android 设置壁纸几种方法

总结一下，android中设置壁纸几种方法

方法一: 获取WallpaperManager实例

 private void set_mytheme(int resid){
     	 WallpaperManager wallpaperManager = WallpaperManager.getInstance(this);  
       //   Resources res = getResources();           
          try {  
              wallpaperManager.setResource(resid);  
          }  
          catch (IOException e) {  
              Toast.makeText(getApplicationContext(), "更换壁纸失败，强稍后重试", 200);
          }  
     }

方法二：

 private void set_mytheme(int resid){
     	getWindow().setBackgroundDrawableResource(int resid);
     }

方法三：

 private synchronized void selectWallpaper(int position) {
       
        try {
            InputStream stream = getResources().openRawResource(IMAGE_IDS[position]);
            setWallpaper(stream);
            setResult(RESULT_OK);
            
        } catch (IOException e) {
            Log.e(LOG_TAG, "Failed to set wallpaper " + e);
        }
    }

方法四：
 getWindow().setBackgroundDrawable(new ClippedDrawable(wallpaper));

/**
     * When a drawable is attached to a View, the View gives the Drawable its dimensions
     * by calling Drawable.setBounds(). In this application, the View that draws the
     * wallpaper has the same size as the screen. However, the wallpaper might be larger
     * that the screen which means it will be automatically stretched. Because stretching
     * a bitmap while drawing it is very expensive, we use a ClippedDrawable instead.
     * This drawable simply draws another wallpaper but makes sure it is not stretched
     * by always giving it its intrinsic dimensions. If the wallpaper is larger than the
     * screen, it will simply get clipped but it won't impact performance.
     */
    private class ClippedDrawable extends Drawable {
        private final Drawable mWallpaper;

        public ClippedDrawable(Drawable wallpaper) {
            mWallpaper = wallpaper;
        }

        @Override
        public void setBounds(int left, int top, int right, int bottom) {
            super.setBounds(left, top, right, bottom);
            // Ensure the wallpaper is as large as it really is, to avoid stretching it
            // at drawing time
            mWallpaper.setBounds(left, top, left + mWallpaper.getIntrinsicWidth(),
                    top + mWallpaper.getIntrinsicHeight());
        }

        public void draw(Canvas canvas) {
            mWallpaper.draw(canvas);
        }

        public void setAlpha(int alpha) {
            mWallpaper.setAlpha(alpha);
        }

        public void setColorFilter(ColorFilter cf) {
            mWallpaper.setColorFilter(cf);
        }

        public int getOpacity() {
            return mWallpaper.getOpacity();
        }
    }