如何从webView.PostUrl（）获取JSON？

Question

如何从webView.postURL（）获取json响应。如何在webview中直接发布数据时获得json响应。

 public class MainActivity extends Activity {

  private WebView webView;
  String postData = "name=xyz&pass=xyz123";

   @Override
  public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    this.webView = new WebView(this);
    setContentView(this.webView);
    webView.getSettings().setJavaScriptEnabled(true);
    webView.setWebViewClient(new WebViewClient(){
        @Override
        public boolean shouldOverrideUrlLoading(WebView view, String url){
            return false;
        }
    });

   webView.postUrl("http://10.0.2.2/login.php",EncodingUtils.getBytes(postData,"BASE64"));

}

serversidecode -

<?php
 print json_encode(
  array(
     'name' =>$_POST['name'],
      'pass'=>$_POST['pass']
       )
 ?>