Android实现简易闹钟功能

本文实例为大家分享了Android通过广播来实现闹钟的具体代码，供大家参考，具体内容如下

1.创建广播接收RepeatingAlarm.java

import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.util.Log;

public class RepeatingAlarm extends BroadcastReceiver{

  @Override
  public void onReceive(Context context, Intent intent) {
    if (intent.getAction()!=null&&intent.getAction().equals("com.gcc.alarm")) {//自定义的action
      intent = new Intent(context,AlarmActivity.class);
      intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
      context.startActivity(intent);
    }
  }
}

2.广播在Manifest.xml中配置：

<receiver
 android:name=".RepeatingAlarm"
  >
   <intent-filter >
      <action android:name="com.gcc.alarm"/>
     </intent-filter>
</receiver>

3.通过代码设置一个闹钟

Intent intent = new Intent(this, RepeatingAlarm.class);
intent.setAction("com.gcc.alarm");
PendingIntent sender = PendingIntent.getBroadcast(this, 0, intent, 0);
// Schedule the alarm!
AlarmManager am = (AlarmManager)getSystemService(ALARM_SERVICE);
          am.set(AlarmManager.RTC,
              c.getTimeInMillis(), sender);//c为设置闹钟的时间的Calendar对象

4.通过代码取消一个闹钟：

/**
 * 取消闹钟
 */
private void cancleAlarm(){
  Intent intent = new Intent(AlarmActivity.this,RepeatingAlarm.class);
  intent.setAction("com.gcc.alarm");
  PendingIntent sender = PendingIntent.getBroadcast(AlarmActivity.this, 0, intent, 0);
  // And cancel the alarm.
  AlarmManager am = (AlarmManager)getSystemService(ALARM_SERVICE);
   am.cancel(sender);//取消闹钟
  }

5.闹钟响是弹出的对化框并播放音乐用AlarmActivity.java类实现

import android.app.Activity;
import android.app.AlarmManager;
import android.app.AlertDialog;
import android.app.PendingIntent;
import android.content.Context;
import android.content.DialogInterface;
import android.content.Intent;
import android.content.res.AssetFileDescriptor;
import android.media.MediaPlayer;
import android.os.Bundle;

public class AlarmActivity extends Activity {

  MediaPlayer mp;

  @Override
  protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.aty_alarm);
    mp = new MediaPlayer();
    AssetFileDescriptor file = getResources().openRawResourceFd(R.raw.beep);
    try {
      mp.setDataSource(file.getFileDescriptor(), file.getStartOffset(),
          file.getLength());
      mp.prepare();
      file.close();
    } catch (IOException e) {
      e.printStackTrace();
    }
    mp.setVolume(0.5f, 0.5f);
    mp.setLooping(true);
    mp.start();
    alarmOialog();
  }

  @Override
  protected void onResume() {
    super.onResume();
  }

  @Override
  protected void onDestroy() {
    super.onDestroy();
    if (mp != null) {
      if (mp.isPlaying()) {
        mp.stop();
      }
      mp.release();
    }
  }

  public void alarmOialog() {
    AlertDialog.Builder builder = new AlertDialog.Builder(this);
    builder.setMessage("你有未处理的事件");
    builder.setPositiveButton("稍后提醒",
        new DialogInterface.OnClickListener() {

          @Override
          public void onClick(DialogInterface dialogInterface, int i) {
            alarm();
            finish();
          }
        });

    builder.setNegativeButton("停止", new DialogInterface.OnClickListener() {

      @Override
      public void onClick(DialogInterface dialogInterface, int i) {
        cancleAlarm();
        finish();// 关闭窗口
      }
    });
    builder.show().setCanceledOnTouchOutside(false);
    ;

  }

  /**
   * 取消闹钟
   */
  private void cancleAlarm() {
    // Create the same intent, and thus a matching IntentSender, for
    // the one that was scheduled.
    Intent intent = new Intent(AlarmActivity.this, RepeatingAlarm.class);
    intent.setAction("com.gcc.alarm");
    PendingIntent sender = PendingIntent.getBroadcast(AlarmActivity.this,
        0, intent, 0);

    // And cancel the alarm.
    AlarmManager am = (AlarmManager) getSystemService(ALARM_SERVICE);
    am.cancel(sender);
  }

  private void alarm() {
    // 获取系统的闹钟服务
    AlarmManager am = (AlarmManager) getSystemService(Context.ALARM_SERVICE);
    // 触发闹钟的时间（毫秒）
    long triggerTime = System.currentTimeMillis() + 10000;
    Intent intent = new Intent(this, RepeatingAlarm.class);
    intent.setAction("com.gcc.alarm");
    PendingIntent op = PendingIntent.getBroadcast(this, 0, intent, 0);
    // 启动一次只会执行一次的闹钟
    am.set(AlarmManager.RTC, triggerTime, op);
    // 指定时间重复执行闹钟
    // am.setRepeating(AlarmManager.RTC,triggerTime,2000,op);
  }

}

6.注：

1.aty_alarm.xml为空布局，不需添加任何组件
2.使用MediaPlayer播放res/raw目录下音频文件的方法如下：

mp = new MediaPlayer();
    AssetFileDescriptor file = getResources().openRawResourceFd(R.raw.beep);
    try {
      mp.setDataSource(file.getFileDescriptor(), file.getStartOffset(),
          file.getLength());

7.功能不是很完善，需要的可以修改使用，闹钟时间设定可通过上篇博文来获取Calendar对象。

以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持我们。