DisplayMetrics dm = new DisplayMetrics();  
getWindowManager().getDefaultDisplay().getMetrics(dm);  
//屏幕寬度   
int widthPixels = dm.widthPixels;  
//屏幕高度   
int heightPixels = dm.heightPixels;   
 

// 圖片尺寸適應組件大小

private void showImg(ImageView view,Drawable img){
        int w=img.getIntrinsicWidth();
        int h=img.getIntrinsicHeight();
        Log.e("w", w+"/"+h);
        if(w>300)
        {
            int hh=300*h/w;
            Log.e("hh", hh+"");
            LayoutParams para=view.getLayoutParams();
            para.width=300;
            para.height=hh;
            view.setLayoutParams(para);
        }
        view.setImageDrawable(img);
    }