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. */
	@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：

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：

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

<?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>