Android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。
这里遗留了一个问题： 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
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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
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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
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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
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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
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public class ObjectPool { /** The alarm object. */ public static AlarmHelper mAlarmHelper;} |
main.xml
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<?xml version="1.0" encoding="utf-8"?> 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
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<?xml version="1.0" encoding="utf-8"?> 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。
为了不同的同学，还是贴上源文件吧在。
源码下载：ClockDemo.rar
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