将listview显示在dialog当中

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout 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"
    android:orientation="vertical"
    tools:context="com.webjet.listviewondialog.MainActivity">
    <TextView
        android:id="@+id/tv_name"
        android:layout_width="match_parent"
        android:layout_height="50dp"
        android:text=""
        android:gravity="center"
        />
    <Button
        android:layout_width="match_parent"
        android:layout_height="50dp"
        android:layout_marginTop="30dp"
        android:background="#00ff00"
        android:text="点击显示对话框"
        android:onClick="go"
        />
</LinearLayout>

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:id="@+id/ll"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:paddingLeft="20dp"
    android:paddingRight="20dp"
    android:orientation="vertical"
    >

    <ListView
        android:id="@+id/lv"
        android:layout_width="match_parent"
        android:layout_height="match_parent">
    </ListView>
</LinearLayout>

<?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">
    <TextView
        android:id="@+id/tv"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text=""
        android:textSize="20dp"
        />
</LinearLayout>

import android.app.AlertDialog;
import android.content.Context;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.AdapterView;
import android.widget.ArrayAdapter;
import android.widget.ListView;
import android.widget.TextView;

public class MainActivity extends AppCompatActivity {
    ArrayAdapter adapter ;
    AlertDialog.Builder builder;
    AlertDialog alertDialog;
    TextView tv_name;//main中的 tv用来接受所选择的的值
    TextView tv;//listview中的tv
    String[] data = new String[20];//数据源

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        //初始化
        for(int i=0; i<20; i++){
            data[i] = "小猪"+i;
        }
        tv = (TextView) findViewById(R.id.tv);
        tv_name = (TextView) findViewById(R.id.tv_name);


    }
    public void go(View v){

        builder = new AlertDialog.Builder(this);
        LayoutInflater inflater=(LayoutInflater)getSystemService(Context.LAYOUT_INFLATER_SERVICE);
        View viewRelatedType = inflater.inflate(R.layout.listview,(ViewGroup)findViewById(R.id.ll));
        ListView listView = (ListView) viewRelatedType.findViewById(R.id.lv);
        listView.setAdapter(new ArrayAdapter<String>(this,R.layout.list_item,R.id.tv,data));
        builder.setView(viewRelatedType);
        alertDialog = builder.show();
        listView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
            @Override
            public void onItemClick(AdapterView<?> adapterView, View view, int i, long l) {
                tv_name.setText(data[i]);
                alertDialog.dismiss();
            }
        });
    }
}