定时提醒

由于上班一坐就是一天，有时候忘记喝水，导致眼睛很是劳累。为了更好地休息，今天忙里偷闲花了些功夫写了个每间隔一段时间就播放一段音乐来提醒休息的应用，啥都不说了，粘代码吧

还是的把用到的资源给做个介绍吧

播放文件：我放到res/raw/yixiu.mp3 是动画片聪明的一休里的片段

先来个截图:

接着看看代码的实现吧

AndroidManifest.xml

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.wind.internaltip"
    android:versionCode="1"
    android:versionName="1.0" >

    <uses-sdk
        android:minSdkVersion="8"
        android:targetSdkVersion="17" />

    <application
        android:allowBackup="true"
        android:icon="@drawable/ic_launcher"
        android:label="@string/app_name"
        android:theme="@style/AppTheme" >
        <activity
            android:name="com.wind.internaltip.InternalTip"
            android:label="@string/app_name" >
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
        
        <service
            android:name="com.wind.internaltip.TipService">
            <intent-filter>
                <action android:name="com.wind.interanltip.SERVICE" />
            </intent-filter>
        </service>
    </application>

</manifest>

layout文件：activity_internal_tip.xml

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:paddingBottom="@dimen/activity_vertical_margin"
    android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin"
    tools:context=".InternalTip" >

    <TextView
        android:id="@+id/textView1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="@string/hello_world" />

    <CheckBox
        android:id="@+id/checkBox1"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_alignParentLeft="true"
        android:layout_below="@+id/textView1"
        android:text="@string/turn_on" />

    <EditText
        android:id="@+id/editText1"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_alignLeft="@+id/checkBox1"
        android:layout_below="@+id/checkBox1"
        android:hint="@string/input_time_tip"
        android:ems="10" >
        <requestFocus />
    </EditText>

    <Button
        android:id="@+id/button1"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_alignRight="@+id/textView1"
        android:layout_below="@+id/editText1"
        android:text="@string/ok" />

</RelativeLayout>

主类：InternalTip.java

package com.wind.internaltip;

import android.os.Bundle;
import android.app.Activity;
import android.content.Intent;
import android.content.SharedPreferences;
import android.util.Log;
import android.view.Menu;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.CheckBox;
import android.widget.CompoundButton;
import android.widget.CompoundButton.OnCheckedChangeListener;
import android.widget.EditText;

public class InternalTip extends Activity {
	public static final int DEFAULE_INTERNAL_TIME =  60 * 60; //unit is second
	public static final int INVALID = -1;
	protected static final String TAG = null;
	static String PREFS_NAME = "data";
	
	private EditText mInternalTimer;
	private Button mOK;
	private CheckBox mTurnOn;
	
	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.activity_internal_tip);
		findViewById();
		addListenerForView();
		SharedPreferences sharedata = getSharedPreferences(InternalTip.PREFS_NAME, 0);
		boolean turn_on = sharedata.getBoolean("turn_on", false);
		mTurnOn.setChecked(turn_on);
	}
	
	private void findViewById() {
		mInternalTimer = (EditText) this.findViewById(R.id.editText1);
		mOK = (Button) this.findViewById(R.id.button1);
		mTurnOn = (CheckBox) this.findViewById(R.id.checkBox1);
	}
	
	private void addListenerForView() {
		mTurnOn.setOnCheckedChangeListener(new OnCheckedChangeListener(){

			@Override
			public void onCheckedChanged(CompoundButton buttonView,
					boolean isChecked) {
				if(isChecked){
					SharedPreferences.Editor sharedata = getSharedPreferences(PREFS_NAME, MODE_PRIVATE).edit();
					   sharedata.putBoolean("turn_on", true);
					   sharedata.commit();
				}else{
					SharedPreferences.Editor sharedata = getSharedPreferences(PREFS_NAME, MODE_PRIVATE).edit();
					   sharedata.putBoolean("turn_on", false);
					   sharedata.commit();
				}
			}
			
		});
		
		mOK.setOnClickListener(new OnClickListener(){

			@Override
			public void onClick(View v) {
				if(!mTurnOn.isChecked()){
					Log.v(TAG, "mTurnOn isChecked");
					finish();
				}
				int internal_time;
				if(mInternalTimer.getText().toString().trim().length() == 0){
					internal_time = DEFAULE_INTERNAL_TIME; 
				}else{
					try {
						internal_time = Integer.valueOf(mInternalTimer.getText().toString()).intValue() * 60;
					} catch (NumberFormatException e) {
						internal_time = DEFAULE_INTERNAL_TIME;
						e.printStackTrace();
					}
				}

				SharedPreferences.Editor sharedata = getSharedPreferences(PREFS_NAME, MODE_PRIVATE).edit();
				   sharedata.putInt("interanl_time", internal_time * 1000);
				   sharedata.commit();
				Intent intent = new Intent("com.wind.interanltip.SERVICE");
				InternalTip.this.startService(intent);
				finish();
			}
			
		});
	}

	

	@Override
	public boolean onCreateOptionsMenu(Menu menu) {
		// Inflate the menu; this adds items to the action bar if it is present.
		getMenuInflater().inflate(R.menu.internal_tip, menu);
		return true;
	}

}

服务类：TipService.java

package com.wind.internaltip;

import java.io.IOException;
import java.util.Date;
import android.annotation.SuppressLint;
import android.app.Service;
import android.content.Intent;
import android.content.SharedPreferences;
import android.content.res.Configuration;
import android.media.MediaPlayer;
import android.os.Handler;
import android.os.IBinder;
import android.os.Message;
import android.util.Log;
import android.widget.Toast;

public class TipService extends Service{
	protected static final String TAG = "TipService";
	
	private final static int PLAY_AUDIO = 1;
	private final static int CANCEL_PLAY_AUDIO = 2;
	
	private int internal_time = -1;
	private boolean turn_on = false;
	
	private MediaPlayer mMediaPlayer;
	
	Handler mHandler = new Handler(){

		@SuppressLint("ShowToast")
		@Override
		public void handleMessage(Message msg) {
			switch(msg.what){
			case PLAY_AUDIO:
				Log.v(TAG, "PLAY_AUDIO");
				Toast makeText = Toast.makeText(TipService.this, 
						"休息一下，即便转转头也是有好处的", Toast.LENGTH_LONG);
				makeText.show();
				playAudio();
				mHandler.sendEmptyMessageDelayed(PLAY_AUDIO, internal_time);
				break;
				
			case CANCEL_PLAY_AUDIO:
				Log.v(TAG, "CANCEL_PLAY_AUDIO");
				mHandler.removeMessages(PLAY_AUDIO);
				break;

				default:
					Log.d(TAG, "not process");
			}
			super.handleMessage(msg);
		}
		
	};
	
	@Override
	public IBinder onBind(Intent intent) {
		// TODO Auto-generated method stub
		return null;
	}

	@Override
	public void onCreate() {
		// TODO Auto-generated method stub
		super.onCreate();
		mMediaPlayer = MediaPlayer.create(this, R.raw.yixiu);
		//TODO 如果是网络或者设备本身的音乐，可以用如下方法创建MediaPlayer
		/*mMediaPlayer = new MediaPlayer();
		try {
			mMediaPlayer.setDataSource("/data/data/xxx.mp3");
		} catch (IllegalArgumentException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		} catch (SecurityException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		} catch (IllegalStateException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		} catch (IOException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}*/
	}

	@Override
	public void onConfigurationChanged(Configuration newConfig) {
		// TODO Auto-generated method stub
		super.onConfigurationChanged(newConfig);
	}

	@Override
	public int onStartCommand(Intent intent, int flags, int startId) {
		SharedPreferences sharedata = getSharedPreferences(InternalTip.PREFS_NAME, 0);
		internal_time = sharedata.getInt("interanl_time", InternalTip.INVALID);
		turn_on  = sharedata.getBoolean("turn_on", false);
		if(internal_time == InternalTip.INVALID || !turn_on){
			mHandler.removeMessages(PLAY_AUDIO);
		}else{
			Log.v(TAG, "removeMessages & sendEmptyMessageDelayed");
			mHandler.removeMessages(PLAY_AUDIO);
			mHandler.sendEmptyMessageDelayed(PLAY_AUDIO, internal_time);
		}

		return super.onStartCommand(intent, flags, startId);
	}

	private synchronized void playAudio(){
		Date date = new Date();
		int currentHour = date.getHours();
		int currentMinute = date.getMinutes();
		if(currentHour < 9 || currentHour > 18 ||
				currentHour == 13 ||
				currentHour == 12 && currentMinute > 30) {
			return;
		}
		
		if(mMediaPlayer != null){
			mMediaPlayer.stop();
		}else{
			mMediaPlayer = MediaPlayer.create(this, R.raw.yixiu);
		}
		
		try {
			mMediaPlayer.prepare();
		} catch (IllegalStateException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		} catch (IOException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
		mMediaPlayer.start();
	}

	@Override
	public void onDestroy() {
		if(mMediaPlayer != null){
			try {
				mMediaPlayer.release();
			} catch (Exception e) {
				// TODO Auto-generated catch block
				e.printStackTrace();
			}
		}
		super.onDestroy();
	}

}

程序缺点：

1. 一旦播放没有停止的接口

2. 不能自定制音乐文件

3. 界面比较丑陋

后期改进，并计划用AlarmManager相关的类实现此功能