检测按钮点击事件和在Android Web视图中填写表格

Question

根据我的标题，我想在我的WebView中检测到一个按钮上的点击并自动填充用户名密码字段。这是我有：

@Override 
public void onPageFinished(final WebView view, String url) { 
    String user = "user"; 
    String pwd = "password"; 

    view.addJavascriptInterface(new Object() { 
     @JavascriptInterface 
     public void performClick() throws Exception { 
      Log.d("LOGIN::", "Clicked from on finished"); 
      Toast.makeText(getApplicationContext(), "Login clicked", Toast.LENGTH_LONG).show(); 

      String js = "javascript:document.getElementById('login')[0].value = '" + user+ "';document.getElementById('login')[1].value='" + pwd+ "';"; 
      view.evaluateJavascript(js, new ValueCallback<String>() { 
       @Override 
       public void onReceiveValue(String s) { 
        Log.d("form filled javascript", s); // Prints the string 'null' NOT Java null 
       } 
      }) 
     } 
    }, "fill"); 

我能够检测到按钮上的点击，但无法填写表格。

Answer 1

使用从JavaScript到JavaScript的JavaScript界面​​，check documentation。