MainActivity.java

package fullscreenvideosample.android.chrome.google.com.fullscreenvideosample;

import android.annotation.TargetApi;
import android.app.Activity;

import android.app.ActionBar;
import android.app.Fragment;
import android.app.FragmentManager;
import android.content.Context;
import android.content.pm.ActivityInfo;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.os.Build;
import android.os.Bundle;
import android.os.Handler;
import android.view.LayoutInflater;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.view.ViewGroup;
import android.support.v4.widget.DrawerLayout;
import android.webkit.WebChromeClient;
import android.webkit.WebSettings;
import android.webkit.WebView;
import android.webkit.WebViewClient;
import android.widget.FrameLayout;


public class MainActivity extends Activity
        implements NavigationDrawerFragment.NavigationDrawerCallbacks {

    private static final String TAG = MainActivity.class.getSimpleName();

    /**
     * Fragment managing the behaviors, interactions and presentation of the navigation drawer.
     */
    private NavigationDrawerFragment mNavigationDrawerFragment;

    /**
     * Used to store the last screen title. For use in {@link #restoreActionBar()}.
     */
    private CharSequence mTitle;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        mNavigationDrawerFragment = (NavigationDrawerFragment)
                getFragmentManager().findFragmentById(R.id.navigation_drawer);
        mTitle = getTitle();

        // Set up the drawer.
        mNavigationDrawerFragment.setUp(
                R.id.navigation_drawer,
                (DrawerLayout) findViewById(R.id.drawer_layout));
    }

    @Override
    public void onNavigationDrawerItemSelected(int position) {
        // update the main content by replacing fragments
        FragmentManager fragmentManager = getFragmentManager();
        fragmentManager.beginTransaction()
                .replace(R.id.container, PlaceholderFragment.newInstance(position + 1))
                .commit();
    }

    public void onSectionAttached(int number) {
        switch (number) {
            case 1:
                mTitle = getString(R.string.title_section1);
                break;
            case 2:
                mTitle = getString(R.string.title_section2);
                break;
            case 3:
                mTitle = getString(R.string.title_section3);
                break;
        }
    }

    public void restoreActionBar() {
        ActionBar actionBar = getActionBar();
        actionBar.setNavigationMode(ActionBar.NAVIGATION_MODE_STANDARD);
        actionBar.setDisplayShowTitleEnabled(true);
        actionBar.setTitle(mTitle);
    }


    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        if (!mNavigationDrawerFragment.isDrawerOpen()) {
            // Only show items in the action bar relevant to this screen
            // if the drawer is not showing. Otherwise, let the drawer
            // decide what to show in the action bar.
            getMenuInflater().inflate(R.menu.main, menu);
            restoreActionBar();
            return true;
        }
        return super.onCreateOptionsMenu(menu);
    }

    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        // Handle action bar item clicks here. The action bar will
        // automatically handle clicks on the Home/Up button, so long
        // as you specify a parent activity in AndroidManifest.xml.
        int id = item.getItemId();
        if (id == R.id.action_settings) {
            return true;
        }
        return super.onOptionsItemSelected(item);
    }

    /**
     * A placeholder fragment containing a simple view.
     */
    public static class PlaceholderFragment extends Fragment {
        /**
         * The fragment argument representing the section number for this
         * fragment.
         */
        private static final String ARG_SECTION_NUMBER = "section_number";

        /**
         * Returns a new instance of this fragment for the given section
         * number.
         */
        public static PlaceholderFragment newInstance(int sectionNumber) {
            PlaceholderFragment fragment = new PlaceholderFragment();
            Bundle args = new Bundle();
            args.putInt(ARG_SECTION_NUMBER, sectionNumber);
            fragment.setArguments(args);
            return fragment;
        }

        private WebView mWebView;
        private View mCustomView;
        private int mOriginalSystemUiVisibility;
        private int mOriginalOrientation;
        private WebChromeClient.CustomViewCallback mCustomViewCallback;
        protected FrameLayout mFullscreenContainer;
        private Handler mHandler;

        public PlaceholderFragment() {
            mHandler = new Handler();
        }

        @Override
        public View onCreateView(LayoutInflater inflater, ViewGroup container,
                Bundle savedInstanceState) {
            View rootView = inflater.inflate(R.layout.fragment_main, container, false);
            mWebView = (WebView) rootView.findViewById(R.id.fragment_main_webview);

            setUpWebViewDefaults(mWebView);

            mWebView.loadUrl("file:///android_asset/www/index.html");

            mWebView.setWebChromeClient(new WebChromeClient() {

                @Override
                public Bitmap getDefaultVideoPoster() {
                    if(getActivity() == null) {
                        return null;
                    }

                    return BitmapFactory.decodeResource(getActivity().getApplicationContext().getResources(),
                            R.drawable.video_poster);
                }

                @Override
                public void onShowCustomView(View view,
                                             WebChromeClient.CustomViewCallback callback) {
                    // if a view already exists then immediately terminate the new one
                    if (mCustomView != null) {
                        onHideCustomView();
                        return;
                    }

                    // 1. Stash the current state
                    mCustomView = view;
                    mOriginalSystemUiVisibility = getActivity().getWindow().getDecorView().getSystemUiVisibility();
                    mOriginalOrientation = getActivity().getRequestedOrientation();

                    // 2. Stash the custom view callback
                    mCustomViewCallback = callback;

                    // 3. Add the custom view to the view hierarchy
                    FrameLayout decor = (FrameLayout) getActivity().getWindow().getDecorView();
                    decor.addView(mCustomView, new FrameLayout.LayoutParams(
                            ViewGroup.LayoutParams.MATCH_PARENT,
                            ViewGroup.LayoutParams.MATCH_PARENT));


                    // 4. Change the state of the window
                    getActivity().getWindow().getDecorView().setSystemUiVisibility(
                            View.SYSTEM_UI_FLAG_LAYOUT_STABLE |
                                    View.SYSTEM_UI_FLAG_LAYOUT_HIDE_NAVIGATION |
                                    View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN |
                                    View.SYSTEM_UI_FLAG_HIDE_NAVIGATION |
                                    View.SYSTEM_UI_FLAG_FULLSCREEN |
                                    View.SYSTEM_UI_FLAG_IMMERSIVE);
                    getActivity().setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_LANDSCAPE);
                }

                @Override
                public void onHideCustomView() {
                    // 1. Remove the custom view
                    FrameLayout decor = (FrameLayout) getActivity().getWindow().getDecorView();
                    decor.removeView(mCustomView);
                    mCustomView = null;

                    // 2. Restore the state to it's original form
                    getActivity().getWindow().getDecorView()
                            .setSystemUiVisibility(mOriginalSystemUiVisibility);
                    getActivity().setRequestedOrientation(mOriginalOrientation);

                    // 3. Call the custom view callback
                    mCustomViewCallback.onCustomViewHidden();
                    mCustomViewCallback = null;

                }

            });

            return rootView;
        }

        @Override
        public void onAttach(Activity activity) {
            super.onAttach(activity);
            ((MainActivity) activity).onSectionAttached(
                    getArguments().getInt(ARG_SECTION_NUMBER));
        }

        /**
         * Convenience method to set some generic defaults for a
         * given WebView
         *
         * @param webView
         */
        @TargetApi(Build.VERSION_CODES.HONEYCOMB)
        private void setUpWebViewDefaults(WebView webView) {
            WebSettings settings = webView.getSettings();

            // Enable Javascript
            settings.setJavaScriptEnabled(true);

            // Use WideViewport and Zoom out if there is no viewport defined
            settings.setUseWideViewPort(true);
            settings.setLoadWithOverviewMode(true);

            // Enable pinch to zoom without the zoom buttons
            settings.setBuiltInZoomControls(true);

            // Allow use of Local Storage
            settings.setDomStorageEnabled(true);

            if(Build.VERSION.SDK_INT > Build.VERSION_CODES.HONEYCOMB) {
                // Hide the zoom controls for HONEYCOMB+
                settings.setDisplayZoomControls(false);
            }

            // Enable remote debugging via chrome://inspect
            if(Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT) {
                WebView.setWebContentsDebuggingEnabled(true);
            }

            webView.setWebViewClient(new WebViewClient());
        }
    }

}