/*
* Android 闹钟
* Android API中提供了AlarmManager类，可以设置在指定的
* 时间运行某些动作。
* 主程序中以getSystemService(ALARM_SERVICE)取得AlarmManager
* 并利用set()和setRepeating()两个方法来实现两种不同类型的闹钟。
*
* 1.只响一次的闹钟：当点击“设置闹钟”按钮时，会触发Button的
* onClick事件，跳出TimePickerDialog来设置时间，设置完后，就以
* PendingIntent.getBroadcast()生成PendingIntent,再利用
* AlarmManager的set()将设置的时间与PendingIntent传入AlarmManager,
* 最后以Toast提示用户以完成设置，并改变屏幕上的设置时间。
*
* 2.重复响起的闹钟：当点击“设置闹钟”按钮时，会触发Button的
* onClick事件，跳出自定义的Layout的AlertDialog来设置开始时间与
* 重复间隔。设置完成后，以PendingIntent.getBroadcast()生成
* PendingIntent,再利用 AlarmManager的setReapting(),来设置开始
* 时间、重复间隔与与PendingIntent传入AlarmManager,最后以Toast
* 提示用户以完成设置，并改变屏幕上的设置时间。
*
* 程序中以cancel()这个方法来删除AlarmManager中设置的闹钟。
*/
import 略;
[java]
public class Ex06_10Activity extends Activity {
private TextView setTime1, setTime2;
private Button mButton1, mButton2, mButton3, mButton4;
private Calendar c = Calendar.getInstance();
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
// 只响一次闹钟设置
setTime1 = (TextView) findViewById(R.id.setTime1);
setTime2 = (TextView) findViewById(R.id.setTime2);
mButton1 = (Button) findViewById(R.id.mButton1);
mButton2 = (Button) findViewById(R.id.mButton2);
mButton3 = (Button) findViewById(R.id.mButton3);
mButton4 = (Button) findViewById(R.id.mButton4);
mButton1.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
// 取得单击按钮时的时间作为TimePickerDialog的默认值
c.setTimeInMillis(System.currentTimeMillis());
int mHour = c.get(Calendar.HOUR_OF_DAY);
int mMinute = c.get(Calendar.MINUTE);
// 跳出TimePickerDialog来设置时间
new TimePickerDialog(Ex06_10Activity.this,
new TimePickerDialog.OnTimeSetListener() {
@Override
public void onTimeSet(TimePicker view,
int hourOfDay, int minute) {
// TODO Auto-generated method stub
// 取得设置后的时间，秒跟毫秒设为0
c.setTimeInMillis(System.currentTimeMillis());
c.set(Calendar.HOUR_OF_DAY, hourOfDay);
c.set(Calendar.MINUTE, minute);
c.set(Calendar.SECOND, 0);
c.set(Calendar.MILLISECOND, 0);
// 指定闹钟设置的时间到时，要运行的CallAlarm.class
Intent intent = new Intent(
Ex06_10Activity.this, CallAlarm.class);
PendingIntent sender = PendingIntent
.getBroadcast(
Ex06_10Activity.this,
0,
intent,
PendingIntent.FLAG_UPDATE_CURRENT);
// AlarmManaer.RTC_WAKEUP设置服务在系统休眠时同样会运行
// 以set()设置的PendingIntent只会运行一次
AlarmManager am;
am = (AlarmManager) getSystemService(ALARM_SERVICE);
am.set(AlarmManager.RTC_WAKEUP,
c.getTimeInMillis(), sender);
// 更新显示的设置闹钟时间
String tmpS = format(hourOfDay) + ":"
+ format(minute);
setTime1.setText(tmpS);
Toast.makeText(Ex06_10Activity.this,
"设置的闹钟时间为：" + tmpS, Toast.LENGTH_LONG)
.show();
}
}, mHour, mMinute, true).show();
}
});
// 只响一次的闹钟删除
mButton2.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
Intent intent = new Intent(Ex06_10Activity.this,
CallAlarm.class);
PendingIntent sender = PendingIntent.getBroadcast(
Ex06_10Activity.this, 0, intent, 0);
AlarmManager am;
am = (AlarmManager) getSystemService(ALARM_SERVICE);
am.cancel(sender);
Toast.makeText(Ex06_10Activity.this, "闹钟已删除！",
Toast.LENGTH_LONG).show();
setTime1.setText("目前无设置！");
}
});
// 重复响起的闹钟设置/////////////////////////////////
// 重复响起的闹钟的设置画面，引用timeset.xml
LayoutInflater factory = LayoutInflater.from(this);
final View setView = factory.inflate(R.layout.timeset, null);
final TimePicker tPicker = (TimePicker) setView
.findViewById(R.id.tPicker);
tPicker.setIs24HourView(true);
final AlertDialog di = new AlertDialog.Builder(Ex06_10Activity.this)
.setIcon(R.drawable.clock).setTitle("设置").setView(setView)
.setPositiveButton("确定", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
// TODO Auto-generated method stub
// 取得设置的间隔秒数
EditText ed = (EditText) setView
.findViewById(R.id.mEdit);
int times = Integer.parseInt(ed.getText().toString()) * 1000;
// 取得设置后的时间，秒跟毫秒设为0
c.setTimeInMillis(System.currentTimeMillis());
c.set(Calendar.HOUR_OF_DAY, tPicker.getCurrentHour());
c.set(Calendar.MINUTE, tPicker.getCurrentMinute());
c.set(Calendar.SECOND, 0);
c.set(Calendar.MILLISECOND, 0);
// 指定闹钟设置的时间到时，要运行的CallAlarm.class
Intent intent = new Intent(Ex06_10Activity.this,
CallAlarm.class);
PendingIntent sender = PendingIntent.getBroadcast(
Ex06_10Activity.this, 1, intent, 0);
// setReapting()可让闹钟重复运行
AlarmManager am;
am = (AlarmManager) getSystemService(ALARM_SERVICE);
am.setRepeating(AlarmManager.RTC_WAKEUP,
c.getTimeInMillis(), times, sender);
// 更新显示的设置闹钟时间
String tmpS = format(tPicker.getCurrentHour()) + ":"
+ format(tPicker.getCurrentMinute());
setTime2.setText(tmpS);
Toast.makeText(
Ex06_10Activity.this,
"设置的闹钟时间为：" + tmpS + "\n重复时间间隔是:" + times
/ 1000+"秒", Toast.LENGTH_SHORT).show();
}
}).setNegativeButton("取消", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
// TODO Auto-generated method stub
}
}).create();
// 重复响起闹钟设置的按钮
mButton3.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
// 取得单击按钮时的时间作为tPicker的默认值
c.setTimeInMillis(System.currentTimeMillis());
tPicker.setCurrentHour(c.get(Calendar.HOUR_OF_DAY));
tPicker.setCurrentMinute(c.get(Calendar.MINUTE));
di.show();
}
});
// 重复响的闹钟 删除
mButton4.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
Intent intent = new Intent(Ex06_10Activity.this,
CallAlarm.class);
PendingIntent sender = PendingIntent.getBroadcast(
Ex06_10Activity.this, 1, intent, 0);
AlarmManager am;
am = (AlarmManager) getSystemService(ALARM_SERVICE);
am.cancel(sender);
Toast.makeText(Ex06_10Activity.this, "闹钟已删除！",
Toast.LENGTH_LONG).show();
setTime2.setText("目前无设置！");
}
});
}
private String format(int x) {
// TODO Auto-generated method stub
String s = "" + x;
if (s.length() == 1) {
s = "0" + s;
}
return s;
}
}
闹钟实际运行的动作AlarmAlert.java代码：
[java]
public class AlarmAlert extends Activity {
public void onCreate(Bundle SavedInstanceState) {
super.onCreate(SavedInstanceState);
new AlertDialog.Builder(AlarmAlert.this).setIcon(R.drawable.clock)
.setTitle("闹钟响了。。。").setMessage("快起床！！！")
.setPositiveButton("关闭", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
// TODO Auto-generated method stub
AlarmAlert.this.finish();
}
}).show();
}
}
调用闹钟Alert的Receive，CallAlarm.java代码：
[java]
public class CallAlarm extends BroadcastReceiver {
@Override
public void onReceive(Context context, Intent intent) {
// TODO Auto-generated method stub
Intent i = new Intent(context, AlarmAlert.class);
Bundle bundleRet = new Bundle();
bundleRet.putString("SRC_CALLER", "");
i.putExtras(bundleRet);
i.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
context.startActivity(i);
}
}
下面我们来看看布局代码：main.xml
[html]
<?xml version="1.0" encoding="utf-8"?>
<AbsoluteLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/layout1"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:background="@drawable/white" >
<DigitalClock
android:id="@+id/dClock"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_x="30dp"
android:layout_y="32dp"
android:textColor="@drawable/blue"
android:textSize="40sp" />
<TextView
android:id="@+id/text1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_x="10dp"
android:layout_y="90dp"
android:text="@string/str_title1"
android:textColor="@drawable/black"
android:textSize="20sp" />
<Button
android:id="@+id/mButton1"
android:layout_width="wrap_content"
android:layout_height="40dp"
android:layout_x="160dp"
android:layout_y="86dp"
android:text="@string/str_button1"
android:textColor="@drawable/black"
android:textSize="18sp" />
<TextView
android:id="@+id/text2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_x="10dp"
android:layout_y="227dp"
android:text="@string/str_title2"
android:textColor="@drawable/black"
android:textSize="20sp" />
<Button
android:id="@+id/mButton4"
android:layout_width="wrap_content"
android:layout_height="40dp"
android:layout_x="160dp"
android:layout_y="269dp"
android:text="@string/str_button2"
android:textColor="@drawable/black"
android:textSize="18sp" />
<Button
android:id="@+id/mButton2"
android:layout_width="wrap_content"
android:layout_height="40dp"
android:layout_x="160dp"
android:layout_y="140dp"
android:text="@string/str_button2"
android:textColor="@drawable/black"
android:textSize="18sp" />
<Button
android:id="@+id/mButton3"
android:layout_width="wrap_content"
android:layout_height="40dp"
android:layout_x="160dp"
android:layout_y="220dp"
android:text="@string/str_button1"
android:textColor="@drawable/black"
android:textSize="18sp" />
<TextView
android:id="@+id/setTime2"
android:layout_width="135dp"
android:layout_height="wrap_content"
android:layout_x="10dp"
android:layout_y="278dp"
android:text="@string/str_default"
android:textColor="@drawable/red"
android:textSize="16sp" />
<TextView
android:id="@+id/setTime1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_x="10dp"
android:layout_y="150dp"
android:text="@string/str_default"
android:textColor="@drawable/red"
android:textSize="16sp" />
</AbsoluteLayout>
timeset.xml代码：
[html]
<?xml version="1.0" encoding="utf-8"?>
<AbsoluteLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/layout2"
android:layout_width="fill_parent"
android:layout_height="fill_parent" >
<EditText
android:id="@+id/mEdit"
android:layout_width="52dp"
android:layout_height="46dp"
android:layout_x="112dp"
android:layout_y="188dp"
android:inputType="number"
android:text="10"
android:textSize="16sp" >
<requestFocus />
</EditText>
<TimePicker
android:id="@+id/tPicker"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_x="27dp"
android:layout_y="47dp" />
<TextView
android:id="@+id/text1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_x="14dp"
android:layout_y="17dp"
android:text="@string/str_text1"
android:textColor="@drawable/white"
android:textSize="16sp" />
<TextView
android:id="@+id/text2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_x="6dp"
android:layout_y="196dp"
android:text="@string/str_text2"
android:textColor="@drawable/white"
android:textSize="16sp" />
<TextView
android:id="@+id/text3"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_x="178dp"
android:layout_y="196dp"
android:text="@string/str_text3"
android:textColor="@drawable/white"
android:textSize="16sp" />
</AbsoluteLayout>
下面我们来看看程序运行后的结果：
AndroidManifest.xml里必须先添加CallAlarm的receiver设置，让应用程序在被启动时就先注册这个Receive。
</activity>
<activity android:name=".AlarmAlert" >
</activity>
作者：Jasonzhou613
