Android编程实现闹钟的方法详解

概述本文实例讲述了Android编程实现闹钟的方法。分享给大家供大家参考，具体如下：

本文实例讲述了AndroID编程实现闹钟的方法。分享给大家供大家参考，具体如下：

在AndroID中，有一个闹钟的类，AlarmManager类，我们可以通过其来对系统内的通知进行 *** 作！

本文用到了Service和broadcast两个后台管理，在处理时，曾出现过很多问题，但经过半天的努力，终于解决了！

首先是Main.xml文件：

<?xml version="1.0" enCoding="utf-8"?><linearLayout xmlns:androID="http://schemas.androID.com/apk/res/androID"  androID:orIEntation="vertical"  androID:layout_wIDth="fill_parent"  androID:layout_height="fill_parent"  ><TextVIEw  androID:ID="@+ID/mText"  androID:layout_wIDth="fill_parent"  androID:layout_height="wrap_content"  androID:text="@string/hello"  />  <button  androID:ID="@+ID/setTimebutton"  androID:layout_wIDth="wrap_content"  androID:layout_height="wrap_content"  androID:text="@string/setTimebutton"  />  <button  androID:ID="@+ID/cancelbutton"  androID:layout_wIDth="wrap_content"  androID:layout_height="wrap_content"  androID:text="@string/cancelbutton"  /></linearLayout>

MainActivity.Java:

package com.chIEfcto.Alarm;import java.text.Format;import java.util.Calendar;import androID.app.Activity;import androID.app.AlarmManager;import androID.app.PendingIntent;import androID.app.TimePickerDialog;import androID.content.Intent;import androID.os.Bundle;import androID.vIEw.VIEw;import androID.vIEw.VIEw.OnClickListener;import androID.Widget.button;import androID.Widget.TextVIEw;import androID.Widget.TimePicker;public class MainActivity extends Activity {  //PropertIEs  private button msetbutton;  private button mcancelbutton;  private AlermReceiver uIReceiver;  private TextVIEw mTextVIEw;  //就用了Java的日历  private Calendar calendar;  /** Called when the activity is first created. */  @OverrIDe  public voID onCreate(Bundle savedInstanceState) {    super.onCreate(savedInstanceState);    setContentVIEw(R.layout.main);    calendar = Calendar.getInstance();    mTextVIEw = (TextVIEw)this.findVIEwByID(R.ID.mText);    msetbutton = (button)this.findVIEwByID(R.ID.setTimebutton);    mcancelbutton = (button)findVIEwByID(R.ID.cancelbutton);    msetbutton.setonClickListener(new OnClickListener() {      @OverrIDe      public voID onClick(VIEw v) {        // Todo auto-generated method stub        calendar.setTimeInMillis(System.currentTimeMillis());        int hour = calendar.get(Calendar.HOUR_OF_DAY);        int minute = calendar.get(Calendar.MINUTE);        new TimePickerDialog(MainActivity.this,new TimePickerDialog.OnTimeSetListener() {          @OverrIDe          public voID onTimeSet(TimePicker vIEw,int hourOfDay,int minute) {            calendar.setTimeInMillis(System.currentTimeMillis());            //set(f,value) changes fIEld f to value.            calendar.set(Calendar.HOUR_OF_DAY,hourOfDay);            calendar.set(Calendar.MINUTE,minute);            calendar.set(Calendar.SECOND,0);            calendar.set(Calendar.MILliSECOND,0);            Intent intent = new Intent(MainActivity.this,AlermReceiver.class);            intent.putExtra("music",true);            PendingIntent pendingIntent = PendingIntent.getbroadcast(MainActivity.this,intent,0);            AlarmManager am;            //获取系统进程            am = (AlarmManager)getSystemService(ALARM_SERVICE);            am.set(AlarmManager.RTC_WAKEUP,calendar.getTimeInMillis(),pendingIntent);            //设置周期！！            am.setRepeating(AlarmManager.RTC_WAKEUP,System.currentTimeMillis()+(10*1000),(24*60*60*1000),pendingIntent);            String tmps = "设置闹钟时间为："+format(hourOfDay)+":"+format(minute);            mTextVIEw.setText(tmps);          }        },hour,minute,true).show();      }    });    mcancelbutton.setonClickListener(new OnClickListener() {      @OverrIDe      public voID onClick(VIEw v) {        Intent intent = new Intent(MainActivity.this,AlermReceiver.class);        intent.putExtra("music",true);        PendingIntent pendingIntent = PendingIntent.getbroadcast(MainActivity.this,0);        AlarmManager am;        //获取系统进程        am = (AlarmManager)getSystemService(ALARM_SERVICE);        //cancel        am.cancel(pendingIntent);        mTextVIEw.setText("取消了！");      }    });  }  private String format(int x) {    String s = ""+x;    if(s.length() == 1)      s = "0"+s;    return s;  }}

AlarmService.java

package com.chIEfcto.Alarm;import java.io.IOException;import androID.app.Service;import androID.content.Context;import androID.content.Intent;import androID.media.AudioManager;import androID.media.MediaPlayer;import androID.media.ringtoneManager;import androID.net.Uri;import androID.os.Binder;import androID.os.Bundle;import androID.os.IBinder;public class AlarmService extends Service {  // MediaPlayer实例  private MediaPlayer player;  // IBinder实例  @OverrIDe  public IBinder onBind(Intent intent) {    playMusic();    return null;  }  @OverrIDe  public voID onCreate() {    // Todo auto-generated method stub    super.onCreate();    playMusic();  }  @OverrIDe  public voID onDestroy() {    // Todo auto-generated method stub    super.onDestroy();    if (player != null) {      player.stop();      player.release();    }  }  @OverrIDe  public voID onStart(Intent intent,int startID) {    // Todo auto-generated method stub    super.onStart(intent,startID);     if (intent != null) {        Bundle bundle = intent.getExtras();        if (bundle != null) {          if(bundle.getBoolean("music"))            playMusic();          else            stopMusic();        }      }  }  public voID playMusic() {    if(player == null) {      Uri uri = ringtoneManager.getDefaultUri(ringtoneManager.TYPE_ALARM);      try {        player = new MediaPlayer();        player.setDataSource(this,uri);        final AudioManager audioManager = (AudioManager)this            .getSystemService(Context.AUdio_SERVICE);        if (audioManager.getStreamVolume(AudioManager.STREAM_ALARM) != 0) {          player.setAudioStreamType(AudioManager.STREAM_ALARM);          player.setLooPing(true);          player.prepare();        }      } catch (IllegalStateException e) {        e.printstacktrace();      } catch (IOException e) {        e.printstacktrace();      }    }    if(!player.isPlaying()) {      player.start();    }  }  public voID stopMusic() {    if (player != null) {      player.stop();      try {        // 在调用stop后如果需要再次通过start进行播放,需要之前调用prepare函数        player.prepare();      } catch (IOException ex) {        ex.printstacktrace();      }    }  }}

下面就是本文的关键性代码，了解Activity到broadcast的机制，这小应用就很好实现了~

AlermReceiver.java

package com.chIEfcto.Alarm;import java.io.IOException;import java.util.Calendar;import androID.content.broadcastReceiver;import androID.content.Context;import androID.content.Intent;import androID.media.AudioManager;import androID.media.MediaPlayer;import androID.media.ringtoneManager;import androID.net.Uri;import androID.os.Bundle;import androID.util.Log;import androID.Widget.Toast;public class AlermReceiver extends broadcastReceiver {  private MediaPlayer mMediaPlayer;  Context context;  @OverrIDe  public voID onReceive(Context context,Intent intent) {    // Todo auto-generated method stub    Calendar calendar = Calendar.getInstance();    calendar.setTimeInMillis(System.currentTimeMillis());    int minute = calendar.get(Calendar.MINUTE);    CharSequence text = String.valueOf(minute);    Toast.makeText(context,text,Toast.LENGTH_LONG).show();    this.context = context;    Bundle bundle = intent.getExtras();    Intent serviceIntent = new Intent("chIEf_musicService");    serviceIntent.putExtras(bundle);    if(bundle != null) {      Log.i("CTO",String.valueOf(bundle.getBoolean("music")));      if(bundle.getBoolean("music"))        context.startService(serviceIntent);      else        context.stopService(serviceIntent);    }    //在这里是播放不了的！！    //playAlarmRing();  }  private voID playAlarmRing() {    Uri uri = ringtoneManager.getDefaultUri(ringtoneManager.TYPE_ALARM);    try {      mMediaPlayer = new MediaPlayer();      mMediaPlayer.setDataSource(context,uri);      final AudioManager audioManager = (AudioManager) context          .getSystemService(Context.AUdio_SERVICE);      if (audioManager.getStreamVolume(AudioManager.STREAM_ALARM) != 0) {        mMediaPlayer.setAudioStreamType(AudioManager.STREAM_ALARM);        mMediaPlayer.setLooPing(true);        mMediaPlayer.prepare();      }    } catch (IllegalStateException e) {      e.printstacktrace();    } catch (IOException e) {      e.printstacktrace();    }    mMediaPlayer.start();  }  private voID StopAlarmRing() {    mMediaPlayer.stop();  }}

要注意的是Mainifest.xml：

<?xml version="1.0" enCoding="utf-8"?><manifest xmlns:androID="http://schemas.androID.com/apk/res/androID"   package="com.chIEfcto.Alarm"   androID:versionCode="1"   androID:versionname="1.0">  <uses-sdk androID:minSdkVersion="7" />  <application androID:icon="@drawable/icon" androID:label="@string/app_name">    <activity androID:name=".MainActivity"         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=".AlarmService">      <intent-filter>        <action androID:name="chIEf_musicService"/>        <category androID:name="androID.intent.category.DEFAulT"/>      </intent-filter>    </service>    <receiver androID:name=".AlermReceiver" androID:process=":remote"/>  </application>  <uses-permission androID:name="androID.permission.MOUT_UNMOUNT_fileSYstemS"/></manifest>

注：在模拟器中是运行不了的~

PS：关于AndroIDManifest.xml文件相关属性功能可参考本站在线工具：

AndroID Manifest功能与权限描述大全：
http://tools.jb51.net/table/AndroidManifest

更多关于AndroID相关内容感兴趣的读者可查看本站专题：《Android开发入门与进阶教程》、《Android调试技巧与常见问题解决方法汇总》、《Android基本组件用法总结》、《Android视图View技巧总结》、《Android布局layout技巧总结》及《Android控件用法总结》

希望本文所述对大家AndroID程序设计有所帮助。

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