开发警报应用 [英] Develop Alarm Application

问题描述

我想开发一个报警的应用。 该应用程序应该是这样的：

I'd like develop an Alarm Application. The application should work like this:

• 启动它
• 活动让我的时间
• 我可以设置报警
• 我可以关闭应用程序
• 当报警时间已到，开始一个活动（即使设备处于锁定状态）

我试图去适应这个样本 https://github.com/commonsguy/cwac-wakeful但我不能启动一个活动时，报警时间已到。

I have tried to adapt this sample https://github.com/commonsguy/cwac-wakeful but I cannot launch an activity when the alarm time comes.

我用这个code设置的报警器（用于测试我都插在活动的的onCreate 方法，此code）：

I use this code to setup the alarm (for test I have inserted this code on an onCreate method of activity):

Intent intent = new Intent(this, OnAlarmReceiver.class);
PendingIntent pendingIntent = PendingIntent.getBroadcast(this, 0, intent, 0);
Calendar cal = Calendar.getInstance();
cal.add(Calendar.SECOND, 10);
AlarmManager alarm = (AlarmManager) getSystemService(Context.ALARM_SERVICE);
alarm.set(AlarmManager.ELAPSED_REALTIME_WAKEUP, cal.getTimeInMillis(),
            pendingIntent);

这是OnAlarmReceiver类：

this is the OnAlarmReceiver class:

public class OnAlarmReceiver extends BroadcastReceiver {

    @Override
    public void onReceive(Context context, Intent intent) {
        Log.i(ClockActivity.LOG_TAG, "OnAlarmReceiver::onReceive");
        WakefulIntentService.sendWakefulWork(context, AlarmService.class);
    }
}

这是服务类：

public class AlarmService extends WakefulIntentService {

    public AlarmService(String name) {
        super(name);
    }

    @Override
    protected void doWakefulWork(Intent intent) {
        Log.i(ClockActivity.LOG_TAG, "AlarmService::doWakefulWork");
        Intent newIntent = new Intent(getApplicationContext(), ClockActivity.class);
        newIntent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
        newIntent.setAction(ClockActivity.ALARM_ACTION);
        getApplicationContext().startActivity(newIntent);
    }
}

这是明显的，其中有设置服务和接收器的部分：

this is the portion of Manifest where are setup the service and the receiver:

<receiver android:name=".OnAlarmReceiver"></receiver>
<service android:name=".AlarmService"></service>

在doWakefulWork方法不会被调用！

the doWakefulWork method is never called!

推荐答案

我做了这个应用程序：

AlarmActivity.java

package com.foo;
import pack.breceiver.MyBroadcastReceiver;
import android.app.Activity;

import android.app.AlarmManager;
import android.app.PendingIntent;
import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.widget.EditText;
import android.widget.Toast;

import android.app.Activity;
import android.os.Bundle;

public class AlarmActivity extends Activity {
    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
    }

    public void startAlert(View view) {
        EditText text = (EditText) findViewById(R.id.time);
        int i = Integer.parseInt(text.getText().toString());
        Intent intent = new Intent(this, MyBroadcastReceiver.class);
        PendingIntent pendingIntent = PendingIntent.getBroadcast(
                this.getApplicationContext(), 234324243, intent, 0);
        AlarmManager alarmManager = (AlarmManager) getSystemService(ALARM_SERVICE);
        alarmManager.set(AlarmManager.RTC_WAKEUP, System.currentTimeMillis()
                + (i * 1000), pendingIntent);
        Toast.makeText(this, "Alarm set in " + i + " seconds",
                Toast.LENGTH_LONG).show();
    }
}

MyBroadcastReceiver.java

package pack.breceiver;

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


public class MyBroadcastReceiver extends BroadcastReceiver  {

    @Override
    public void onReceive(Context context, Intent intent) {
        Toast.makeText(context, "Don't panik but your time is up!!!!",
                Toast.LENGTH_LONG).show();

        /*// Vibrate the mobile phone
        Vibrator vibrator = (Vibrator) context.getSystemService(Context.VIBRATOR_SERVICE);
        vibrator.vibrate(2000);  */
    }
}

这篇关于开发警报应用的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！