前言：在最近学习安卓通知功能的开发中，遇到了一些坑，困扰了我一些时间，搜集了大量资料写个博客总结一下，希望对大家有帮助。 

目录

一、启动项目闪退

1.1、问题详情

1.2、解决方法

二、点击通知无法跳转

2.1、问题详情

2.2、解决方法

三、通知功能完整代码

MainActivity

activity_main.xml

NotificationActivity 

---

一、启动项目闪退

1.1、问题详情

完整报错如下：

Caused by: java.lang.IllegalArgumentException: com.example.myapplication: Targeting S+ (version 31 and above) requires that one of FLAG_IMMUTABLE or FLAG_MUTABLE be specified when creating a PendingIntent. Strongly consider using FLAG_IMMUTABLE, only use FLAG_MUTABLE if some functionality depends on the PendingIntent being mutable, e.g. if it needs to be used with inline replies or bubbles. at android.app.PendingIntent.checkPendingIntent(PendingIntent.java:461) at android.app.PendingIntent.getActivityAsUser(PendingIntent.java:577) at android.app.PendingIntent.getActivity(PendingIntent.java:563) at android.app.PendingIntent.getActivity(PendingIntent.java:527) at com.example.myapplication.MainActivity.onCreate(MainActivity.java:46) at android.app.Activity.performCreate(Activity.java:8980) at android.app.Activity.performCreate(Activity.java:8958) at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1526) at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:4013) ... 13 more

1.2、解决方法

查阅了大量资料发现在创建PendingIntent的时候因为SDK的版本导致启动app闪退，需要根据不同系统版本创建带有不同flag的PendingIntent，代码如下：

PendingIntent pendingIntent;
if (android.os.Build.VERSION.SDK_INT >= android.os.Build.VERSION_CODES.S) {
    pendingIntent = PendingIntent.getActivity(this, 123, intent, PendingIntent.FLAG_IMMUTABLE);
} else {
    pendingIntent = PendingIntent.getActivity(this, 123, intent, PendingIntent.FLAG_ONE_SHOT);
}

二、点击通知无法跳转

2.1、问题详情

点击通知后无法进行跳转。

2.2、解决方法

需要在AndroidManifest.xml文件里面配置一下自己创建的实体类。

三、通知功能完整代码

MainActivity

package com.example.myapplication;

import androidx.appcompat.app.AppCompatActivity;
import androidx.core.app.NotificationCompat;

import android.app.Notification;
import android.app.NotificationChannel;
import android.app.NotificationManager;
import android.app.PendingIntent;
import android.content.Intent;
import android.graphics.BitmapFactory;
import android.graphics.Color;
import android.os.Build;
import android.os.Bundle;
import android.view.View;

public class MainActivity extends AppCompatActivity {

    private static final String TAG = "leo";

    public NotificationManager manager;

    public Notification notification;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        manager = (NotificationManager) getSystemService(NOTIFICATION_SERVICE);
        if(Build.VERSION.SDK_INT >= Build.VERSION_CODES.O){
            NotificationChannel channel = new NotificationChannel("leo","测试通知",NotificationManager.IMPORTANCE_HIGH);
            manager.createNotificationChannel(channel);
        }

        Intent intent = new Intent(this,NotificationActivity.class);
        PendingIntent pendingIntent;
        if (android.os.Build.VERSION.SDK_INT >= android.os.Build.VERSION_CODES.S) {
            pendingIntent = PendingIntent.getActivity(this, 123, intent, PendingIntent.FLAG_IMMUTABLE);
        } else {
            pendingIntent = PendingIntent.getActivity(this, 123, intent, PendingIntent.FLAG_ONE_SHOT);
        }

        notification = new NotificationCompat.Builder(this, "leo")
                .setContentTitle("官方通知")
                .setContentText("世界那么大，我想去看看")
                .setSmallIcon(R.drawable.baseline_star_rate_24)
                .setLargeIcon(BitmapFactory.decodeResource(getResources(),R.drawable.baseline_star_rate_24))
                .setColor(Color.parseColor("#ff0000"))
                .setContentIntent(pendingIntent)
                .setAutoCancel(true)
                .build();
    }

    public void sendNotification(View view){
        manager.notify(1,notification);
    }

    public void cancelNotification(View view){
        manager.cancel(1);

    }

}

activity_main.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical">

    <Button
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:onClick="sendNotification"
        android:text="发出通知"
        >
    </Button>

    <Button
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:onClick="cancelNotification"
        android:text="取消通知"
        >
    </Button>

</LinearLayout>

NotificationActivity 

package com.example.myapplication;

import android.app.Activity;
import android.os.Bundle;
import android.util.Log;

import androidx.annotation.Nullable;

public class NotificationActivity extends Activity {

    @Override
    protected void onCreate(@Nullable Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        Log.e("leo","onCreate：进步NotificationActivity");
    }
}

运行成功：