Android Basic Grammar (properties)-

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(adapter) +.notifydatasetchanged ();
Myadapter.notifydatasetchanged ();//When the size of the data changes 2, when the data changes, use

Lattice format:<gridview>
Picture transverse spacing: android:horizontalspacing= "5DP"
Picture longitudinal spacing: android:verticalspaccing= "5DP"

Tabular format:<listview>

<gradient/> in <shape></shape>;: is a progressive color control

Drop-down list:<spinner>
Entry Check Listener: sp.setonitemselected ();

<ImageSwitcher>+<Gallery> (Gallery)
Android:spacing (interval) = "3DP"

Control:
(1) android:visidility= "value has three 1, gone: Description control does not exist 2, invisible: Content disappears the control is still in the"
(2) Auto-complete text box:<autocompletetextview>
Android:completionth
(3) Image interception <clip></clip>
(4) <progress
Style= "@android: style/": Referencing a loaded style
Android:indeterminate= "turn"; style of imprecise scale when loading
Android:indeterminatedrawable= "" Change the background of an inexact scale style
android:max= "100": Up to a percentage of the program can be completed when loading
/&GT: Default wait load Yes small circle with
(5) <seekbar/> Can pull the progress bar, generally used in music player and video player
Add: <uses-permission android:name= "Android.permission.SET_WALLPAPER" phone in the manifest file
Permissions on the background
Private Wallpapermanager WM;
Wm=wallpapermanager.getinstance (this);
try{
Wm.setresource (R.DRAWABLE.F1);
}catch (ioexcepyion) {
E.peintstacktrace ();
}
Custom Artboards:
(1) Canvas.drawcolor (): Create Canvas background color
(2) Paint paint =new paint (); Define pen only
(3) Paint.setantialias (): Define Ruler
(4) Paint.setstyle ():
(5) Canvas.drawcircle (Scale of y-axis, scale of x-axis, radius scale, on what):
(6) Canvas.drawrect ()
(7) Path path=new path (); Define Brush Path
(8) Canvas.drawarc (area, starting angle, sweep angle, whether only arc, brush): Arc
(9) RECTF rectf=new RECTF (left, top, right, bottom): Paint area
(ten) Canvas.drawrect (left, upper, right, bottom, paint);

Create file permissions in the middle of an SD card
<uses-permission android:name= "android.permission.mount_unmount_filesystems/>
Permission to write data to the SD card
<uses-permission android:name= "Android.permission.WRITE_EXTERNAL_STORAGE"/>

Intentions are divided into two types 1, 2, Hidden intentions
Intent: Intended as a bridge associated component and component to be used generally with Intent intent=new Inten (this,activity.class (destination));
Another way of intent: Intent.setclassname (This,activiy,class);

Sqlitesatabase: Implementing a DB instance (write SQL statement)

* No UI controls can be changed in the Androzo thread;
Anr:applicatron no Response (program not responding)
Stack is characterized by advanced, the activity at the top of the stack shows that activity

Methods of activity:
1, Onactivityresult: Rewrite acivity, receive acivity return value

Android Basic Grammar (attributes)-(GO)