我正在尝试创建 web 视图的水平“列表视图”。正如先前对问题的回答所建议的那样，我正在使用兼容包中的 ViewPager 库。
不幸的是，当我将我的 webview 添加到视图集合时，使用
((ViewPager) collection).addView((View)mainContent,0);
我得到了选角问题。
09-07 20:45:30.690: ERROR/AndroidRuntime(8166): java.lang.ClassCastException: android.webkit.WebView cannot be cast to android.support.v4.view.ViewPager
这会使应用程序崩溃。
现在这几乎是有道理的，转换不同的数据类型会使事情出错，但是在我拥有的 ViewPager 示例应用程序中，他们将 TextView 转换为 ViewPager 这是一个视图......
我只是不知道还有什么其他方式可以真正“存储”我的视图并在应用程序中显示它们！我有
private class AwesomePagerAdapter extends PagerAdapter{
LayoutInflater layoutInflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
@Override
public int getCount() {
return NUM_AWESOME_VIEWS;
}
@Override
public Object instantiateItem(View collection, int position) {
ViewPager viewPager = (ViewPager) collection;
collection = layoutInflater.inflate(R.layout.maincontentview, null);
WebView mainContent = (WebView)collection.findViewById(R.id.mainContent);
JSInterface jsInterface = new JSInterface(mainContent);
Display display = getWindowManager().getDefaultDisplay();
int width = display.getWidth();
int height = display.getHeight();
//jsInterface.fit(width, height);
//jsInterface.flip(width, height);
WebSettings webSettings = mainContent.getSettings();
webSettings.setJavaScriptEnabled(true);
webSettings.setPluginsEnabled(true);
webSettings.setLoadsImagesAutomatically(true);
webSettings.setSupportZoom(false);
mainContent.setVerticalScrollBarEnabled(false);
mainContent.setHorizontalScrollBarEnabled(false);
/*mainContent.setOnTouchListener(new View.OnTouchListener() {
public boolean onTouch(View v, MotionEvent event) {
return(event.getAction() == MotionEvent.ACTION_MOVE);
}
});*/
mainContent.setWebViewClient(new WebViewClient()
{
@Override
public void onPageFinished(WebView view, String url)
{
/*mainContent.loadUrl("javascript:var script = document.createElement('script');" +
"script.type = 'text/javascript';" +
"script.src = 'jquery.min.js';" +
"document.getElementsByTagName('head')[0].appendChild(script);");*/
WebView mainContent = (WebView)view.findViewById(R.id.mainContent);
Display display = getWindowManager().getDefaultDisplay();
int width = display.getWidth();
int height = display.getHeight();
mainContent.loadUrl("javascript:fit("+width+","+height+");");
mainContent.loadUrl("javascript:flip("+width+","+height+");");
}
});
mainContent.setWebChromeClient(new WebChromeClient()
{
@Override
public boolean onJsAlert(WebView view, String url, String message, JsResult result)
{
Log.e("alert triggered", message);
return false;
}
});
//use load file from string, article[i].html
mainContent.loadUrl("file:///android_asset/cache_manifest_test.html");
((ViewPager) collection).addView((View)mainContent,0);
return mainContent;
}
/**
* Remove a page for the given position. The adapter is responsible
* for removing the view from its container, although it only must ensure
* this is done by the time it returns from {@link #finishUpdate()}.
*
* @param container The containing View from which the page will be removed.
* @param position The page position to be removed.
* @param object The same object that was returned by
* {@link #instantiateItem(View, int)}.
*/
@Override
public void destroyItem(View collection, int position, Object view) {
((ViewPager) collection).removeView((WebView) view);
}
@Override
public boolean isViewFromObject(View view, Object object) {
return view==((WebView)object);
}
/**
* Called when the a change in the shown pages has been completed. At this
* point you must ensure that all of the pages have actually been added or
* removed from the container as appropriate.
* @param container The containing View which is displaying this adapter's
* page views.
*/
@Override
public void finishUpdate(View arg0) {}
@Override
public void restoreState(Parcelable arg0, ClassLoader arg1) {}
@Override
public Parcelable saveState() {
return null;
}
@Override
public void startUpdate(View arg0) {}
}