efunbox-xyyf-mobile-android/app/src/main/java/com/edufound/mobile/util/NotificationUtil.java

package com.edufound.mobile.util;

import android.app.Activity;
import android.app.AlertDialog;
import android.app.AppOpsManager;
import android.app.NotificationManager;
import android.content.Context;
import android.content.DialogInterface;
import android.content.Intent;
import android.content.pm.ApplicationInfo;
import android.net.Uri;
import android.os.Build;
import android.support.annotation.RequiresApi;
import android.support.v4.app.NotificationManagerCompat;
import android.view.View;
import android.widget.TextView;

import com.edufound.mobile.R;

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

public class NotificationUtil {


    public static void choseNotification(Activity activity) {
        //如果是新应用，查询权限并且询问
        if (SPutil.getPrefInt(activity, SPutil.notificationType, 0) == 0) {
            if (NotificationUtil.areNotificationsEnabled(activity)) {
                //有权限
                SPutil.setPrefInt(activity, SPutil.notificationType, SPutil.NOTIFICATION_OPEN);
            } else {
                //没权限
                SPutil.setPrefInt(activity, SPutil.notificationType, SPutil.NOTIFICATION_CLOSE);
                NotificationUtil.showDialog(activity);
            }
        } else {
            //不是第一次新应用，如果设置了有权限，就设置系统默认的权限，不提示
            if (NotificationUtil.areNotificationsEnabled(activity)) {
                //有权限
                SPutil.setPrefInt(activity, SPutil.notificationType, SPutil.NOTIFICATION_OPEN);
            } else {
                //没权限
                SPutil.setPrefInt(activity, SPutil.notificationType, SPutil.NOTIFICATION_CLOSE);
            }
        }
    }


    private static boolean areNotificationsEnabled(Context context) {
        NotificationManagerCompat.from(context).areNotificationsEnabled();
        if (Build.VERSION.SDK_INT < Build.VERSION_CODES.KITKAT) {
            return true;
        }
        if (Build.VERSION.SDK_INT < Build.VERSION_CODES.O) {
            return isEnableV19(context);
        } else {
            return isEnableV26(context);
        }
    }


    @RequiresApi(api = Build.VERSION_CODES.KITKAT)
    private static boolean isEnableV19(Context context) {
        final String CHECK_OP_NO_THROW = "checkOpNoThrow";
        final String OP_POST_NOTIFICATION = "OP_POST_NOTIFICATION";
        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 = (int) opPostNotificationValue.get(Integer.class);
            return ((int) checkOpNoThrowMethod.invoke(mAppOps, value, uid, pkg) == AppOpsManager.MODE_ALLOWED);
        } catch (ClassNotFoundException e) {
        } catch (NoSuchMethodException e) {
        } catch (NoSuchFieldException e) {
        } catch (InvocationTargetException e) {
        } catch (IllegalAccessException e) {
        } catch (Exception e) {
        }
        return false;
    }


    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);
            Method sServiceField = notificationManager.getClass().getDeclaredMethod("getService");
            sServiceField.setAccessible(true);
            Object sService = sServiceField.invoke(notificationManager);

            Method method = sService.getClass().getDeclaredMethod("areNotificationsEnabledForPackage"
                    , String.class, Integer.TYPE);
            method.setAccessible(true);
            return (boolean) method.invoke(sService, pkg, uid);
        } catch (Exception e) {
            return true;
        }
    }


    private static void showDialog(final Activity act) {
        AlertDialog.Builder builder = new AlertDialog.Builder(act)
//                .setIcon(R.mipmap.ic_launcher)
                .setTitle("提示")
                .setMessage("检测到您没有打开通知权限，是否去打开")
                .setPositiveButton("确定", new DialogInterface.OnClickListener() {
                    @Override
                    public void onClick(DialogInterface dialogInterface, int i) {
                        dialogInterface.cancel();
                        Intent localIntent = new Intent();
                        localIntent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
                        if (Build.VERSION.SDK_INT >= 9) {
                            localIntent.setAction("android.settings.APPLICATION_DETAILS_SETTINGS");
                            localIntent.setData(Uri.fromParts("package", act.getPackageName(), null));
                        } else if (Build.VERSION.SDK_INT <= 8) {
                            localIntent.setAction(Intent.ACTION_VIEW);
                            localIntent.setClassName("com.android.settings",
                                    "com.android.settings.InstalledAppDetails");
                            localIntent.putExtra("com.android.settings.ApplicationPkgName",
                                    act.getPackageName());
                        }
                        act.startActivity(localIntent);
                    }
                }).setNegativeButton("取消", new DialogInterface.OnClickListener() {
                    @Override
                    public void onClick(DialogInterface dialog, int i) {
                        dialog.cancel();
                    }
                });
        builder.create().show();
    }
}