Android Development Learning-Basic Learning

In the public number, found a self-taught Android an article, feel good. Make a small summary of it and arrange it to everyone. 1. Basic UI Learning

Button/textview/edittext/checkbox/imageview/girdview, etc., set in Activitymain.xml, occupy a place on the screen.

You can set the properties of these components,

: ID (unique identifier)

: Layout_width (Wide)

: Layout_height (High)

: Text (literal)

: Textsize/textcolor/textstyle

: Layout_gravity (the position of the control relative to the parent view)

: Gravity (Specifies the base position of the control)

: Padding/margin

: hint= "" (Default hint)

: Layout_weight (weight)/=0 (Specify how big it Takes)/>0 (average allocation of free space on the parent view)

2. Four Component Learning

Note: By default, the service is running in the main thread, and by default the Broadcastreceiver is in the Android system and does not die as the application shuts down.

3. Five large-format learning

Set in Activitymain.xml

Some special properties:

LinearLayout

: Orientation (alignment, horizontal or vertical)

Relativelayout

: Layout_alignparentright= "true"

: layout_below= under "@id"

: Layout_toleftof/torightof Left/Right

: Align Top of layout_aligntop

: Layout_alignleft left Alignment

: Layout_centerhorizontal= "true" horizontally centered

4. Friendly and interactive learning

5. Data storage

• The memory store stores data in memory and reads the fastest but cannot be stored permanently.

• The file store stores the data as files on disk through the IO stream of java.

• Sharedpreferences stores data on disk as a fixed-format XML file.

• Database storage typically refers to storing data in a SQLite database that comes with Android.

• Networked storage is about uploading data to the cloud for storage. (Typical application: Network disk)

6. Network access

• HttpClient: It is provided by Apache.

• HttpURLConnection: Google is based on Java's own urlconnection improvements.

• Socket:socket is a TCP/IP-based communication tool that comes with Java.

• Webview:webview is a browser-based view of the Google Chromium kernel.

Note: Android will no longer be able to perform network operations on the main thread after starting from 4.0.

7. Animated Commentary

8. Drawing

• View Drawing-android Three most basic objects (Color,paint,canvas)

9. Multimedia and Camera

10. Advanced UI Learning

Note: When using fragment, do you use the android.support.v4.app.Fragmentandroid.app.Fragment

11. Style Development

12. Multi-Threading and communication

• Handle Learning-android Message processing mechanism (Handler, Looper, MessageQueue and message)

13. Other Knowledge points

This is the introduction of the general framework, the specific study also requires a lot of effort!

Android Development Learning-Basic Learning