HttpClient

package com.pingyijinren.test;

import android.content.Intent;
import android.os.Handler;
import android.os.Message;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.TextView;

import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.client.HttpClient;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.impl.client.DefaultHttpClient;
import org.apache.http.util.EntityUtils;

import java.io.BufferedReader;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.net.HttpURLConnection;
import java.net.URL;

public class MainActivity extends AppCompatActivity{
private Button button;
private TextView textView;
private static final int SHOW_RESPONSE=0;
private Handler handler=new Handler(){
public void handleMessage(Message message){
switch(message.what){
case SHOW_RESPONSE:
String response=(String)message.obj;
textView.setText(response);
}
}
};
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);

button=(Button)findViewById(R.id.button);
textView=(TextView)findViewById(R.id.textView);

button.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
sendRequestWithHttpURLConnection();
}
});
}

private void sendRequestWithHttpURLConnection(){
new Thread(new Runnable(){
@Override
public void run(){
try{
HttpClient httpClient = new DefaultHttpClient();
HttpGet httpGet=new HttpGet("https://www.baidu.com");
HttpResponse httpResponse=httpClient.execute(httpGet);
if(httpResponse.getStatusLine().getStatusCode()==200){
HttpEntity httpEntity=httpResponse.getEntity();
String response= EntityUtils.toString(httpEntity,"utf-8");

Message message=new Message();
message.what=SHOW_RESPONSE;
message.obj=response;
handler.sendMessage(message);
}
}
catch(Exception e){
e.printStackTrace();
}

}
}).start();
}
}