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
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; }
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。
源码下载：http://xiazai.jb51.net/201607/yuanma/ClockDemo(jb51.net).rar
以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持脚本之家。