程序目的：点击button，在textview里显示返回的httpUri信息。
程序的问题是：经过调试发现BufferedStream读出来的response一直没有值，导致在TextView里不显示任何东西。配置文件也配置好了权限，想不明白是哪里出了问题，希望大神指点一下！！！
这是MainActivity的代码
package com.example.networktest;
import java.io.BufferedReader;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.net.HttpURLConnection;
import java.net.URL;
import android.app.Activity;
import android.os.Bundle;
import android.os.Handler;
import android.os.Message;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.TextView;
public class MainActivity extends Activity {
public static final int SHOW_RESPONSE = 0;
private Button sendRequest;
private TextView responseText;
private Handler handler = new Handler() {
public void handleMessage(Message msg) {
switch (msg.what) {
case SHOW_RESPONSE:
String response = (String) msg.obj;
responseText.setText(response);
}
}
};
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
sendRequest = (Button) findViewById(R.id.send_request1);
responseText = (TextView) findViewById(R.id.response_text1);
sendRequest.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
sendRequestWithHttpURLConnection();
}
});
}
private void sendRequestWithHttpURLConnection() {
new Thread(new Runnable() {
@Override
public void run() {
HttpURLConnection connection = null;
try {
URL url = new URL("http://www.baidu.com");
connection = (HttpURLConnection) url.openConnection();
connection.setRequestMethod("GET");
connection.setConnectTimeout(8000);
connection.setReadTimeout(8000);
InputStream in = connection.getInputStream();
BufferedReader reader = new BufferedReader(
new InputStreamReader(in));
StringBuilder resonse = new StringBuilder();
String line ;
while ((line = reader.readLine()) != null) {
resonse.append(line);
}
Message message = new Message();
message.what = SHOW_RESPONSE;
message.obj=resonse.toString();
handler.sendMessage(message);
} catch (Exception e) {
e.printStackTrace();
}finally {
if(connection!=null){
connection.disconnect();
}
}
}
}).start();
}
}
这是布局文件
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical" >
<Button
android:id="@+id/send_request1"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="Send Request" />
<ScrollView
android:layout_width="match_parent"
android:layout_height="match_parent" >
<TextView
android:id="@+id/response_text1"
android:layout_width="match_parent"
android:layout_height="wrap_content" />
</ScrollView>
</LinearLayout>
