//动态访问权限弹窗
    public  Boolean checkPermission() {
        boolean isGranted = true;
        if (android.os.Build.VERSION.SDK_INT >= 23) {
            if (this.checkSelfPermission(Manifest.permission.WRITE_EXTERNAL_STORAGE) != PackageManager.PERMISSION_GRANTED) {
                isGranted = false;
            }
            if (this.checkSelfPermission(Manifest.permission.READ_EXTERNAL_STORAGE) !=PackageManager.PERMISSION_GRANTED) {
                isGranted = false;
            }
            Log.i("读写权限获取"," ： "+isGranted);
            if (!isGranted) {
                this.requestPermissions(
                        new String[]{Manifest.permission.ACCESS_COARSE_LOCATION, Manifest.permission
                                .ACCESS_FINE_LOCATION,
                                Manifest.permission.READ_EXTERNAL_STORAGE,
                                Manifest.permission.WRITE_EXTERNAL_STORAGE},
                        102);
            }
        }
        return isGranted;
    }