如何使用AlarmManager set（）設置警報

Question

我試圖在我的Android應用中設置鬧鍾。 但是失敗了。 我已經閱讀了一些教程，但是它們對我不起作用，我看不出我的錯誤在哪里。

這是我的代碼：

清單：

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.byethost6.jessy_barthelemy.planificate">

    <uses-permission android:name="com.android.alarm.permission.SET_ALARM"/>

    <application
        android:allowBackup="true"
        android:icon="@mipmap/ic_launcher"
        android:label="@string/app_name"
        android:supportsRtl="true"
        android:theme="@style/AppTheme">


        <activity android:name=".CreateTask"></activity>

        <receiver android:name="com.byethost6.jessy_barthelemy.planificate.HourReceiver" android:process=":remote"/>

    </application>

</manifest>

我這樣設置警報：

        AlarmManager alarmManager;
        PendingIntent alarmIntent;
        alarmManager = (AlarmManager)context.getSystemService(Context.ALARM_SERVICE);
        Intent intent = new Intent(context, HourReceiver.class);
        alarmIntent = PendingIntent.getBroadcast(context, 0, intent, PendingIntent.FLAG_ONE_SHOT);

        Calendar calendar = Calendar.getInstance();

        calendar.set(Calendar.HOUR_OF_DAY, hours);
        calendar.set(Calendar.MINUTE, minutes);


        alarmManager.set(AlarmManager.RTC_WAKEUP, calendar.getTimeInMillis(), alarmIntent);
        Toast.makeText(context, "Alarm set", Toast.LENGTH_SHORT).show();

這是我的廣播接收器：

package com.byethost6.jessy_barthelemy.planificate;

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

import com.byethost6.jessy_barthelemy.planificate.enumeration.TriggerEnum;
import com.byethost6.jessy_barthelemy.planificate.helper.Task;

public class HourReceiver extends BroadcastReceiver{
    @Override
    public void onReceive(Context context, Intent intent) {
        Toast.makeText(context, "ALARM TRIGGERED", Toast.LENGTH_LONG).show();
    }
}

請你幫助我好嗎？ :)

Answer 1

這是我在MainActivity警報

alarmManager = (AlarmManager)getApplicationContext().getSystemService(Context.ALARM_SERVICE);
Intent intent = new Intent(getApplicationContext(), MyBroadcastReceiver.class);
pendingIntent = PendingIntent.getBroadcast(getApplicationContext(), 0, intent, 0);

// Set the alarm to start at some time.
Calendar calendar = Calendar.getInstance();
calendar.setTimeInMillis(System.currentTimeMillis());
int curHr = calendar.get(Calendar.HOUR_OF_DAY);

// Checking whether current hour is over 14
if (curHr >= 13)
{
    // Since current hour is over 14, setting the date to the next day
    calendar.add(Calendar.DATE, 1);
}

calendar.set(Calendar.HOUR_OF_DAY, 13);
calendar.set(Calendar.MINUTE, 30);

// setRepeating() lets you specify a precise custom interval--in this case,
// every day
alarmManager.setRepeating(AlarmManager.RTC_WAKEUP, calendar.getTimeInMillis(),
                AlarmManager.INTERVAL_DAY, pendingIntent);

這是我的BroadcastReceiver

public class MyBroadcastReceiver extends BroadcastReceiver {

    @Override
    public void onReceive(Context context, Intent intent)
    {
        PowerManager pm = (PowerManager) context.getSystemService(Context.POWER_SERVICE);

        PowerManager.WakeLock wl = pm.newWakeLock(PowerManager.PARTIAL_WAKE_LOCK, "tag");

        //Acquire the lock
        wl.acquire();

        Log.v("ADebugTag", "It work!");

        //Release the lock
        wl.release();
    }
}

使用此代碼在日志中，您可以在警報觸發時看到“它起作用”！

清單

<uses-permission android:name="android.permission.WAKE_LOCK" />
<uses-permission android:name="com.android.alarm.permission.SET_ALARM" />
<receiver android:name=".MyBroadcastReceiver" />