我需要在指定的时间间隔后启动报警，但报警在开始时执行，并在一定的时间间隔后重复

Question

  

我已将我的代码附在此处以供参考。   我需要在一定时间间隔后执行警报，但是它从开始时开始并重复。我可以为此获得解决方案。

     

AlarmManagerExample.java

   package com.example.alarmmanagerexample;

import android.os.Bundle;
import android.os.SystemClock;
import android.app.Activity;
import android.app.AlarmManager;
import android.app.PendingIntent;
import android.content.Intent;

public class AlarmManagerExample extends Activity {


    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_alarm_manager_example);


        try {

            //Create a new PendingIntent and add it to the AlarmManager
            Intent intent = new Intent(this, RingAlarm.class);
            PendingIntent pendingIntent = PendingIntent.getActivity(this,
                12345, intent, PendingIntent.FLAG_CANCEL_CURRENT);
            AlarmManager am =
                (AlarmManager)getSystemService(Activity.ALARM_SERVICE);
            am.setRepeating(AlarmManager.ELAPSED_REALTIME,     SystemClock.elapsedRealtime(),
                    2*60*60,pendingIntent);

          } catch (Exception e) {}
    }
}

  

activity_alarm_manager_example.xml

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context=".AlarmManagerExample" >

    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_centerHorizontal="true"
        android:layout_centerVertical="true"
        android:text="@string/hello_world" />

</RelativeLayout>

  

RingAlarm.java

package com.example.alarmmanagerexample;

    import android.app.Activity;
    import android.content.Context;
    import android.media.MediaPlayer;
    import android.media.RingtoneManager;
    import android.net.Uri;
    import android.os.Bundle;
    import android.util.Log;
    import android.view.MotionEvent;
    import android.view.View;
    import android.view.View.OnTouchListener;
    import android.view.Window;
    import android.view.WindowManager;
    import android.widget.Button;

    public class RingAlarm extends Activity {

           MediaPlayer mp=null ;

            @Override
            protected void onCreate(Bundle savedInstanceState) {

                        super.onCreate(savedInstanceState);
                        this.requestWindowFeature(Window.FEATURE_NO_TITLE);
                        this.getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN,
                                WindowManager.LayoutParams.FLAG_FULLSCREEN);

                        setContentView(R.layout.alarm);
                        Button stopAlarm = (Button) findViewById(R.id.stopAlarm);

                        mp = MediaPlayer.create(getBaseContext(),R.raw.audio);


                        stopAlarm.setOnTouchListener(new OnTouchListener() {

                            @Override
                            public boolean onTouch(View arg0, MotionEvent arg1) {
                                // TODO Auto-generated method stub
                                mp.stop();
                                finish();
                                return false;
                            }
                        });

                        playSound(this, getAlarmUri());
                    }

                    private void playSound(final Context context, Uri alert) {


                        Thread background = new Thread(new Runnable() {
                            public void run() {
                                try {

                                   mp.start();

                                } catch (Throwable t) {
                                    Log.i("Animation", "Thread  exception "+t);
                                }   
                            }
                     });
                     background.start();
                   }

                    @Override
                    protected void onDestroy() {
                        super.onDestroy();
                        mp.stop();
                    }               //Get an alarm sound. Try for an alarm. If none set, try notification,
                        //Otherwise, ringtone.
                    private Uri getAlarmUri() {

                        Uri alert = RingtoneManager
                                .getDefaultUri(RingtoneManager.TYPE_ALARM);
                        if (alert == null) {
                            alert = RingtoneManager
                                    .getDefaultUri(RingtoneManager.TYPE_NOTIFICATION);
                            if (alert == null) {
                                alert = RingtoneManager
                                        .getDefaultUri(RingtoneManager.TYPE_RINGTONE);
                            }
                        }
                        return alert;
                    }

    }

  

Alarm.xml

<?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">
    <Button android:text="Stop Alarm" android:id="@+id/stopAlarm"
        android:layout_width="wrap_content" android:layout_height="wrap_content" />
</LinearLayout>

  

的AndroidManifest.xml

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.example.alarmmanagerexample"
    android:versionCode="1"
    android:versionName="1.0" >

    <uses-sdk
        android:minSdkVersion="8"
        android:targetSdkVersion="17" />

    <application
        android:allowBackup="true"
        android:icon="@drawable/ic_launcher"
        android:label="@string/app_name"
        android:theme="@style/AppTheme" >
        <activity
            android:name="com.example.alarmmanagerexample.AlarmManagerExample"
            android:label="@string/app_name" >
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
        <activity
            android:name=".RingAlarm"
            android:label="@string/app_name" />
    </application>

</manifest>