8.0上多个权限批量申请

//所需要申请的权限数组
    private static final String[] permissionsArray = new String[]{
            Manifest.permission.WRITE_EXTERNAL_STORAGE,
            Manifest.permission.READ_PHONE_STATE,
    };
    //还需申请的权限列表
    private List<String> permissionsList = new ArrayList<String>();
    //申请权限后的返回码
    private static final int REQUEST_CODE_ASK_PERMISSIONS = 1;


    private void checkRequiredPermission(final Activity activity) {
        for (String permission : permissionsArray) {
            if (ContextCompat.checkSelfPermission(activity, permission) != PackageManager.PERMISSION_GRANTED) {
                permissionsList.add(permission);
            } else {

            }
        }
        //申请权限
        if(permissionsList.size()!=0){

        ActivityCompat.requestPermissions(activity, permissionsList.toArray(new String[permissionsList.size()]), REQUEST_CODE_ASK_PERMISSIONS);
        }
    }

    @Override
    public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) {
        switch (requestCode) {
            case REQUEST_CODE_ASK_PERMISSIONS:
                for (int i = 0; i < permissions.length; i++) {
                    if (grantResults[i] == PackageManager.PERMISSION_GRANTED) {

                    } else {
                        Toast.makeText(getApplicationContext(), "权限被拒绝： " + permissions[i], Toast.LENGTH_SHORT).show();
                    }
                }
                initPdf();
                break;
            default:
                super.onRequestPermissionsResult(requestCode, permissions, grantResults);
        }
    }