通知权限 开启

获取 通知权限 状态

//获取通知权限状态
NotificationManagerCompat manager = NotificationManagerCompat.from(this);
boolean isOpened = manager.areNotificationsEnabled();//false=未开启，true=开启

开启 通知权限

//开启 通知权限
try {
    Intent intent = new Intent();
    intent.setAction(Settings.ACTION_CHANNEL_NOTIFICATION_SETTINGS);

    if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
        //这种方案适用于 API 26, 即8.0（含8.0）以上可以用
        intent.putExtra(Settings.EXTRA_APP_PACKAGE, getPackageName());
        intent.putExtra(Settings.EXTRA_CHANNEL_ID, CHANNEL_ID);
    } else if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP && Build.VERSION.SDK_INT <= Build.VERSION_CODES.N_MR1) {
        //这种方案适用于 API21-25，即 5.0-7.1 之间的版本可以使用
        intent.putExtra("app_package", getPackageName());
        intent.putExtra("app_uid", CHANNEL_ID);
    }
    startActivity(intent);
} catch (Exception e) {
    // 出现异常则跳转到应用设置界面
    Intent intent = new Intent();
    intent.setAction(Settings.ACTION_APPLICATION_DETAILS_SETTINGS);
    Uri uri = Uri.fromParts("package", getApplication().getPackageName(), null);
    intent.setData(uri);
    startActivity(intent);
}