VideoEnabledWebView

package tagalog.moviex;

import android.annotation.*;
import android.content.*;
import android.os.*;
import android.util.*;
import android.webkit.*;
import android.widget.*;
import java.util.*;

/**
 * This class serves as a WebView to be used in conjunction with a VideoEnabledWebChromeClient.
 * It makes possible:
 * - To detect the HTML5 video ended event so that the VideoEnabledWebChromeClient can exit full-screen.
 *
 * Important notes:
 * - Javascript is enabled by default and must not be disabled with getSettings().setJavaScriptEnabled(false).
 * - setWebChromeClient() must be called before any loadData(), loadDataWithBaseURL() or loadUrl() method.
 *
 * @author Cristian Perez (http://cpr.name)
 *
 */
public class VideoEnabledWebView extends WebView
{

    public class JavascriptInterface
    {
        @android.webkit.JavascriptInterface
        public void notifyVideoEnd() // Must match Javascript interface method of VideoEnabledWebChromeClient
        {
            // This code is not executed in the UI thread, so we must force that to happen
            new Handler(Looper.getMainLooper()).post(new Runnable()
				{
					@Override
					public void run()
					{
						if (videoEnabledWebChromeClient != null)
						{
							videoEnabledWebChromeClient.onHideCustomView();
						}
					}
				});
        }
    }

    private VideoEnabledWebChromeClient videoEnabledWebChromeClient;
    private boolean addedJavascriptInterface;

    public VideoEnabledWebView(Context context)
    {
        super(context);
        addedJavascriptInterface = false;
    }

    @SuppressWarnings("unused")
    public VideoEnabledWebView(Context context, AttributeSet attrs)
    {
        super(context, attrs);
        addedJavascriptInterface = false;
    }

    @SuppressWarnings("unused")
    public VideoEnabledWebView(Context context, AttributeSet attrs, int defStyle)
    {
        super(context, attrs, defStyle);
        addedJavascriptInterface = false;
    }

    /**
     * Indicates if the video is being displayed using a custom view (typically full-screen)
     * @return true it the video is being displayed using a custom view (typically full-screen)
     */
    public boolean isVideoFullscreen()
    {
        return videoEnabledWebChromeClient != null && videoEnabledWebChromeClient.isVideoFullscreen();
    }

    /**
     * Pass only a VideoEnabledWebChromeClient instance.
     */
    @Override @SuppressLint("SetJavaScriptEnabled")
    public void setWebChromeClient(WebChromeClient client)
    {
        getSettings().setJavaScriptEnabled(true);

        if (client instanceof VideoEnabledWebChromeClient)
        {
            this.videoEnabledWebChromeClient = (VideoEnabledWebChromeClient) client;
        }

        super.setWebChromeClient(client);
    }

    @Override
    public void loadData(String data, String mimeType, String encoding)
    {
        addJavascriptInterface();
        super.loadData(data, mimeType, encoding);
    }

    @Override
    public void loadDataWithBaseURL(String baseUrl, String data, String mimeType, String encoding, String historyUrl)
    {
        addJavascriptInterface();
        super.loadDataWithBaseURL(baseUrl, data, mimeType, encoding, historyUrl);
    }

    @Override
    public void loadUrl(String url)
    {
        addJavascriptInterface();
        super.loadUrl(url);

    }


    @Override
    public void loadUrl(String url, Map<String, String> additionalHttpHeaders)
    {
        addJavascriptInterface();
        super.loadUrl(url, additionalHttpHeaders);
    }

    private void addJavascriptInterface()
    {
        if (!addedJavascriptInterface)
        {
            // Add javascript interface to be called when the video ends (must be done before page load)
            addJavascriptInterface(new JavascriptInterface(), "_VideoEnabledWebView"); // Must match Javascript interface name of VideoEnabledWebChromeClient

            addedJavascriptInterface = true;
        }
    }

}