的WebView的HTML中按一下按钮检测活动（JAVA的code）按钮、HTML、WebView、JAVA

2023-09-12 07:54:58 作者：卟是真爱硪丶请让开

我是想检测的WebView的HTML按钮，点击进入java的code（活性）。我提到的另一个SO Detect通过JavaScript在Android中的WebView点击HTML按钮

I was trying to detect the html button click of webview into java code(In activity) . I referred another SO Detect click on HTML button through javascript in Android WebView

而不是working.My code：

but is not working.My code:

index.html的

<html>  <head>  <script language="javascript">  function js1() {
    document.loginform.method="post";  document.loginform.action = "https://example.com/chechlogin.asp";
           }
     </script>  </head>  <body>    <form name="loginform">
     <input type="text" name="empcode" value="58686" /><br/>
     <input type="password" name="emppassNTL" />
     <input type="submit" name="submit" id="submit_id" onclick="login.performClick();" />    </form>  </body>  </html>

MainActivity.java

package com.example.webview;

import android.os.Bundle;
import android.annotation.SuppressLint;
import android.app.Activity;
import android.util.Log;
import android.view.Menu;
import android.view.View;
import android.view.Window;
import android.webkit.JavascriptInterface;
import android.webkit.WebSettings;
import android.webkit.WebView;
import android.webkit.WebViewClient;
import android.widget.EditText;
import android.widget.TextView;
import android.widget.Toast;

@SuppressLint("SetJavaScriptEnabled")
public class MainActivity extends Activity {

   private EditText field;
   private WebView browser;

   @Override        
   protected void onCreate(Bundle savedInstanceState) {
      super.onCreate(savedInstanceState);
      setContentView(R.layout.activity_main);
      field = (EditText)findViewById(R.id.urlField);
      browser = (WebView)findViewById(R.id.webView1);
      browser.getSettings().setJavaScriptEnabled(true);
      browser.setWebViewClient(new MyBrowser());
      browser.loadUrl("file:///android_asset/index.html");
   }


   @SuppressLint("JavascriptInterface")
   public void open(View view){
      String url = field.getText().toString();
      browser.getSettings().setLoadsImagesAutomatically(true);
      browser.getSettings().setJavaScriptEnabled(true);
      browser.setScrollBarStyle(View.SCROLLBARS_INSIDE_OVERLAY);
      browser.loadUrl(url);
      browser.addJavascriptInterface(new Object()
      {
          @JavascriptInterface
        public void performClick()
        {
            Log.d("LOGIN::", "Clicked");
             Toast.makeText(MainActivity.this, "Login clicked", Toast.LENGTH_LONG).show();
        }
      }, "login");

   }
   private class MyBrowser extends WebViewClient {
      @Override
      public boolean shouldOverrideUrlLoading(WebView view, String url) {
         view.loadUrl(url);
         return true;
      }
   }

   @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;
   }

}

但是performClick（）方法是不被调用。请更正错误。

But the performClick() method is not being called. Please correct the error.

推荐答案

哎呀！ performClick（）方法是在错误的地方。 MainActivity.java应该是这样的：

Ooops!!! performClick() method was at wrong place. MainActivity.java should be something like this :

package com.example.webview;

import android.os.Bundle;
import android.annotation.SuppressLint;
import android.app.Activity;
import android.util.Log;
import android.view.Menu;
import android.view.View;
import android.view.Window;
import android.webkit.JavascriptInterface;
import android.webkit.WebSettings;
import android.webkit.WebView;
import android.webkit.WebViewClient;
import android.widget.EditText;
import android.widget.TextView;
import android.widget.Toast;

@SuppressLint("SetJavaScriptEnabled")
public class MainActivity extends Activity {

   private WebView browser;

   @Override        
   protected void onCreate(Bundle savedInstanceState) {
      super.onCreate(savedInstanceState);
      setContentView(R.layout.activity_main);
      browser = (WebView)findViewById(R.id.webView1);
      browser.getSettings().setJavaScriptEnabled(true);
      browser.getSettings().setLoadsImagesAutomatically(true);
      browser.setScrollBarStyle(View.SCROLLBARS_INSIDE_OVERLAY);
      browser.setWebViewClient(new MyBrowser());
      browser.loadUrl("file:///android_asset/index.html");
   }


   private class MyBrowser extends WebViewClient {
      @Override
      public boolean shouldOverrideUrlLoading(WebView view, String url) {
          view.loadUrl(url); 
          view.addJavascriptInterface(new Object()
          {
              @JavascriptInterface
            public void performClick() throws Exception
            {
                Log.d("LOGIN::", "Clicked");
                 Toast.makeText(MainActivity.this, "Login clicked", Toast.LENGTH_LONG).show();
            }
          }, "login");
         return true;
      }
   }

   @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;
   }

}

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