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Android实现简易闹钟功能的方法


Android实现简易闹钟功能的方法

发布时间:2020-06-23 15:20:20 来源:高防服务器网 阅读:151 作者:清晨 栏目:移动开发

不懂Android实现简易闹钟功能的方法?其实想解决这个问题也不难,下面让小编带着大家一起学习怎么去解决,希望大家阅读完这篇文章后大所收获。

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。

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