Question

请考虑以下代码。我正在尝试打印与被关闭的通知的ID相对应的“已被关闭的通知＃[id]”。为什么如果我关闭通知＃1，则同时打印“通知＃1被关闭”和“通知＃2被关闭”？如果我关闭通知＃2，“通知＃0被取消”，为什么会打印并给出没有对应于id的值0的通知，为什么会显示？

我在哪里做错了？纠正方法是什么？

MainActivity.java

if (intent.hasExtra(EXTRA_MATCH)) {
                // clone the match object to prevent a concurrentModificationException
                Match originalMatch = intent.getParcelableExtra(EXTRA_MATCH);
                try {
                    match = (Match) originalMatch.clone();
                    FileUtils.writeMatchToFile(context, match);
                } catch (CloneNotSupportedException e) {
                    e.printStackTrace();
                }

                scoresFile = intent.getParcelableExtra(EXTRA_SCORES_FILE);
                if (scoresFile != null) {
                    FileUtils.writeScoresFile(context, scoresFile);
                }
            } else {
                return;
            }

OnCancelBroadcastReceiver.java

1
00:00:01.876 --> 00:00:02.709
<v Instructor>We can go back now</v>

2
00:00:02.709 --> 00:00:05.042
to our web server checklist.

3
00:00:06.410 --> 00:00:08.722
1- We've already seen better ways to organise our code

4
00:00:08.722 --> 00:00:11.545
into reusable pieces with modules,

5
00:00:11.545 --> 00:00:13.315
2- we've seen ways to deal with files,

6
00:00:13.315 --> 00:00:15.940
both synchronous and asynchronous,

7
00:00:15.940 --> 00:00:16.773
and buffers,

8
00:00:16.773 --> 00:00:18.325
both the built-in Node one

9
00:00:18.325 --> 00:00:20.380
and the ES6 buffers,

10
00:00:20.380 --> 00:00:22.485
and we've seen a way to deal with work

activity_main.xml

import android.app.NotificationManager;
import android.app.PendingIntent;
import android.content.Context;
import android.content.Intent;
import android.support.v4.app.NotificationCompat;
import android.support.v4.app.TaskStackBuilder;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;

public class MainActivity extends AppCompatActivity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        Button b1 = findViewById(R.id.button1);
        b1.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                alert(1);
                alert(2);
            }
        });
    }

    void alert(int id)
    {
        NotificationCompat.Builder mBuilder = new NotificationCompat.Builder(this);
        mBuilder.setSmallIcon(R.drawable.ic_launcher_foreground);
        mBuilder.setContentTitle("Notification Example");
        mBuilder.setContentText("Notification #" + Integer.toString(id));

        Intent resultIntent = new Intent(this, MainActivity.class);
        TaskStackBuilder stackBuilder = TaskStackBuilder.create(this);
        stackBuilder.addParentStack(MainActivity.class);

        // Adds the Intent that starts the Activity to the top of the stack
        stackBuilder.addNextIntent(resultIntent);
        PendingIntent resultPendingIntent = stackBuilder.getPendingIntent(0, PendingIntent.FLAG_UPDATE_CURRENT);
        mBuilder.setContentIntent(resultPendingIntent);

        Intent onCancelIntent = new Intent(this, OnCancelBroadcastReceiver.class);
        PendingIntent onDismissPendingIntent = PendingIntent.getBroadcast(this.getApplicationContext(), 0, onCancelIntent, 0);
        mBuilder.setDeleteIntent(onDismissPendingIntent);
        onCancelIntent.putExtra("id", id);
        sendBroadcast(onCancelIntent);

        NotificationManager mNotificationManager = (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);

        // notificationID allows you to update the notification later on.
        int notificationID = id;
        mNotificationManager.notify(notificationID, mBuilder.build());
    }
}

strings.xml

import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.widget.Toast;

public class OnCancelBroadcastReceiver extends BroadcastReceiver {
    @Override
    public void onReceive(Context context, Intent intent) {
        // Do your logic here
        int id = intent.getIntExtra("id", 0);

        Toast.makeText(context, "Notification #" + Integer.toString(id) + " has been dismissed", Toast.LENGTH_LONG).show();
    }

}

AndroidManifest.xml

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context=".MainActivity">

    <Button
        android:id="@+id/button1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="@string/notify" />

</RelativeLayout>

顺便说一下，NotificationCompat.Builder在更高版本的Android中不推荐使用（从哪个Android版本开始？）。还有其他选择吗？

Android /获取与被关闭的通知相对应的ID

0 个答案: