Example usage for android.webkit WebView canGoBack

List of usage examples for android.webkit WebView canGoBack

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  2. Java
  3. android
  4. android.webkit.*
  5. WebView
  6. canGoBack

Introduction

In this page you can find the example usage for android.webkit WebView canGoBack.

Prototype

public boolean canGoBack()

Source Link

Document

Gets whether this WebView has a back history item.

Usage

From source file:de.baumann.browser.helper.helper_webView.java

private static void webView_Touch(final Activity from, final WebView webView) {

    webView.setOnTouchListener(new class_OnSwipeTouchListener_webview(from) {
        public void onSwipeRight() {
            if (webView.canGoBack()) {
                webView.goBack();// w w w.j av  a 2  s.c o m
            } else {
                Snackbar.make(webView, R.string.toast_back, Snackbar.LENGTH_SHORT).show();
            }
        }

        public void onSwipeLeft() {
            if (webView.canGoForward()) {
                webView.goForward();
            } else {
                Snackbar.make(webView, R.string.toast_forward, Snackbar.LENGTH_SHORT).show();
            }
        }
    });
}

From source file:com.macleod2486.utnow.MainActivity.java

public void back(View view) {
    WebView utdirect = (WebView) findViewById(R.id.webView);
    if (utdirect.canGoBack())
        utdirect.goBack();/*from   w  w w  . j a va 2 s .c om*/
}

From source file:com.wordpress.jftreading.BaseFragmentWebView.java

@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
    fragmentView = inflater.inflate(R.layout.webview_fragment, container, false);
    browser = (WebView) fragmentView.findViewById(R.id.webkit);
    browser.getSettings().setJavaScriptEnabled(true);
    browser.setWebViewClient(new WebViewClient() {
        @Override//w w  w .j a v  a  2s  .c o  m
        public boolean shouldOverrideUrlLoading(WebView view, String url) {
            if (!networkIsUp() && !offlinePage) {
                view.loadUrl(getErrorPage());
                return true;
            }
            if (url.startsWith("http:") || url.startsWith("https:") || url.startsWith("file:")) {
                return false;
            }
            Intent intent = new Intent(Intent.ACTION_VIEW, Uri.parse(url));
            startActivity(intent);
            return true;
        }
    });
    browser.setWebChromeClient(new WebChromeClient() {
        @Override
        public boolean onJsConfirm(WebView view, String url, String message, JsResult result) {
            return super.onJsConfirm(view, url, message, result);
        }
    });
    browser.setOnKeyListener(new OnKeyListener() {

        @Override
        public boolean onKey(View v, int keyCode, KeyEvent event) {
            if (event.getAction() == KeyEvent.ACTION_DOWN) {
                WebView webView = (WebView) v;

                switch (keyCode) {
                case KeyEvent.KEYCODE_BACK:
                    if (webView.canGoBack()) {
                        webView.goBack();
                        return true;
                    }
                    break;
                }
            }
            return false;
        }
    });
    browser.setDownloadListener(new DownloadListener() {

        @Override
        public void onDownloadStart(String url, String userAgent, String contentDisposition, String mimetype,
                long contentLength) {
            Uri uri = Uri.parse(url);
            Intent intent = new Intent(Intent.ACTION_VIEW, uri);
            startActivity(intent);
        }
    });
    browser.addJavascriptInterface(new MyJavascriptInterface(), "Android");
    browser.loadUrl(linkSelector());
    return fragmentView;
}

From source file:com.inha.stickyonpage.MainActivity.java

@Override
public boolean onKeyDown(int keyCode, KeyEvent event) {
    if (keyCode == KeyEvent.KEYCODE_BACK) {
        if (getSupportFragmentManager().findFragmentByTag("BrowsingWebView") != null) {
            if (mDrawerLayout.isDrawerOpen(Gravity.RIGHT) || mDrawerLayout.isDrawerOpen(Gravity.LEFT)) {
                mDrawerLayout.closeDrawer(Gravity.RIGHT);
                mDrawerLayout.closeDrawer(Gravity.LEFT);
                return false;
            } else {
                WebView mWebView = (WebView) findViewById(R.id.webView1);
                if (mWebView.canGoBack()) {
                    mWebView.goBack();//from w  w w .j av a2s. co  m
                } else {
                    ActionBar mActionBar = getActionBar();
                    mActionBar.setCustomView(null);
                    mActionBar.setDisplayOptions(ActionBar.DISPLAY_SHOW_HOME);
                    FragmentTransaction ft = getSupportFragmentManager().beginTransaction();
                    RecentStickyView stickyFragment = new RecentStickyView();
                    ft.replace(R.id.drawer_main, stickyFragment, "RecentStickyView");
                    ft.commit();
                }
                return false;
            }
        } else if (getSupportFragmentManager().getBackStackEntryCount() == 0) {
            if (!mFlag) {
                Toast.makeText(this, "''?  ?  ?.",
                        Toast.LENGTH_SHORT).show();
                mFlag = true;
                mHandler.sendEmptyMessageDelayed(0, 2000);
                return false;
            } else {
                finish();
            }
        }
    }
    return super.onKeyDown(keyCode, event);
}

From source file:com.tfc.webviewer.presenter.WebViewPresenterImpl.java

@Override
public void onBackPressed(PopupWindow menu, WebView webView) {
    if (menu.isShowing()) {
        mView.closeMenu();/*from   w  ww. j av  a2  s.  com*/
    } else if (webView.canGoBack()) {
        mView.goBack();
    } else {
        mView.close();
    }
}

From source file:com.tomeokin.lspush.biz.home.CollectionWebViewActivity.java

@Override
protected void onPrepareWebView(WebView webView) {
    super.onPrepareWebView(webView);
    webView.setWebViewClient(new WebViewClient() {
        @Override/*w  w w.  j a v  a2s . co m*/
        public boolean shouldOverrideUrlLoading(WebView view, WebResourceRequest request) {
            return false; // let the web view handle the url
        }

        @Override
        public void onPageFinished(WebView view, String url) {
            boolean canGoBack = view.canGoBack();
            mBottomBar.backButton.setEnabled(canGoBack);
            mBottomBar.backButton
                    .setImageResource(canGoBack ? R.drawable.ic_action_back_deep : R.drawable.ic_action_back);

            boolean canGoForward = view.canGoForward();
            mBottomBar.forwardButton.setEnabled(canGoForward);
            mBottomBar.forwardButton.setImageResource(
                    canGoForward ? R.drawable.ic_action_forward_deep : R.drawable.ic_action_forward);
        }
    });
}

From source file:com.cliff.comichelper.MainActivity.java

@Override
public void onBackPressed() {
    WebView webView = currentFragment.getWebView();
    if (webView.canGoBack())
        webView.goBack();//from w  w w. j  av a  2s  . c  o  m
    else
        super.onBackPressed();
}

From source file:org.apache.cordova.AndroidWebViewClient.java

/**
 * Report an error to the host application. These errors are unrecoverable (i.e. the main resource is unavailable).
 * The errorCode parameter corresponds to one of the ERROR_* constants.
 *
 * @param view          The WebView that is initiating the callback.
 * @param errorCode     The error code corresponding to an ERROR_* value.
 * @param description   A String describing the error.
 * @param failingUrl    The url that failed to load.
 *///ww w.j av  a  2 s .co  m
@Override
public void onReceivedError(WebView view, int errorCode, String description, String failingUrl) {
    // Ignore error due to stopLoading().
    if (!isCurrentlyLoading) {
        return;
    }
    LOG.d(TAG, "CordovaWebViewClient.onReceivedError: Error code=%s Description=%s URL=%s", errorCode,
            description, failingUrl);

    // Clear timeout flag
    appView.loadUrlTimeout++;

    // If this is a "Protocol Not Supported" error, then revert to the previous
    // page. If there was no previous page, then punt. The application's config
    // is likely incorrect (start page set to sms: or something like that)
    if (errorCode == WebViewClient.ERROR_UNSUPPORTED_SCHEME) {
        if (view.canGoBack()) {
            view.goBack();
            return;
        } else {
            super.onReceivedError(view, errorCode, description, failingUrl);
        }
    }

    // Handle other errors by passing them to the webview in JS
    JSONObject data = new JSONObject();
    try {
        data.put("errorCode", errorCode);
        data.put("description", description);
        data.put("url", failingUrl);
    } catch (JSONException e) {
        e.printStackTrace();
    }
    this.appView.getPluginManager().postMessage("onReceivedError", data);
}

From source file:org.apache.cordova.CordovaWebViewClient.java

/**
 * Report an error to the host application. These errors are unrecoverable (i.e. the main resource is unavailable).
 * The errorCode parameter corresponds to one of the ERROR_* constants.
 *
 * @param view          The WebView that is initiating the callback.
 * @param errorCode     The error code corresponding to an ERROR_* value.
 * @param description   A String describing the error.
 * @param failingUrl    The url that failed to load.
 *//*from  w w w.  j  av a 2 s  .  co m*/
@Override
public void onReceivedError(WebView view, int errorCode, String description, String failingUrl) {
    // Ignore error due to stopLoading().
    if (!isCurrentlyLoading) {
        return;
    }
    LOG.d(TAG, "CordovaWebViewClient.onReceivedError: Error code=%s Description=%s URL=%s", errorCode,
            description, failingUrl);

    // Clear timeout flag
    this.appView.loadUrlTimeout++;

    // If this is a "Protocol Not Supported" error, then revert to the previous
    // page. If there was no previous page, then punt. The application's config
    // is likely incorrect (start page set to sms: or something like that)
    if (errorCode == WebViewClient.ERROR_UNSUPPORTED_SCHEME) {
        if (view.canGoBack()) {
            view.goBack();
            return;
        } else {
            super.onReceivedError(view, errorCode, description, failingUrl);
        }
    }

    // Handle other errors by passing them to the webview in JS
    JSONObject data = new JSONObject();
    try {
        data.put("errorCode", errorCode);
        data.put("description", description);
        data.put("url", failingUrl);
    } catch (JSONException e) {
        e.printStackTrace();
    }
    this.appView.postMessage("onReceivedError", data);
}

From source file:com.stoutner.privacybrowser.MainWebViewActivity.java

@Override
public void onBackPressed() {
    final WebView mainWebView = (WebView) findViewById(R.id.mainWebView);

    // Close the navigation drawer if it is available.  GravityCompat.START is the drawer on the left on Left-to-Right layout text.
    if (drawerLayout.isDrawerVisible(GravityCompat.START)) {
        drawerLayout.closeDrawer(GravityCompat.START);
    } else {/*  ww w . ja v a2  s  .c o  m*/
        // Load the previous URL if available.
        assert mainWebView != null; //This assert removes the incorrect warning on the following line that mainWebView might be null.
        if (mainWebView.canGoBack()) {
            mainWebView.goBack();
        } else {
            // Pass onBackPressed to the system.
            super.onBackPressed();
        }
    }
}