简单闹钟程序

这个应用实现了简单的闹钟功能,关闭程序的状态中也可以进行闹钟的提醒.
遗留了一个问题:
如果我通过应用本身关闭程序,是可以实现我上述所说的功能,但是如果我在手机进程管理中实现应用程序的关闭操作,这个提醒就不起作用了,我很疑惑的是,我通过应用程序本身关闭了后,在进程中也是查看不到这个应用了的.所以哪位知道的帮留个言指点下,谢谢!!!!

ClockDemo.java:

package com.example.clock;

import java.util.Calendar;
import android.app.Activity;
import android.app.AlertDialog;
import android.app.TimePickerDialog;
import android.content.DialogInterface;
import android.os.Bundle;
import android.view.KeyEvent;
import android.view.View;
import android.widget.Button;
import android.widget.TimePicker;

public class ClockDemo extends Activity {

	private Button mSet;
	Calendar mCalendar = Calendar.getInstance();

	/** Called when the activity is first created. */
	@Override
	public void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.main);
		ObjectPool.mAlarmHelper = new AlarmHelper(this);
		mSet = (Button) findViewById(R.id.mSet);
		setListener();
	}

	public void setListener() {
		mSet.setOnClickListener(new View.OnClickListener() {
			public void onClick(View v) {
				mCalendar.setTimeInMillis(System.currentTimeMillis());
				int mHour = mCalendar.get(Calendar.HOUR_OF_DAY);
				int mMinute = mCalendar.get(Calendar.MINUTE);
				new TimePickerDialog(ClockDemo.this,
						new TimePickerDialog.OnTimeSetListener() {
							public void onTimeSet(TimePicker view,
									int hourOfDay, int minute) {
								mCalendar.setTimeInMillis(System
										.currentTimeMillis());
								mCalendar.set(Calendar.HOUR_OF_DAY, hourOfDay);
								mCalendar.set(Calendar.MINUTE, minute);
								mCalendar.set(Calendar.SECOND, 0);
								mCalendar.set(Calendar.MILLISECOND, 0);
								ObjectPool.mAlarmHelper.openAlarm(32, "ddd",
										"ffff", mCalendar.getTimeInMillis());
							}
						}, mHour, mMinute, true).show();
			}
		});
	}
	
	@Override
	public boolean onKeyDown(int keyCode, KeyEvent event) {
		if (keyCode == KeyEvent.KEYCODE_BACK) {
			showBackDialog();
			return true;
		}
		return super.onKeyDown(keyCode, event);
	}
	
	/** Give the tip when exit the application. */
	public void showBackDialog() {
		final AlertDialog.Builder builder = new AlertDialog.Builder(this);
		builder.setTitle("提示")
				.setIcon(R.drawable.icon)
				.setMessage("是否退出?")
				.setPositiveButton("sure",
						new DialogInterface.OnClickListener() {
							public void onClick(DialogInterface dialog,
									int which) {
								System.exit(0);
								android.os.Process
										.killProcess(android.os.Process
												.myPid());

								dialog.dismiss();
							}
						})
				.setNegativeButton("cancel",
						new DialogInterface.OnClickListener() {
							public void onClick(DialogInterface dialog,
									int which) {
								dialog.dismiss();
							}
						});
		AlertDialog ad = builder.create();
		ad.show();
	}

}

AlarmHelper.java:

package com.example.clock;

import android.app.AlarmManager;
import android.app.PendingIntent;
import android.content.Context;
import android.content.Intent;

public class AlarmHelper {

	private Context c;
	private AlarmManager mAlarmManager;

	public AlarmHelper(Context c) {
		this.c = c;
		mAlarmManager = (AlarmManager) c
				.getSystemService(Context.ALARM_SERVICE);
	}

	public void openAlarm(int id, String title, String content, long time) {
		Intent intent = new Intent();
		intent.putExtra("_id", id);
		intent.putExtra("title", title);
		intent.putExtra("content", content);
		intent.setClass(c, CallAlarm.class);
		PendingIntent pi = PendingIntent.getBroadcast(c, id, intent,
				PendingIntent.FLAG_UPDATE_CURRENT);
		mAlarmManager.set(AlarmManager.RTC_WAKEUP, time, pi);
	}

	public void closeAlarm(int id, String title, String content) {
		Intent intent = new Intent();
		intent.putExtra("_id", id);
		intent.putExtra("title", title);
		intent.putExtra("content", content);
		intent.setClass(c, CallAlarm.class);
		PendingIntent pi = PendingIntent.getBroadcast(c, id, intent, 0);
		mAlarmManager.cancel(pi);
	}
}

CallAlarm.java:

package com.example.clock;

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

public class CallAlarm extends BroadcastReceiver {
	@Override
	public void onReceive(Context context, Intent intent) {
		intent.setClass(context, AlarmAlert.class);
		intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
		context.startActivity(intent);
	}
}

AlarmAlert.java:

package com.example.clock;

import android.app.Activity;
import android.app.AlertDialog;
import android.content.DialogInterface;
import android.os.Bundle;

public class AlarmAlert extends Activity {

	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		new AlertDialog.Builder(AlarmAlert.this)
				.setIcon(R.drawable.clock)
				.setTitle("ddd")
				.setMessage("fff")
				.setPositiveButton("ddd",
						new DialogInterface.OnClickListener() {
							public void onClick(DialogInterface dialog,
									int whichButton) {
								System.exit(0);
								android.os.Process
										.killProcess(android.os.Process
												.myPid());
							}
						}).show();
	}

}

ObjectPool.java:

public class ObjectPool {


	/** The alarm object. */
	public static AlarmHelper mAlarmHelper;

}

main.xml:

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
	android:orientation="vertical" android:layout_width="fill_parent"
	android:layout_height="fill_parent">
	<DigitalClock android:id="@+id/dClock"
		android:layout_width="wrap_content" android:layout_height="wrap_content"
		android:textSize="40sp" android:textColor="@drawable/blue" />
	<Button android:id="@+id/mSet" android:layout_width="100dp"
		android:layout_height="wrap_content" android:text="@string/str_button1"
		android:textColor="@drawable/red" android:textSize="18sp" />
</LinearLayout>

最后贴个配置文件:

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
	package="com.example.clock" android:versionCode="1"
	android:versionName="1.0">
	<uses-sdk android:minSdkVersion="7" />
	<application android:icon="@drawable/icon" android:label="@string/app_name">
		<activity android:name=".ClockDemo" android:label="@string/app_name">
			<intent-filter>
				<action android:name="android.intent.action.MAIN" />
				<category android:name="android.intent.category.LAUNCHER" />
			</intent-filter>
		</activity>
		<receiver android:name=".CallAlarm" />
		<activity android:name=".AlarmAlert" android:label="@string/app_name" />
	</application>
</manifest>

看了那么多,估计某些人又嫌烦了,我只贴上代码的目的是希望大家能看代码,而不是电脑上下了一个又一个的源文件,只知道用而不关心其中的技术点,这样就不能举一番三了,O(∩_∩)O哈哈~
为了不同的同学,我还是贴上源文件吧在.....