主线程上的网络异常，即使在新线程上也是如此

Question

即使我正在运行一个新线程，我也在主线程异常上获得此网络。知道这里出了什么问题吗？

public class MainActivity extends Activity {
@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);

    final EditText txturl=(EditText) findViewById(R.id.txtedit);
    Button btngo=(Button) findViewById(R.id.btngo);
    final WebView wv=(WebView) findViewById(R.id.webview);
    btngo.setOnClickListener(new OnClickListener() {
        @Override
        public void onClick(View v) {
            // TODO Auto-generated method stub
            Thread t=new Thread(new  Runnable() 
            {
                public void run() 
                {
                    try 
                    {
                        InputStream in=OpenHttpConnection("http://google.com");
                        byte [] buffer = new byte[10000];
                        in.read(buffer);
                        final String s=new String(buffer);
                        wv.post(new Runnable() {
                            @Override
                            public void run() {
                                // TODO Auto-generated method stub
                                wv.loadData(s, "text/html", "utf-8");
                            }
                        }) ;

                    } catch (IOException e) {
                        // TODO Auto-generated catch block
                        e.printStackTrace();
                    }
                }
            });
             t.run();
        }
    });

}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
    // Inflate the menu; this adds items to the action bar if it is present.
    getMenuInflater().inflate(R.menu.main, menu);
    return true;
}
private InputStream OpenHttpConnection (String urlString) throws IOException
{
    URL url=new URL(urlString);
    InputStream in=null;
    int response=-1;
    URLConnection uc=url.openConnection();
    if(!(uc instanceof HttpURLConnection))
        throw new IOException("Not an http connection");
    HttpURLConnection httpCon=(HttpURLConnection) uc;
    httpCon.connect();
    response=httpCon.getResponseCode();
    if(response==HttpURLConnection.HTTP_OK)
        in=httpCon.getInputStream();
    return in;

}
}

Answer 1

>run()在当前（主）线程上执行该方法，而不是在新线程上运行run方法的start()。

Answer 2

如前所述，运行线程在主线程上执行，根据新的 android API，在主线程上执行 IO 操作或网络操作将引发此错误。因此，您需要在异步任务中执行网络调用，并在执行后方法返回或更新 GUI。