edittext 监听内容变化

package com.it.hello.activity.fragment;

import java.util.ArrayList;
import java.util.List;

import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;
import org.xutils.x;
import org.xutils.common.Callback;
import org.xutils.http.RequestParams;

import com.it.hello.R;
import com.it.hello.activity.adapter.GetPhoneAdapter;

import android.graphics.Color;
import android.graphics.drawable.BitmapDrawable;
import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.text.Editable;
import android.text.SpannableString;
import android.text.Spanned;
import android.text.TextWatcher;
import android.text.style.ForegroundColorSpan;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.EditText;
import android.widget.LinearLayout.LayoutParams;
import android.widget.ListView;
import android.widget.PopupWindow;

/**
 * 主要实现了一些edit的功能
 * 
 * @author Administrator
 * 
 */
public class MOneFragment extends Fragment {
    private List<String> allList = new ArrayList<String>();
    private List<SpannableString> phoneList2 = new ArrayList<SpannableString>();
    public static EditText edt_Text;
    public static PopupWindow popupwindow;
    String usernameString, phoneString;
    //private boolean isFinished = true;
    //private int total = 0;
    //private int pageSize = 100;
    private GetPhoneAdapter adapter;
    //private int tatalPage = 1;
    private String urlPhone = "http://111.39.245.157:9527/cmppbs/getCmpp30PhoneList.action";

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container,
            Bundle savedInstanceState) {
        // TODO Auto-generated method stub
        return inflater.inflate(R.layout.monefragment, container, false);
    }

    @Override
    public void onActivityCreated(Bundle savedInstanceState) {
        // TODO Auto-generated method stub
        super.onActivityCreated(savedInstanceState);
        setView();
    }

    private void setView() {
        // TODO Auto-generated method stub
        edt_Text = (EditText) getActivity().findViewById(R.id.edt_number);
        setHttp();
        adapter = new GetPhoneAdapter(getActivity(), phoneList2);
        edt_Text.addTextChangedListener(new TextWatcher() {

            @Override
            public void onTextChanged(CharSequence s, int start, int before,
                    int count) {
                // TODO Auto-generated method stub
                if (s.length() > 0) {
                    View custstomView = getActivity().getLayoutInflater()
                            .inflate(R.layout.popview_item, null, false);
                    ListView listView = (ListView) custstomView
                            .findViewById(R.id.listView_select);
                    if (popupwindow == null) {
                        popupwindow = new PopupWindow(custstomView, edt_Text
                                .getWidth(), LayoutParams.WRAP_CONTENT, true);
                        
                    }
                    phoneList2.clear();
                    if (s.length() > 0) {
                        for (String str : allList) {
                            if (str.startsWith("" + s)) {
                                SpannableString ss = new SpannableString(str);
                                ss.setSpan(new ForegroundColorSpan(Color.RED),
                                        0, s.length(),
                                        Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
                                phoneList2.add(ss);
                            }
                        }
                    } else {
                        for (String str : allList) {
                            SpannableString ss = new SpannableString(str);
                            phoneList2.add(ss);
                        }
                    }
                    if (phoneList2.size() == 0) {
                        phoneList2.add(new SpannableString("没找到号码"));
                    }
                    adapter.notifyDataSetChanged();
                    listView.setAdapter(adapter);
                    popupwindow.setOutsideTouchable(true);
                    popupwindow.setFocusable(false);
                    popupwindow.setBackgroundDrawable(new BitmapDrawable());
                    popupwindow.showAsDropDown(edt_Text, 0, 0);
                }
            }

            @Override
            public void beforeTextChanged(CharSequence arg0, int arg1,
                    int arg2, int arg3) {
                // TODO Auto-generated method stub

            }

            @Override
            public void afterTextChanged(Editable arg0) {
                // TODO Auto-generated method stub

            }
        });
    }

    /**
     * 进行网络请求 获取得到电话的数据
     */
    private void setHttp() {
        // TODO Auto-generated method stub
        RequestParams params = new RequestParams(urlPhone);
        params.addBodyParameter("page", "" + 0);
        params.addBodyParameter("rows", "" + 100);
        x.http().get(params, new Callback.CommonCallback<String>() {

            @Override
            public void onCancelled(CancelledException arg0) {
                // TODO Auto-generated method stub

            }

            @Override
            public void onError(Throwable arg0, boolean arg1) {
                // TODO Auto-generated method stub

            }

            @Override
            public void onFinished() {
                // TODO Auto-generated method stub

            }

            @Override
            public void onSuccess(String arg0) {
                // TODO Auto-generated method stub
                Log.d("jiejie", arg0);
                if (arg0 != null) {
                    try {
                        JSONObject object = new JSONObject(arg0);
                        JSONArray array = object.getJSONArray("rows");
//                        total = object.getInt("total");
//                        tatalPage = (total + pageSize - 1) / pageSize;
                        for (int i = 0; i < array.length(); i++) {
                            usernameString = array.getJSONObject(i).getString(
                                    "userName");
                            phoneString = array.getJSONObject(i).getString(
                                    "terminalId");
                            allList.add(phoneString + " " + usernameString);
                        }
                    } catch (JSONException e) {
                        // TODO Auto-generated catch block
                        e.printStackTrace();
                    }
                    //isFinished = true;
                }
            }
        });
    }
}

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:focusable="true"
    android:focusableInTouchMode="true"
    android:orientation="vertical" >

    <EditText
        android:id="@+id/edt_number"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_margin="20dp"
        android:background="@drawable/textview_bg"
        android:hint="请填写号码"
        android:inputType="number"
        android:singleLine="true" />

</LinearLayout>