// load image      try {        // get input stream        InputStream ims = getAssets().open("avatar.jpg");        // load image as Drawable        Drawable d = Drawable.createFromStream(ims, null);        // set image to ImageView        mImage.setImageDrawable(d);      }      catch(IOException ex) {        return;      }  

Bitmap bitmap;     try {        InputStream ims = this.getContext().getAssets().open("fl.jpg");        // 讀入圖片并將其強轉為 BitmapDrawable類型       BitmapDrawable bd = (BitmapDrawable) Drawable.createFromStream(ims, null);       bitmap = bd.getBitmap();       ims.close();     }      catch(IOException ex) {        return;      }      //canvas.drawBitmap(bitmap, -200, -200, new Paint());     canvas.drawBitmap(bitmap, null, new Rect(-30,-40,30,40), new Paint());//null表示原圖尺寸，第二個rect表示顯示區域（位圖會拉伸填充該區域）