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CallbackProxy.javaAPI DocAndroid 1.5 API39919Wed May 06 22:41:56 BST 2009android.webkit

CallbackProxy

public class CallbackProxy extends android.os.Handler
This class is a proxy class for handling WebCore -> UI thread messaging. All the callback functions are called from the WebCore thread and messages are posted to the UI thread for the actual client callback.

Fields Summary
private static final String
LOGTAG
private volatile WebViewClient
mWebViewClient
private volatile WebChromeClient
mWebChromeClient
private final WebView
mWebView
private volatile DownloadListener
mDownloadListener
private boolean
mProgressUpdatePending
private volatile int
mLatestProgress
private final WebBackForwardList
mBackForwardList
private final android.content.Context
mContext
private static final int
PAGE_STARTED
private static final int
RECEIVED_ICON
private static final int
RECEIVED_TITLE
private static final int
OVERRIDE_URL
private static final int
AUTH_REQUEST
private static final int
SSL_ERROR
private static final int
PROGRESS
private static final int
UPDATE_VISITED
private static final int
LOAD_RESOURCE
private static final int
CREATE_WINDOW
private static final int
CLOSE_WINDOW
private static final int
SAVE_PASSWORD
private static final int
JS_ALERT
private static final int
JS_CONFIRM
private static final int
JS_PROMPT
private static final int
JS_UNLOAD
private static final int
ASYNC_KEYEVENTS
private static final int
TOO_MANY_REDIRECTS
private static final int
DOWNLOAD_FILE
private static final int
REPORT_ERROR
private static final int
RESEND_POST_DATA
private static final int
PAGE_FINISHED
private static final int
REQUEST_FOCUS
private static final int
SCALE_CHANGED
private static final int
RECEIVED_CERTIFICATE
private static final int
SWITCH_OUT_HISTORY
private static final int
NOTIFY
private long
mWebCoreThreadTime
Constructors Summary
public CallbackProxy(android.content.Context context, WebView w)
Construct a new CallbackProxy.

        // Used to start a default activity.
        mContext = context;
        mWebView = w;
        mBackForwardList = new WebBackForwardList();
Methods Summary
public WebViewcreateWindow(boolean dialog, boolean userGesture)

        // Do an unsynchronized quick check to avoid posting if no callback has
        // been set.
        if (mWebChromeClient == null) {
            return null;
        }

        WebView.WebViewTransport transport = mWebView.new WebViewTransport();
        final Message msg = obtainMessage(NOTIFY);
        msg.obj = transport;
        synchronized (this) {
            sendMessage(obtainMessage(CREATE_WINDOW, dialog ? 1 : 0,
                    userGesture ? 1 : 0, msg));
            try {
                wait();
            } catch (InterruptedException e) {
                Log.e(LOGTAG,
                        "Caught exception while waiting for createWindow");
                Log.e(LOGTAG, Log.getStackTraceString(e));
            }
        }

        WebView w = transport.getWebView();
        if (w != null) {
            w.getWebViewCore().initializeSubwindow();
        }
        return w;
public voiddoUpdateVisitedHistory(java.lang.String url, boolean isReload)

        // Do an unsynchronized quick check to avoid posting if no callback has
        // been set.
        if (mWebViewClient == null) {
            return;
        }
        sendMessage(obtainMessage(UPDATE_VISITED, isReload ? 1 : 0, 0, url));
public WebBackForwardListgetBackForwardList()
Get the Back/Forward list to return to the user or to update the cached history list.

        return mBackForwardList;
private java.lang.StringgetJsDialogTitle(java.lang.String url)

        String title = url;
        if (URLUtil.isDataUrl(url)) {
            // For data: urls, we just display 'JavaScript' similar to Safari.
            title = mContext.getString(R.string.js_dialog_title_default);
        } else {
            try {
                URL aUrl = new URL(url);
                // For example: "The page at 'http://www.mit.edu' says:"
                title = mContext.getString(R.string.js_dialog_title,
                        aUrl.getProtocol() + "://" + aUrl.getHost());
            } catch (MalformedURLException ex) {
                // do nothing. just use the url as the title
            }
        }
        return title;
public intgetProgress()
Return the latest progress.

        return mLatestProgress;
public voidhandleMessage(android.os.Message msg)

        // We don't have to do synchronization because this function operates
        // in the UI thread. The WebViewClient and WebChromeClient functions
        // that check for a non-null callback are ok because java ensures atomic
        // 32-bit reads and writes.
        switch (msg.what) {
            case PAGE_STARTED:
                if (mWebViewClient != null) {
                    mWebViewClient.onPageStarted(mWebView,
                            msg.getData().getString("url"),
                            (Bitmap) msg.obj);
                }
                break;

            case PAGE_FINISHED:
                if (mWebViewClient != null) {
                    mWebViewClient.onPageFinished(mWebView, (String) msg.obj);
                }
                break;
                
            case RECEIVED_ICON:
                if (mWebChromeClient != null) {
                    mWebChromeClient.onReceivedIcon(mWebView, (Bitmap) msg.obj);
                }
                break;

            case RECEIVED_TITLE:
                if (mWebChromeClient != null) {
                    mWebChromeClient.onReceivedTitle(mWebView,
                            (String) msg.obj);
                }
                break;

            case TOO_MANY_REDIRECTS:
                Message cancelMsg =
                        (Message) msg.getData().getParcelable("cancelMsg");
                Message continueMsg =
                        (Message) msg.getData().getParcelable("continueMsg");
                if (mWebViewClient != null) {
                    mWebViewClient.onTooManyRedirects(mWebView, cancelMsg,
                            continueMsg);
                } else {
                    cancelMsg.sendToTarget();
                }
                break;

            case REPORT_ERROR:
                if (mWebViewClient != null) {
                    int reasonCode = msg.arg1;
                    final String description  = msg.getData().getString("description");
                    final String failUrl  = msg.getData().getString("failingUrl");
                    mWebViewClient.onReceivedError(mWebView, reasonCode,
                            description, failUrl);
                }
                break;

            case RESEND_POST_DATA:
                Message resend =
                        (Message) msg.getData().getParcelable("resend");
                Message dontResend =
                        (Message) msg.getData().getParcelable("dontResend");
                if (mWebViewClient != null) {
                    mWebViewClient.onFormResubmission(mWebView, dontResend,
                            resend);
                } else {
                    dontResend.sendToTarget();
                }
                break;

            case OVERRIDE_URL:
                String overrideUrl = msg.getData().getString("url");
                boolean override = uiOverrideUrlLoading(overrideUrl);
                ResultTransport<Boolean> result =
                        (ResultTransport<Boolean>) msg.obj;
                synchronized (this) {
                    result.setResult(override);
                    notify();
                }
                break;

            case AUTH_REQUEST:
                if (mWebViewClient != null) {
                    HttpAuthHandler handler = (HttpAuthHandler) msg.obj;
                    String host = msg.getData().getString("host");
                    String realm = msg.getData().getString("realm");
                    mWebViewClient.onReceivedHttpAuthRequest(mWebView, handler,
                            host, realm);
                }
                break;

            case SSL_ERROR:
                if (mWebViewClient != null) {
                    HashMap<String, Object> map = 
                        (HashMap<String, Object>) msg.obj;
                    mWebViewClient.onReceivedSslError(mWebView,
                            (SslErrorHandler) map.get("handler"),
                            (SslError) map.get("error"));
                }
                break;

            case PROGRESS:
                // Synchronize to ensure mLatestProgress is not modified after
                // setProgress is called and before mProgressUpdatePending is
                // changed.
                synchronized (this) {
                    if (mWebChromeClient != null) {
                        mWebChromeClient.onProgressChanged(mWebView,
                                mLatestProgress);
                    }
                    mProgressUpdatePending = false;
                }
                break;

            case UPDATE_VISITED:
                if (mWebViewClient != null) {
                    mWebViewClient.doUpdateVisitedHistory(mWebView,
                            (String) msg.obj, msg.arg1 != 0);
                }
                break;

            case LOAD_RESOURCE:
                if (mWebViewClient != null) {
                    mWebViewClient.onLoadResource(mWebView, (String) msg.obj);
                }
                break;

            case DOWNLOAD_FILE:
                if (mDownloadListener != null) {
                    String url = msg.getData().getString("url");
                    String userAgent = msg.getData().getString("userAgent");
                    String contentDisposition =
                        msg.getData().getString("contentDisposition");
                    String mimetype = msg.getData().getString("mimetype");
                    Long contentLength = msg.getData().getLong("contentLength");

                    mDownloadListener.onDownloadStart(url, userAgent,
                            contentDisposition, mimetype, contentLength);
                }
                break;

            case CREATE_WINDOW:
                if (mWebChromeClient != null) {
                    if (!mWebChromeClient.onCreateWindow(mWebView,
                                msg.arg1 == 1, msg.arg2 == 1,
                                (Message) msg.obj)) {
                        synchronized (this) {
                            notify();
                        }
                    }
                }
                break;

            case REQUEST_FOCUS:
                if (mWebChromeClient != null) {
                    mWebChromeClient.onRequestFocus(mWebView);
                }
                break;

            case CLOSE_WINDOW:
                if (mWebChromeClient != null) {
                    mWebChromeClient.onCloseWindow((WebView) msg.obj);
                }
                break;

            case SAVE_PASSWORD:
                Bundle bundle = msg.getData();
                String schemePlusHost = bundle.getString("host");
                String username = bundle.getString("username");
                String password = bundle.getString("password");
                // If the client returned false it means that the notify message
                // will not be sent and we should notify WebCore ourselves.
                if (!mWebView.onSavePassword(schemePlusHost, username, password,
                            (Message) msg.obj)) {
                    synchronized (this) {
                        notify();
                    }
                }
                break;

            case ASYNC_KEYEVENTS:
                if (mWebViewClient != null) {
                    mWebViewClient.onUnhandledKeyEvent(mWebView,
                            (KeyEvent) msg.obj);
                }
                break;

            case JS_ALERT:
                if (mWebChromeClient != null) {
                    final JsResult res = (JsResult) msg.obj;
                    String message = msg.getData().getString("message");
                    String url = msg.getData().getString("url");
                    if (!mWebChromeClient.onJsAlert(mWebView, url, message,
                            res)) {
                        new AlertDialog.Builder(mContext)
                                .setTitle(getJsDialogTitle(url))
                                .setMessage(message)
                                .setPositiveButton(R.string.ok,
                                        new AlertDialog.OnClickListener() {
                                            public void onClick(
                                                    DialogInterface dialog,
                                                    int which) {
                                                res.confirm();
                                            }
                                        })
                                .setCancelable(false)
                                .show();
                    }
                    res.setReady();
                }
                break;

            case JS_CONFIRM:
                if (mWebChromeClient != null) {
                    final JsResult res = (JsResult) msg.obj;
                    String message = msg.getData().getString("message");
                    String url = msg.getData().getString("url");
                    if (!mWebChromeClient.onJsConfirm(mWebView, url, message,
                            res)) {
                        new AlertDialog.Builder(mContext)
                                .setTitle(getJsDialogTitle(url))
                                .setMessage(message)
                                .setPositiveButton(R.string.ok, 
                                        new DialogInterface.OnClickListener() {
                                            public void onClick(
                                                    DialogInterface dialog,
                                                    int which) {
                                                res.confirm();
                                            }})
                                .setNegativeButton(R.string.cancel, 
                                        new DialogInterface.OnClickListener() {
                                            public void onClick(
                                                    DialogInterface dialog,
                                                    int which) {
                                                res.cancel();
                                            }})
                                .show();
                    }
                    // Tell the JsResult that it is ready for client
                    // interaction.
                    res.setReady();
                }
                break;

            case JS_PROMPT:
                if (mWebChromeClient != null) {
                    final JsPromptResult res = (JsPromptResult) msg.obj;
                    String message = msg.getData().getString("message");
                    String defaultVal = msg.getData().getString("default");
                    String url = msg.getData().getString("url");
                    if (!mWebChromeClient.onJsPrompt(mWebView, url, message,
                                defaultVal, res)) {
                        final LayoutInflater factory = LayoutInflater
                                .from(mContext);
                        final View view = factory.inflate(R.layout.js_prompt,
                                null);
                        final EditText v = (EditText) view
                                .findViewById(R.id.value);
                        v.setText(defaultVal);
                        ((TextView) view.findViewById(R.id.message))
                                .setText(message);
                        new AlertDialog.Builder(mContext)
                                .setTitle(getJsDialogTitle(url))
                                .setView(view)
                                .setPositiveButton(R.string.ok,
                                        new DialogInterface.OnClickListener() {
                                            public void onClick(
                                                    DialogInterface dialog,
                                                    int whichButton) {
                                                res.confirm(v.getText()
                                                        .toString());
                                            }
                                        })
                                .setNegativeButton(R.string.cancel,
                                        new DialogInterface.OnClickListener() {
                                            public void onClick(
                                                    DialogInterface dialog,
                                                    int whichButton) {
                                                res.cancel();
                                            }
                                        })
                                .setOnCancelListener(
                                        new DialogInterface.OnCancelListener() {
                                            public void onCancel(
                                                    DialogInterface dialog) {
                                                res.cancel();
                                            }
                                        })
                                .show();
                    }
                    // Tell the JsResult that it is ready for client
                    // interaction.
                    res.setReady();
                }
                break;

            case JS_UNLOAD:
                if (mWebChromeClient != null) {
                    final JsResult res = (JsResult) msg.obj;
                    String message = msg.getData().getString("message");
                    String url = msg.getData().getString("url");
                    if (!mWebChromeClient.onJsBeforeUnload(mWebView, url,
                            message, res)) {
                        final String m = mContext.getString(
                                R.string.js_dialog_before_unload, message);
                        new AlertDialog.Builder(mContext)
                                .setMessage(m)
                                .setPositiveButton(R.string.ok,
                                        new DialogInterface.OnClickListener() {
                                            public void onClick(
                                                    DialogInterface dialog,
                                                    int which) {
                                                res.confirm();
                                            }
                                        })
                                .setNegativeButton(R.string.cancel,
                                        new DialogInterface.OnClickListener() {
                                            public void onClick(
                                                    DialogInterface dialog,
                                                    int which) {
                                                res.cancel();
                                            }
                                        })
                                .show();
                    }
                    res.setReady();
                }
                break;

            case RECEIVED_CERTIFICATE:
                mWebView.setCertificate((SslCertificate) msg.obj);
                break;

            case NOTIFY:
                synchronized (this) {
                    notify();
                }
                break;

            case SCALE_CHANGED:
                if (mWebViewClient != null) {
                    mWebViewClient.onScaleChanged(mWebView, msg.getData()
                            .getFloat("old"), msg.getData().getFloat("new"));
                }
                break;

            case SWITCH_OUT_HISTORY:
                mWebView.switchOutDrawHistory();
                break;
        }
public voidonCloseWindow(WebView window)

        // Do an unsynchronized quick check to avoid posting if no callback has
        // been set.
        if (mWebChromeClient == null) {
            return;
        }
        sendMessage(obtainMessage(CLOSE_WINDOW, window));
public booleanonDownloadStart(java.lang.String url, java.lang.String userAgent, java.lang.String contentDisposition, java.lang.String mimetype, long contentLength)
Starts a download if a download listener has been registered, otherwise return false.

        // Do an unsynchronized quick check to avoid posting if no callback has
        // been set.
        if (mDownloadListener == null) {
            // Cancel the download if there is no browser client.
            return false;
        }

        Message msg = obtainMessage(DOWNLOAD_FILE);
        Bundle bundle = msg.getData();
        bundle.putString("url", url);
        bundle.putString("userAgent", userAgent);
        bundle.putString("mimetype", mimetype);
        bundle.putLong("contentLength", contentLength);
        bundle.putString("contentDisposition", contentDisposition);
        sendMessage(msg);
        return true;
public voidonFormResubmission(android.os.Message dontResend, android.os.Message resend)

        // Do an unsynchronized quick check to avoid posting if no callback has
        // been set.
        if (mWebViewClient == null) {
            dontResend.sendToTarget();
            return;
        }

        Message msg = obtainMessage(RESEND_POST_DATA);
        Bundle bundle = msg.getData();
        bundle.putParcelable("resend", resend);
        bundle.putParcelable("dontResend", dontResend);
        sendMessage(msg);
public voidonJsAlert(java.lang.String url, java.lang.String message)

        // Do an unsynchronized quick check to avoid posting if no callback has
        // been set.
        if (mWebChromeClient == null) {
            return;
        }
        JsResult result = new JsResult(this, false);
        Message alert = obtainMessage(JS_ALERT, result);
        alert.getData().putString("message", message);
        alert.getData().putString("url", url);
        synchronized (this) {
            sendMessage(alert);
            try {
                wait();
            } catch (InterruptedException e) {
                Log.e(LOGTAG, "Caught exception while waiting for jsAlert");
                Log.e(LOGTAG, Log.getStackTraceString(e));
            }
        }
public booleanonJsBeforeUnload(java.lang.String url, java.lang.String message)

        // Do an unsynchronized quick check to avoid posting if no callback has
        // been set.
        if (mWebChromeClient == null) {
            return true;
        }
        JsResult result = new JsResult(this, true);
        Message confirm = obtainMessage(JS_UNLOAD, result);
        confirm.getData().putString("message", message);
        confirm.getData().putString("url", url);
        synchronized (this) {
            sendMessage(confirm);
            try {
                wait();
            } catch (InterruptedException e) {
                Log.e(LOGTAG, "Caught exception while waiting for jsUnload");
                Log.e(LOGTAG, Log.getStackTraceString(e));
            }
        }
        return result.getResult();
public booleanonJsConfirm(java.lang.String url, java.lang.String message)

        // Do an unsynchronized quick check to avoid posting if no callback has
        // been set.
        if (mWebChromeClient == null) {
            return false;
        }
        JsResult result = new JsResult(this, false);
        Message confirm = obtainMessage(JS_CONFIRM, result);
        confirm.getData().putString("message", message);
        confirm.getData().putString("url", url);
        synchronized (this) {
            sendMessage(confirm);
            try {
                wait();
            } catch (InterruptedException e) {
                Log.e(LOGTAG, "Caught exception while waiting for jsConfirm");
                Log.e(LOGTAG, Log.getStackTraceString(e));
            }
        }
        return result.getResult();
public java.lang.StringonJsPrompt(java.lang.String url, java.lang.String message, java.lang.String defaultValue)

        // Do an unsynchronized quick check to avoid posting if no callback has
        // been set.
        if (mWebChromeClient == null) {
            return null;
        }
        JsPromptResult result = new JsPromptResult(this);
        Message prompt = obtainMessage(JS_PROMPT, result);
        prompt.getData().putString("message", message);
        prompt.getData().putString("default", defaultValue);
        prompt.getData().putString("url", url);
        synchronized (this) {
            sendMessage(prompt);
            try {
                wait();
            } catch (InterruptedException e) {
                Log.e(LOGTAG, "Caught exception while waiting for jsPrompt");
                Log.e(LOGTAG, Log.getStackTraceString(e));
            }
        }
        return result.getStringResult();
public voidonLoadResource(java.lang.String url)

        // Do an unsynchronized quick check to avoid posting if no callback has
        // been set.
        if (mWebViewClient == null) {
            return;
        }
        sendMessage(obtainMessage(LOAD_RESOURCE, url));
public voidonPageFinished(java.lang.String url)

        // Do an unsynchronized quick check to avoid posting if no callback has
        // been set.
        if (mWebViewClient == null) {
            return;
        }
        // Performance probe
        if (false) {
            Log.d("WebCore", "WebCore thread used " + 
                    (SystemClock.currentThreadTimeMillis() - mWebCoreThreadTime)
                    + " ms");
            Network.getInstance(mContext).stopTiming();
        }
        Message msg = obtainMessage(PAGE_FINISHED, url);
        sendMessage(msg);
public voidonPageStarted(java.lang.String url, android.graphics.Bitmap favicon)

        // Do an unsynchronized quick check to avoid posting if no callback has
        // been set.
        if (mWebViewClient == null) {
            return;
        }
        // Performance probe
        if (false) {
            mWebCoreThreadTime = SystemClock.currentThreadTimeMillis();
            Network.getInstance(mContext).startTiming();
        }
        Message msg = obtainMessage(PAGE_STARTED);
        msg.obj = favicon;
        msg.getData().putString("url", url);
        sendMessage(msg);
public voidonProgressChanged(int newProgress)

        // Synchronize so that mLatestProgress is up-to-date.
        synchronized (this) {
            mLatestProgress = newProgress;
            if (mWebChromeClient == null) {
                return;
            }
            if (!mProgressUpdatePending) {
                sendEmptyMessage(PROGRESS);
                mProgressUpdatePending = true;
            }
        }
public voidonReceivedCertificate(android.net.http.SslCertificate certificate)

hide
- hide this because it contains a parameter of type SslCertificate, which is located in a hidden package.

        // Do an unsynchronized quick check to avoid posting if no callback has
        // been set.
        if (mWebViewClient == null) {
            return;
        }
        // here, certificate can be null (if the site is not secure)
        sendMessage(obtainMessage(RECEIVED_CERTIFICATE, certificate));
public voidonReceivedError(int errorCode, java.lang.String description, java.lang.String failingUrl)

        // Do an unsynchronized quick check to avoid posting if no callback has
        // been set.
        if (mWebViewClient == null) {
            return;
        }

        Message msg = obtainMessage(REPORT_ERROR);
        msg.arg1 = errorCode;
        msg.getData().putString("description", description);
        msg.getData().putString("failingUrl", failingUrl);
        sendMessage(msg);
public voidonReceivedHttpAuthRequest(HttpAuthHandler handler, java.lang.String hostName, java.lang.String realmName)

        // Do an unsynchronized quick check to avoid posting if no callback has
        // been set.
        if (mWebViewClient == null) {
            handler.cancel();
            return;
        }
        Message msg = obtainMessage(AUTH_REQUEST, handler);
        msg.getData().putString("host", hostName);
        msg.getData().putString("realm", realmName);
        sendMessage(msg);
public voidonReceivedIcon(android.graphics.Bitmap icon)

        // The current item might be null if the icon was already stored in the
        // database and this is a new WebView.
        WebHistoryItem i = mBackForwardList.getCurrentItem();
        if (i != null) {
            i.setFavicon(icon);
        }
        // Do an unsynchronized quick check to avoid posting if no callback has
        // been set.
        if (mWebChromeClient == null) {
            return;
        }
        sendMessage(obtainMessage(RECEIVED_ICON, icon));
public voidonReceivedSslError(SslErrorHandler handler, android.net.http.SslError error)

hide
- hide this because it contains a parameter of type SslError. SslError is located in a hidden package.

        // Do an unsynchronized quick check to avoid posting if no callback has
        // been set.
        if (mWebViewClient == null) {
            handler.cancel();
            return;
        }
        Message msg = obtainMessage(SSL_ERROR);
        //, handler);
        HashMap<String, Object> map = new HashMap();
        map.put("handler", handler);
        map.put("error", error);
        msg.obj = map;
        sendMessage(msg);
public voidonReceivedTitle(java.lang.String title)

        // Do an unsynchronized quick check to avoid posting if no callback has
        // been set.
        if (mWebChromeClient == null) {
            return;
        }
        sendMessage(obtainMessage(RECEIVED_TITLE, title));
public voidonRequestFocus()

        // Do an unsynchronized quick check to avoid posting if no callback has
        // been set.
        if (mWebChromeClient == null) {
            return;
        }

        sendEmptyMessage(REQUEST_FOCUS);
public booleanonSavePassword(java.lang.String schemePlusHost, java.lang.String username, java.lang.String password, android.os.Message resumeMsg)

        // resumeMsg should be null at this point because we want to create it
        // within the CallbackProxy.
        if (Config.DEBUG) {
            junit.framework.Assert.assertNull(resumeMsg);
        }
        resumeMsg = obtainMessage(NOTIFY);

        Message msg = obtainMessage(SAVE_PASSWORD, resumeMsg);
        Bundle bundle = msg.getData();
        bundle.putString("host", schemePlusHost);
        bundle.putString("username", username);
        bundle.putString("password", password);
        synchronized (this) {
            sendMessage(msg);
            try {
                wait();
            } catch (InterruptedException e) {
                Log.e(LOGTAG,
                        "Caught exception while waiting for onSavePassword");
                Log.e(LOGTAG, Log.getStackTraceString(e));
            }
        }
        // Doesn't matter here
        return false;
public voidonScaleChanged(float oldScale, float newScale)

        // Do an unsynchronized quick check to avoid posting if no callback has
        // been set.
        if (mWebViewClient == null) {
            return;
        }
        Message msg = obtainMessage(SCALE_CHANGED);
        Bundle bundle = msg.getData();
        bundle.putFloat("old", oldScale);
        bundle.putFloat("new", newScale);
        sendMessage(msg);
public voidonTooManyRedirects(android.os.Message cancelMsg, android.os.Message continueMsg)

        // Do an unsynchronized quick check to avoid posting if no callback has
        // been set.
        if (mWebViewClient == null) {
            cancelMsg.sendToTarget();
            return;
        }

        Message msg = obtainMessage(TOO_MANY_REDIRECTS);
        Bundle bundle = msg.getData();
        bundle.putParcelable("cancelMsg", cancelMsg);
        bundle.putParcelable("continueMsg", continueMsg);
        sendMessage(msg);
public voidonUnhandledKeyEvent(android.view.KeyEvent event)

        // Do an unsynchronized quick check to avoid posting if no callback has
        // been set.
        if (mWebViewClient == null) {
            return;
        }
        sendMessage(obtainMessage(ASYNC_KEYEVENTS, event));
public voidsetDownloadListener(DownloadListener client)
Set the client DownloadListener.

param
client An implementation of DownloadListener.

        mDownloadListener = client;
public voidsetWebChromeClient(WebChromeClient client)
Set the WebChromeClient.

param
client An implementation of WebChromeClient.

        mWebChromeClient = client;
public voidsetWebViewClient(WebViewClient client)
Set the WebViewClient.

param
client An implementation of WebViewClient.

        mWebViewClient = client;
public booleanshouldOverrideUrlLoading(java.lang.String url)
Called by the WebCore side

        // We have a default behavior if no client exists so always send the
        // message.
        ResultTransport<Boolean> res = new ResultTransport<Boolean>();
        Message msg = obtainMessage(OVERRIDE_URL);
        msg.getData().putString("url", url);
        msg.obj = res;
        synchronized (this) {
            sendMessage(msg);
            try {
                wait();
            } catch (InterruptedException e) {
                Log.e(LOGTAG, "Caught exception while waiting for overrideUrl");
                Log.e(LOGTAG, Log.getStackTraceString(e));
            }
        }
        return res.getResult().booleanValue();
voidswitchOutDrawHistory()
Called by WebCore side to switch out of history Picture drawing mode

        sendMessage(obtainMessage(SWITCH_OUT_HISTORY));
public booleanuiOverrideKeyEvent(android.view.KeyEvent event)
Called by UI side.

        if (mWebViewClient != null) {
            return mWebViewClient.shouldOverrideKeyEvent(mWebView, event);
        }
        return false;
public booleanuiOverrideUrlLoading(java.lang.String overrideUrl)
Called by the UI side. Calling overrideUrlLoading from the WebCore side will post a message to call this method.

        if (overrideUrl == null || overrideUrl.length() == 0) {
            return false;
        }
        boolean override = false;
        if (mWebViewClient != null) {
            override = mWebViewClient.shouldOverrideUrlLoading(mWebView,
                    overrideUrl);
        } else {
            Intent intent = new Intent(Intent.ACTION_VIEW,
                    Uri.parse(overrideUrl));
            intent.addCategory(Intent.CATEGORY_BROWSABLE);
            // If another application is running a WebView and launches the
            // Browser through this Intent, we want to reuse the same window if
            // possible.
            intent.putExtra(Browser.EXTRA_APPLICATION_ID,
                    mContext.getPackageName());
            try {
                mContext.startActivity(intent);
                override = true;
            } catch (ActivityNotFoundException ex) {
                // If no application can handle the URL, assume that the
                // browser can handle it.
            }
        }
        return override;