这样用HttpURLConnection哪里出错了？

Question

网络编程图片socketbitmapandroid

Answer 1

<uses-permission android:name="android.permission.INTERNET"/>

Answer 2

android4.0后，这种代码不能写在主线程里面， 可以放在自定义的线程里面，  或者在setContentView下面加上if (android.os.Build.VERSION.SDK_INT > 9) {
    StrictMode.ThreadPolicy policy = new StrictMode.ThreadPolicy.Builder().permitAll().build();
    StrictMode.setThreadPolicy(policy);
}
这个试试，不过这样写不好， 最好还是放在自己定义一个thread里面

Answer 3

new Thread(){
public void run(){
try{
URL url=new URL("http://www.bing.com/");
HttpURLConnection connection=(HttpURLConnection)url.openConnection();
connection.setDoInput(true);
connection.setDoOutput(true);
connection.setRequestMethod("POST");
connection.setUseCaches(false);
connection.connect();
DataOutputStream dos=new DataOutputStream(connection.getOutputStream());
String params=URLEncoder.encode("name=123456","gb2312");
dos.write(params.getBytes());
dos.flush();
dos.close();
InputStreamReader isr=new InputStreamReader(connection.getInputStream());
BufferedReader br=new BufferedReader(isr);
String tempResult=null;
String result=null;
while((tempResult=br.readLine())!=null){
result+=tempResult+"\n";
}
Message msg1 = new Message();
                        msg1.what = 100;
                        msg1.obj = result;
                        handler1.sendMessage(msg1);
br.close();
isr.close();
}catch(IOException e){
e.printStackTrace();
}
}
}.start();
}
});
    } 
private Handler handler1=new Handler(){
public void handleMessage(Message msg1){
switch (msg1.what){
case 100:
text.setText(msg1.obj.toString());
break;
}
};
};
android4.0 以后不允许主线程直接访问网络 需要new thread  这是我前几天测试的 希望对你有用