我正在使用扩展 WebChromeClient
的 WebView
打开一个网页。
当我使用 setWebViewClient
时,它只会提示我一个白屏,所以我猜测它不支持 Authentication
。当我尝试创建自定义的 WebViewClient
时,发现它有一个叫做 onReceivedHttpAuthRequest
的方法,我认为这是正确的位置,但是如何在屏幕上显示弹窗呢?
public class BaseWebViewClient extends WebViewClient {
public enum SpinnerMode {
ALWAYS,
FIRST,
DISABLED
}
private final CoordinatorLayout webViewContainer;
private final RelativeLayout progressBarOverlay;
private WeakReference<BaseWebViewActivity> activityRef;
private BaseWebViewStateRemover stateRemover = new BaseWebViewStateRemover();
private boolean isFirstPage = true;
private SpinnerMode spinnerMode;
public BaseWebViewClient(BaseWebViewActivity activity, CoordinatorLayout container, RelativeLayout progressBarOverlay, SpinnerMode spinnerMode) {
this.activityRef = new WeakReference<BaseWebViewActivity>(activity);
this.webViewContainer = container;
this.progressBarOverlay = progressBarOverlay;
this.spinnerMode = spinnerMode != null ? spinnerMode : SpinnerMode.DISABLED;
}
@Override
public boolean shouldOverrideUrlLoading(WebView view, String url) {
view.loadUrl(url);
return true;
}
@Override
public void onReceivedSslError(WebView view, SslErrorHandler handler, SslError error) {
Logger.e("onReceivedSslError: " + (error != null ? error.toString() : "null"));
BaseWebViewActivity activity = activityRef.get();
if (activity != null) {
activity.onReceivedSslError(view, handler, error);
}
super.onReceivedSslError(view, handler, error);
}
@Nullable
@Override
public WebResourceResponse shouldInterceptRequest(final WebView view, WebResourceRequest request) {
BaseWebViewActivity context = this.activityRef.get();
if(context != null) {
stateRemover.removeStateOnLogoutRequestMatch(context, request, view, webViewContainer);
} else {
Logger.w("Cannot remove app session context fully, activity reference is null");
}
return super.shouldInterceptRequest(view, request);
}
@Override
public void onPageStarted(final WebView webView, String url, Bitmap favicon) {
super.onPageStarted(webView, url, favicon);
Logger.d("Webview loading started for URL " + filterHashFragment(url));
if (spinnerMode == SpinnerMode.ALWAYS
|| spinnerMode == SpinnerMode.FIRST && isFirstPage) {
progressBarOverlay.setVisibility(View.VISIBLE);
webView.setVisibility(View.GONE);
}
}
@Override
public void onPageFinished(final WebView webView, String url) {
super.onPageFinished(webView, url);
Logger.d("Webview loading finished for URL " + filterHashFragment(url));
if (spinnerMode == SpinnerMode.ALWAYS
|| spinnerMode == SpinnerMode.FIRST && isFirstPage) {
// Add short delay because onPageFinished triggers often a bit early causing the
// previous page to be briefly shown.
SystemClock.sleep(150);
Activity activity = activityRef.get();
if(activity != null) {
activity.runOnUiThread(new Runnable() {
@Override
public void run() {
progressBarOverlay.setVisibility(View.GONE);
webView.setVisibility(View.VISIBLE);
}
});
} else {
Logger.w("activity is not available");
}
}
if (isFirstPage)
isFirstPage = false;
}
private String filterHashFragment(String url) {
return url.split("#")[0];
}
}
ChromeClient(它永远不会到达onJsAlert)
public class BaseWebChromeClient extends WebChromeClient {
private WeakReference<BaseWebViewActivity> activityRef;
public BaseWebChromeClient(BaseWebViewActivity activity) {
this.activityRef = new WeakReference<BaseWebViewActivity>(activity);
}
@Override
public boolean onConsoleMessage(ConsoleMessage cm) {
Log.i("js console: ", cm.message() + " -- line "
+ cm.lineNumber() + " of "
+ cm.sourceId());
return true;
}
@Override
public boolean onJsAlert(WebView view, String url, String message, JsResult result) {
Log.i("testing123", "got js alert");
return super.onJsAlert(view, url, message, result);
}
}
我在这里调用Webview:
webView = findViewById(R.id.baseWebView);
webViewContainer = findViewById(R.id.webview_container);
WebSettings webSettings = webView.getSettings();
webSettings.setJavaScriptEnabled(true);
webSettings.setDomStorageEnabled(true);
webSettings.setDatabaseEnabled(true);
webView.getSettings().setAllowUniversalAccessFromFileURLs(true);
webView.getSettings().setAllowFileAccess(true);
webSettings.setJavaScriptCanOpenWindowsAutomatically(true);
webView.setWebChromeClient(new BaseWebChromeClient(this));
webView.setWebViewClient(new BaseWebViewClient(this, webViewContainer,
(RelativeLayout)findViewById(R.id.progressBarOverlay), getSpinnerMode(intent)));
如果不可能的话,也许可以在点击登录按钮时创建自定义登录界面。但是当创建自定义界面时,如何将
登录详情(用户名/密码)
发送到WebViewClient
,以及如何从那里获取响应等问题。
编辑!!
添加了我的自定义客户端代码。在这样的情况下,将用户名和密码提供给
onReceivedHttpAuthRequest
:@Override
public void onReceivedHttpAuthRequest(WebView view, final HttpAuthHandler handler, String host, String realm) {
handler.proceed("username", "password");
}
应用程序登录并按照预期继续执行。当我提供错误的凭据时,应用程序会给出一个错误:
网页不可用
,net::ERR_TOO_MANY_RETRIES
,而当我什么也不提供时,我只能看到一个空白屏幕。