MainActivity.java

package com.uberspot.a2048;

import android.annotation.SuppressLint;
import android.app.Activity;
import android.content.SharedPreferences;
import android.content.pm.ActivityInfo;
import android.content.res.Configuration;
import android.os.Build;
import android.os.Bundle;
import android.preference.PreferenceManager;
import android.provider.Settings;
import android.provider.Settings.SettingNotFoundException;
import android.view.Menu;
import android.view.MotionEvent;
import android.view.View;
import android.view.View.OnTouchListener;
import android.view.Window;
import android.view.WindowManager;
import android.view.WindowManager.LayoutParams;
import android.webkit.WebSettings;
import android.webkit.WebSettings.RenderPriority;
import android.webkit.WebView;
import android.widget.Toast;

public class MainActivity extends Activity {

	private WebView mWebView;
	private long mLastBackPress;
	private static final long mBackPressThreshold = 3500;
	private static final String IS_FULLSCREEN_PREF = "is_fullscreen_pref";
	private static boolean DEF_FULLSCREEN = true;
	private long mLastTouch;
	private static final long mTouchThreshold = 2000;
	private Toast pressBackToast;

	@SuppressLint({ "SetJavaScriptEnabled", "NewApi", "ShowToast" })
	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);

		// Don't show an action bar or title
		requestWindowFeature(Window.FEATURE_NO_TITLE);

		// If on android 3.0+ activate hardware acceleration
		if (Build.VERSION.SDK_INT >= 11){
            getWindow().setFlags(
                    WindowManager.LayoutParams.FLAG_HARDWARE_ACCELERATED,
                    WindowManager.LayoutParams.FLAG_HARDWARE_ACCELERATED);
        }

		// Apply previous setting about showing status bar or not
		applyFullScreen(isFullScreen());

		// Check if screen rotation is locked in settings
		boolean isOrientationEnabled = false;
        try {
            isOrientationEnabled = Settings.System.getInt(getContentResolver(),
                    Settings.System.ACCELEROMETER_ROTATION) == 1;
        } catch (SettingNotFoundException e) { }

        // If rotation isn't locked and it's a LARGE screen then add orientation changes based on sensor
        int screenLayout = getResources().getConfiguration().screenLayout & Configuration.SCREENLAYOUT_SIZE_MASK;
		if ( (screenLayout == Configuration.SCREENLAYOUT_SIZE_LARGE
		        || screenLayout == Configuration.SCREENLAYOUT_SIZE_XLARGE )
		            && isOrientationEnabled) {
			setRequestedOrientation (ActivityInfo.SCREEN_ORIENTATION_SENSOR);
		}

		setContentView(R.layout.activity_main);

		// Load webview with game
		mWebView = (WebView) findViewById(R.id.mainWebView);
		WebSettings settings = mWebView.getSettings();
		String packageName = getPackageName();
		settings.setJavaScriptEnabled(true);
		settings.setDomStorageEnabled(true);
		settings.setDatabaseEnabled(true);
		settings.setRenderPriority(RenderPriority.HIGH);
		settings.setDatabasePath("/data/data/" + packageName + "/databases");

		// If there is a previous instance restore it in the webview
		if (savedInstanceState != null) {
			mWebView.restoreState(savedInstanceState);
	    } else {
	    	mWebView.loadUrl("file:///android_asset/2048/index.html");
	    }

		Toast.makeText(getApplication(),
				R.string.toggle_fullscreen, Toast.LENGTH_SHORT).show();
		// Set fullscreen toggle on webview LongClick
		mWebView.setOnTouchListener(new OnTouchListener() {
			@Override
			public boolean onTouch(View v, MotionEvent event) {
				// Implement a long touch action by comparing
				// time between action up and action down
				long currentTime = System.currentTimeMillis();
			    if(event.getAction() == MotionEvent.ACTION_UP &&
						Math.abs(currentTime - mLastTouch) > mTouchThreshold) {
			    	boolean toggledFullScreen = !isFullScreen();
					saveFullScreen(toggledFullScreen);
		        	applyFullScreen(toggledFullScreen);
			    } else if(event.getAction() == MotionEvent.ACTION_DOWN) {
			    	mLastTouch = currentTime;
			    }
				// return so that the event isn't consumed but used
				// by the webview as well
				return false;
			}});

		pressBackToast = Toast.makeText(getApplicationContext(),
				R.string.press_back_again_to_exit, Toast.LENGTH_SHORT);
	}

	@Override
	protected void onSaveInstanceState(Bundle outState) {
		mWebView.saveState(outState);
	}

	@Override
	public boolean onCreateOptionsMenu(Menu menu) {
		// Inflate the menu; this adds items to the action bar if it is present.
		//getMenuInflater().inflate(R.menu.main, menu);
		return true;
	}

	private void saveFullScreen(boolean isFullScreen) {
		// save in preferences
		SharedPreferences.Editor editor = PreferenceManager
								.getDefaultSharedPreferences(this).edit();
	    editor.putBoolean(IS_FULLSCREEN_PREF, isFullScreen);
	    editor.commit();
	}

	private boolean isFullScreen() {
		return PreferenceManager
				.getDefaultSharedPreferences(this)
				.getBoolean(IS_FULLSCREEN_PREF, DEF_FULLSCREEN);
	}

	/**
	 * Toggles the activitys fullscreen mode by setting the corresponding window flag
	 * @param isFullScreen
	 */
	private void applyFullScreen(boolean isFullScreen) {
		if(isFullScreen) {
			getWindow().clearFlags(LayoutParams.FLAG_FULLSCREEN);
		} else {
	        getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN,
	            WindowManager.LayoutParams.FLAG_FULLSCREEN);
		}
	}

	@Override
	public void onConfigurationChanged(Configuration newConfig) {
	  super.onConfigurationChanged(newConfig);
	}

	@Override
	public void onBackPressed() {
	    long currentTime = System.currentTimeMillis();
	    if (Math.abs(currentTime - mLastBackPress) > mBackPressThreshold) {
	        pressBackToast.show();
	        mLastBackPress = currentTime;
	    } else {
	    	pressBackToast.cancel();
	        super.onBackPressed();
	    }
	}
}