Android中实现长按修改ListView对象的内容

import android.os.Bundle; 
import android.app.Activity; 
import android.app.AlertDialog; 
import android.graphics.Color; 
import android.view.LayoutInflater; 
import android.view.View; 
import android.view.View.OnClickListener; 
import android.widget.AdapterView; 
import android.widget.AdapterView.OnItemLongClickListener; 
import android.widget.ArrayAdapter; 
import android.widget.Button; 
import android.widget.EditText; 
import android.widget.ListView; 
import android.widget.TextView; 
 
public class MainActivity extends Activity { 
private ListView lvShow; 
private AlertDialog dialog; 
 
@Override 
protected void onCreate(Bundle savedInstanceState) { 
super.onCreate(savedInstanceState); 
setContentView(R.layout.activity_main); 
lvShow = (ListView) findViewById(R.id.lvShow); 
String[] arr = { "李四", "小猪", "店小二" }; 
ArrayAdapter<String> Adap1 = new ArrayAdapter<String>(this, 
R.layout.test_list, arr); 
lvShow.setAdapter(Adap1);// 设置ListView的显示 
lvShow.setOnItemLongClickListener(new OnItemLongClickListener() { 
 
@Override 
public boolean onItemLongClick(AdapterView<?> parent, View view, 
int position, long id) { 
setAlertDialog(view); 
dialog.show(); 
return false; 
} 
}); 
} 
 
private void setAlertDialog(final View view) { 
LayoutInflater factory = LayoutInflater.from(getApplicationContext()); 
// 引入一个外部布局 
View contview = factory.inflate(R.layout.test_dialog, null); 
contview.setBackgroundColor(Color.BLACK);// 设置该外部布局的背景 
final EditText edit = (EditText) contview 
.findViewById(R.id.edit_dialog);// 找到该外部布局对应的EditText控件 
Button btOK = (Button) contview.findViewById(R.id.btOK_dialog); 
btOK.setOnClickListener(new OnClickListener() {// 设置按钮的点击事件 
 
@Override 
public void onClick(View v) { 
((TextView) view).setText(edit.getText().toString()); 
dialog.dismiss(); 
} 
}); 
dialog = new AlertDialog.Builder(MainActivity.this).setView(contview) 
.create(); 
} 
} 

<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" 
 android:paddingBottom="@dimen/activity_vertical_margin" 
 android:paddingLeft="@dimen/activity_horizontal_margin" 
 android:paddingRight="@dimen/activity_horizontal_margin" 
 android:paddingTop="@dimen/activity_vertical_margin" 
 tools:context=".MainActivity" > 
 
 <ListView 
  android:id="@+id/lvShow" 
  android:layout_width="match_parent" 
  android:layout_height="wrap_content" /> 

<?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:gravity="center_horizontal" 
 android:orientation="vertical" > 
 
 <EditText 
  android:id="@+id/edit_dialog" 
  android:layout_width="match_parent" 
  android:layout_height="wrap_content" 
  android:textSize="28sp" /> 
 
 <Button 
  android:id="@+id/btOK_dialog" 
  android:layout_width="wrap_content" 
  android:layout_height="wrap_content" 
  android:text="确定" /> 
 
</LinearLayout>