/**
 * 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, Bitmap.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, 90, fos);
            fos.flush();
            fos.close();

            Toast.makeText(getApplicationContext(), "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();
}