AlarmManager的简单使用

标题

偶然间翻到公司的祖传代码，发现AlarmManager这个东西，原来确实没用过，找了点资料自己学习了下，在这记录下

主AlarmManagerActivity 代码

package com.jph.simple;

import android.app.Activity;
import android.app.AlarmManager;
import android.app.PendingIntent;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.content.IntentFilter;
import android.os.Build;
import android.os.Bundle;
import android.support.annotation.Nullable;
import android.util.Log;
import android.view.View;
import android.widget.Toast;

import com.jph.simple.service.AlarmService;

import java.util.Calendar;

/**
 * Created by wyb on 2018/2/24.
 * <p>
 * FLAG_CANCEL_CURRENT:如果当前系统中已经存在一个相同的PendingIntent对象，那么就将先将已有的PendingIntent取消，然后重新生成一个PendingIntent对象。
 * <p>
 * FLAG_NO_CREATE:如果当前系统中不存在相同的PendingIntent对象，系统将不会创建该PendingIntent对象而是直接返回null。
 * <p>
 * FLAG_ONE_SHOT:该PendingIntent只作用一次。在该PendingIntent对象通过send()方法触发过后，PendingIntent将自动调用cancel()进行销毁，那么如果你再调用send()方法的话，系统将会返回一个SendIntentException。
 * <p>
 * FLAG_UPDATE_CURRENT:如果系统中有一个和你描述的PendingIntent对等的PendingInent，那么系统将使用该PendingIntent对象，但是会使用新的Intent来更新之前PendingIntent中的Intent对象数据，例如更新Intent中的Extras
 */

public class AlarmManagerActivity extends Activity {

    private AlarmManager alManager;
    private AlarmReceiver alarmReceiver;
    /******receiver_action*******/
    public final static String ALARM_RECEIVER_ACTION = "receiver_alarm_action";
    /******activity_action*******/
    public final static String ALARM_ACTIVITY_ACTION = "activity_alarm_action";
    @Override
    protected void onCreate(@Nullable Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.alarmmanager_layout);
        alManager = (AlarmManager) getSystemService(Context.ALARM_SERVICE);

//        System.out.println("----getLocalClassName---------" + getLocalClassName());
//        System.out.println("----getPackageName---------" + getPackageName());
//        System.out.println("----getComponentName---------" + getComponentName());
//        System.out.println("----getCallingPackage---------" + getCallingPackage());
//        System.out.println("----getTitle---------" + getTitle());

        /***********alarmManager广播注册*************/
        alarmReceiver = new AlarmReceiver();
        registerReceiver(alarmReceiver,new IntentFilter(ALARM_RECEIVER_ACTION));
    }

    /**
     * 开启定时任务
     * @param view
     */
    public void startAlarmTask(View view) {
        Log.d(getLocalClassName(), "--------------you clicked me!");
        //showToastByCalendar();
        //showToastByMillis();
        //showToastReceiver();
        showToastActivity();

    }


    /**
     * service
     * 定时到秒
     */
    void showToastByMillis() {
        Intent intent = new Intent(this, AlarmService.class);
        intent.setAction(AlarmService.ACTION_ALARM);
        PendingIntent pendingIntent = PendingIntent.getService(this, 0, intent, PendingIntent.FLAG_CANCEL_CURRENT);
        if (Build.VERSION.SDK_INT < 19) {
            alManager.set(AlarmManager.RTC_WAKEUP, System.currentTimeMillis() + 5000, pendingIntent);
        } else {
            alManager.setExact(AlarmManager.RTC_WAKEUP, System.currentTimeMillis() + 5000, pendingIntent);
        }
    }

    /**
     * serice
     * 定时到年月日
     */
    void showToastByCalendar() {
        //定时时间为2018年2月24日15点25分0秒
        Calendar calendar = Calendar.getInstance();
        calendar.set(Calendar.YEAR, 2018);
        calendar.set(Calendar.MONTH, Calendar.FEBRUARY);
        calendar.set(Calendar.DAY_OF_MONTH, 24);
        calendar.set(Calendar.HOUR_OF_DAY, 15);
        calendar.set(Calendar.MINUTE, 25);
        calendar.set(Calendar.SECOND, 0);

        Intent intent = new Intent(this, AlarmService.class);
        intent.setAction(AlarmService.ACTION_ALARM);
        PendingIntent pendingIntent = PendingIntent.getService(this, 0, intent, PendingIntent.FLAG_UPDATE_CURRENT);
        if (Build.VERSION.SDK_INT < 19) {
            alManager.set(AlarmManager.RTC_WAKEUP, calendar.getTimeInMillis(), pendingIntent);
        } else {
            alManager.setExact(AlarmManager.RTC_WAKEUP, calendar.getTimeInMillis(), pendingIntent);
        }
    }


    /**
     * BroadcastReceiver
     * 接收定时任务
     */
    void showToastReceiver(){

        Intent intent = new Intent();
        intent.setAction(ALARM_RECEIVER_ACTION);
        intent.putExtra("AlARMTASK","I am AlarmManager Timer Task by BroadcastReceiver");
        //sendBroadcast(intent); 这里不用写，否则会接收到两次
        PendingIntent pendingIntent = PendingIntent.getBroadcast(this, 0, intent, PendingIntent.FLAG_CANCEL_CURRENT);
        if (Build.VERSION.SDK_INT < 19) {
            alManager.set(AlarmManager.RTC_WAKEUP, System.currentTimeMillis() + 5000, pendingIntent);
        } else {
            alManager.setExact(AlarmManager.RTC_WAKEUP, System.currentTimeMillis() + 5000, pendingIntent);
        }

    }


    /**
     * activity
     * 接收定时任务
     */
    void showToastActivity(){
        Intent intent = new Intent(this,ReceiverAlarmTaskActivity.class);
        intent.setAction(ALARM_ACTIVITY_ACTION);
        intent.putExtra("AlARMTASK","I am AlarmManager Timer Task by Activity");
        PendingIntent pendingIntent = PendingIntent.getActivity(this, 0, intent, PendingIntent.FLAG_CANCEL_CURRENT);
        if (Build.VERSION.SDK_INT < 19) {
            alManager.set(AlarmManager.RTC_WAKEUP, System.currentTimeMillis() + 5000, pendingIntent);
        } else {
            alManager.setExact(AlarmManager.RTC_WAKEUP, System.currentTimeMillis() + 5000, pendingIntent);
        }
    }



    /********************************************广播接收定时任务************************************************************/
    public class AlarmReceiver extends BroadcastReceiver{

        @Override
        public void onReceive(Context context, Intent intent) {
            if (!intent.getAction().equals(ALARM_RECEIVER_ACTION)){
                return;
            }
            Toast.makeText(AlarmManagerActivity.this,intent.getStringExtra("AlARMTASK"),Integer.valueOf(1)).show();

        }
    }


    @Override
    protected void onDestroy() {
        super.onDestroy();
        if (alarmReceiver!=null){
            unregisterReceiver(alarmReceiver);
        }
    }
}

AlarmService

package com.jph.simple.service;

import android.app.Service;
import android.content.Intent;
import android.os.Handler;
import android.os.IBinder;
import android.os.Looper;
import android.util.Log;
import android.widget.Toast;

public class AlarmService extends Service {

    public static String ACTION_ALARM = "action_alarm";
    private Handler alarmHandler = new Handler(Looper.getMainLooper());

    public AlarmService() {
    }

    @Override
    public IBinder onBind(Intent intent) {
        // TODO: Return the communication channel to the service.
        return null;
    }

    @Override
    public int onStartCommand(Intent intent, int flags, int startId) {

        if (!intent.getAction().equals(ACTION_ALARM)){
            Log.d(getPackageName(),"--------no fitter action-------------");
        }

        alarmHandler.post(new Runnable() {
            @Override
            public void run() {
                Log.d(getPackageName(),"---------I am coming");
                Toast.makeText(AlarmService.this,"我是闹钟",Toast.LENGTH_SHORT).show();
            }
        });
        return super.onStartCommand(intent, flags, startId);
    }
}

---

AlarmManagerActivity 布局文件

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical">


    <Button
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:onClick="startAlarmTask"
        android:text="@string/start_alarmTask" />

</LinearLayout>

---

ReceiverAlarmTaskActivity代码

package com.jph.simple;

import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.widget.TextView;
import android.widget.Toast;

public class ReceiverAlarmTaskActivity extends AppCompatActivity {
    private TextView alarmTaskActivity_tv;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_receiver_alarm_task);
        alarmTaskActivity_tv = findViewById(R.id.alarmTaskActivity_tv);
        try {
            boolean actionIs = getIntent().getAction().equals(AlarmManagerActivity.ALARM_ACTIVITY_ACTION);
            if (actionIs){
                String taskString = getIntent().getStringExtra("AlARMTASK");
                Toast.makeText(this,taskString,Integer.valueOf(1)).show();
                alarmTaskActivity_tv.setText(taskString);
            }

        }catch (Exception e){
            e.printStackTrace();
        }

    }
}

布局文件

<?xml version="1.0" encoding="utf-8"?>
<android.support.constraint.ConstraintLayout 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"
    tools:context="com.jph.simple.ReceiverAlarmTaskActivity">

    <TextView
        android:id="@+id/alarmTaskActivity_tv"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginBottom="8dp"
        android:layout_marginEnd="8dp"
        android:layout_marginStart="8dp"
        android:layout_marginTop="8dp"
        android:text="TextView"
        android:textSize="@dimen/textview_22sp"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent" />
</android.support.constraint.ConstraintLayout>

---

清单文件

<activity
            android:name=".AlarmManagerActivity"
            android:launchMode="singleTop"
            android:screenOrientation="portrait"
            android:windowSoftInputMode="adjustPan" />

        <service
            android:name=".service.AlarmService"
            android:enabled="true"
            android:exported="false" />

        <activity android:name=".ReceiverAlarmTaskActivity">
            <intent-filter>
                <action android:name="activity_alarm_action" />
                <category android:name="android.intent.category.DEFAULT" />
            </intent-filter>
        </activity>

代码都很简单，看注释都应该可以看懂了