Android实现简易闹钟功能的方法
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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:
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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