/**
     * 獲取和保存當前屏幕的截圖
     */
    private void GetandSaveCurrentImage() 
    { 
        //1.構建Bitmap 
        WindowManager windowManager = getWindowManager(); 
        Display display = windowManager.getDefaultDisplay(); 
        int w = display.getWidth(); 
        int h = display.getHeight(); 

        Bitmap Bmp = Bitmap.createBitmap( w, h, Config.ARGB_8888 );     

        //2.獲取屏幕 
        View decorview = this.getWindow().getDecorView();  
        decorview.setDrawingCacheEnabled(true);  
        Bmp = decorview.getDrawingCache();  

        String SavePath = getSDCardPath()+"/AndyDemo/ScreenImage";

        //3.保存Bitmap  
        try { 
            File path = new File(SavePath); 
            //文件 
            String filepath = SavePath + "/Screen_1.png"; 
            File file = new File(filepath); 
            if(!path.exists()){ 
                path.mkdirs(); 
            } 
            if (!file.exists()) { 
                file.createNewFile(); 
            } 

            FileOutputStream fos = null; 
            fos = new FileOutputStream(file); 
            if (null != fos) { 
                Bmp.compress(Bitmap.CompressFormat.PNG, 90, fos); 
                fos.flush(); 
                fos.close();   

                Toast.makeText(mContext, "截屏文件已保存至SDCard/AndyDemo/ScreenImage/下", Toast.LENGTH_LONG).show(); 
            } 

        } catch (Exception e) { 
            e.printStackTrace(); 
        } 
    } 

    /**
     * 獲取SDCard的目錄路徑功能
     * @return
     */
    private String getSDCardPath(){
        File sdcardDir = null;
        //判斷SDCard是否存在
        boolean sdcardExist = Environment.getExternalStorageState().equals(android.os.Environment.MEDIA_MOUNTED);
        if(sdcardExist){
            sdcardDir = Environment.getExternalStorageDirectory();
        }
        return sdcardDir.toString();
    }