关于提示对话框的一个小问题，那位大侠能帮忙看一下
写了一段代码出现了下面的错误提示：
构造函数 AlertDialog.Builder（new View.OnClickListener(){}）未定义
代码如下：
（红色标记的是出错行）
package com.cn.tablelayout;
import android.app.Activity;
import android.app.AlertDialog;
import android.app.AlertDialog.Builder;
import android.content.DialogInterface;
import android.os.Bundle;
import android.text.Editable;
import android.text.TextWatcher;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.EditText;
import android.widget.ImageButton;
import android.widget.TextView;
public class TablelayoutActivity extends Activity {
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
final TextView tv=(TextView)findViewById(R.id.text);
final EditText edittext1=(EditText)findViewById(R.id.edittext1);
final EditText edittext2=(EditText)findViewById(R.id.edittext2);
edittext2.addTextChangedListener(new TextWatcher(){
public void afterTextChanged(Editable arg0) {
}
public void beforeTextChanged(CharSequence s, int start, int count,
int after) {
}
public void onTextChanged(CharSequence s, int start, int before,
int count) {
if(s.length()==6){
tv.setText("请输入六位账号");
}
}
});
ImageButton button=(ImageButton)findViewById(R.id.button);
button.setOnClickListener(new OnClickListener(){
@Override
public void onClick(View v) {
if(edittext1.getText().length()==0||edittext2.getText().length()==0){
AlertDialog.Builder alert=new AlertDialog.Builder(this); alert.setTitle("提示");
alert.setMessage("请输入意见和账号");
alert.setPositiveButton("确定", newDialogInterface.OnClickListener(){
@Override
public void onClick(DialogInterface dialog, int which) {
}
});
alert.show();
}
}
});
}
}
[解决办法]
activity.this
