import java.util.Calendar;

import android.app.Activity;
import android.app.AlarmManager;
import android.app.PendingIntent;
import android.content.Intent;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.widget.EditText;
import android.widget.TimePicker;

public class MainActivity extends Activity {
	private EditText et_content;
	private TimePicker timePicker;
	
	//獲得鬧鐘管理者。
	private AlarmManager manager;
	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.activity_main);
		
		init();
	}
	
	private void init() {
		et_content = (EditText)findViewById(R.id.et_content);
		timePicker = (TimePicker)findViewById(R.id.timePicker);
		
		//初始化鬧鐘管理者。
		manager = (AlarmManager)getSystemService(ALARM_SERVICE);
		
	}
	
	public void setAlarm(View v){
		//備忘內容。
		String content = et_content.getText().toString();
		//鬧鐘的時間。
		
		int hour = timePicker.getCurrentHour();
		int minute = timePicker.getCurrentMinute();
		
		//獲得準確的時間。
		Calendar c = Calendar.getInstance();
		//c裡面的年月日都是ok的，我們要將c裡面的 小時和分鐘變成 設定的小時和分鐘。
		c.set(Calendar.HOUR_OF_DAY, hour);
		c.set(Calendar.MINUTE, minute);
		c.set(Calendar.SECOND, 0);
		//開始設定鬧鐘。
		
		/*
		 * 延遲意圖
		 * PendingIntent
		 * */
		
		
		//我們希望到點的時候，能夠啟動一個介面Activity，來顯示備忘內容。
		Intent intent = new Intent(this, AlarmActivity.class);
		intent.putExtra("msg", content);
		
		//將intent封裝到PendingIntent中。
		PendingIntent pi = PendingIntent.getActivity(MainActivity.this, 100, intent, PendingIntent.FLAG_ONE_SHOT);
		
		
		manager.set(AlarmManager.RTC_WAKEUP, c.getTimeInMillis(),  pi);
		
		
	}
	
	//點選，設定重複鬧鐘。
	public void setRepeatingAlarm(View v){
		
		Intent intent = new Intent(this, RepeatingAlarmActivity.class);
		intent.putExtra("msg", "重複的事情多次提醒！！！");
		
		PendingIntent pi = PendingIntent.getActivity(this, 101, intent, 0);
		
		//設定多次鬧鐘。
		/*manager.setRepeating(AlarmManager.RTC_WAKEUP, 
				triggerAtTime 第一次觸發的時間, 
				interval 間隔時間 , 
				pi);*/
		
		//假設當前時間15s之後，就開始第一次觸發；然後每隔20s再次觸發。
		Calendar c = Calendar.getInstance();
		c.set(Calendar.SECOND,  c.get(Calendar.SECOND) + 15);
		
		manager.setRepeating(AlarmManager.RTC_WAKEUP, 
				c.getTimeInMillis(), 
				20*1000, 
				pi);
		
	}
	

}
 

import android.app.Activity;
import android.app.AlarmManager;
import android.app.PendingIntent;
import android.content.Intent;
import android.media.MediaPlayer;
import android.os.Bundle;
import android.view.View;
import android.widget.TextView;

public class RepeatingAlarmActivity extends Activity {
	private TextView tv;
	private MediaPlayer player;
	private AlarmManager manager;

	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.activity_repeating_alarm);

		init();
	}

	private void init() {
		tv = (TextView) findViewById(R.id.tv);

		player = new MediaPlayer();

		try {
			player.reset();
			player.setDataSource("/mnt/sdcard/qf.mp3");
			player.prepare();
			player.start();
		} catch (Exception e) {
			e.printStackTrace();
		}
	}

	// 停止多次鬧鐘。
	public void stop(View v) {
		// 1,關音樂。
		player.reset();
		player.release();
		player = null;
		// 2,關介面。
		finish();
		//3，關閉多次鬧鐘。
		Intent intent = new Intent(this, RepeatingAlarmActivity.class);
		intent.putExtra("msg", "重複的事情多次提醒！！！");
		
		PendingIntent pi = PendingIntent.getActivity(this, 101, intent, 0);
		
		manager = (AlarmManager)getSystemService(ALARM_SERVICE);
		manager.cancel(pi);
		
	}

	// 繼續多次鬧鐘。
	public void resume(View v) {
		// 1,關音樂。
		player.reset();
		player.release();
		player = null;
		// 2,關介面。
		finish();
	}

	@Override
	protected void onDestroy() {
	
		super.onDestroy();
		if(player!=null){
			resume(null);
		}
		
	}
}
 

import android.app.Activity;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuItem;
import android.widget.TextView;

public class AlarmActivity extends Activity {
	private TextView tv;
	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.activity_alarm);
		
		tv = (TextView)findViewById(R.id.tv);
		String msg = getIntent().getStringExtra("msg");
		if(msg!=null){
			tv.setText(msg);
		}
		
		
	}

}