Android实现简易闹钟功能
时间：2021-01-17 14:08:01|栏目：Android代码|点击： 次
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。
