Example usage for android.webkit WebView copyBackForwardList

Introduction

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

Prototype

public WebBackForwardList copyBackForwardList() 

Source Link

Document

Gets the WebBackForwardList for this WebView.

Usage

From source file:android.webkit.cts.WebViewTest.java

@UiThreadTest
public void testSaveAndRestoreState() throws Throwable {
    if (!NullWebViewUtils.isWebViewAvailable()) {
        return;/*from  w  ww  .java  2 s.  c  o  m*/
    }
    // nothing to save
    assertNull(mWebView.saveState(new Bundle()));

    startWebServer(false);
    String url1 = mWebServer.getAssetUrl(TestHtmlConstants.HTML_URL1);
    String url2 = mWebServer.getAssetUrl(TestHtmlConstants.HTML_URL2);
    String url3 = mWebServer.getAssetUrl(TestHtmlConstants.HTML_URL3);

    // make a history list
    mOnUiThread.loadUrlAndWaitForCompletion(url1);
    pollingCheckWebBackForwardList(url1, 0, 1);
    mOnUiThread.loadUrlAndWaitForCompletion(url2);
    pollingCheckWebBackForwardList(url2, 1, 2);
    mOnUiThread.loadUrlAndWaitForCompletion(url3);
    pollingCheckWebBackForwardList(url3, 2, 3);

    // save the list
    Bundle bundle = new Bundle();
    WebBackForwardList saveList = mWebView.saveState(bundle);
    assertNotNull(saveList);
    assertEquals(3, saveList.getSize());
    assertEquals(2, saveList.getCurrentIndex());
    assertEquals(url1, saveList.getItemAtIndex(0).getUrl());
    assertEquals(url2, saveList.getItemAtIndex(1).getUrl());
    assertEquals(url3, saveList.getItemAtIndex(2).getUrl());

    // change the content to a new "blank" web view without history
    final WebView newWebView = new WebView(getActivity());

    WebBackForwardList copyListBeforeRestore = newWebView.copyBackForwardList();
    assertNotNull(copyListBeforeRestore);
    assertEquals(0, copyListBeforeRestore.getSize());

    // restore the list
    final WebBackForwardList restoreList = newWebView.restoreState(bundle);
    assertNotNull(restoreList);
    assertEquals(3, restoreList.getSize());
    assertEquals(2, saveList.getCurrentIndex());

    // wait for the list items to get inflated
    new PollingCheck(TEST_TIMEOUT) {
        @Override
        protected boolean check() {
            return restoreList.getItemAtIndex(0).getUrl() != null
                    && restoreList.getItemAtIndex(1).getUrl() != null
                    && restoreList.getItemAtIndex(2).getUrl() != null;
        }
    }.run();
    assertEquals(url1, restoreList.getItemAtIndex(0).getUrl());
    assertEquals(url2, restoreList.getItemAtIndex(1).getUrl());
    assertEquals(url3, restoreList.getItemAtIndex(2).getUrl());

    WebBackForwardList copyListAfterRestore = newWebView.copyBackForwardList();
    assertNotNull(copyListAfterRestore);
    assertEquals(3, copyListAfterRestore.getSize());
    assertEquals(2, copyListAfterRestore.getCurrentIndex());
    assertEquals(url1, copyListAfterRestore.getItemAtIndex(0).getUrl());
    assertEquals(url2, copyListAfterRestore.getItemAtIndex(1).getUrl());
    assertEquals(url3, copyListAfterRestore.getItemAtIndex(2).getUrl());
}

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