Question

我一直想弄清楚如何让用户为我的应用中的某个项目设置日期，然后在其设置的日期，让它在通知栏中发出通知，甚至当他们不在应用程序中时。

任何帮助都会很棒。感谢

Answer 1

您可以使用DatePicker从用户获取日期。使用警报管理器设置设置警报，然后使用onReceive方法构建通知。

AlarmManager alarmManager = (AlarmManager) getSystemService(Context.ALARM_SERVICE);

        Intent notificationIntent = new Intent("android.media.action.DISPLAY_NOTIFICATION");
        notificationIntent.addCategory("android.intent.category.DEFAULT");

        PendingIntent broadcast = PendingIntent.getBroadcast(this, 100, notificationIntent, PendingIntent.FLAG_UPDATE_CURRENT);

        Calendar cal = Calendar.getInstance();
        cal.add(Calendar.DATE, d);   // Date for your notification
        cal.add(Calendar.MONTH, m);   // Date for your notification
        cal.add(Calendar.YEAR, y);   // Date for your notification
        alarmManager.setExact(AlarmManager.RTC_WAKEUP, cal.getTimeInMillis(), broadcast);

创建一个新的java文件 AlarmReceiver.java 在清单中添加以下代码

 <receiver android:name=".AlarmReceiver">
            <intent-filter>
                <action android:name="android.media.action.DISPLAY_NOTIFICATION" />
                <category android:name="android.intent.category.DEFAULT" />
            </intent-filter>
        </receiver>

在AlarmReceiver.java

import android.app.Notification;
import android.app.NotificationManager;
import android.app.PendingIntent;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.support.v4.app.NotificationCompat;
import android.support.v4.app.TaskStackBuilder;

public class AlarmReceiver extends BroadcastReceiver{
    @Override
    public void onReceive(Context context, Intent intent) {
        Intent notificationIntent = new Intent(context, NotificationActivity.class);

        TaskStackBuilder stackBuilder = TaskStackBuilder.create(context);
        stackBuilder.addParentStack(NotificationActivity.class);
        stackBuilder.addNextIntent(notificationIntent);

        PendingIntent pendingIntent = stackBuilder.getPendingIntent(0, PendingIntent.FLAG_UPDATE_CURRENT);

        NotificationCompat.Builder builder = new NotificationCompat.Builder(context);

        Notification notification = builder.setContentTitle("Demo App Notification")
                .setContentText("New Notification From Demo App..")
                .setTicker("New Message Alert!")
                .setSmallIcon(R.mipmap.ic_launcher)
                .setContentIntent(pendingIntent).build();

        NotificationManager notificationManager = (NotificationManager) context.getSystemService(Context.NOTIFICATION_SERVICE);
        notificationManager.notify(0, notification);
    }
}

按日期向通知栏添加提醒

1 个答案: