Android App开发中将View或Drawable转为Bitmap的方法

  public static Bitmap convertViewToBitmap(View view, int bitmapWidth, int bitmapHeight){
    Bitmap bitmap = Bitmap.createBitmap(bitmapWidth, bitmapHeight, Bitmap.Config.ARGB_8888);
    view.draw(new Canvas(bitmap));
    
    return bitmap;
  }

public static Bitmap convertViewToBitmap(View view){
    view.buildDrawingCache();
　　　　Bitmap bitmap = view.getDrawingCache();
　　　　return bitmap; 
}

if (width <= 0 || height <= 0 ||(width * height * (opaque && !translucentWindow ? 2 : 4) > ViewConfiguration.get(mContext).getScaledMaximumDrawingCacheSize())) {  
         destroyDrawingCache();  
         return;  
 } 

public static Bitmap convertViewToBitmap(View view){
  　　　view.measure(MeasureSpec.makeMeasureSpec(0, MeasureSpec.UNSPECIFIED), MeasureSpec.makeMeasureSpec(0, MeasureSpec.UNSPECIFIED));
    view.layout(0, 0, view.getMeasuredWidth(), view.getMeasuredHeight());
    view.buildDrawingCache();
    Bitmap bitmap = view.getDrawingCache();

　　　　 return bitmap;
}

/** 
   * Bitmap转化为drawable 
   * @param bitmap 
   * @return 
   */  
   public static Drawable bitmap2Drawable(Bitmap bitmap){  
     return new BitmapDrawable(bitmap) ;  
   }  
     
   /** 
   * Drawable 转 bitmap 
   * @param drawable 
   * @return 
   */  
   public static Bitmap drawable2Bitmap(Drawable drawable){  
     if(drawable instanceof BitmapDrawable){  
       return ((BitmapDrawable)drawable).getBitmap() ;  
     }else if(drawable instanceof NinePatchDrawable){  
       Bitmap bitmap = Bitmap  
           .createBitmap(  
               drawable.getIntrinsicWidth(),  
               drawable.getIntrinsicHeight(),  
               drawable.getOpacity() != PixelFormat.OPAQUE ? Bitmap.Config.ARGB_8888  
                   : Bitmap.Config.RGB_565);  
       Canvas canvas = new Canvas(bitmap);  
       drawable.setBounds(0, 0, drawable.getIntrinsicWidth(),  
           drawable.getIntrinsicHeight());  
       drawable.draw(canvas);  
       return bitmap;  
     }else{  
       return null ;  
     }  
  }