de.zell.android.util.fragments.WebviewFragment.java Source code

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Here is the source code for de.zell.android.util.fragments.WebviewFragment.java

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/*
 * Copyright 2014 Quality and Usability Lab, Telekom Innvation Laboratories, TU Berlin..
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package de.zell.android.util.fragments;

import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.webkit.WebChromeClient;
import android.webkit.WebSettings;
import android.webkit.WebView;
import android.webkit.WebViewClient;
import android.widget.ProgressBar;
import de.zell.android.util.R;
import de.zell.android.util.activities.MainNavigationActivity;
import de.zell.android.util.activities.ViewFragmentBroadcaster;

/**
 * Represents the Fragment for the web view.
 * 
 * @author Christopher Zell <zelldon91@googlemail.com>
 */
public class WebviewFragment extends Fragment implements Nameable {

    /**
     * The argument key for the url.
     */
    public static final String ARG_WEBVIEW_FRAGMENT_URL = "webviewFragmentUrl";

    /**
     * The argument key for the view title.
     */
    public static final String ARG_WEBVIEW_FRAGMENT_TITLE = "webviewFragmentTitle";

    /**
     * The tag for the url.
     */
    private static final String TAG_WEBVIEW_URL = "webViewUrl";

    /**
     * The tag for the view title.
     */
    private static final String TAG_WEBVIEW_TITLE = "webViewTitle";

    /**
     * The url which should be loaded.
     */
    private String url;

    /**
     * The title of the fragment.
     */
    private String title;

    /**
     * The view which shows the webpage.
     */
    private WebView content;

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);

        if (null == savedInstanceState) {
            savedInstanceState = getArguments();
        }

        if (null != savedInstanceState) {
            url = savedInstanceState.getString(TAG_WEBVIEW_URL);
            title = savedInstanceState.getString(TAG_WEBVIEW_TITLE);
            if (null == url) {
                url = savedInstanceState.getString(ARG_WEBVIEW_FRAGMENT_URL);
                title = savedInstanceState.getString(ARG_WEBVIEW_FRAGMENT_TITLE);
            }
        }
    }

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
        View rootView = inflater.inflate(R.layout.fragment_webview, container, false);
        if (url != null && !url.isEmpty()) {
            content = ((WebView) rootView.findViewById(R.id.webview));
            //WebViewClient is enabled in order to force all links to load within the webview and also
            // in order to enable JavaScript
            content.setWebViewClient(new HelloWebViewClient());
            WebSettings webSettings = content.getSettings();
            webSettings.setJavaScriptEnabled(true);
            webSettings.setBuiltInZoomControls(true);
            webSettings.setSupportZoom(true);

            final ProgressBar progressBar = ((MainNavigationActivity) getActivity()).getProgressBar();
            content.setWebChromeClient(new WebChromeClient() {
                @Override
                public void onProgressChanged(WebView view, int newProgress) {
                    progressBar.setProgress(newProgress);
                    if (newProgress == 100)
                        progressBar.setVisibility(View.GONE);
                }
            });

            progressBar.setIndeterminate(true);
            progressBar.setVisibility(View.VISIBLE);
            content.loadUrl(url);
        }

        getActivity().setTitle(title);
        return rootView;
    }

    @Override
    public void onSaveInstanceState(Bundle outState) {
        super.onSaveInstanceState(outState);
        outState.putString(TAG_WEBVIEW_URL, url);
        outState.putString(TAG_WEBVIEW_TITLE, title);
    }

    @Override
    public void onPause() {
        super.onPause();
        ViewFragmentBroadcaster.boradcastHideFragment(getActivity());
    }

    public String getName() {
        return WebviewFragment.class.getName();
    }

    @Override
    public void onResume() {
        super.onResume();
        ViewFragmentBroadcaster.broadcstViewFragment(getActivity(), getName());
    }

    @Override
    public void onDestroy() {
        super.onDestroy();
    }

    //Webviewclient is only so the URL loaded is always loaded and the picker is never shown (for google maps f.e.)
    public class HelloWebViewClient extends WebViewClient {

        public HelloWebViewClient() {
            // do nothing
        }

        @Override
        public boolean shouldOverrideUrlLoading(WebView view, String url) {
            view.loadUrl(url);
            return true;
        }

        @Override
        public void onPageFinished(WebView view, String url) {
            // TODO Auto-generated method stub
            super.onPageFinished(view, url);
        }
    }
}