ThreeGames/app/src/main/java/com/jyc/threegames/utils/NotificationUtils.java

package com.jyc.threegames.utils;

import android.app.AppOpsManager;
import android.app.Notification;
import android.app.NotificationChannel;
import android.app.NotificationManager;
import android.content.Context;
import android.content.Intent;
import android.content.pm.ApplicationInfo;
import android.graphics.BitmapFactory;
import android.graphics.Color;
import android.net.Uri;
import android.os.Build;
import android.provider.Settings;

import androidx.core.app.NotificationCompat;

import com.jyc.threegames.R;

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

import static android.content.Context.NOTIFICATION_SERVICE;

public class NotificationUtils {
    public static Notification GET_NOTIFICATION(Context context, String tittle, String body){
        if (android.os.Build.VERSION.SDK_INT >= android.os.Build.VERSION_CODES.O) {
            NotificationChannel channel =new NotificationChannel("three_game_important",
            "three_game", NotificationManager.IMPORTANCE_HIGH);
//            channel.enableLights(true);
//            channel.setLightColor(Color.RED);
//            channel.setShowBadge(true);
            ((NotificationManager)context.getSystemService(NOTIFICATION_SERVICE)).createNotificationChannel(channel);
        }

        NotificationCompat.Builder build = new NotificationCompat.Builder(context, "three_game_important");
        build.setContentTitle(tittle);
        build.setContentText(body);
        build.setTicker(tittle);
//        if (android.os.Build.VERSION.SDK_INT >= Build.VERSION_CODES.N)
//            build.setPriority(NotificationManager.IMPORTANCE_MAX);
//        else
//            build.setPriority(Notification.PRIORITY_HIGH);
//        build.setAutoCancel(true);
//        build.setWhen(System.currentTimeMillis());
//        build.setDefaults(Notification.DEFAULT_ALL);
        build.setSmallIcon(R.mipmap.ic_launcher);
//        build.setLargeIcon(BitmapFactory.decodeResource(context.getResources(), R.mipmap.ic_launcher));

        return build.build();
    }

    private static final String CHECK_OP_NO_THROW = "checkOpNoThrow";
    private static final String OP_POST_NOTIFICATION = "OP_POST_NOTIFICATION";

    public static boolean IS_NOTIFICATION_ENABLE(Context context) {
        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
            ///< 8.0手机以上
            if (((NotificationManager) context.getSystemService(Context.NOTIFICATION_SERVICE)).getImportance() == NotificationManager.IMPORTANCE_NONE) {
                return false;
            }
        }

        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;
        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 false;
    }

    public static void REQUEST_NOTIFY(Context context) {
        /**
         * 跳到通知栏设置界面
         * @param context
         */
        Intent localIntent = new Intent();
        ///< 直接跳转到应用通知设置的代码
        if (android.os.Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
            localIntent.setAction(Settings.ACTION_APP_NOTIFICATION_SETTINGS);
            localIntent.putExtra(Settings.EXTRA_APP_PACKAGE, context.getPackageName());
        }
        else if (android.os.Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP &&
                android.os.Build.VERSION.SDK_INT < Build.VERSION_CODES.O) {
            localIntent.setAction("android.settings.APP_NOTIFICATION_SETTINGS");
            localIntent.putExtra("app_package", context.getPackageName());
            localIntent.putExtra("app_uid", context.getApplicationInfo().uid);
        } else if (android.os.Build.VERSION.SDK_INT == Build.VERSION_CODES.KITKAT) {
            localIntent.setAction(Settings.ACTION_APPLICATION_DETAILS_SETTINGS);
            localIntent.addCategory(Intent.CATEGORY_DEFAULT);
            localIntent.setData(Uri.parse("package:" + context.getPackageName()));
        } else {
            ///< 4.4以下没有从app跳转到应用通知设置页面的Action，可考虑跳转到应用详情页面,
            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", context.getPackageName(), null));
            } else if (Build.VERSION.SDK_INT <= 8) {
                localIntent.setAction(Intent.ACTION_VIEW);
                localIntent.setClassName("com.android.settings", "com.android.setting.InstalledAppDetails");
                localIntent.putExtra("com.android.settings.ApplicationPkgName", context.getPackageName());
            }
        }
        context.startActivity(localIntent);
    }
}