Question

我正在尝试在学院的android中创建一个小项目，用户可以选择从时间选择器对话框中选择时间，并根据所选时间向用户发出饮水通知并每15次重复一次但是，警报管理员模糊地使用了问题通知。有时候通知会按时发出，并且每隔15分钟就会重复一次，但是在午夜之后通知会停止。有时会有延迟发出通知。但是要弄清楚原因！帮助赞赏..这是必要的xml和java文件 activity_water.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"
    android:id="@+id/relative"
    tools:context="com.example.priyam.databaselogin.Water">
    <View
        android:layout_width="match_parent"
        android:layout_height="1dp"
        android:background="@android:color/darker_gray"
        android:layout_marginTop="70dp"
        />
    <LinearLayout
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:orientation="horizontal"
        android:layout_marginTop="15dp">
        <CheckBox
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:id="@+id/reminderWaterCheckbox"
            android:buttonTint="@color/red"/>
        <TextView
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_marginLeft="20dp"
            android:text="Remind me once at"
            android:textStyle="bold"/>
        <TextView
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_marginLeft="170dp"
            android:text="09:30 AM"
            android:textColor="@color/red"
            android:id="@+id/textViewTime"/>


    </LinearLayout>

</RelativeLayout>

water.java

import android.app.AlarmManager;
import android.app.PendingIntent;
import android.app.TimePickerDialog;
import android.content.Intent;
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.view.View;
import android.widget.CheckBox;
import android.widget.TextView;
import android.widget.TimePicker;
import android.widget.Toast;

import java.util.Calendar;

public class Water extends AppCompatActivity implements View.OnClickListener {
TextView time;
    CheckBox waterReminder;
    int h,m;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_water);
        setTitle("Water Reminder");
        getId();
        Toast.makeText(getApplicationContext(),"this",Toast.LENGTH_LONG).show();
    }
private void getId(){
    time=(TextView)findViewById(R.id.textViewTime);
    waterReminder=(CheckBox)findViewById(R.id.reminderWaterCheckbox);
    time.setOnClickListener(this);
}
private void showDialog(){
    TimePickerDialog timePickerDialog = new TimePickerDialog(this,
            new TimePickerDialog.OnTimeSetListener() {

                @Override
                public void onTimeSet(TimePicker view, int hourOfDay,
                                      int minute) {

                    h=hourOfDay;
                    m=minute;


                    Calendar calendar=Calendar.getInstance();
                    calendar.set(Calendar.HOUR_OF_DAY,h);
                    calendar.set(Calendar.MINUTE,m);
                    Intent intent=new Intent(getApplicationContext(),Notification_receiver.class);
                    PendingIntent pendingIntent=PendingIntent.getBroadcast(getApplicationContext(),100,intent,PendingIntent.FLAG_UPDATE_CURRENT);
                    AlarmManager alarmManager= (AlarmManager) getSystemService(ALARM_SERVICE);
                    alarmManager.setRepeating(AlarmManager.RTC_WAKEUP,calendar.getTimeInMillis(),AlarmManager.INTERVAL_FIFTEEN_MINUTES,pendingIntent);
                    time.setText(h+":"+m);






                }
            }, h, m, false);
    timePickerDialog.show();



}
    @Override
    public void onClick(View v) {
        showDialog();
    }


}

Notification_receiver.java

import android.app.NotificationManager;
import android.app.PendingIntent;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.media.RingtoneManager;
import android.net.Uri;
import android.support.v4.app.NotificationCompat;



public class Notification_receiver extends BroadcastReceiver {

    @Override
    public void onReceive(Context context, Intent intent) {

        NotificationManager notificationManager= (NotificationManager) context.getSystemService(Context.NOTIFICATION_SERVICE);
        Intent intent1=new Intent(context,DashBoard.class);
        intent1.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
        PendingIntent pendingIntent=PendingIntent.getActivity(context,100,intent1,PendingIntent.FLAG_UPDATE_CURRENT);
        NotificationCompat.Builder builder=new NotificationCompat.Builder(context)
                .setContentIntent(pendingIntent)
                .setSmallIcon(R.drawable.logo)
                .setContentTitle("Hitfit")
                .setContentText("Its time you gulped a glass of water!Stay hydrated,stay fit!")
                .setAutoCancel(true);
        builder.setVibrate(new long[] { 1000, 1000});
        Uri alarmSound = RingtoneManager.getDefaultUri(RingtoneManager.TYPE_NOTIFICATION);
        builder.setSound(alarmSound);
        notificationManager.notify(100,builder.build());
    }

    }

使用的最小sdkVersion是18

自从几天就坚持这一点。谢谢你！

Answer 1

在AlarmManager的文档中，您可以看到以下声明：

注意：从API 19开始，所有重复警报都不准确。如果您的应用程序需要精确的交付时间，那么它必须使用一次性精确警报，每次重新安排如上所述。 targetSdkVersion早于API 19的旧应用程序将继续将所有警报（包括重复警报）视为完全警报。

我认为你实际上就是这种情况，并且你的警报并不准确，因为这是系统保持电池API 19的方式。

android中的报警管理器不会按时发出通知

1 个答案: