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Three ways to implement background tiling in Android

高洛峰
高洛峰Original
2017-01-20 15:46:311436browse

Method 1: System api implementation

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);

Method 2: XML implementation

xml path: res/drawable/bg.xml

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

Method 3: Custom drawing

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;  
}

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