Android编程实现闹钟的方法详解

<?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>

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, 0, 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, intent, 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;  }}

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();      }    }  }}

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();  }}

<?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>