Android闹钟开发

概述：简单闹钟的实现

• 通过点击按钮弹出日期时间对话框，选择日期时间并确定，会自动保存。当设置的时间一到就弹出一个新的Activity界面并弹出AlerDialog对话框播放系统闹钟声音。最后实现AlerDialog的取消与跳转。

主页面布局：activity.main.xml

MainActivity 的实现

public class MainActivity extends Activity {

	private Button btn;
	TextView tv;
	AlertDialog builder = null;
	Calendar c = Calendar.getInstance();

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

		c.get(Calendar.YEAR);
		c.get(Calendar.MONTH);
		c.get(Calendar.DAY_OF_MONTH);

		btn = (Button) findViewById(R.id.btnCalinder);
		tv = (TextView) findViewById(R.id.tv);
		btn.setOnClickListener(new OnClickListener() {

			@Override
			public void onClick(View v) {
				setAlarmDate();
			}
		});

	}
    /**
    
	 * 设置日期
	 * */
	private void setAlarmDate() {

		final Calendar currentDate = Calendar.getInstance();
		DatePickerDialog datePickerDialog = new DatePickerDialog(
				MainActivity.this, new DatePickerDialog.OnDateSetListener() {
					@Override
					public void onDateSet(DatePicker view, int year,
							int monthOfYear, int dayOfMonth) {

						c.set(Calendar.YEAR, year);
						c.set(Calendar.MONTH, monthOfYear);
						c.set(Calendar.DAY_OF_MONTH, dayOfMonth);
						setAlarmTime(year,monthOfYear,dayOfMonth);
					}
				}, currentDate.get(Calendar.YEAR), 
				currentDate.get(Calendar.MONTH),
				currentDate.get(Calendar.DAY_OF_MONTH));

		datePickerDialog.show();

	}

	/**
	 * 设置闹铃时间
	 * */
	private void setAlarmTime(final int year,
			final int monthOfYear, final int dayOfMonth) {
		Calendar currentTime = Calendar.getInstance();
		// 创建一个TimePickerDialog实例，并把它显示出来。
		new TimePickerDialog(MainActivity.this, 0, // 绑定监听器
				new TimePickerDialog.OnTimeSetListener() {
					@Override
					public void onTimeSet(TimePicker tp, int hourOfDay,
							int minute) {
						// 指定启动AlarmActivity组件
						Intent intent = new Intent();
						intent.setAction("com.westsoft.alarmtime.ACTION");// Activity
						// 创建PendingIntent对象
						PendingIntent pi = PendingIntent.getActivity(
								MainActivity.this, 0, intent, 0);
						Log.i("TimeInMillis", "TimeInMillis_1"+c.getTimeInMillis()+"");
						// 根据用户选择时间来设置Calendar对象
						c.set(Calendar.HOUR_OF_DAY, hourOfDay);
						c.set(Calendar.MINUTE, minute);

						String longTime=year+"-"+(monthOfYear+1)+"-"+dayOfMonth+" "+hourOfDay
								 + ":" + minute;
						//2016-10-25 10:44:53
						 tv.setText(longTime);

						// 设置AlarmManager将在Calendar对应的时间启动指定组件
						// 设置闹钟，当前时间就唤醒
						AlarmManager alarmManager = (AlarmManager) getSystemService(Service.ALARM_SERVICE);
						alarmManager.set(AlarmManager.RTC_WAKEUP,
								c.getTimeInMillis(), pi);
						
						
						Log.i("TimeInMillis", c.getTimeInMillis()+"");
						// 显示闹铃设置成功的提示信息
						Toast.makeText(MainActivity.this, "闹铃设置成功啦",
								Toast.LENGTH_SHORT).show();
					}
				}, currentTime.get(Calendar.HOUR_OF_DAY), currentTime
						.get(Calendar.MINUTE), true).show();
	}
}

闹钟Activity界面CallAlarm

public class CallAlarm extends Activity implements OnClickListener {

	public static CallAlarm context = null;
	private MediaPlayer player = new MediaPlayer();
	WakeLock mWakelock;

	@Override
	protected void onCreate(Bundle savedInstanceState) {

		super.onCreate(savedInstanceState);
		setContentView(R.layout.activity_login_welcome);

		// 需要在AndroidManifest里面设置权限，唤醒屏幕
		PowerManager pm = (PowerManager) getSystemService(Context.POWER_SERVICE);
		mWakelock = pm.newWakeLock(PowerManager.ACQUIRE_CAUSES_WAKEUP
				| PowerManager.FULL_WAKE_LOCK, "AlertDialog");
		mWakelock.acquire();

		// 屏幕解锁，需要设置权限
		KeyguardManager keyguardManager = (KeyguardManager) getSystemService(KEYGUARD_SERVICE);
		KeyguardLock keyguardLock = keyguardManager
				.newKeyguardLock("AlertDialog");
		keyguardLock.disableKeyguard();
		context = this;
		try {
			Uri localUri = RingtoneManager.getActualDefaultRingtoneUri(context,
					RingtoneManager.TYPE_ALARM);
			if ((player != null) && (localUri != null)) {
				player.setDataSource(context, localUri);
				player.prepare();
				player.setLooping(false);
				player.start();
			}

			AlertDialog.Builder localBuilder = new AlertDialog.Builder(context);
			localBuilder.setTitle("计划提醒通知来啦~");
			localBuilder.setMessage(getIntent().getStringExtra("content"));
			localBuilder.setPositiveButton("查看", this);
			localBuilder.setNegativeButton("忽略", this);
			localBuilder.show();

		} catch (IllegalArgumentException localIllegalArgumentException) {
			localIllegalArgumentException.printStackTrace();
		} catch (SecurityException localSecurityException) {
			localSecurityException.printStackTrace();
		} catch (IllegalStateException localIllegalStateException) {
			localIllegalStateException.printStackTrace();
		} catch (IOException e) {
			e.printStackTrace();
		}
	}

	@Override
	public void onClick(DialogInterface dialog, int which) {

		switch (which) {
		case DialogInterface.BUTTON1: {
			Intent intent = new Intent(CallAlarm.this, MainActivity.class);
			startActivity(intent); // 启动转到的Activity
			finish();
		}
		case DialogInterface.BUTTON2: {
			// mWakelock.release();
			player.stop();
			finish();
		}
		}
	}
}

参考demo请点击连接下载：下载本文参考demo