[英]WebView showing blank white page when trying Facebook login
I'm loading a webpage in a WebView. 我正在WebView中加载网页。 On clicking login through Facebook, I'm getting blank white screen. 在通过Facebook单击登录时,出现空白屏幕。 URL which is getting called is something like this: https://m.facebook.com/dialog/oauth?access_token=...
被调用的URL是这样的: https://m.facebook.com/dialog/oauth?access_token=...
Here's my piece of code: 这是我的代码:
onCreate(): 的onCreate():
CookieManager cookieManager = CookieManager.getInstance();
cookieManager.setAcceptCookie(true);
WebSettings webSettings = wvMain.getSettings();
webSettings.setJavaScriptEnabled(true);
webSettings.setAppCacheEnabled(true);
webSettings.setJavaScriptCanOpenWindowsAutomatically(true);
//webSettings.setSupportMultipleWindows(true);
wvMain.setWebChromeClient(new UriChromeClient());
wvMain.setWebViewClient(new UriWebViewClient());
wvMain.loadUrl(myUrl);
UriWebViewClient UriWebViewClient
private class UriWebViewClient extends WebViewClient {
@Override
public void onReceivedError(WebView view, int errorCode,
String description, String failingUrl) {
super.onReceivedError(view, errorCode, description, failingUrl);
wvMain.loadUrl(lastUrl);
}
@Override
public void onPageFinished(WebView view, String url) {
super.onPageFinished(view, url);
lastUrl = url;
}
@Override
public void onReceivedSslError(WebView view, SslErrorHandler handler,
SslError error) {
super.onReceivedSslError(view, handler, error);
}
@Override
public boolean shouldOverrideUrlLoading(WebView view, String url) {
try {
if (url.startsWith("http:") || url.startsWith("https:")) {
return false;
}
else if (url.startsWith("tel:")) {
//do something
return true;
} else if (url.startsWith("mailto:")) {
//do something
return true;
}
} catch (Exception e) {
e.printStackTrace();
}
return true;
}
}
UriChromeClient UriChromeClient
class UriChromeClient extends WebChromeClient {
@Override
public boolean onCreateWindow(WebView view, boolean isDialog,
boolean isUserGesture, Message resultMsg) {
WebView.WebViewTransport transport = (WebView.WebViewTransport) resultMsg.obj;
transport.setWebView(wvMain);
resultMsg.sendToTarget();
return true;
}
@Override
public void onCloseWindow(WebView window) {
}
}
Is I set webSettings.setSupportMultipleWindows(true);
我是否设置了webSettings.setSupportMultipleWindows(true);
in onCreate(), app crashes with following exception: IllegalArgumentException: Parent WebView cannot host it's own popup window. 在onCreate()中,应用程序崩溃,但发生以下异常: IllegalArgumentException:父WebView无法承载其自己的弹出窗口。 Please use WebSettings.setSupportMultipleWindows(false) 请使用WebSettings.setSupportMultipleWindows(false)
Any help appreciated. 任何帮助表示赞赏。 I'm stuck on this from many days. 从很多天开始我就一直坚持下去。
EDIT: Based on linked question in comment, I changed my onCreateWindow
as follows: 编辑:基于注释中的链接的问题,我如下更改了我的onCreateWindow
:
class UriChromeClient extends WebChromeClient {
@Override
public boolean onCreateWindow(WebView view, boolean isDialog,
boolean isUserGesture, Message resultMsg) {
WebView wvMain = new WebView(mContext);
wvMain.setVerticalScrollBarEnabled(false);
wvMain.setHorizontalScrollBarEnabled(false);
wvMain.setWebViewClient(new UriWebViewClient());
WebSettings webSettings = wvMain.getSettings();
webSettings.setJavaScriptEnabled(true);
webSettings.setAppCacheEnabled(true);
webSettings.setJavaScriptCanOpenWindowsAutomatically(true);
webSettings.setSupportMultipleWindows(true);
wvMain.setLayoutParams(new FrameLayout.LayoutParams(
ViewGroup.LayoutParams.MATCH_PARENT,
ViewGroup.LayoutParams.MATCH_PARENT));
mContainer.addView(wvMain);
WebView.WebViewTransport transport = (WebView.WebViewTransport) resultMsg.obj;
transport.setWebView(wvMain);
resultMsg.sendToTarget();
return true;
}
}
Now app doesn't crash, but same white/blank screen issue is there. 现在,应用程序不会崩溃,但是存在相同的白屏/黑屏问题。
by changing onCreateWindow to below, I finally got login screen: 通过将onCreateWindow更改为以下内容,我终于获得了登录屏幕:
@Override
public boolean onCreateWindow(WebView view, boolean isDialog,
boolean isUserGesture, Message resultMsg) {
wvMain.setVisibility(View.GONE);
CookieManager cookieManager = CookieManager.getInstance();
cookieManager.setAcceptCookie(true);
WebView wvNew = new WebView(mContext);
wvNew.setVerticalScrollBarEnabled(false);
wvNew.setHorizontalScrollBarEnabled(false);
wvNew.setWebViewClient(new UriWebViewClient());
WebSettings webSettings = wvNew.getSettings();
webSettings.setJavaScriptEnabled(true);
webSettings.setAppCacheEnabled(true);
webSettings.setJavaScriptCanOpenWindowsAutomatically(true);
webSettings.setSupportMultipleWindows(true);
wvNew.setLayoutParams(new FrameLayout.LayoutParams(
ViewGroup.LayoutParams.MATCH_PARENT,
ViewGroup.LayoutParams.MATCH_PARENT));
mContainer.addView(wvNew);
WebView.WebViewTransport transport = (WebView.WebViewTransport) resultMsg.obj;
transport.setWebView(wvNew);
resultMsg.sendToTarget();
return true;
}
But after successful login, I'm getting a blank screen but that's story for another day. 但是,成功登录后,我得到了一个空白屏幕,但这是另一天的故事。
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