version of the traditional Linux style or a series of reusable component integrations, and Android is a software block for connecting devices .

The Dalvik virtual machine only executes. dex

APK is a compressed folder

Android manifest--interface between app and Android system

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1-Android threading model and Asynctask

http://www.oschina.net/question/4873_24644

Android provides several ways to access the UI thread in other threads.

Activity.runonuithread (Runnable)

View.post (Runnable)

view.postdelayed (Runnable, long)

Hanlder

eg

New Thread ( new Runnable () {

Public void run () {

final Bitmap b = loadimagefromnetwork ();

Mimageview.post ( new Runnable () {

Mimageview.setimagebitmap (b);

});

}

}). Start ();

This method is more cumbersome

Android offers a tool class: Asynctask, more Simple

You can also use callback to make callbacks after the picture is loaded

Android Knowledge Grooming