如何在我的代码中修复密码/用户名validation？
我有一个应用程序，我使用我的用户名和密码登录，然后切换到包含webview的页面。 webview识别此用户名和密码并加载内容（通过共享偏好），但问题是，它只加载ONCE当我导航到我的应用程序的其他部分并返回时，它显示一个空白屏幕，最终加载页面不能在网页视图中显示出来。 有没有解决这个问题，以保持webview识别用户名并通过每次你导航到页面并加载内容。这是相同的代码：包含webview的页面：
public class AnswersFragmentWebView extends Fragment implements MainActivity.BackPressListener { private static final String SYMBOL = "symbol"; private static final String SYMBOL_TYPE = "symbol_type"; public static final String CONTAINER_ID = "container_id"; public static final String TAG_QUOTES_FRAGMENT_WEBVIEW = "AnswersFragmentWebView"; public static void removeInstance(final FragmentManager manager) { final AnswersFragmentWebView fragment = (AnswersFragmentWebView) manager.findFragmentByTag(TAG_QUOTES_FRAGMENT_WEBVIEW); if (fragment == null) { return; } final FragmentStackManager stackManager = FragmentStackManager.getInstance(); if (stackManager.getTopFragment() instanceof AnswersFragmentWebView) { stackManager.popTopFragment(); } } private boolean goingBack = false; private boolean onBackPressClearStack = true; private WebView webView; private final static String URL = "https://amers1.mobile13.cp.justice.com/msf1.0/fwd/answers/answers/service/v1/?q=ibm%20revenue&ui.theme=dark&uuid=PADACT-002&userAgent=iphone"; //private final static String URL = "https://www.google.com"; SharedPreferencesManager manager = SharedPreferencesManager.getInstance(); private final String USERNAME =manager.getLoginUsername(); private final String PASSWORD = manager.getDecryptedLoginPassword(); private final static String HOST = "https://amers1.mobile13.cp.justice.com/msf1.0/fwd/answers/answers/service/v1/?q=ibm%20revenue&ui.theme=novadark&uuid=PADACT-002&userAgent=iphone"; private final static String REALM = "Users Only"; public void setOnBackPressClearStack(boolean b){ onBackPressClearStack = b; } public boolean webViewSteppedBack() { if (webView != null && webView.canGoBack()) { webView.goBack(); return true; } return false; } @Override public boolean backPressed(final MainActivity mainActivity) { if (webViewSteppedBack()) { return true; } if (onBackPressClearStack) { goingBack = true; FragmentUtils.onBackPressedKnockFragsOffStack(mainActivity, this); } return false; } private static AnswersFragmentWebView __newInstance(final AnswersFragmentWebView fragment, final FragmentManager manager, final String searchAutoSuggestSymbol, final String symbolType, int containerViewId, final int inAnimation, final int outAnimation, final int popInAnimation, final int popOutAnimation) { final Bundle bundle = new Bundle(); bundle.putString(AnswersFragmentWebView.SYMBOL, searchAutoSuggestSymbol); bundle.putString(AnswersFragmentWebView.SYMBOL_TYPE, symbolType); bundle.putInt(AnswersFragmentWebView.CONTAINER_ID, containerViewId); fragment.setArguments(bundle); FragmentInfo fragmentInfo = new FragmentInfo(TransactionMethods.ADD, containerViewId); fragmentInfo.setAnimation(inAnimation, outAnimation); fragmentInfo.setPopAnimation(popInAnimation, popOutAnimation); fragmentInfo.setFragmentTag(TAG_QUOTES_FRAGMENT_WEBVIEW); fragmentInfo.setActionBarTitle(Application.getAppResources().getString(R.string.nav_option_quotes)); FragmentStackManager.getInstance().transitionFragment(manager, fragment, fragmentInfo); return fragment; } private static AnswersFragmentWebView __newInstance(final AnswersFragmentWebView fragment, final FragmentManager manager, final String searchAutoSuggestSymbol, final String symbolType, int containerViewId) { return __newInstance(fragment, manager, searchAutoSuggestSymbol, symbolType, containerViewId, R.anim.slide_in_from_right, R.anim.slide_out_to_left, R.anim.slide_in_from_left, R.anim.slide_out_to_right); } private static void clearWebView(final FragmentManager manager) { final AnswersFragmentWebView fragment = (AnswersFragmentWebView) manager.findFragmentByTag(TAG_QUOTES_FRAGMENT_WEBVIEW); if (fragment != null && fragment instanceof AnswersFragmentWebView) { ((AnswersFragmentWebView)fragment).clearWebView(); } } public static AnswersFragmentWebView newInstance(final FragmentManager manager, final String searchAutoSuggestSymbol, String symbolType) { clearWebView(manager); return __newInstance(new AnswersFragmentWebView(), manager, searchAutoSuggestSymbol, symbolType, R.id.fragment_container); } public static AnswersFragmentWebView newInstance(final FragmentManager manager, final String searchAutoSuggestSymbol, String symbolType, int containerViewId) { clearWebView(manager); return __newInstance(new AnswersFragmentWebView(), manager, searchAutoSuggestSymbol, symbolType, containerViewId); } public static AnswersFragmentWebView newInstanceNoBackPressed(final FragmentManager manager, final String searchAutoSuggestSymbol, final String symbolType, int containerViewId) { AnswersFragmentWebView fragment = __newInstance(new AnswersFragmentWebView(), manager, searchAutoSuggestSymbol, symbolType, containerViewId); fragment.setOnBackPressClearStack(false); return fragment; } public static AnswersFragmentWebView newInstanceNoBackPressed(final AnswersFragmentWebView fragment, final FragmentManager manager, final String searchAutoSuggestSymbol, final String symbolType, int containerViewId) { fragment.setOnBackPressClearStack(false); return __newInstance(fragment, manager, searchAutoSuggestSymbol, symbolType, containerViewId); } public static AnswersFragmentWebView newInstanceForSearch(final FragmentManager manager, final String searchAutoSuggestSymbol, String symbolType) { AnswersFragmentWebView fragment = __newInstance(new AnswersFragmentWebView(), manager, searchAutoSuggestSymbol, symbolType, R.id.fragment_container, R.anim.no_animation, R.anim.slide_out_to_right, R.anim.slide_in_from_right, R.anim.slide_out_to_right); return fragment; } public void clearWebView() { if (webView != null) { webView.removeAllViews(); webView.destroy(); webView = null; } } @SuppressWarnings("deprecation") @SuppressLint("NewApi") @Override public View onCreateView(final LayoutInflater inflater, final ViewGroup container, final Bundle savedInstanceState) { super.onCreate(savedInstanceState); if (goingBack) { return null; } final MainActivity activity = (MainActivity) getActivity(); activity.setBackPressListener(this); final View view = inflater.inflate(R.layout.fragment_search_answers, container, false); if (!NetworkUtils.isOnline()) { LayoutUtils.showNoResult(view, R.id.quotes_webview_container); return view; } // setup webview webView = (WebView) view.findViewById(R.id.webview); webView.setVisibility(View.VISIBLE); webView.getSettings().setJavaScriptEnabled(true); webView.setWebChromeClient(new WebChromeClient()); webView.setBackgroundColor(0); webView.requestFocus(); webView.reload(); webView.getSettings().setSavePassword(true); webView.getSettings().setSaveFormData(true); webView.getSettings().getSaveFormData(); webView.getSettings().getSavePassword(); //WebViewDatabase.getInstance(getActivity()).clearHttpAuthUsernamePassword(); WebViewDatabase.getInstance(getActivity()).hasHttpAuthUsernamePassword(); webView.setHttpAuthUsernamePassword(HOST, REALM, USERNAME, PASSWORD); webView.setWebViewClient(new AnswersWebView(this,webView)); webView.loadUrl(URL); return view; } @Override public void onCreate(final Bundle savedInstanceState) { super.onCreate(savedInstanceState); getArguments().getString(AnswersFragmentWebView.SYMBOL); } } webview客户端：
public class AnswersWebView extends WebViewClient { private String loginCookie; private Context mContext; private WebView mWebView; public AnswersWebView(AnswersFragmentWebView answersFragmentWebView, WebView webview) { super(); //mContext = answersFragmentWebView; mWebView = webview; } @Override public void onPageStarted( WebView view, String url, Bitmap favicon ) { } @Override public void onPageFinished( WebView view, String url ) { CookieManager cookieManager = CookieManager.getInstance(); cookieManager.setCookie(url, loginCookie); } @Override public void onReceivedError( WebView view, int errorCode, String description, String failingUrl ) { Toast.makeText(view.getContext(), "ÉyÅ[ÉWì«Ç›çûÇ›ÉGÉâÅ[", Toast.LENGTH_LONG).show(); } @Override public void onLoadResource( WebView view, String url ){ CookieManager cookieManager = CookieManager.getInstance(); loginCookie = cookieManager.getCookie(url); } @Override public boolean shouldOverrideUrlLoading( WebView view, String url ) { return false; } @Override public void onReceivedSslError( WebView view, SslErrorHandler handler, SslError error ) { handler.proceed(); } @Override public void onReceivedHttpAuthRequest( WebView view, final HttpAuthHandler handler, final String host, final String realm ){ SharedPreferencesManager manager = SharedPreferencesManager.getInstance(); String userName = manager.getLoginUsername(); String userPass = manager.getDecryptedLoginPassword(); if (handler.useHttpAuthUsernamePassword() && view != null) { String[] haup = view.getHttpAuthUsernamePassword(host, realm); if (haup != null && haup.length == 2) { userName = haup[0]; userPass = haup[1]; } } if (userName != null && userPass != null) { handler.proceed(userName, userPass); } else { showHttpAuthDialog(handler, host, realm, null, null, null); } } private void showHttpAuthDialog( final HttpAuthHandler handler, final String host, final String realm, final String title, final String name, final String password ) { LinearLayout llayout = new LinearLayout((Activity)mContext); final TextView textview1 = new TextView((Activity)mContext); final EditText edittext1 = new EditText((Activity)mContext); final TextView textview2 = new TextView((Activity)mContext); final EditText edittext2 = new EditText((Activity)mContext); llayout.setOrientation(LinearLayout.VERTICAL); textview1.setText("username:"); textview2.setText("password:"); llayout.addView(textview1); llayout.addView(edittext1); llayout.addView(textview2); llayout.addView(edittext2); final Builder mHttpAuthDialog = new AlertDialog.Builder((Activity)mContext); mHttpAuthDialog.setTitle("Basic Authentication") .setView(llayout) .setCancelable(false) .setPositiveButton("OK", new DialogInterface.OnClickListener() { public void onClick(DialogInterface dialog, int whichButton) { EditText etUserName = edittext1; String userName = etUserName.getText().toString(); EditText etUserPass = edittext2; String userPass = etUserPass.getText().toString(); mWebView.setHttpAuthUsernamePassword(host, realm, name, password); handler.proceed(userName, userPass); } }) .setNegativeButton("Cancel", new DialogInterface.OnClickListener() { public void onClick(DialogInterface dialog, int whichButton) { handler.cancel(); } }) .create().show(); } }
谢谢！ 贾斯汀
好。
你必须在onResume而不是OnCreate中添加用户名/密码
比如本文档中的解释http://developer.android.com/reference/android/app/Activity.html
将SharedPref代码移动到onClick并在此处报告…
这是cookie管理的问题。
案例：~1如果您正在访问其他网站（Facebook，gmail等）要解决这个问题，您必须维护通过vebView发布的cookie文件。
并将其发送回下次新页面请求。
案例：~2如果您访问自己的网站，那么另一个问题解决方案是您可以检查服务器端（在您的网站中）设备信息并将其与登录时的设备信息进行比较。
或者您可以在隐藏标签中发送隐藏数据并在您的应用中validation它。
在我之前的项目中，我遇到了一些类似的问题。 我用这种方法解决了这个问题 – 在onCreate中实现了空白/默认布局，然后从sharedPref加载配置并在onResume中设置布局的参数值。 在离开页面之前保存onPause内的配置更改（如果发生）。 如果这看起来不错，你可以在你的情况下检查它。