我刚开始使用 android 和 ant 给我以下错误:
-compile: java:44: cannot find symbol
[javac] symbol : method getSystemService(java.lang.String)
[javac] AudioManager am = (AudioManager)this.getSystemService(Context.AUDIO_SERVICE);
^
我不明白这个问题,因为我正在导入android.media.AudioManager;
我的代码如下:
package com.example.findme;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.os.Bundle;
import android.telephony.SmsMessage;
import android.widget.Toast;
import android.media.AudioManager;
public class SMSReceiver extends BroadcastReceiver
{
public final static String EXTRA_MESSAGE = "com.example.RemoVol.MESSAGE";
public final static String SILENT_MESSAGE = "Your phone has been silenced";
public final static String VOLUME_MESSAGE = "Your phone volume is normal";
@Override
public void onReceive(Context context, Intent intent)
{
//---get the SMS message passed in---
Bundle bundle = intent.getExtras();
SmsMessage msgs[] = null;
String str ="";
String testString="";
if (bundle != null)
{
//---retrieve the SMS message received---
Object pdus[]=(Object[]) bundle.get("pdus");
msgs = new SmsMessage[pdus.length];
for (int i=0; i<msgs.length; i++)
{
msgs[i] = SmsMessage.createFromPdu((byte[])pdus[i]);
str += "SMS from" + msgs[i].getOriginatingAddress();
str += " :";
str +=msgs[i].getMessageBody().toString();
testString=msgs[i].getMessageBody().toString();
str += "\n";
}
//---display the new SMS message---
Toast.makeText(context, str, Toast.LENGTH_SHORT).show();
if(testString.equals("#silent"))
{
intent.putExtra(EXTRA_MESSAGE, SILENT_MESSAGE);
AudioManager am = (AudioManager) this.getSystemService(Context.AUDIO_SERVICE);
am.setRingerMode(AudioManager.RINGER_MODE_SILENT);
}
else if(testString.equals("#volume"))
{
AudioManager am = (AudioManager) this.getSystemService(Context.AUDIO_SERVICE);
am.setRingerMode(AudioManager.RINGER_MODE_NORMAL);
intent.putExtra(EXTRA_MESSAGE, VOLUME_MESSAGE);
}
}
}
}
我在我的 android 项目的根目录中使用命令“ant debug”进行编译。
我希望这不是真的愚蠢和明显的事情。如果我浪费了您的时间,请提前道歉。
感谢您对此进行审查。