PhoneURLConnectGEt

package com.example.phonehttp;

import android.os.Bundle;
import android.os.Handler;
import android.app.Activity;
import android.widget.ScrollView;
import android.widget.TextView;

public class MainActivity extends Activity {

Handler handler = new Handler();
ScrollView scroll;
TextView tv;

@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);

scroll = (ScrollView) findViewById(R.id.scroll);
tv = (TextView) findViewById(R.id.tv);

String url = "https://home.cnblogs.com/news/";

HttpThread httpThread = new HttpThread(url, scroll, tv, handler);
httpThread.start();
}
}

package com.example.phonehttp;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.net.HttpURLConnection;
import java.net.MalformedURLException;
import java.net.URL;

import android.os.Handler;
import android.view.View;
import android.widget.ScrollView;
import android.widget.TextView;

public class HttpThread extends Thread {
String str;

String url;

ScrollView scroll;

TextView tv;

Handler handler;

public HttpThread(String url,ScrollView scroll,TextView tv,Handler handler) {
// TODO Auto-generated constructor stub
this.url = url;
this.scroll = scroll;
this.tv = tv;
this.handler = handler;
}

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

URL Httpurl = new URL(url);
HttpURLConnection conn = (HttpURLConnection) Httpurl
.openConnection();
conn.setConnectTimeout(5000);
conn.setRequestMethod("GET");
if (conn.getResponseCode() != 200) {
throw new RuntimeException("请求url失败");
}
BufferedReader bufferedReader = new BufferedReader(
new InputStreamReader(conn.getInputStream()));

StringBuffer sb = new StringBuffer();
while ((str = bufferedReader.readLine()) != null) {
sb.append(str);
}
str = sb.toString();
handler.post(new Runnable() {

@Override
public void run() {
// TODO Auto-generated method stub
scroll.setVisibility(View.VISIBLE);
tv.setText(str);
}
});
} catch (MalformedURLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}

<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:orientation="vertical"
tools:context=".MainActivity" >

<TextView
android:id="@+id/txtMenu"
android:layout_width="match_parent"
android:layout_height="48dp"
android:background="#E0FFFF"
android:clickable="true"
android:gravity="center"
android:text="@string/hello_world"
android:textSize="20sp" />

<ScrollView
android:id="@+id/scroll"
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="@string/hello_world" />
</ScrollView>

</LinearLayout>