Android apidemos learning APP/activity/setwallpaper

The wallpaper setting example also involves some image conversion content.

Get current Wallpaper

 
Final wallpapermanager = wallpapermanager. getinstance (this); Final drawable wallpaperdrawable = wallpapermanager. getdrawable ();
 

Set the wallpaper to imageview.

 
Imageview. setdrawingcacheenabled (true); imageview. setimagedrawable (wallpaperdrawable );
 

Because the image must be processed, the catch

Imageview. setdrawingcacheenabled (true)

When you click the randomize button, a random number is generated and the color is retrieved from the predefined data.

 
Int mcolor = (INT) math. Floor (math. Random () * mcolors. Length );
 

Then, the color is overwritten on the image and only some colors are allowed to pass through.

 
Wallpaperdrawable. setcolorfilter (mcolors [mcolor], porterduff. mode. Multiply );
 

Mcolors is a data with predefined colors

Final Static private int [] mcolors = {color. blue, color. green, color. red, color. ltgray, color. magenta, color. cyan, color. yellow, color. white };
 

Click set wallpaper to set the new wallpaper to the system.

 
Wallpapermanager. setbitmap (imageview. getdrawingcache ());
 

The effect is as follows: