BroadcastReceiver中每分钟更新一次通知

import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.app.Notification;
import android.app.NotificationManager;
import android.app.PendingIntent;

public class MyBroadcastReceiver extends BroadcastReceiver {
    private static final int NOTIFICATION_ID = 1;

    @Override
    public void onReceive(Context context, Intent intent) {
        // 创建通知
        Notification.Builder builder = new Notification.Builder(context)
                .setSmallIcon(R.drawable.notification_icon)
                .setContentTitle("通知标题")
                .setContentText("通知内容");

        // 设置点击通知时的操作
        Intent notificationIntent = new Intent(context, MainActivity.class);
        PendingIntent pendingIntent = PendingIntent.getActivity(context, 0, notificationIntent, 0);
        builder.setContentIntent(pendingIntent);

        // 发送通知
        NotificationManager notificationManager = (NotificationManager) context.getSystemService(Context.NOTIFICATION_SERVICE);
        notificationManager.notify(NOTIFICATION_ID, builder.build());
    }
}

import android.app.AlarmManager;
import android.app.PendingIntent;
import android.content.Context;
import android.content.Intent;

public class MainActivity extends AppCompatActivity {
    private static final int INTERVAL_ONE_MINUTE = 60 * 1000;

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

        // 设置定时任务
        AlarmManager alarmManager = (AlarmManager) getSystemService(Context.ALARM_SERVICE);
        Intent intent = new Intent(this, MyBroadcastReceiver.class);
        PendingIntent pendingIntent = PendingIntent.getBroadcast(this, 0, intent, 0);
        alarmManager.setRepeating(AlarmManager.RTC_WAKEUP, System.currentTimeMillis(), INTERVAL_ONE_MINUTE, pendingIntent);
    }
}