android动态请求权限

/**
 * 动态请求权限
 */
private void requestPermission() {
    //动态请求权限
    if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
        if (checkSelfPermission(Manifest.permission.READ_EXTERNAL_STORAGE) != PackageManager.PERMISSION_GRANTED) {
            requestPermissions(
                    new String[]{Manifest.permission.READ_EXTERNAL_STORAGE},
                    REQUEST_CODE_READ_EXTERNAL_STORAGE_PERMISSIONS);
            requestPermissions(
                    new String[]{Manifest.permission.WRITE_EXTERNAL_STORAGE},
                    REQUEST_CODE_WRITE_EXTERNAL_STORAGE);
        }
    }
}