[มือใหม่][แก้ไขได้แล้วครับ]สอบถามเรื่อง HttpGet รันแล้วไม่แสดงค่าออกทาง TextView และพอรันใหม่โปรแกรมปิดการทำงาน

package com.example.prasitz.testmysql;

import android.os.StrictMode;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.widget.Button;
import android.widget.TextView;
import android.widget.Toast;

import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.StatusLine;
import org.apache.http.client.ClientProtocolException;
import org.apache.http.client.HttpClient;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.impl.client.DefaultHttpClient;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;

public class MainActivity extends AppCompatActivity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        final TextView result = (TextView)findViewById(R.id.txt1);
        Button btn1 = (Button)findViewById(R.id.button);
        btn1.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                String url = "http://10.0.2.2/android/getHttpGet.php";
                String result1 = getHttpGet(url);
                result.setText(result1);

            }
        });
    }
    public String getHttpGet(String url){
        StringBuilder str = new StringBuilder();
        HttpClient httpClient = new DefaultHttpClient();
        HttpGet httpGet = new HttpGet(url);
        try {
            HttpResponse response = httpClient.execute(httpGet);
            StatusLine statusLine = response.getStatusLine();
            int statusCode = statusLine.getStatusCode();
            if(statusCode == 200){
                HttpEntity entity = response.getEntity();
                InputStream content = entity.getContent();
                BufferedReader reader = new BufferedReader(new InputStreamReader(content));
                String line;
                while ((line = reader.readLine()) != null){
                    str.append(line);
                }
            }else {
                Log.e("Log","Fail Download...");
            }

        }catch (ClientProtocolException e){
            e.printStackTrace();
        }catch (IOException e){
            e.printStackTrace();
        }
        return str.toString();
    }

}

<TableLayout 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"
    tools:context="com.example.prasitz.testmysql.MainActivity">

    <!-- TODO: Update blank fragment layout -->

    <TableRow
        android:layout_width="match_parent"
        android:layout_height="match_parent">

    </TableRow>

    <TableLayout
        android:layout_width="match_parent"
        android:layout_height="match_parent">

        <Button
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="Get"
            android:id="@+id/button" />

        <TableRow
            android:layout_width="match_parent"
            android:layout_height="match_parent">

            <TextView
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:text="Result"
                android:id="@+id/txt1"
                android:layout_column="11" />
        </TableRow>
    </TableLayout>
</TableLayout>