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();
}
}
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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);
}
}
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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);
}
}
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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();
}
}
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ObjectPool.java
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public
class
ObjectPool {
/** The alarm object. */
public
static
AlarmHelper mAlarmHelper;
}
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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
>
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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
>
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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