Android activity 平铺背景图片


发表于09月27日 10:10
图片平铺的三种方式:

  1)第一种利用系统提供的api实现


   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 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);


  2)第二种我们使用xml来轻松实现

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


  3)第三种自己画出来


  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;
   }
  public static Bitmap createRepeater(int width, Bitmapsrc){
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;
  }


  前两种偶尔会出现bug,平铺有问题,还是最后一种比较使用,呵呵!

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