如何从HTML文件中检测div标签？ [英] how to detect div tag from html file?
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问题描述
我加载HTML页面的Web视图。在HTML中有一个按钮;重要的是点击，我要开始新的活动。我已经显示的HTML文件，但如何检测按钮的点击？
I am loading html page in web view. In html there is a button; on click of that, I have to start a new activity. I have displayed html file but how to detect the click of button ?
HTML code的按钮：
没有为按钮定义单独的css文件。
html code for button: There is separate css file defined for button.
<div id="button">
<ul>
<li><a title="Forming a Habit" href="Forming_Habit.html">
More
<span class="arrows">
»
</span>
</a></li>
</ul>
</div>
code加载HTML：
code for loading html:
webView.setWebViewClient(new MyWebViewClient());
WebSettings webSetting = webView.getSettings();
webSetting.setJavaScriptEnabled(true);
webSetting.setPluginState(WebSettings.PluginState.ON_DEMAND);
//webSetting.setBuiltInZoomControls(true);
webSetting.setAllowContentAccess(true);
webSetting.setDefaultTextEncodingName("utf-8");
webView.loadUrl("file:///android_asset/"+htmlFile);
webViewClient类：
webViewClient class:
@Override
public boolean shouldOverrideUrlLoading(WebView view, String url) {
view.loadUrl(url);
view.addJavascriptInterface(new Object(){
return true;
}
请指引我。
推荐答案
试试这个
MainActivity.java
public class MainActivity extends Activity {
WebView webView;
JavaScriptInterface jsInterface;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
webView = (WebView) findViewById(R.id.webView1);
WebSettings webSettings = webView.getSettings();
// enable JavaScript
webView.getSettings().setJavaScriptEnabled(true);
webView.setWebChromeClient(new WebChromeClient() {
});
jsInterface = new JavaScriptInterface(MainActivity.this, webView);
webView.getSettings().setJavaScriptEnabled(true);
webView.addJavascriptInterface(jsInterface, "AndroidFunction");
webView.loadUrl("file:///android_asset/book.html");
}
public class JavaScriptInterface {
private Activity activity;
WebView wb;
public JavaScriptInterface(Activity activiy, WebView wb) {
this.activity = activiy;
this.wb = wb;
}
@JavascriptInterface
public void activity() {
try {
Class activity = Class.forName("com.example.classname");
Intent myIntent = new Intent(getApplicationContext(), activity);
startActivity(myIntent);
finish();
} catch (ClassNotFoundException e) {
e.printStackTrace();
}
}
}
}
book.html
<!DOCTYPE html>
<html>
<body>
<button type="button" onclick="startactivity()">Click Me!</button>
<script>
function startactivity() {
AndroidFunction.activity();
}
</script>
</body>
</html>
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