android实现背景平铺的三种方法

Bitmap bitmap = BitmapFactory.decodeResource(getResources(), R.drawable.pic); 
//bitmap = Bitmap.createBitmap(100, 20, Config.ARGB_8888); 
BitmapDrawable drawable = new BitmapDrawable(bitmap); 
drawable.setTileModeXY(TileMode.REPEAT , TileMode.REPEAT ); 
drawable.setDither(true); 
view.setBackgroundDrawable(drawable);

<bitmap xmlns:android="http://schemas.android.com/apk/res/android"  
    android:src="@drawable/img" 
　　  android:tileMode="repeat" /> 

public static Bitmap createRepeater(int width, Bitmap src){ 
　　int count = (width + src.getWidth() - 1) / src.getWidth(); 
　　Bitmap bitmap = Bitmap.createBitmap(width, src.getHeight(), Config.ARGB_8888); 
　　Canvas canvas = new Canvas(bitmap); 

　　for(int idx = 0; idx < count; ++ idx){ 
　　  canvas.drawBitmap(src, idx * src.getWidth(), 0, null); 
　　} 

　　return bitmap; 
}