Android：AlarmManager没有被解雇 [英] Android: AlarmManager is not getting fired

问题描述

我正在尝试在将来的预定时间生成警报。下面是代码

I am trying to generate an alarm on a scheduled time in future. Below is the code

MainActivity.java

import android.app.AlarmManager;
import android.app.PendingIntent;
import android.content.Context;
import android.content.Intent;
import android.os.Bundle;
import android.support.design.widget.FloatingActionButton;
import android.support.design.widget.Snackbar;
import android.support.v7.app.AppCompatActivity;
import android.support.v7.widget.Toolbar;
import android.view.View;
import android.view.Menu;
import android.view.MenuItem;
import android.widget.Toast;

import java.util.GregorianCalendar;

public class MainActivity extends AppCompatActivity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
        setSupportActionBar(toolbar);

        FloatingActionButton fab = (FloatingActionButton) findViewById(R.id.fab);
        fab.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                Snackbar.make(view, "Replace with your own action", Snackbar.LENGTH_LONG)
                        .setAction("Action", null).show();
            }
        });
    }

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        // Inflate the menu; this adds items to the action bar if it is present.
        getMenuInflater().inflate(R.menu.menu_main, menu);
        return true;
    }

    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        // Handle action bar item clicks here. The action bar will
        // automatically handle clicks on the Home/Up button, so long
        // as you specify a parent activity in AndroidManifest.xml.
        int id = item.getItemId();

        //noinspection SimplifiableIfStatement
        if (id == R.id.action_settings) {
            return true;
        }

        return super.onOptionsItemSelected(item);
    }

    public void scheduleAlarm(View V)
    {
        // time at which alarm will be scheduled here alarm is scheduled at 1 day from current time,
        // we fetch  the current time in milliseconds and added 1 day time
        // i.e. 24*60*60*1000= 86,400,000   milliseconds in a day
        Long time = new GregorianCalendar().getTimeInMillis()+60*60*1000;

        // create an Intent and set the class which will execute when Alarm triggers, here we have
        // given AlarmReciever in the Intent, the onRecieve() method of this class will execute when
        // alarm triggers and
        //we will write the code to send SMS inside onRecieve() method pf Alarmreciever class
        Intent intentAlarm = new Intent(this, AlarmReciever.class);

        // create the object
        AlarmManager alarmManager = (AlarmManager) getSystemService(Context.ALARM_SERVICE);

        //set the alarm for particular time
        alarmManager.set(AlarmManager.RTC_WAKEUP,time, PendingIntent.getBroadcast(this,1,  intentAlarm, PendingIntent.FLAG_UPDATE_CURRENT));
        Toast.makeText(this, "Alarm Scheduled for Tommrrow", Toast.LENGTH_LONG).show();

    }
}

AlarmReceiever.java

public class AlarmReciever extends BroadcastReceiver
{
    @Override
    public void onReceive(Context context, Intent intent)
    {
        // TODO Auto-generated method stub


        // here you can start an activity or service depending on your need
        // for ex you can start an activity to vibrate phone or to ring the phone

       String message="Hi I will be there later, See You soon";// message to send

        // Show the toast  like in above screen shot
        Log.d("Alarm",message);
        Toast.makeText(context, "Alarm Triggered and SMS Sent", Toast.LENGTH_LONG).show();
    }

}

content_main.xml

content_main.xml

<LinearLayout
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:orientation="vertical"
    android:gravity="center_vertical"
    xmlns:android="http://schemas.android.com/apk/res/android">

    <TextView
        android:id="@+id/textView1"
        android:gravity="center_horizontal"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:text="Alarm Manager Example"
        android:textAppearance="?android:attr/textAppearanceLarge" />

    <Button
        android:id="@+id/button1"
        android:layout_marginTop="25dp"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:text="Schedule The Alarm"
        android:onClick="scheduleAlarm"/>

</LinearLayout>

清单

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="voice1.xxx.com.alarmcheck2" >

    <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=".MainActivity"
            android:label="@string/app_name"
            android:theme="@style/AppTheme.NoActionBar" >
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

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

        <receiver android:name=".AlarmReciever"/>
    </application>

</manifest>

我想在一分钟后生成警报，但不幸的是没有任何反应。我在这里做错了什么？另外，如何确定我的日程安排在电话重启/关闭然后再打开后仍能正常工作？

I am trying to generate the alarm after one minute, but unfortunately nothing is happening. What have I done wrong here? Also, how can I make sure my schedule will work even after a phone restart/ turned off then turned on?

推荐答案

我认为您在上面的代码中的任何地方都没有调用scheduleAlarm（）方法。为了即使在电话重启/关闭后仍能进行计划工作，则您必须收听 BOOT_COMPLETED 事件。对于监听引导编译，代码如下：-

I think you not called your scheduleAlarm() method any where in the code above. And for schedule work even after a phone restart/ turned off then you have to listen BOOT_COMPLETED event. For listen bootcompile the code is given below:-

您需要在清单中定义一个动作名称为 android.intent的接收器。 action.BOOT_COMPLETED 。

You need to define a receiver in manifest with action name android.intent.action.BOOT_COMPLETED.

<receiver android:name=".BootCompletedReceiver">
    <intent-filter>
        <action android:name="android.intent.action.BOOT_COMPLETED"/>
    </intent-filter>
</receiver>

请确保还包括完整的启动权限。

Make sure also to include the completed boot permission.

BroadcastReceiver-

BroadcastReceiver-

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

public class BootCompletedReceiver extends BroadcastReceiver {

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

    }
}

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