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android - 未调用 AlarmReceiver

问题描述

我制作了一个 android 应用程序，我想每天在特定时间获取本地通知。我使用 AlarmManager 和 BroadcastReceiver 来做到这一点。但问题是没有调用扩展 BroadCastReceiver 的 AlarmReceiver 类。我知道这是stackoverflow中的一个重复问题。我已经浏览了所有答案并尝试了所有方法，但仍然无法解决问题。

这是我的主要活动

package com.dileepmanuballa224.alarm_test;

import android.app.AlarmManager;
import android.app.PendingIntent;
import android.content.Context;
import android.content.Intent;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;

import java.util.Calendar;

public class MainActivity extends AppCompatActivity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
                Calendar calendar=Calendar.getInstance();
                calendar.set(Calendar.HOUR,9);
                AlarmManager alarmManager=(AlarmManager)getSystemService(Context.ALARM_SERVICE);
                Intent intent=new Intent(getApplicationContext(),AlarmReceiver.class);
                PendingIntent pendingIntent=PendingIntent.getActivity(getApplicationContext(),1,intent,0);
                alarmManager.setRepeating(AlarmManager.RTC_WAKEUP,calendar.getTimeInMillis(),AlarmManager.INTERVAL_DAY,pendingIntent);

    }
}

我的 AlarmReceiverClass

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


public class AlarmReceiver extends BroadcastReceiver {
    private static final String TAG = "alarm_test_check";

    @Override
    public void onReceive(Context context, Intent intent) {
        Toast.makeText(context,"AlarmReceiver called",Toast.LENGTH_SHORT).show();
        Log.d(TAG, "onReceive: called ");
    }
}

我的清单文件

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.dileepmanuballa224.alarm_test">
<uses-permission android:name="android.permission.SET_ALARM"/>
    <application
        android:allowBackup="true"
        android:icon="@mipmap/ic_launcher"
        android:label="@string/app_name"
        android:roundIcon="@mipmap/ic_launcher_round"
        android:supportsRtl="true"
        android:theme="@style/AppTheme">
        <activity android:name=".MainActivity">
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
        <receiver android:name=".AlarmReceiver"/>
        </application>

</manifest>

我正在 Android 'Nougat' 上测试这个应用程序。

标签： android

解决方案

要在 API 23 和更高版本中发出警报，您必须绕过打瞌睡。onReceive()并以 BroadcastReciver 的相同方式重复该警报设置警报为第二天 9 点添加此警报。检查下面的示例代码（取自此答案）以绕过 M 及以上的打瞌睡。

AlarmManager am;

Calendar calendar = Calendar.getInstance();

    calendar.add(Calendar.DAY_OF_MONTH, 1);

    calendar.set(Calendar.HOUR_OF_DAY, 9);
    calendar.set(Calendar.MINUTE, 0);
    calendar.set(Calendar.SECOND, 0);
    calendar.set(Calendar.MILLISECOND, 0);

    // Check if current time is smaller than cal time
    // otherwise notifications will come same day.
    if (System.currentTimeMillis() <= calendar.getTimeInMillis()) {

        SyncAlarm(context, calendar.getTimeInMillis());
    }


private void syncAlarm(Context context, long time) {
Intent intent = new Intent(this, YourBroadcastReceiver.class);

PendingIntent pendingIntent = PendingIntent.getBroadcast(context, 0, intent, 0);

if (Build.VERSION.SDK_INT >= 23) {
    // Wakes up the device in Doze Mode
    am.setExactAndAllowWhileIdle(AlarmManager.RTC_WAKEUP, time, // time in millis
    pending);
    } else if (Build.VERSION.SDK_INT >= 19) {
    // Wakes up the device in Idle Mode
    am.setExact(AlarmManager.RTC_WAKEUP, time, pending);
    } else {
    // Old APIs
    am.set(AlarmManager.RTC_WAKEUP, time, pending);
    } 
}

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