当我运行项目时，我收到错误是致命的异常：主要在logcat中

这是我的Contact.java



包com.example.helloworld;

import android.app.Activity;

导入android.os.AsyncTask;

导入android.os.Bundle;

导入android.util.Log;

import android.view.View;

import android.widget.EditText;



公共类联系人扩展活动{

EditText textName;

EditText textSubject;

EditText textMessage;

public void onCreate（Bundle savedInstanceState）{

super.onCreate（savedInstanceState）;

setContentView（R.layout.contact）;

}

public void List（View v）{

super.onBackPressed（）;

}



public void SendMail（View v）{



最终GMailSender发送者=新GMailSender（nani22791@gmail.com，xxxxx）;

新AsyncTask< void，>（） {

@Override public Void doInBackgrou nd（Void ... arg）{

尝试{

sender.sendMail（hi，message，murugan，murugan.siva87@gmail。 COM）;

} catch（异常e）{

Log.e（SendMail，e.getMessage（），e）;

}

返回null;

}

} .execute（）;



}

}

This is my Contact.java

package com.example.helloworld;
import android.app.Activity;
import android.os.AsyncTask;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.widget.EditText;

public class Contact extends Activity {
EditText textName;
EditText textSubject;
EditText textMessage;
public void onCreate(Bundle savedInstanceState){
super.onCreate(savedInstanceState);
setContentView(R.layout.contact);
}
public void List(View v){
super.onBackPressed();
}

public void SendMail(View v) {

final GMailSender sender = new GMailSender("nani22791@gmail.com", "xxxxx");
new AsyncTask<void,>() {
@Override public Void doInBackground(Void... arg) {
try {
sender.sendMail("hi","message","murugan","murugan.siva87@gmail.com");
} catch (Exception e) {
Log.e("SendMail", e.getMessage(), e);
}
return null;
}
}.execute();

}
}