Android中打开手机通知权限设置

参考网址：关于安卓判断通知权限_水很清的博客-CSDN博客 

参考网址：https://blog.csdn.net/u012556114/article/details/120319874

 通过以下代码可直接跳转到项目的通知权限设置界面

public class NotifyManagerUtils {
    private static final String CHECK_OP_NO_THROW = "checkOpNoThrow";
    private static final String OP_POST_NOTIFICATION = "OP_POST_NOTIFICATION";
 
    //调用该方法获取是否开启通知栏权限
    public static boolean isNotifyEnabled(Context context) {
        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
            return isEnableV26(context);
        } else {
            return isEnabledV19(context);
        }
    }
 
    /**
     * 8.0以下判断
     *
     * @param context api19  4.4及以上判断
     * @return
     */
    private static boolean isEnabledV19(Context context) {
        AppOpsManager mAppOps =
                (AppOpsManager) context.getSystemService(Context.APP_OPS_SERVICE);
        ApplicationInfo appInfo = context.getApplicationInfo();
        String pkg = context.getApplicationContext().getPackageName();
        int uid = appInfo.uid;
        Class appOpsClass;
        try {
            appOpsClass = Class.forName(AppOpsManager.class.getName());
            Method checkOpNoThrowMethod =
                    appOpsClass.getMethod(CHECK_OP_NO_THROW,
                            Integer.TYPE, Integer.TYPE, String.class);
            Field opPostNotificationValue = appOpsClass.getDeclaredField(OP_POST_NOTIFICATION);
            int value = (Integer) opPostNotificationValue.get(Integer.class);
            return ((Integer) checkOpNoThrowMethod.invoke(mAppOps, value, uid, pkg) ==
                    AppOpsManager.MODE_ALLOWED);
        } catch (Exception e) {
            e.printStackTrace();
            return true;
        }
    }
 
 
    /**
     * 8.0及以上通知权限判断
     *
     * @param context
     * @return
     */
    private static boolean isEnableV26(Context context) {
        ApplicationInfo appInfo = context.getApplicationInfo();
        String pkg = context.getApplicationContext().getPackageName();
        int uid = appInfo.uid;
        try {
            NotificationManager notificationManager = (NotificationManager)
                    context.getSystemService(Context.NOTIFICATION_SERVICE);
            @SuppressLint("DiscouragedPrivateApi")
            Method sServiceField = notificationManager.getClass().getDeclaredMethod("getService");
            sServiceField.setAccessible(true);
            Object sService = sServiceField.invoke(notificationManager);
            Method method = null;
            if (sService != null) {
                method = sService.getClass().getDeclaredMethod("areNotificationsEnabledForPackage"
                        , String.class, Integer.TYPE);
                method.setAccessible(true);
            }
            return (boolean) method.invoke(sService, pkg, uid);
        } catch (Exception e) {
            return true;
        }
    }
 
    /**
     * 打开通知权限
     *
     * @param context
     */
    public static void openNotificationSettingsForApp(Context context) {
        // Links to this app's notification settings.
        if (isNotifyEnabled(context))
            return;
        Intent intent = new Intent();
        intent.setAction("android.settings.APP_NOTIFICATION_SETTINGS");
        intent.putExtra("app_package", context.getPackageName());
        intent.putExtra("app_uid", context.getApplicationInfo().uid);
        // for Android 8 and above
        intent.putExtra("android.provider.extra.APP_PACKAGE", context.getPackageName());
        context.startActivity(intent);
    }
}