Java WebView类代码示例

import android.webkit.WebView; //导入依赖的package包/类
public void onPageFinished(WebView view, String url) {
    super.onPageFinished(view, url);

    // CB-10395 InAppBrowser's WebView not storing cookies reliable to local device storage
    if (android.os.Build.VERSION.SDK_INT >= android.os.Build.VERSION_CODES.LOLLIPOP) {
        CookieManager.getInstance().flush();
    } else {
        CookieSyncManager.getInstance().sync();
    }

    // https://issues.apache.org/jira/browse/CB-11248
    view.clearFocus();
    view.requestFocus();

    try {
        JSONObject obj = new JSONObject();
        obj.put("type", LOAD_STOP_EVENT);
        obj.put("url", url);

        sendUpdate(obj, true);
    } catch (JSONException ex) {
        LOG.d(LOG_TAG, "Should never happen");
    }
}
 

import android.webkit.WebView; //导入依赖的package包/类
@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);

    webView = (WebView) findViewById(R.id.webview);
    String url = "file:///android_asset/sample.html";

    webView.getSettings().setJavaScriptEnabled(true);

    webChromeClient = new FileChooserWebChromeClient();
    webView.setWebChromeClient(webChromeClient);
    webView.loadUrl(url);

    WebView.setWebContentsDebuggingEnabled(true);

}
 

import android.webkit.WebView; //导入依赖的package包/类
private View findScrollableViewInternal(View content, boolean selfable) {
    View scrollableView = null;
    Queue<View> views = new LinkedBlockingQueue<>(Collections.singletonList(content));
    while (!views.isEmpty() && scrollableView == null) {
        View view = views.poll();
        if (view != null) {
            if ((selfable || view != content) && (view instanceof AbsListView
                    || view instanceof ScrollView
                    || view instanceof ScrollingView
                    || view instanceof NestedScrollingChild
                    || view instanceof NestedScrollingParent
                    || view instanceof WebView
                    || view instanceof ViewPager)) {
                scrollableView = view;
            } else if (view instanceof ViewGroup) {
                ViewGroup group = (ViewGroup) view;
                for (int j = 0; j < group.getChildCount(); j++) {
                    views.add(group.getChildAt(j));
                }
            }
        }
    }
    return scrollableView;
}
 

import android.webkit.WebView; //导入依赖的package包/类
private void init(){
    LinearLayout layout = (LinearLayout) findViewById(R.id.Download_layout);
    layout.setVisibility(View.GONE);

    Intent intent = getIntent();
    body = intent.getStringExtra("body");
    title = intent.getStringExtra("title");
    contentView = (WebView) findViewById(R.id.content_webview);
    contentView.setHorizontalScrollBarEnabled(false);//水平不显示
    contentView.setVerticalScrollBarEnabled(false); //垂直不显示

    contentView.setOnTouchListener(new View.OnTouchListener() {
        @Override
        public boolean onTouch(View v, MotionEvent event) {
            return (event.getAction() == MotionEvent.ACTION_MOVE);
        }
    });
    contentView.setWebViewClient(new WebViewClient());

    topImage = (ImageView) findViewById(R.id.top_image);
    topTitle = (TextView) findViewById(R.id.top_titlt);
    topSource = (TextView) findViewById(R.id.top_source);
}
 

import android.webkit.WebView; //导入依赖的package包/类
/**
 * Give the host application a chance to take over the control when a new url
 * is about to be loaded in the current WebView.
 *
 * @param view          The WebView that is initiating the callback.
 * @param url           The url to be loaded.
 * @return              true to override, false for default behavior
 */
@TargetApi(Build.VERSION_CODES.ICE_CREAM_SANDWICH_MR1)
boolean shouldOverrideUrlLoading(WebView view, String url) {
    // Give plugins the chance to handle the url
    if (this.appView.pluginManager.onOverrideUrlLoading(url)) {
        // Do nothing other than what the plugins wanted.
        // If any returned true, then the request was handled.
        return true;
    }
    else if(url.startsWith("file://") | url.startsWith("data:"))
    {
        //This directory on WebKit/Blink based webviews contains SQLite databases!
        //DON'T CHANGE THIS UNLESS YOU KNOW WHAT YOU'RE DOING!
        return url.contains("app_webview");
    }
    else if (appView.getWhitelist().isUrlWhiteListed(url)) {
        // Allow internal navigation
        return false;
    }
    else if (appView.getExternalWhitelist().isUrlWhiteListed(url))
    {
        try {
            Intent intent = new Intent(Intent.ACTION_VIEW);
            intent.setData(Uri.parse(url));
            intent.addCategory(Intent.CATEGORY_BROWSABLE);
            intent.setComponent(null);
            if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.ICE_CREAM_SANDWICH_MR1) {
                intent.setSelector(null);
            }
            this.cordova.getActivity().startActivity(intent);
            return true;
        } catch (android.content.ActivityNotFoundException e) {
            LOG.e(TAG, "Error loading url " + url, e);
        }
    }
    // Intercept the request and do nothing with it -- block it
    return true;
}
 

import android.webkit.WebView; //导入依赖的package包/类
@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_story_webview);
    Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
    setSupportActionBar(toolbar);

    final Item item = (Item) getIntent().getSerializableExtra("item");

    WebView webView = new WebView(this);
    webView.getSettings().setJavaScriptEnabled(true);
    webView.setWebViewClient(new WebViewClient() {
        @Override
        public boolean shouldOverrideUrlLoading(WebView view, String url) {
            view.loadUrl(url);
            return true;
        }
    });
    setContentView(webView);
    webView.loadUrl(item.getUrl());
}
 

import android.webkit.WebView; //导入依赖的package包/类
/**
 * 获取框架api类中所有符合要求的api
 *
 * @param injectedCls
 * @return
 * @throws Exception
 */
private static HashMap<String, Method> getAllMethod(Class injectedCls) throws Exception {
    HashMap<String, Method> mMethodsMap = new HashMap<>();
    Method[] methods = injectedCls.getDeclaredMethods();
    for (Method method : methods) {
        String name;
        if (method.getModifiers() != (Modifier.PUBLIC | Modifier.STATIC) || (name = method.getName()) == null) {
            continue;
        }
        Class[] parameters = method.getParameterTypes();
        if (null != parameters && parameters.length == 4) {
            if (parameters[1] == WebView.class && parameters[2] == JSONObject.class && parameters[3] == Callback.class) {
                mMethodsMap.put(name, method);
            }
        }
    }
    return mMethodsMap;
}
 

import android.webkit.WebView; //导入依赖的package包/类
/**
 * Notify the host application that a page has started loading.
 * This method is called once for each main frame load so a page with iframes or framesets will call onPageStarted
 * one time for the main frame. This also means that onPageStarted will not be called when the contents of an
 * embedded frame changes, i.e. clicking a link whose target is an iframe.
 *
 * @param view          The webview initiating the callback.
 * @param url           The url of the page.
 */
@Override
public void onPageStarted(WebView view, String url, Bitmap favicon) {
    super.onPageStarted(view, url, favicon);
    isCurrentlyLoading = true;
    LOG.d(TAG, "onPageStarted(" + url + ")");
    // Flush stale messages.
    this.appView.bridge.reset(url);

    // Broadcast message that page has loaded
    this.appView.postMessage("onPageStarted", url);

    // Notify all plugins of the navigation, so they can clean up if necessary.
    if (this.appView.pluginManager != null) {
        this.appView.pluginManager.onReset();
    }
}
 

import android.webkit.WebView; //导入依赖的package包/类
public static void flingCompat(View view, int velocityY) {
    if (view instanceof ScrollView) {
        ((ScrollView) view).fling(velocityY);
    } else if (view instanceof WebView) {
        ((WebView) view).flingScroll(0, velocityY);
    } else if (view instanceof RecyclerView) {
        ((RecyclerView) view).fling(0, velocityY);
    } else if (view instanceof NestedScrollView) {
        ((NestedScrollView) view).fling(velocityY);
    } else if (view instanceof AbsListView) {
        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
            ((AbsListView) view).fling(velocityY);
        } else {
            SRReflectUtil.compatOlderAbsListViewFling((AbsListView) view, velocityY);
        }
    }
}
 

import android.webkit.WebView; //导入依赖的package包/类
private void fetchArticleBody() {
    setBusy(true);
    AnnouncementModels.fetchArticleBody(articleID, new ModelListener<String>() {
        @Override
        public void onData(String result, String message) {
            setBusy(false);
            if (result == null) {
                Toast.makeText(getApplicationContext(), message, Toast.LENGTH_SHORT).show();
            } else {
                WebView wb = (WebView) findViewById(R.id.webViewforArticle);
                wb.loadData(result, "text/html;charset=utf-8", null);
                wb.getSettings().setLoadWithOverviewMode(true);
                wb.getSettings().setUseWideViewPort(true);
            }
        }
    });
}
 

import android.webkit.WebView; //导入依赖的package包/类
private void initWebView() {
    mContentWebView.getSettings().setUseWideViewPort(false);
    mContentWebView.getSettings().setLoadWithOverviewMode(true);
    mContentWebView.getSettings().setPluginState(WebSettings.PluginState.ON);
    mContentWebView.setWebChromeClient(new WebChromeClient());
    mContentWebView.setWebViewClient(new WebViewClient() {
        @Override
        public boolean shouldOverrideUrlLoading(WebView view, String url) {
            FragmentFactory.PageType pageType = FragmentFactory.getPageTypeByUrl(url);
            if (mListener != null && pageType == FragmentFactory.PageType.VIEW_IMAGE) {
                mListener.openPage(url, getString(R.string.view_image));
                return true;
            }

            startActivity(new Intent(Intent.ACTION_VIEW, Uri.parse(url)));
            return true;
        }
    });
    mContentWebView.getSettings().setJavaScriptEnabled(true);
}
 

import android.webkit.WebView; //导入依赖的package包/类
/**
 * On received client cert request.
 * The method forwards the request to any running plugins before using the default implementation.
 *
 * @param view
 * @param request
 */
@Override
@TargetApi(21)
public void onReceivedClientCertRequest (WebView view, ClientCertRequest request)
{

    // Check if there is some plugin which can resolve this certificate request
    PluginManager pluginManager = this.parentEngine.pluginManager;
    if (pluginManager != null && pluginManager.onReceivedClientCertRequest(null, new CordovaClientCertRequest(request))) {
        parentEngine.client.clearLoadTimeoutTimer();
        return;
    }

    // By default pass to WebViewClient
    super.onReceivedClientCertRequest(view, request);
}
 

import android.webkit.WebView; //导入依赖的package包/类
@Override
public Dialog onCreateDialog(Bundle savedInstanceState) {
    WebView webView = new WebView(getActivity());
    webView.loadUrl("file:///android_asset/licenses.html");

    return new AlertDialog.Builder(getActivity())
            .setTitle(R.string.about_licenses)
            .setView(webView)
            .setPositiveButton(R.string.ok,
                    new DialogInterface.OnClickListener() {
                        public void onClick(DialogInterface dialog, int whichButton) {
                            dialog.dismiss();
                        }
                    }
            )
            .create();
}
 

import android.webkit.WebView; //导入依赖的package包/类
@Override
public boolean onJsPrompt(WebView view, String url, String message, String defaultValue, JsPromptResult result) {
    Log.i(TAG,"onJsPrompt:"+url+"  message:"+message+"  d:"+defaultValue+"  ");
    if (mJsCallJavas != null && JsCallJava.isSafeWebViewCallMsg(message)) {
        JSONObject jsonObject = JsCallJava.getMsgJSONObject(message);
        String interfacedName = JsCallJava.getInterfacedName(jsonObject);
        if (interfacedName != null) {
            JsCallJava jsCallJava = mJsCallJavas.get(interfacedName);
            if (jsCallJava != null) {
                result.confirm(jsCallJava.call(view, jsonObject));
            }
        }
        return true;
    } else {
        return false;
    }

}
 

import android.webkit.WebView; //导入依赖的package包/类
/**
 * Called when the activity is first created. Set the web view layout and
 * get the title and file to be displayed.
 * 
 * @param savedInstanceState
 *            Is used to save the state of the created Activity.
 * 
 * @author Yuriy Stanchev
 * 
 * @email [email protected]
 * 
 * @date 11 Mar 2012
 */
@Override
public void onCreate(Bundle savedInstanceState) {
	super.onCreate(savedInstanceState);

	Intent intent = getIntent();
	Bundle extras = intent.getExtras();

	String title = (String) extras.get("title");
	String file = (String) extras.get("file");

	setContentView(R.layout.about);

	setTitle(title);

	WebView view = (WebView) findViewById(R.id.web);

	view.setFocusable(true);
	view.setFocusableInTouchMode(true);
	view.requestFocus();
	view.setScrollBarStyle(View.SCROLLBARS_INSIDE_OVERLAY);
	view.loadUrl(file);

}