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Hi,
I have created an app that uses ViewPager and all pages contain WebViews. Every Webview contains server images, videos, mp3 ...
The WebView settings are
public Object instantiateItem(View collection, int position) {
.
.
.
final RelativeLayout imageLayout = (RelativeLayout)
inflater.inflate(R.layout.omb_webview_layout, null);
WebView webview = (WebView) imageLayout.findViewById(R.id.video_view);
ProgressBar pbImage = (ProgressBar) imageLayout.findViewById(R.id.progressBar1);
webview.requestFocus(View.FOCUS_DOWN);
webview.getSettings().setBuiltInZoomControls(false);
webview.getSettings().setSupportZoom(true);
webview.getSettings().setUseWideViewPort(true);
webview.getSettings().setJavaScriptEnabled(true);
webview.getSettings().setLoadWithOverviewMode(true);
webview.getSettings().setUseWideViewPort(true);
webview.setWebViewClient(new mWebViewClient());
webview.getSettings().setPluginsEnabled(true);
webview.clearCache(true);
webview.clearHistory();
if(Pbar != null) {
webview.setWebChromeClient(new WebChromeClient() {
public void onProgressChanged(WebView view, int progress) {
Log.i(TAG, "webview loading progress : "+ progress);
if(progress == 100) {
try {
Pbar.setVisibility(ProgressBar.GONE);
} catch (Exception e) {
Log.e(TAG, "timer progress GONE : "+ progress,e);
}
}
});
}
The problem is when pages are swiped then also this line
Log.i(TAG, "webview loading progress : "+ progress);
is executing which means that webviews are loading in background. If I swipe 4 or more pages all webviews are loading.
destroyItem(View collection, int position, Object o) {
Log.d("DESTROY", "destroying view at position sheetal " + position);
RelativeLayout view = (RelativeLayout)o;
WebView tmp = webviewDictionary.get(position);;
tmp.getSettings().setJavaScriptEnabled(false);
tmp.stopLoading();
if(tmp != null){
Log.i(TAG, "sheetal webview is destroyed " +position );
try {
tmp.onPause();
tmp.loadDataWithBaseURL("about:blank", "<html></html>","text/html", "UTF-8", null);
tmp=null;
// tmp.destroy();
}
catch (Exception e) {
Log.i(TAG, "webview destroyed Exception 0" ,e);
}
}
How to stop background loading if the pages are not visible? setOffscreenPageLimit(1)(means 3 page prev,cur,next),
In Viewpager, 2 page (means 1 position page) is not loading properly. It shows a blank white page, how do I solve it?
Thanks in advance
275
this solved my problem.
i have created a dictionary, it contains 3 webview with position as key.
here i am adding webviews in dictionary
public Object instantiateItem(View collection, int position) {
.
.
.
webviewDictionary.put(position, webView);
.
.
.
}
cleaning webviews is from dictionary
public void cleanAllWebViews() {
try {
if(webviewDictionary != null){
Iterator<Integer> webViewIterator = webviewDictionary.keySet().iterator();
while(webViewIterator.hasNext()) {
Integer key=(Integer)webViewIterator.next();
WebView webView = (WebView) webviewDictionary.get(key);
webView.stopLoading();
// webView.pauseTimers();
webView.setWebChromeClient(null);
webView.setWebViewClient(null);
webView.loadDataWithBaseURL("about:blank", "<html></html>","text/html", "UTF-8", null);
webViewIterator.remove();
}
}
webviewDictionary = null;
}catch (Exception e) {
Log.e(TAG, "ombook last call onPauseAllWebviews Exception",e );
}
}
and
@Override
public void onBackPressed() {
cleanAllWebViews();
System.gc();
super.onBackPressed();
}
have you tried "OffscreenPageLimit" set to 1 ? 0 is an invalid value according to this post: ViewPager.setOffscreenPageLimit(0) doesn't work as expected
also , have you tried to handle some events of switching between the pages , so that each time you switch a page , the current page's webview will stop loading , or start loading an empty html file?
21
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