(转)Android中截取当前屏幕图片

该篇文章是说明在Android手机或平板电脑中如何实现截取当前屏幕的功能，并把截取的屏幕保存到SDCard中的某个目录文件夹下面。实现的代码如下：

    /**
     * 获取和保存当前屏幕的截图
     */
    private void GetandSaveCurrentImage()
    {
        //1.构建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.获取屏幕
        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, , 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();
        }
    }  

    /**
     * 获取SDCard的目录路径功能
     * @return
     */
    private String getSDCardPath(){
        File sdcardDir = null;
        //判断SDCard是否存在
        boolean sdcardExist = Environment.getExternalStorageState().equals(android.os.Environment.MEDIA_MOUNTED);
        if(sdcardExist){
            sdcardDir = Environment.getExternalStorageDirectory();
        }
        return sdcardDir.toString();
    }

由于要对SDCard进行操作，所以别忘记了在manifest.xml文件中赋以对SDCard的读写权限：

<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>