Java 类android.webkit.WebBackForwardList 实例源码

public void onPageFinished(WebView view) {
    if (!mIsOnReceivedTitle && mWebChromeClient != null) {

        WebBackForwardList list = null;
        try {
            list = view.copyBackForwardList();
        } catch (NullPointerException e) {
            if (LogUtils.isDebug()) {
                e.printStackTrace();
            }
        }
        if (list != null
                && list.getSize() > 0
                && list.getCurrentIndex() >= 0
                && list.getItemAtIndex(list.getCurrentIndex()) != null) {
            String previousTitle = list.getItemAtIndex(list.getCurrentIndex()).getTitle();
            mWebChromeClient.onReceivedTitle(view, previousTitle);
        }
    }
}

private void _backEvent() {
    if (this.mWebView != null && this.mWebView.canGoBack()) {
        this.mWebView.stopLoading();
        LogInfo.log("+->", "mWebView-->>back" + this.mWebView.getUrl());
        WebBackForwardList list = this.mWebView.copyBackForwardList();
        if (list.getCurrentIndex() <= 0) {
            this.pullDownUrlText.setText(String.format(getString(R.string.supplied_by), new Object[]{getUrlTitle(list.getItemAtIndex(0).getUrl())}));
        } else {
            this.pullDownUrlText.setText(String.format(getString(R.string.supplied_by), new Object[]{getUrlTitle(list.getItemAtIndex(list.getCurrentIndex() - 1).getUrl())}));
            this.titleView.setText(list.getItemAtIndex(list.getCurrentIndex() - 1).getTitle());
        }
        this.mWebView.goBack();
        if (!this.close.isShown()) {
            this.close.setVisibility(0);
        }
    } else if ("floatBallActive".equals(this.web_flag)) {
        finish();
    } else {
        finish();
    }
}

@Override
public void backAction() {
    String curUrl = webView.getUrl();
    boolean isExit = true;
    if (!TextUtils.isEmpty(curUrl)) {
        if (webView.canGoBack()) {
            WebBackForwardList backList = webView.copyBackForwardList();

            if (backList != null && backList.getCurrentIndex() == 1) {
                isExit = false;
                loadLocalHtml(articleBean.getBody());
            }
        }
    }

    if (isExit) {
        mActivity.finish();
    }
}

@Override
public boolean onKeyDown(int keyCode, KeyEvent event) {
    if (event.getAction() == KeyEvent.ACTION_DOWN && keyCode == KeyEvent.KEYCODE_BACK) {
        WebBackForwardList webBFL = webView.copyBackForwardList();
        int i = webBFL.getCurrentIndex();
        do {
            i--;
        }
        while (i >= 0 && webView.getOriginalUrl()
                .equals(webBFL.getItemAtIndex(i).getOriginalUrl()));
        if (webView.canGoBackOrForward(i - webBFL.getCurrentIndex())) {
            webView.goBackOrForward(i - webBFL.getCurrentIndex());
        } else {
            super.onBackPressed();
        }

        return true;
    }

    return false;
}

public WebBackForwardList copyBackForwardList(){

        //mWebView.saveState()
        WebBackForwardList wbfl = mWebView.copyBackForwardList();
        //mWebView.s
        return wbfl;
    }

@Override
public void onBackPressedSupport() {
    if (nswvDetailContent.canGoBack()) {
        //获取webView的浏览记录
        WebBackForwardList mWebBackForwardList = nswvDetailContent.copyBackForwardList();
        //这里的判断是为了让页面在有上一个页面的情况下，跳转到上一个html页面，而不是退出当前activity
        if (mWebBackForwardList.getCurrentIndex() > 0) {
            nswvDetailContent.goBack();
            return;
        }
    }
    super.onBackPressedSupport();
}

public void onClick(View v) {
    int id = v.getId();
    if (id == R.id.close_iv) {
        finish();
    } else if (id == R.id.back_iv) {
        if (this.mWebView.canGoBack()) {
            LogInfo.log("+->", "mWebView-->>back" + this.mWebView.getUrl());
            WebBackForwardList list = this.mWebView.copyBackForwardList();
            if (list.getCurrentIndex() <= 0) {
                this.pullDownUrlText.setText(String.format(getString(R.string.supplied_by), new Object[]{getUrlTitle(list.getItemAtIndex(0).getUrl())}));
                this.titleView.setText(list.getItemAtIndex(0).getTitle());
            } else {
                this.pullDownUrlText.setText(String.format(getString(R.string.supplied_by), new Object[]{getUrlTitle(list.getItemAtIndex(list.getCurrentIndex() - 1).getUrl())}));
                this.titleView.setText(list.getItemAtIndex(list.getCurrentIndex() - 1).getTitle());
            }
            this.mWebView.goBack();
            if (!this.close.isShown()) {
                this.close.setVisibility(0);
            }
        } else if ("floatBallActive".equals(this.web_flag)) {
            finish();
        } else {
            finish();
        }
    }
    UIsUtils.hideSoftkeyboard(this);
}

public void printBackForwardList() {
    WebBackForwardList currentList = this.copyBackForwardList();
    int currentSize = currentList.getSize();
    for(int i = 0; i < currentSize; ++i)
    {
        WebHistoryItem item = currentList.getItemAtIndex(i);
        String url = item.getUrl();
        LOG.d(TAG, "The URL at index: " + Integer.toString(i) + " is " + url );
    }
}

public boolean startOfHistory()
{
    WebBackForwardList currentList = this.copyBackForwardList();
    WebHistoryItem item = currentList.getItemAtIndex(0);
    if( item!=null){    // Null-fence in case they haven't called loadUrl yet (CB-2458)
     String url = item.getUrl();
     String currentUrl = this.getUrl();
     LOG.d(TAG, "The current URL is: " + currentUrl);
     LOG.d(TAG, "The URL at item 0 is: " + url);
     return currentUrl.equals(url);
    }
    return false;
}

public WebBackForwardList restoreState(Bundle savedInstanceState)
{
    WebBackForwardList myList = super.restoreState(savedInstanceState);
    Log.d(TAG, "WebView restoration crew now restoring!");
    //Initialize the plugin manager once more
    this.pluginManager.init();
    return myList;
}

public void printBackForwardList() {
    WebBackForwardList currentList = this.copyBackForwardList();
    int currentSize = currentList.getSize();
    for(int i = 0; i < currentSize; ++i)
    {
        WebHistoryItem item = currentList.getItemAtIndex(i);
        String url = item.getUrl();
        LOG.d(TAG, "The URL at index: " + Integer.toString(i) + " is " + url );
    }
}

public boolean startOfHistory()
{
    WebBackForwardList currentList = this.copyBackForwardList();
    WebHistoryItem item = currentList.getItemAtIndex(0);
    if( item!=null){    // Null-fence in case they haven't called loadUrl yet (CB-2458)
     String url = item.getUrl();
     String currentUrl = this.getUrl();
     LOG.d(TAG, "The current URL is: " + currentUrl);
     LOG.d(TAG, "The URL at item 0 is: " + url);
     return currentUrl.equals(url);
    }
    return false;
}

public WebBackForwardList restoreState(Bundle savedInstanceState)
{
    WebBackForwardList myList = super.restoreState(savedInstanceState);
    Log.d(TAG, "WebView restoration crew now restoring!");
    //Initialize the plugin manager once more
    this.pluginManager.init();
    return myList;
}

private void back() {
    if (webView.canGoBack()) {
        WebBackForwardList mWebBackForwardList = webView.copyBackForwardList();

        String historyUrl = mWebBackForwardList.getItemAtIndex(mWebBackForwardList.getCurrentIndex()-1).getUrl();

        webView.goBack();
        SearchText.setText(historyUrl);

    }
}

private void forward() {
    if (webView.canGoForward()) {
        WebBackForwardList mWebBackForwardList = webView.copyBackForwardList();
        String historyUrl = mWebBackForwardList.getItemAtIndex(mWebBackForwardList.getCurrentIndex()+1).getUrl();
        webView.goForward();
        SearchText.setText(webView.getUrl());

    }
}

public WebBackForwardList copyBackForwardList(){

        //mWebView.saveState()
        WebBackForwardList wbfl = mWebView.copyBackForwardList();
        //mWebView.s
        return wbfl;
    }

@Override
public void restoreWebViewState(Session session) {
    final Bundle stateData = session.getWebViewState();

    final WebBackForwardList backForwardList = stateData != null
            ? super.restoreState(stateData)
            : null;

    final String desiredURL = session.getUrl().getValue();

    client.restoreState(stateData);
    client.notifyCurrentURL(desiredURL);

    // Pages are only added to the back/forward list when loading finishes. If a new page is
    // loading when the Activity is paused/killed, then that page won't be in the list,
    // and needs to be restored separately to the history list. We detect this by checking
    // whether the last fully loaded page (getCurrentItem()) matches the last page that the
    // WebView was actively loading (which was retrieved during onSaveInstanceState():
    // WebView.getUrl() always returns the currently loading or loaded page).
    // If the app is paused/killed before the initial page finished loading, then the entire
    // list will be null - so we need to additionally check whether the list even exists.

    if (backForwardList != null &&
            backForwardList.getCurrentItem().getUrl().equals(desiredURL)) {
        // restoreState doesn't actually load the current page, it just restores navigation history,
        // so we also need to explicitly reload in this case:
        reload();
    } else {
        loadUrl(desiredURL);
    }
}

@Override
public void goBack() {
    WebBackForwardList list = mWebView.copyBackForwardList();
    int curIndex = list.getCurrentIndex();
    WebHistoryItem curItem = list.getCurrentItem();
    WebHistoryItem prevItem = list.getItemAtIndex(curIndex - 1);
    int steps = 0;
    if (prevItem != null) {
        steps--;
        if (prevItem.getUrl().equals(JoyWeb.getCookie())) {
            prevItem = list.getItemAtIndex(curIndex - 2);
            if (prevItem != null) {
                steps--;
                if (UriUtils.isEquals(prevItem.getUrl(), curItem.getUrl())) {
                    prevItem = list.getItemAtIndex(curIndex - 3);
                    if (prevItem != null) {
                        steps--;
                        goBackOrForward(steps);
                    } else {
                        mBaseView.finish();
                    }
                    return;
                }
                goBackOrForward(steps);
            } else {
                mBaseView.finish();
            }
            return;
        }
        if (goBackOrForward(steps)) {
            return;
        }
    }
    mBaseView.finish();
}

@Override
public void goForward() {
    WebBackForwardList list = mWebView.copyBackForwardList();
    int curIndex = list.getCurrentIndex();
    WebHistoryItem curItem = list.getCurrentItem();
    WebHistoryItem nextItem = list.getItemAtIndex(curIndex + 1);
    int steps = 0;
    if (nextItem != null) {
        steps++;
        if (nextItem.getUrl().equals(JoyWeb.getCookie())) {
            nextItem = list.getItemAtIndex(curIndex + 2);
            if (nextItem != null) {
                steps++;
                if (UriUtils.isEquals(nextItem.getUrl(), curItem.getUrl())) {
                    nextItem = list.getItemAtIndex(curIndex + 3);
                    if (nextItem != null) {
                        steps++;
                        goBackOrForward(steps);
                    } else {
                        mBaseView.showToast(R.string.toast_no_next_page);
                    }
                    return;
                }
                if (goBackOrForward(steps)) {
                    return;
                }
            }
        }
        if (goBackOrForward(steps)) {
            return;
        }
    }
    mBaseView.showToast(R.string.toast_no_next_page);
}

public void printBackForwardList() {
    WebBackForwardList currentList = this.copyBackForwardList();
    int currentSize = currentList.getSize();
    for(int i = 0; i < currentSize; ++i)
    {
        WebHistoryItem item = currentList.getItemAtIndex(i);
        String url = item.getUrl();
        LOG.d(TAG, "The URL at index: " + Integer.toString(i) + " is " + url );
    }
}

public boolean startOfHistory()
{
    WebBackForwardList currentList = this.copyBackForwardList();
    WebHistoryItem item = currentList.getItemAtIndex(0);
    if( item!=null){    // Null-fence in case they haven't called loadUrl yet (CB-2458)
     String url = item.getUrl();
     String currentUrl = this.getUrl();
     LOG.d(TAG, "The current URL is: " + currentUrl);
     LOG.d(TAG, "The URL at item 0 is: " + url);
     return currentUrl.equals(url);
    }
    return false;
}

public WebBackForwardList restoreState(Bundle savedInstanceState)
{
    WebBackForwardList myList = super.restoreState(savedInstanceState);
    Log.d(TAG, "WebView restoration crew now restoring!");
    //Initialize the plugin manager once more
    this.pluginManager.init();
    return myList;
}

private void onGoBackClick(boolean needFinish) {

        if (getWebWidget().canGoBack()) {

            if (getWebWidget().isCookieStatusNone()) {

                //如果没有种cookie，直接back
                getWebWidget().goBack();
            } else {

                //如果加载过cookie，则最早的历史纪录是cookieurl，不能back
                WebBackForwardList list = getWebWidget().copyBackForwardList();
                if (list != null && list.getCurrentIndex() > 1) {

                    if (mUseBottomBanner && list.getCurrentIndex() == 2) {// TODO 跳过loading页，直接关闭。暂时先这么写

                        finish();
                        return;
                    }

                    getWebWidget().goBack();
                } else {

                    if (needFinish)
                        finish();
                }
            }

        } else {

            if (needFinish)
                finish();
        }
    }

public void printBackForwardList() {
    WebBackForwardList currentList = this.copyBackForwardList();
    int currentSize = currentList.getSize();
    for(int i = 0; i < currentSize; ++i)
    {
        WebHistoryItem item = currentList.getItemAtIndex(i);
        String url = item.getUrl();
        LOG.d(TAG, "The URL at index: " + Integer.toString(i) + " is " + url );
    }
}

public boolean startOfHistory()
{
    WebBackForwardList currentList = this.copyBackForwardList();
    WebHistoryItem item = currentList.getItemAtIndex(0);
    if( item!=null){    // Null-fence in case they haven't called loadUrl yet (CB-2458)
     String url = item.getUrl();
     String currentUrl = this.getUrl();
     LOG.d(TAG, "The current URL is: " + currentUrl);
     LOG.d(TAG, "The URL at item 0 is: " + url);
     return currentUrl.equals(url);
    }
    return false;
}

public WebBackForwardList restoreState(Bundle savedInstanceState)
{
    WebBackForwardList myList = super.restoreState(savedInstanceState);
    Log.d(TAG, "WebView restoration crew now restoring!");
    //Initialize the plugin manager once more
    this.pluginManager.init();
    return myList;
}

public void printBackForwardList() {
    WebBackForwardList currentList = this.copyBackForwardList();
    int currentSize = currentList.getSize();
    for(int i = 0; i < currentSize; ++i)
    {
        WebHistoryItem item = currentList.getItemAtIndex(i);
        String url = item.getUrl();
        LOG.d(TAG, "The URL at index: " + Integer.toString(i) + " is " + url );
    }
}

public boolean startOfHistory()
{
    WebBackForwardList currentList = this.copyBackForwardList();
    WebHistoryItem item = currentList.getItemAtIndex(0);
    if( item!=null){    // Null-fence in case they haven't called loadUrl yet (CB-2458)
     String url = item.getUrl();
     String currentUrl = this.getUrl();
     LOG.d(TAG, "The current URL is: " + currentUrl);
     LOG.d(TAG, "The URL at item 0 is: " + url);
     return currentUrl.equals(url);
    }
    return false;
}

public WebBackForwardList restoreState(Bundle savedInstanceState)
{
    WebBackForwardList myList = super.restoreState(savedInstanceState);
    Log.d(TAG, "WebView restoration crew now restoring!");
    //Initialize the plugin manager once more
    this.pluginManager.init();
    return myList;
}

public void printBackForwardList() {
    WebBackForwardList currentList = this.copyBackForwardList();
    int currentSize = currentList.getSize();
    for(int i = 0; i < currentSize; ++i)
    {
        WebHistoryItem item = currentList.getItemAtIndex(i);
        String url = item.getUrl();
        LOG.d(TAG, "The URL at index: " + Integer.toString(i) + " is " + url );
    }
}

public boolean startOfHistory()
{
    WebBackForwardList currentList = this.copyBackForwardList();
    WebHistoryItem item = currentList.getItemAtIndex(0);
    if( item!=null){    // Null-fence in case they haven't called loadUrl yet (CB-2458)
     String url = item.getUrl();
     String currentUrl = this.getUrl();
     LOG.d(TAG, "The current URL is: " + currentUrl);
     LOG.d(TAG, "The URL at item 0 is: " + url);
     return currentUrl.equals(url);
    }
    return false;
}

public WebBackForwardList restoreState(Bundle savedInstanceState)
{
    WebBackForwardList myList = super.restoreState(savedInstanceState);
    Log.d(TAG, "WebView restoration crew now restoring!");
    //Initialize the plugin manager once more
    this.pluginManager.init();
    return myList;
}

public void printBackForwardList() {
    WebBackForwardList currentList = this.copyBackForwardList();
    int currentSize = currentList.getSize();
    for(int i = 0; i < currentSize; ++i)
    {
        WebHistoryItem item = currentList.getItemAtIndex(i);
        String url = item.getUrl();
        LOG.d(TAG, "The URL at index: " + Integer.toString(i) + " is " + url );
    }
}

public boolean startOfHistory()
{
    WebBackForwardList currentList = this.copyBackForwardList();
    WebHistoryItem item = currentList.getItemAtIndex(0);
    if( item!=null){    // Null-fence in case they haven't called loadUrl yet (CB-2458)
     String url = item.getUrl();
     String currentUrl = this.getUrl();
     LOG.d(TAG, "The current URL is: " + currentUrl);
     LOG.d(TAG, "The URL at item 0 is: " + url);
     return currentUrl.equals(url);
    }
    return false;
}

public WebBackForwardList restoreState(Bundle savedInstanceState)
{
    WebBackForwardList myList = super.restoreState(savedInstanceState);
    Log.d(TAG, "WebView restoration crew now restoring!");
    //Initialize the plugin manager once more
    this.pluginManager.init();
    return myList;
}

public void printBackForwardList() {
    WebBackForwardList currentList = this.copyBackForwardList();
    int currentSize = currentList.getSize();
    for(int i = 0; i < currentSize; ++i)
    {
        WebHistoryItem item = currentList.getItemAtIndex(i);
        String url = item.getUrl();
        LOG.d(TAG, "The URL at index: " + Integer.toString(i) + " is " + url );
    }
}

public boolean startOfHistory()
{
    WebBackForwardList currentList = this.copyBackForwardList();
    WebHistoryItem item = currentList.getItemAtIndex(0);
    if( item!=null){    // Null-fence in case they haven't called loadUrl yet (CB-2458)
     String url = item.getUrl();
     String currentUrl = this.getUrl();
     LOG.d(TAG, "The current URL is: " + currentUrl);
     LOG.d(TAG, "The URL at item 0 is: " + url);
     return currentUrl.equals(url);
    }
    return false;
}

public WebBackForwardList restoreState(Bundle savedInstanceState)
{
    WebBackForwardList myList = super.restoreState(savedInstanceState);
    Log.d(TAG, "WebView restoration crew now restoring!");
    //Initialize the plugin manager once more
    this.pluginManager.init();
    return myList;
}

public void printBackForwardList() {
    WebBackForwardList currentList = this.copyBackForwardList();
    int currentSize = currentList.getSize();
    for(int i = 0; i < currentSize; ++i)
    {
        WebHistoryItem item = currentList.getItemAtIndex(i);
        String url = item.getUrl();
        LOG.d(TAG, "The URL at index: " + Integer.toString(i) + " is " + url );
    }
}

public boolean startOfHistory()
{
    WebBackForwardList currentList = this.copyBackForwardList();
    WebHistoryItem item = currentList.getItemAtIndex(0);
    if( item!=null){    // Null-fence in case they haven't called loadUrl yet (CB-2458)
     String url = item.getUrl();
     String currentUrl = this.getUrl();
     LOG.d(TAG, "The current URL is: " + currentUrl);
     LOG.d(TAG, "The URL at item 0 is: " + url);
     return currentUrl.equals(url);
    }
    return false;
}