Android 闹钟

/*
 * 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;

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. */@Overridepublic 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() {@Overridepublic 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() {@Overridepublic 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0c.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.classIntent 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() {@Overridepublic void onClick(View v) {// TODO Auto-generated method stubIntent 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.xmlLayoutInflater 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() {@Overridepublic 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0c.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.classIntent 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() {@Overridepublic 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() {@Overridepublic 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() {@Overridepublic void onClick(View v) {// TODO Auto-generated method stubIntent 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 stubString s = "" + x;if (s.length() == 1) {s = "0" + s;}return s;}}

闹钟实际运行的动作AlarmAlert.java代码：

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() {@Overridepublic void onClick(DialogInterface dialog, int which) {// TODO Auto-generated method stubAlarmAlert.this.finish();}}).show();}}

调用闹钟Alert的Receive，CallAlarm.java代码：

public class CallAlarm extends BroadcastReceiver {@Overridepublic void onReceive(Context context, Intent intent) {// TODO Auto-generated method stubIntent 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

<?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：

<?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>