android 动态请求权限笔记

/*** * 请求权限 *MainActivity */private void requestPermission() {    String[] permissionss = new String[]{            Manifest.permission.READ_EXTERNAL_STORAGE,            Manifest.permission.WRITE_EXTERNAL_STORAGE    };    if (!checkPermissionAllGranted(permissionss))        this.requestPermissions(permissionss, 10000);}/** * 检查是否拥有指定的所有权限 */private boolean checkPermissionAllGranted(String[] permissions) {    for (String permission : permissions) {        if (this.checkSelfPermission(permission) != PackageManager.PERMISSION_GRANTED) {            // 只要有一个权限没有被授予, 则直接返回 false            return false;        }    }    return true;}@Overridepublic void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) {    super.onRequestPermissionsResult(requestCode, permissions, grantResults);    if (requestCode == 10000) {        if (grantResults[0] == PackageManager.PERMISSION_GRANTED && grantResults.length > 0) {            Toast.makeText(MainActivity.this, "允许", Toast.LENGTH_LONG).show();        } else {            Toast.makeText(MainActivity.this, "用户拒绝", Toast.LENGTH_LONG).show();        }    }}