Android 应用获取通知栏权限

工具类 NotificationsUtils：

package com.xxx.ua.utils;

import android.annotation.SuppressLint;
import android.app.AppOpsManager;
import android.content.Context;
import android.content.pm.ApplicationInfo;

import java.lang.reflect.Field;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;

/**
 * Created by chitty on 2017/8/3.
 * 获取通知栏权限是否开启
 */

public class NotificationsUtils {
    private static final String CHECK_OP_NO_THROW = "checkOpNoThrow";
    private static final String OP_POST_NOTIFICATION = "OP_POST_NOTIFICATION";

    @SuppressLint("NewApi")
    public static boolean isNotificationEnabled(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 = null;
      /* Context.APP_OPS_MANAGER */
        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 (ClassNotFoundException e) {
            e.printStackTrace();
        } catch (NoSuchMethodException e) {
            e.printStackTrace();
        } catch (NoSuchFieldException e) {
            e.printStackTrace();
        } catch (InvocationTargetException e) {
            e.printStackTrace();
        } catch (IllegalAccessException e) {
            e.printStackTrace();
        }
        return false;
    }
}

在 Activity 中适当位置调用：

 if (NotificationsUtils.isNotificationEnabled(this)){
    LogUtils.i(TAG, "--> showPromptDialog -- 通知权限 已开启 = ");

 }else {
    LogUtils.i(TAG, "--> showPromptDialog -- 通知权限 未开启 = ");
    // TODO 弹框提示用户去设置，跳转到应用信息界面

 }