Activity中Webview的Html按钮点击检测(java代码) [英] Webview's Html button click detection in Activity(java code)
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问题描述
我试图将 webview 的 html 按钮点击检测到 java 代码(活动中).
我提到了另一个 SO
通过javascript检测点击HTML按钮安卓网页视图
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
但不起作用.我的代码:
but is not working.My code:
index.html
<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;
}
}
但是没有调用 performClick() 方法.
请更正错误.
But the performClick() method is not being called.
Please correct the error.
推荐答案
我是这样实现的:
public class FirstActivity extends Activity {
WebView mWebView;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_first);
mWebView = (WebView) findViewById(R.id.webView1);
mWebView.getSettings().setJavaScriptEnabled(true);
mWebView.getSettings().setDomStorageEnabled(true);
mWebView.addJavascriptInterface(new WebAppInterface(this), "Android");
mWebView.loadUrl("file:///android_asset/html/File1.html");
}
public class WebAppInterface {
Context mContext;
/** Instantiate the interface and set the context */
WebAppInterface(Context c) {
mContext = c;
}
/** Show a toast from the web page */
@JavascriptInterface
public void nextScreen(String pro_cat_id) {
startActivity(new Intent(mContext,
MainActivity.class));
}
并且，在 html 文件中:
And, in html file:
javascript:file3.js
javascript: file3.js
function saveId(_id)
{
localStorage.setItem("id", _id);
Android.nextScreen(_id);
}
HTML:
<html>
<head>
<script type="text/javascript" src="arel/js/File3.js"></script>
</head>
<body>
<button onClick="saveId('1');">1</button>
<button onClick="saveId('2');">2</button>
</body>
</html>
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