我已经用 webview 创建了 Android 应用程序。尝试使用 Google 登录时，它首先要求输入用户名和密码，然后显示带有“请关闭此窗口”消息的屏幕，但没有任何反应。
用户也没有登录。
PS 这在我的移动网站上非常有效，该网站本身已移植到 Android Webview 应用程序。谁能告诉为什么这不起作用？我对 Android 完全陌生。
这是工作代码：
public class MainActivity extends Activity {
protected WebView mainWebView;
// private ProgressBar mProgress;
private Context mContext;
private WebView mWebviewPop;
private FrameLayout mContainer;
private ProgressBar progress;
private String url = "http://m.example.com";
private String target_url_prefix = "m.example.com";
public void onBackPressed() {
if (mainWebView.isFocused() && mainWebView.canGoBack()) {
mainWebView.goBack();
} else {
super.onBackPressed();
finish();
}
}
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
mContext = this.getApplicationContext();
// Get main webview
mainWebView = (WebView) findViewById(R.id.webView);
progress = (ProgressBar) findViewById(R.id.progressBar);
progress.setMax(100);
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT) {
mainWebView.setWebContentsDebuggingEnabled(true);
}
mainWebView.getSettings().setUserAgentString("example_android_app");
// Cookie manager for the webview
CookieManager cookieManager = CookieManager.getInstance();
cookieManager.setAcceptCookie(true);
// Get outer container
mContainer = (FrameLayout) findViewById(R.id.webview_frame);
if (!InternetConnection.checkNetworkConnection(this)) {
showAlert(this, "No network found",
"Please check your internet settings.");
} else {
// Settings
WebSettings webSettings = mainWebView.getSettings();
webSettings.setJavaScriptEnabled(true);
webSettings.setAppCacheEnabled(true);
webSettings.setJavaScriptCanOpenWindowsAutomatically(true);
webSettings.setSupportMultipleWindows(true);
mainWebView.setWebViewClient(new MyCustomWebViewClient());
mainWebView.setScrollBarStyle(View.SCROLLBARS_OUTSIDE_OVERLAY);
mainWebView.setWebChromeClient(new MyCustomChromeClient());
mainWebView.loadUrl(url);
}
}
// @Override
// public boolean onCreateOptionsMenu(Menu menu) {
// // Inflate the menu; this adds items to the action bar if it is present.
// getMenuInflater().inflate(R.menu.example_main, menu);
// return true;
// }
private class MyCustomWebViewClient extends WebViewClient {
@Override
public void onPageStarted(WebView view, String url, Bitmap favicon) {
progress.setProgress(0);
progress.setVisibility(View.VISIBLE);
super.onPageStarted(view, url, favicon);
}
@Override
public boolean shouldOverrideUrlLoading(WebView view, String url) {
String host = Uri.parse(url).getHost();
Log.d("shouldOverrideUrlLoading", host);
//Toast.makeText(MainActivity.this, host,
//Toast.LENGTH_SHORT).show();
if (host.equals(target_url_prefix)) {
// This is my web site, so do not override; let my WebView load
// the page
if (mWebviewPop != null) {
mWebviewPop.setVisibility(View.GONE);
mContainer.removeView(mWebviewPop);
mWebviewPop = null;
}
return false;
}
if (host.contains("m.facebook.com") || host.contains("facebook.co")
|| host.contains("google.co")
|| host.contains("www.facebook.com")
|| host.contains(".google.com")
|| host.contains(".google.co")
|| host.contains("accounts.google.com")
|| host.contains("accounts.google.co.in")
|| host.contains("www.accounts.google.com")
|| host.contains("www.twitter.com")
|| host.contains("secure.payu.in")
|| host.contains("https://secure.payu.in")
|| host.contains("oauth.googleusercontent.com")
|| host.contains("content.googleapis.com")
|| host.contains("ssl.gstatic.com")) {
return false;
}
// Otherwise, the link is not for a page on my site, so launch
// another Activity that handles URLs
//Intent intent = new Intent(Intent.ACTION_VIEW, Uri.parse(url));
//startActivity(intent);
//return true;
return false;
}
@Override
public void onPageFinished(WebView view, String url) {
progress.setVisibility(View.GONE);
super.onPageFinished(view, url);
}
@Override
public void onReceivedSslError(WebView view, SslErrorHandler handler,
SslError error) {
Log.d("onReceivedSslError", "onReceivedSslError");
// super.onReceivedSslError(view, handler, error);
}
}
public void setValue(int progress) {
this.progress.setProgress(progress);
}
public void showAlert(Context context, String title, String text) {
AlertDialog.Builder alertDialogBuilder = new AlertDialog.Builder(
context);
// set title
alertDialogBuilder.setTitle(title);
// set dialog message
alertDialogBuilder.setMessage(text).setCancelable(false)
.setPositiveButton("OK", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int id) {
// if this button is clicked, close
// current activity
finish();
}
}).create().show();
}
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 MyCustomWebViewClient());
mWebviewPop.getSettings().setJavaScriptEnabled(true);
mWebviewPop.getSettings().setSavePassword(false);
mWebviewPop.setLayoutParams(new FrameLayout.LayoutParams(
ViewGroup.LayoutParams.MATCH_PARENT,
ViewGroup.LayoutParams.MATCH_PARENT));
mContainer.addView(mWebviewPop);
WebView.WebViewTransport transport = (WebView.WebViewTransport) resultMsg.obj;
transport.setWebView(mWebviewPop);
resultMsg.sendToTarget();
return true;
}
@Override
public void onProgressChanged(WebView view, int newProgress) {
// TODO Auto-generated method stub
super.onProgressChanged(view, newProgress);
MainActivity.this.setValue(newProgress);
}
@Override
public void onCloseWindow(WebView window) {
Log.d("onCloseWindow", "called");
}
}
}
webview 中的两件事会在谷歌登录中产生问题。
在 WebChromeClient 中使用自定义 User-Agent 和 AlertDialog 来处理弹出窗口为我解决了这些问题。
这是完整的代码：
public class MainActivity extends AppCompatActivity {
private Context contextPop;
private WebView webViewPop;
private AlertDialog builder;
private String url = "https://example.com";
private WebView webView;
private String userAgent;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
webView = findViewById(R.id.webView);
webView.setWebViewClient(new WebViewClient() {
@Override
public boolean shouldOverrideUrlLoading(WebView view, String url) {
// to continue loading a given URL in the current WebView.
// needed to handle redirects.
return false;
}
});
webView.loadUrl(url);
WebSettings webSettings = webView.getSettings();
// Set User Agent
//userAgent = System.getProperty("http.agent");
// the upper line sometimes causes "403: disallowed user agent error"
userAgent = "";
webSettings.setUserAgentString(userAgent + "Your App Info/Version");
// Enable Cookies
CookieManager.getInstance().setAcceptCookie(true);
if(android.os.Build.VERSION.SDK_INT >= 21)
CookieManager.getInstance().setAcceptThirdPartyCookies(webView, true);
// WebView Tweaks
webSettings.setJavaScriptEnabled(true);
webSettings.setRenderPriority(WebSettings.RenderPriority.HIGH);
webSettings.setCacheMode(WebSettings.LOAD_DEFAULT);
webSettings.setAppCacheEnabled(true);
webSettings.setDomStorageEnabled(true);
webSettings.setLayoutAlgorithm(WebSettings.LayoutAlgorithm.NARROW_COLUMNS);
webSettings.setUseWideViewPort(true);
webSettings.setSaveFormData(true);
webSettings.setEnableSmoothTransition(true);
webView.setScrollBarStyle(View.SCROLLBARS_INSIDE_OVERLAY);
// Handle Popups
webView.setWebChromeClient(new CustomChromeClient());
webSettings.setJavaScriptCanOpenWindowsAutomatically(true);
webSettings.setSupportMultipleWindows(true);
contextPop = this.getApplicationContext();
}
@Override
public void onBackPressed() {
if(webView.canGoBack()) {
webView.goBack();
}
else {
//super.onBackPressed();
// Terminate the app
finishAffinity();
System.exit(0);
}
}
class CustomChromeClient extends WebChromeClient {
@Override
public boolean onCreateWindow(WebView view, boolean isDialog,
boolean isUserGesture, Message resultMsg) {
webViewPop = new WebView(contextPop);
webViewPop.setWebViewClient(new WebViewClient() {
@Override
public boolean shouldOverrideUrlLoading(WebView view, String url) {
// to continue loading a given URL in the current WebView.
// needed to handle redirects.
return false;
}
});
// Enable Cookies
CookieManager cookieManager = CookieManager.getInstance();
cookieManager.setAcceptCookie(true);
if(android.os.Build.VERSION.SDK_INT >= 21) {
cookieManager.setAcceptThirdPartyCookies(webViewPop, true);
cookieManager.setAcceptThirdPartyCookies(webView, true);
}
WebSettings popSettings = webViewPop.getSettings();
// WebView tweaks for popups
webViewPop.setVerticalScrollBarEnabled(false);
webViewPop.setHorizontalScrollBarEnabled(false);
popSettings.setJavaScriptEnabled(true);
popSettings.setSaveFormData(true);
popSettings.setEnableSmoothTransition(true);
// Set User Agent
popSettings.setUserAgentString(userAgent + "Your App Info/Version");
// to support content re-layout for redirects
popSettings.setLayoutAlgorithm(WebSettings.LayoutAlgorithm.SINGLE_COLUMN);
// handle new popups
webViewPop.setWebChromeClient(new CustomChromeClient());
// set the WebView as the AlertDialog.Builder’s view
builder = new AlertDialog.Builder(MainActivity.this, AlertDialog.THEME_DEVICE_DEFAULT_LIGHT).create();
builder.setTitle("");
builder.setView(webViewPop);
builder.setButton("Close", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int id) {
webViewPop.destroy();
dialog.dismiss();
}
});
builder.show();
builder.getWindow().clearFlags(WindowManager.LayoutParams.FLAG_NOT_FOCUSABLE|WindowManager.LayoutParams.FLAG_ALT_FOCUSABLE_IM);
WebView.WebViewTransport transport = (WebView.WebViewTransport) resultMsg.obj;
transport.setWebView(webViewPop);
resultMsg.sendToTarget();
return true;
}
@Override
public void onCloseWindow(WebView window) {
//Toast.makeText(contextPop,"onCloseWindow called",Toast.LENGTH_SHORT).show();
try {
webViewPop.destroy();
} catch (Exception e) {
Log.d("Webview Destroy Error: ", e.getStackTrace().toString());
}
try {
builder.dismiss();
} catch (Exception e) {
Log.d("Builder Dismiss Error: ", e.getStackTrace().toString());
}
}
}
}
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