我正尝试使用在Android Web视图上使用JS Facebook SDK的Facebook登录按钮。当我点击它打开一个新页面，并重定向到https://www.facebook.com/dialog/oauth ...这是一个JavaScript代码的空白页面。 webview保持在这里。Android Webview上的Facebook登录按钮重定向到空白页
我使用：
webview.getSettings().setJavaScriptEnabled(true);
webview.getSettings().setAppCacheEnabled(true);
webview.getSettings().setJavaScriptCanOpenWindowsAutomatically(true);
谢谢！
您需要添加逻辑重定向回到您网站的原始网址。
为了做到这一点，你需要首先创建一个扩展WebViewClient类和覆盖onPageFinished方法这样一个新的Java类：
public class CustomWebViewClient extends WebViewClient
{
@Override
public void onPageFinished(WebView view, String url) {
//https://www.facebook.com/dialog/permissions.request
//actually works for me, but I put the URL you say is coming up
//blank in there instead, whatever works for you:
if(url.startsWith("https://www.facebook.com/dialog/oauth")){
String redirectUrl = "http://www.mydomain.com/MyApp/";
view.loadUrl(redirectUrl);
return;
}
super.onPageFinished(view, url);
}
}
其次，只需将其添加到您的的WebView：
webview.setWebViewClient(new CustomWebViewClient());
一旦页面被加载完成，它会重定向回您的原始页面
我不知道我当时做了什么，但问题解决了。我会给你的代码。试着找出:)
WebView browser,mWebviewPop;
private void open(){
browser = (WebView)findViewById(R.id.webView1);
browser.getSettings().setLoadsImagesAutomatically(true);
browser.getSettings().setJavaScriptEnabled(true);
browser.getSettings().setAppCacheEnabled(true);
browser.getSettings().setJavaScriptCanOpenWindowsAutomatically(true);
browser.getSettings().setSupportMultipleWindows(true);
browser.setWebViewClient(new MyBrowser());
browser.setWebChromeClient(new MyCustomChromeClient());
mContext=this.getApplicationContext();
browser.loadUrl(target_url);
MainActivity.this.progressBar.setProgress(0);
browser.setDownloadListener(new DownloadListener() {
public void onDownloadStart(String url, String userAgent,
String contentDisposition, String mimetype,
long contentLength) {
Intent intent = new Intent(Intent.ACTION_VIEW);
intent.setData(Uri.parse(url));
startActivity(intent);
}
});
}
private class MyBrowser extends WebViewClient {
String redirectUrl = "MY URL";
private void noInternet() {
WebView webview = (WebView) findViewById(R.id.webView1);
RelativeLayout tryAgainLayout = (RelativeLayout)findViewById(R.id.tryAgainLayout);
RelativeLayout progressLayout = (RelativeLayout)findViewById(R.id.progressLayout);
tryAgainLayout.setVisibility(View.VISIBLE);
webview.setVisibility(View.GONE);
webview.destroy();
progressLayout.setVisibility(View.INVISIBLE);
}
public void visible(){
WebView webview = (WebView) findViewById(R.id.webView1);
RelativeLayout tryAgainLayout = (RelativeLayout)findViewById(R.id.tryAgainLayout);
RelativeLayout progressLayout = (RelativeLayout)findViewById(R.id.progressLayout);
tryAgainLayout.setVisibility(View.INVISIBLE);
webview.setVisibility(View.INVISIBLE);
progressLayout.setVisibility(View.VISIBLE);
}
public void unvisible(){
WebView webview = (WebView) findViewById(R.id.webView1);
RelativeLayout tryAgainLayout = (RelativeLayout)findViewById(R.id.tryAgainLayout);
RelativeLayout progressLayout = (RelativeLayout)findViewById(R.id.progressLayout);
tryAgainLayout.setVisibility(View.INVISIBLE);
webview.setVisibility(View.VISIBLE);
progressLayout.setVisibility(View.INVISIBLE);
}
@Override
public boolean shouldOverrideUrlLoading(WebView view, String url) {
String host = Uri.parse(url).getHost();
if (host.equals(target_url_prefix))
{
if(mWebviewPop!=null)
{
mWebviewPop.setVisibility(View.GONE);
baseLayout.removeView(mWebviewPop);
mWebviewPop=null;
}
return false;
}
if(host.equals("m.facebook.com"))
{
return false;
}
view.loadUrl(url);
return true;
}
@Override
public void onReceivedError(WebView view, int errorCode,
String description, String failingUrl) {
noInternet();
}
@Override
public void onPageStarted(WebView view, String url, Bitmap favicon) {
visible();
}
@Override
public void onPageFinished(WebView view, String url) {
unvisible();
System.out.println("\n" +view.getUrl());
if(url.startsWith("https://m.facebook.com/v2.1/dialog/oauth")){
if(mWebviewPop!=null)
{
mWebviewPop.setVisibility(View.GONE);
baseLayout.removeView(mWebviewPop);
mWebviewPop=null;
}
view.loadUrl(redirectUrl);
return;
}
super.onPageFinished(view, url);
}
}
private class MyCustomChromeClient extends WebChromeClient
{
@Override
public boolean onCreateWindow(WebView view, boolean isDialog,
boolean isUserGesture, Message resultMsg) {
mWebviewPop = new WebView(mContext);
mWebviewPop.setVerticalScrollBarEnabled(false);
mWebviewPop.setHorizontalScrollBarEnabled(false);
mWebviewPop.setWebViewClient(new MyBrowser());
mWebviewPop.getSettings().setJavaScriptEnabled(true);
mWebviewPop.getSettings().setSavePassword(false);
mWebviewPop.setLayoutParams(new RelativeLayout.LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT,
ViewGroup.LayoutParams.MATCH_PARENT));
baseLayout.addView(mWebviewPop);
WebView.WebViewTransport transport = (WebView.WebViewTransport) resultMsg.obj;
transport.setWebView(mWebviewPop);
resultMsg.sendToTarget();
return true;
}
@Override
public void onCloseWindow(WebView window) {
}
@Override
public void onProgressChanged(WebView view, int newProgress) {
MainActivity.this.setValue(newProgress);
super.onProgressChanged(view, newProgress);
}
}
谢谢。它看起来像我的代码。我不明白'url.startsWith（“https://m.facebook.com/v2.1/dialog/oauth”）不会关闭权限对话框。我会尝试 – Marc
行，所以从我可以告诉，这里发生了什么是有两个“办法”对OAuth的工作，要么它会调用回“到aparent页”（如弹出“登录我“登录），或者它可以将你重定向到一个登录页面，然后到另一个URL（非弹出式样式），在成功或失败之后（一种链式向前）。不幸的是，它看起来WebView并不适合“回调父页面”风格，所以你必须做一些欺骗，比如有第二个WebView（jincy在这里的答案，或者也参见this）。
如果我需要获取用户的Facebook权限，该怎么办？所以我需要的是重新定向到原来的网址后按权限页面中的确定按钮，而不是在这个https：//www.facebook.com/dialog/oauth .... –
@jincyabraham你找到一个解决方案。我有同样的问题 – Marc
@Marc请尝试下面的解决方案 –