Quiz Android App Template

Code Snippet

package com.glam;

import java.util.ArrayList;

import android.animation.ArgbEvaluator;
import android.animation.ObjectAnimator;
import android.animation.TypeEvaluator;
import android.animation.ValueAnimator;
import android.annotation.SuppressLint;
import android.content.Intent;
import android.content.res.Configuration;
import android.os.Build;
import android.os.Bundle;
import android.support.v4.view.GravityCompat;
import android.support.v4.view.ViewCompat;
import android.support.v4.widget.DrawerLayout;
import android.support.v7.app.ActionBarDrawerToggle;
import android.support.v7.widget.LinearLayoutManager;
import android.support.v7.widget.RecyclerView;
import android.support.v7.widget.Toolbar;
import android.view.MenuItem;
import android.view.View;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.ListView;

import com.glam.custom.CustomActivity;
import com.glam.custom.CustomFragment;
import com.glam.model.Data;
import com.glam.ui.Checkout;
import com.glam.ui.LeftNavAdapter;
import com.glam.ui.MainFragment;
import com.glam.ui.OnSale;

/**
 * The Activity MainActivity will launched after the Login and it is the
 * Home/Base activity of the app which holds all the Fragments and also show the
 * Sliding Navigation drawer. You can write your code for displaying actual
 * items on Drawer layout.
 */
@SuppressLint("InlinedApi")
public class MainActivity extends CustomActivity
{

	/** The drawer layout. */
	private DrawerLayout drawerLayout;

	/** ListView for left side drawer. */
	private ListView drawerLeft;

	/** The drawer toggle. */
	private ActionBarDrawerToggle drawerToggle;

	/** The m action bar auto hide enabled. */
	private boolean mActionBarAutoHideEnabled = true;

	/** The m action bar shown. */
	private boolean mActionBarShown = true;

	/** The m status bar color animator. */
	private ObjectAnimator mStatusBarColorAnimator;

	/** The Constant ARGB_EVALUATOR. */
	@SuppressWarnings("rawtypes")
	private static final TypeEvaluator ARGB_EVALUATOR = new ArgbEvaluator();

	/** The m action bar auto hide sensivity. */
	private int mActionBarAutoHideSensivity = 0;

	/** The m action bar auto hide min y. */
	private int mActionBarAutoHideMinY = 0;

	/** The m action bar auto hide signal. */
	private int mActionBarAutoHideSignal = 0;

	/** The toolbar. */
	public Toolbar toolbar;

	/* (non-Javadoc)
	 * @see com.newsfeeder.custom.CustomActivity#onCreate(android.os.Bundle)
	 */
	@Override
	protected void onCreate(Bundle savedInstanceState)
	{
		super.onCreate(savedInstanceState);
		setContentView(R.layout.activity_main);

		toolbar = (Toolbar) findViewById(R.id.my_awesome_toolbar);
		setSupportActionBar(toolbar);

		setupDrawer();
		setupContainer(1);

	}

	/**
	 * Setup the drawer layout. This method also includes the method calls for
	 * setting up the Left & Right side drawers.
	 */
	private void setupDrawer()
	{
		drawerLayout = (DrawerLayout) findViewById(R.id.drawer_layout);
		drawerLayout.setDrawerShadow(R.drawable.drawer_shadow,
				GravityCompat.START);
		drawerToggle = new ActionBarDrawerToggle(this, drawerLayout,
				R.string.drawer_open, R.string.drawer_close) {
			@Override
			public void onDrawerClosed(View view)
			{
			}

			@Override
			public void onDrawerOpened(View drawerView)
			{
			}
		};
		drawerLayout.setDrawerListener(drawerToggle);
		drawerLayout.closeDrawers();

		setupLeftNavDrawer();

		drawerLayout.setDrawerListener(new DrawerLayout.DrawerListener() {
			@Override
			public void onDrawerClosed(View drawerView)
			{
				onNavDrawerStateChanged(false, false);
			}

			@Override
			public void onDrawerOpened(View drawerView)
			{
				onNavDrawerStateChanged(true, false);
			}

			@Override
			public void onDrawerStateChanged(int newState)
			{
				onNavDrawerStateChanged(
						drawerLayout.isDrawerOpen(GravityCompat.START),
						newState != DrawerLayout.STATE_IDLE);
			}

			@Override
			public void onDrawerSlide(View drawerView, float slideOffset)
			{
			}
		});

	}

	/**
	 * Called On navigation drawer state changed.
	 * 
	 * @param isOpen
	 *            true if drawer is open
	 * @param isAnimating
	 *            true of drawer is animating
	 */
	private void onNavDrawerStateChanged(boolean isOpen, boolean isAnimating)
	{
		if (mActionBarAutoHideEnabled && isOpen)
		{
			autoShowOrHideActionBar(true);
		}
	}

	/**
	 * Auto show or hide action bar.
	 * 
	 * @param show
	 *            true to show the bar
	 */
	private void autoShowOrHideActionBar(boolean show)
	{
		if (show == mActionBarShown)
		{
			return;
		}

		mActionBarShown = show;
		onActionBarAutoShowOrHide(show);
	}

	/**
	 * Called On action bar auto show or hide.
	 * 
	 * @param shown
	 *            true is action bar is showing
	 */
	@SuppressLint("NewApi")
	private void onActionBarAutoShowOrHide(final boolean shown)
	{
		if (mStatusBarColorAnimator != null)
		{
			mStatusBarColorAnimator.cancel();
		}
		mStatusBarColorAnimator = ObjectAnimator.ofInt(
				drawerLayout,
				drawerLayout != null ? "statusBarBackgroundColor"
						: "statusBarColor",
				shown ? getResources().getColor(R.color.main_color_dk)
						: getResources().getColor(R.color.main_color),
				shown ? getResources().getColor(R.color.main_color)
						: getResources().getColor(R.color.main_color_dk))
				.setDuration(250);
		if (drawerLayout != null)
		{
			mStatusBarColorAnimator
					.addUpdateListener(new ValueAnimator.AnimatorUpdateListener() {
						@Override
						public void onAnimationUpdate(
								ValueAnimator valueAnimator)
						{
							ViewCompat.postInvalidateOnAnimation(drawerLayout);
							if (shown)
							{
								getSupportActionBar().show();
								if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP)
								{
									getWindow().setStatusBarColor(
											getResources().getColor(
													R.color.main_color_dk));
								}
							}
							else
							{
								getSupportActionBar().hide();
								if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP)
								{
									getWindow().setStatusBarColor(
											getResources().getColor(
													R.color.main_color));
								}
							}
						}
					});
		}
		mStatusBarColorAnimator.setEvaluator(ARGB_EVALUATOR);
		mStatusBarColorAnimator.start();

	}

	/**
	 * Enable action bar auto hide.
	 * 
	 * @param recList
	 *            the RecyclerView list
	 */
	public void enableActionBarAutoHide(final RecyclerView recList)
	{
		initActionBarAutoHide();
		recList.setOnScrollListener(new RecyclerView.OnScrollListener() {
			final static int ITEMS_THRESHOLD = 3;
			int lastFvi = 0;

			@Override
			public void onScrollStateChanged(RecyclerView view, int scrollState)
			{
			}

			@Override
			public void onScrolled(RecyclerView recyclerView, int dx, int dy)
			{
				super.onScrolled(recyclerView, dx, dy);

				// autoShowOrHideActionBar(recyclerView.getScrollY()<=100);

				try
				{
					LinearLayoutManager llm = (LinearLayoutManager) recyclerView
							.getLayoutManager();
					int firstVisibleItem = llm.findFirstVisibleItemPosition();
					onMainContentScrolled(
							firstVisibleItem <= ITEMS_THRESHOLD ? 0
									: Integer.MAX_VALUE, lastFvi
									- firstVisibleItem > 0 ? Integer.MIN_VALUE
									: lastFvi == firstVisibleItem ? 0
											: Integer.MAX_VALUE);
					lastFvi = firstVisibleItem;
				} catch (Exception e)
				{
					e.printStackTrace();
				}
			}

			/* @Override
			 public void onScroll(RecyclerView view, int firstVisibleItem, int visibleItemCount, int totalItemCount) {
			     onMainContentScrolled(firstVisibleItem <= ITEMS_THRESHOLD ? 0 : Integer.MAX_VALUE,
			             lastFvi - firstVisibleItem > 0 ? Integer.MIN_VALUE :
			                     lastFvi == firstVisibleItem ? 0 : Integer.MAX_VALUE
			     );
			     lastFvi = firstVisibleItem;
			 }*/
		});
	}

	/**
	 * Indicates that the main content has scrolled (for the purposes of
	 * showing/hiding the action bar for the "action bar auto hide" effect).
	 * currentY and deltaY may be exact (if the underlying view supports it) or
	 * may be approximate indications: deltaY may be INT_MAX to mean
	 * "scrolled forward indeterminately" and INT_MIN to mean
	 * "scrolled backward indeterminately". currentY may be 0 to mean "somewhere
	 * close to the start of the list" and INT_MAX to mean "we don't know, but
	 * not at the start of the list"
	 * 
	 * @param currentY
	 *            the current y
	 * @param deltaY
	 *            the delta y
	 */
	private void onMainContentScrolled(int currentY, int deltaY)
	{
		if (deltaY > mActionBarAutoHideSensivity)
		{
			deltaY = mActionBarAutoHideSensivity;
		}
		else if (deltaY < -mActionBarAutoHideSensivity)
		{
			deltaY = -mActionBarAutoHideSensivity;
		}

		if (Math.signum(deltaY) * Math.signum(mActionBarAutoHideSignal) < 0)
		{
			// deltaY is a motion opposite to the accumulated signal, so reset
			// signal
			mActionBarAutoHideSignal = deltaY;
		}
		else
		{
			// add to accumulated signal
			mActionBarAutoHideSignal += deltaY;
		}

		boolean shouldShow = currentY < mActionBarAutoHideMinY
				|| mActionBarAutoHideSignal <= -mActionBarAutoHideSensivity;
		autoShowOrHideActionBar(shouldShow);
	}

	/**
	 * Initializes the Action Bar auto-hide (aka Quick Recall) effect.
	 */
	public void initActionBarAutoHide()
	{
		mActionBarAutoHideEnabled = true;
		mActionBarAutoHideMinY = getResources().getDimensionPixelSize(
				R.dimen.action_bar_auto_hide_min_y);
		mActionBarAutoHideSensivity = getResources().getDimensionPixelSize(
				R.dimen.action_bar_auto_hide_sensivity);
	}

	/**
	 * Setup the left navigation drawer/slider. You can add your logic to load
	 * the contents to be displayed on the left side drawer. It will also setup
	 * the Header and Footer contents of left drawer. This method also apply the
	 * Theme for components of Left drawer.
	 */
	@SuppressLint("InflateParams")
	private void setupLeftNavDrawer()
	{
		drawerLeft = (ListView) findViewById(R.id.left_drawer);

		View header = getLayoutInflater().inflate(R.layout.left_nav_header,
				null);

		drawerLeft.addHeaderView(header);

		final ArrayList<Data> al = new ArrayList<Data>();
		al.add(new Data(new String[] { "Explore" }, new int[] {
				R.drawable.ic_nav1, R.drawable.ic_nav1_sel }));
		al.add(new Data(new String[] { "Favourites" }, new int[] {
				R.drawable.ic_nav2, R.drawable.ic_nav2_sel }));
		al.add(new Data(new String[] { "Cart" }, new int[] {
				R.drawable.ic_nav3, R.drawable.ic_nav3_sel }));
		al.add(new Data(new String[] { "Settings" }, new int[] {
				R.drawable.ic_nav4, R.drawable.ic_nav4_sel }));
		al.add(new Data(new String[] { "Logout" }, new int[] {
				R.drawable.ic_nav5, R.drawable.ic_nav5_sel }));

		final LeftNavAdapter adp = new LeftNavAdapter(this, al);
		drawerLeft.setAdapter(adp);
		drawerLeft.setOnItemClickListener(new OnItemClickListener() {

			@Override
			public void onItemClick(AdapterView<?> l, View arg1, int pos,
					long arg3)
			{
				if (pos != 0)
					adp.setSelection(pos - 1);
				drawerLayout.closeDrawers();
				setupContainer(pos);
			}
		});

	}

	/**
	 * Setup the container fragment for drawer layout. This method will setup
	 * the grid view display of main contents. You can customize this method as
	 * per your need to display specific content.
	 * 
	 * @param pos
	 *            the new up container
	 */
	private void setupContainer(int pos)
	{
		/*if(Build.VERSION.SDK_INT>=Build.VERSION_CODES.LOLLIPOP)
		{
			getWindow().clearFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_NAVIGATION);
			getWindow().clearFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS);
			toolbar.setBackgroundColor(getResources().getColor(R.color.main_color));
		}*/

		CustomFragment f = null;
		String title = null;

		if (pos == 0)
		{
			return;
		}
		else if (pos == 1)
			f = new MainFragment();
		else if (pos == 2)
		{
			f = new OnSale();
			title = "On Sale";
		}
		else if (pos == 3)
		{
			f = new Checkout();
			title = "Checkout";
		}
		else if (pos == 4)
		{
			f = new com.glam.ui.Settings();
			title = "Settings";
		}
		else if (pos == 5)
		{
			startActivity(new Intent(this, Login.class));
			finish();
		}
		if (f == null)
			return;

		getSupportFragmentManager().beginTransaction()
				.replace(R.id.content_frame, f).commit();
		if (getSupportActionBar() != null)
			getSupportActionBar().setTitle(title);
	}

	/* (non-Javadoc)
	 * @see android.app.Activity#onPostCreate(android.os.Bundle)
	 */
	@Override
	protected void onPostCreate(Bundle savedInstanceState)
	{
		super.onPostCreate(savedInstanceState);
		// Sync the toggle state after onRestoreInstanceState has occurred.
		drawerToggle.syncState();
	}

	/* (non-Javadoc)
	 * @see android.app.Activity#onConfigurationChanged(android.content.res.Configuration)
	 */
	@Override
	public void onConfigurationChanged(Configuration newConfig)
	{
		super.onConfigurationChanged(newConfig);
		// Pass any configuration change to the drawer toggle
		drawerToggle.onConfigurationChanged(newConfig);
	}

	/* (non-Javadoc)
	 * @see com.whatshere.custom.CustomActivity#onOptionsItemSelected(android.view.MenuItem)
	 */
	@Override
	public boolean onOptionsItemSelected(MenuItem item)
	{
		if (drawerToggle.onOptionsItemSelected(item))
		{
			return true;
		}

		return super.onOptionsItemSelected(item);
	}
}