android.webkit.WebView#setScrollBarStyle ( )源码实例Demo

@Nullable
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
                         Bundle savedInstanceState) {
    View root = inflater.inflate(R.layout.help_frag, container, false);

    webView = (WebView) root.findViewById(R.id.webview);

    // Configure related browser settings
    webView.getSettings().setLoadsImagesAutomatically(true);
    webView.getSettings().setJavaScriptEnabled(true);
    webView.getSettings().setUseWideViewPort(true);
    webView.getSettings().setLoadWithOverviewMode(true);
    webView.setScrollBarStyle(View.SCROLLBARS_INSIDE_OVERLAY);
    webView.setWebViewClient(new MyBrowser());

    return root;
}
 

/**
 * Enables the required settings and features for the webview
 *
 * @param webView
 */
private void _makeWebSettings(WebView webView) {
    webView.setInitialScale(1);
    WebSettings webSettings = webView.getSettings();
    // Enable Javascript
    webSettings.setJavaScriptEnabled(true);
    // remove a weird white line on the right size
    webView.setScrollBarStyle(WebView.SCROLLBARS_OUTSIDE_OVERLAY);

    webSettings.setUseWideViewPort(true);
    webSettings.setSupportZoom(true);
    webSettings.setBuiltInZoomControls(true);
    webSettings.setDisplayZoomControls(false);
    webSettings.setLoadWithOverviewMode(true);
    webSettings.setDomStorageEnabled(true); // Required for some NodeJS based code
}
 

private void initWebView()
{
    mWebViewContainer = new RelativeLayout(getContext());
    mWebView = new WebView(getContext());
    mWebView.getSettings().setJavaScriptEnabled(true);
    mWebView.getSettings().setSavePassword(false);
    mWebView.setWebViewClient(new WeiboWebViewClient(null));
    mWebView.requestFocus();
    mWebView.setScrollBarStyle(0);
    mWebView.setVisibility(4);
    NetworkHelper.clearCookies(mContext, mAuthUrl);
    mWebView.loadUrl(mAuthUrl);
    android.widget.RelativeLayout.LayoutParams layoutparams = new android.widget.RelativeLayout.LayoutParams(-1, -1);
    android.widget.RelativeLayout.LayoutParams layoutparams1 = new android.widget.RelativeLayout.LayoutParams(-1, -1);
    DisplayMetrics displaymetrics = getContext().getResources().getDisplayMetrics();
    int i = (int)(10F * displaymetrics.density);
    layoutparams1.setMargins(i, i, i, i);
    Drawable drawable = ResourceManager.getNinePatchDrawable(mContext, 1);
    mWebViewContainer.setBackgroundDrawable(drawable);
    mWebViewContainer.addView(mWebView, layoutparams1);
    mWebViewContainer.setGravity(17);
    int j = 1 + ResourceManager.getDrawable(mContext, 2).getIntrinsicWidth() / 2;
    layoutparams.setMargins(j, (int)(25F * displaymetrics.density), j, j);
    mRootContainer.addView(mWebViewContainer, layoutparams);
}
 

protected void configWebView() {
    mWebView = new WebView(getApplicationContext());
    mWebViewContainer.addView(mWebView, new ViewGroup.LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT, ViewGroup.LayoutParams.MATCH_PARENT));
    WebSettings settings = mWebView.getSettings();
    settings.setJavaScriptEnabled(true);
    settings.setDefaultTextEncodingName("UTF-8");
    settings.setSupportZoom(false);
    settings.setPluginState(WebSettings.PluginState.ON);
    mWebView.setScrollBarStyle(View.SCROLLBARS_INSIDE_OVERLAY);
}
 

protected void configWebView() {
    mWebView = new WebView(getApplicationContext());
    mWebViewContainer.addView(mWebView, new ViewGroup.LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT, ViewGroup.LayoutParams.MATCH_PARENT));
    WebSettings settings = mWebView.getSettings();
    settings.setJavaScriptEnabled(true);
    settings.setDefaultTextEncodingName("UTF-8");
    settings.setSupportZoom(false);
    settings.setPluginState(WebSettings.PluginState.ON);
    mWebView.setScrollBarStyle(View.SCROLLBARS_INSIDE_OVERLAY);
}
 

@SuppressLint("SetJavaScriptEnabled")
public static void setImage(final WebView webView, final File file) {
    fixWebViewTip(webView.getContext());
    
    if (Build.VERSION.SDK_INT <= Build.VERSION_CODES.GINGERBREAD_MR1) {
        webView.setDrawingCacheEnabled(true);
    }
    webView.setBackgroundColor(Color.TRANSPARENT);
    webView.setScrollBarStyle(WebView.SCROLLBARS_OUTSIDE_OVERLAY);
    if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.ECLAIR) {
        CompatibilityImpl.setScrollbarFadingEnabled(webView, true);
    }
    
    WebSettings settings = webView.getSettings();
    settings.setJavaScriptEnabled(true);
    settings.setBuiltInZoomControls(true);
    settings.setSupportZoom(true);
    settings.setAllowFileAccess(true);
    settings.setUseWideViewPort(true);
    settings.setCacheMode(WebSettings.LOAD_NO_CACHE);
    if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.FROYO) {
        CompatibilityImpl.setBlockNetworkLoads(settings, true);
    }
    
    Runnable setup = new Runnable() {
        @Override
        public void run() {
            String html = String.format(TEMPLATE, Uri.fromFile(file).toString());
            webView.loadDataWithBaseURL(null, html, "text/html", "UTF-8", null);
        }
    };
    
    if (webView.getWidth() > 0) {
        setup.run();
    } else {
        webView.loadData("<html></html>", "text/html", "utf-8");
        AppearanceUtils.callWhenLoaded(webView, setup);
    }
}
 

@Override
public void setDefaultAttr(WebView view) {
	// 去除滚动条白色背景，必须在代码里面添加才有效
	view.setScrollBarStyle(View.SCROLLBARS_INSIDE_OVERLAY);
	view.setScrollbarFadingEnabled(true);
	view.setDrawingCacheEnabled(true);
	view.setLongClickable(true);
	view.setBackgroundResource(android.R.color.transparent);
	view.setBackgroundColor(Color.TRANSPARENT);
	view.getBackground().setAlpha(0);
	view.setFocusable(true);
	view.setFocusableInTouchMode(true);
}
 

private static WebView setAboutText(Context context, WebView wv) {
    final WebSettings settings = wv.getSettings();

    // Fix for "Wrong charset in serbian translations" https://github.com/k3b/LocationMapViewer/issues/5
    // (for android 2.2) see http://stackoverflow.com/questions/4933069/android-webview-with-garbled-utf-8-characters
    settings.setDefaultTextEncodingName("utf-8");
    settings.setBuiltInZoomControls(true);

    String html = context.getResources().getString(R.string.about_content); // "<html><body>some <b>html</b> here</body></html>";

    final String versionName = GuiUtil.getAppVersionName(context);
    if (versionName != null) {
        html = html.replace("$versionName$", versionName);
    }

    html = html.replace("$translate$",
            context.getText(R.string.about_translate));
    html = html.replace("$about$",
            context.getText(R.string.about_content_about));

    // Fix for "Wrong charset in serbian translations" https://github.com/k3b/LocationMapViewer/issues/5
    // (for android 4.x) see http://stackoverflow.com/questions/4933069/android-webview-with-garbled-utf-8-characters
    wv.loadData(html, "text/html; charset=utf-8", "UTF-8");
    wv.setVerticalScrollBarEnabled(true);

    wv.setScrollBarStyle(View.SCROLLBARS_OUTSIDE_OVERLAY);
    wv.setScrollbarFadingEnabled(false);
    return wv;
}