1 handler message loop MessageQueue
Processing
2 Fragment life cycle
3 ContentProvider
4 WebView
5 Broadcastreciver Broadcast
6 getting ContentProvider Contentreciver of contacts
Get the user's avatar, phone number, etc.
7 The malposition of the ListVIew picture
Think about it for a moment:
GetView () Look at the source code
8 ListView Optimization:
Reuse of Convertview View
9 Service
Several ways:
First Kind
StartService ()
The second Kind
Bindservice ()
Ten Asynctask () asynchronous tasks
Common methods
Doinbackground () Processing child threads
Onupdateexcute ()
Onpostexcute ()
For example:
Private class Downloadfilestask extends Asynctask<url, Integer, long> {
Protected Long doinbackground (URL ... urls) {
int count = Urls.length;
Long totalsize = 0;
for (int i = 0; i < count; i++) {
TotalSize + = Downloader.downloadfile (Urls[i]);
Publishprogress ((int) ((I/(float) count) * 100));
Escape early if Cancel () is called
if (iscancelled ()) break;
}
return totalsize;
}
protected void Onprogressupdate (Integer ... progress) {
Setprogresspercent (Progress[0]);
}
protected void OnPostExecute (Long result) {
ShowDialog ("downloaded" + result + "bytes");
}
}
Volley
Xutils
HttpClient
Get Post
Json Parsing method
What are the types of:
Org.json
Gson
Fastjson
XML Parsing method
Dom Tree
Sax
Pull
Intent several ways
Activity life cycle
Sharereferrence
What is Base64?
20 Ways to encrypt: you know.
Serizaable serializable
XMPP
23 Customizing view
Bar chart
Pie chart
Jpush push
25 Determining the network connection
26 Audio
27 Video
Viewpager
29 Cache of Images
Two-time sampling
Viewpager and Horzitalscrollview
Layout_grivity The position of the current child space relative to the parent control
Grivity Own internal content
Layout_weight weight
Divide the remaining controls evenly.
SQL database
Type of support:
34 Event Distribution mechanism
35 International Principles
36 Principles of Internationalization
When the phone starts, it detects the language of the phone,
Go back and load the XML file at the end of En. If not,
The default XML file is automatically loaded.
3,700 degree Map
Internationalization of Java?
Local localization
Properties file
Android---------------Basics
