edu.dartmouth.cs.stressmeter.psm.MainActivity.java Source code

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Here is the source code for edu.dartmouth.cs.stressmeter.psm.MainActivity.java

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/*
 * Copyright 2015 Steven Mulder
 *
 * 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 edu.dartmouth.cs.stressmeter.psm;

import android.content.res.Configuration;
import android.os.Bundle;
import android.os.Handler;
import android.support.design.widget.NavigationView;
import android.support.v4.view.GravityCompat;
import android.support.v4.widget.DrawerLayout;
import android.support.v7.app.ActionBarDrawerToggle;
import android.support.v7.app.AppCompatActivity;
import android.support.v7.widget.Toolbar;
import android.view.MenuItem;

import edu.dartmouth.cs.stressmeter.R;

public class MainActivity extends AppCompatActivity implements NavigationView.OnNavigationItemSelectedListener {

    private static final long DRAWER_CLOSE_DELAY_MS = 350;
    private static final String NAV_ITEM_ID = "navItemId";

    private final PSMMainFragment mFirstFragment = new PSMMainFragment();
    private final ResultsFragment mSecondFragment = new ResultsFragment();
    private final Handler mDrawerActionHandler = new Handler();
    private DrawerLayout mDrawerLayout;
    private ActionBarDrawerToggle mDrawerToggle;
    private int mNavItemId;

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

        mDrawerLayout = (DrawerLayout) findViewById(R.id.drawer_layout);
        Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
        setSupportActionBar(toolbar);

        // load saved navigation state if present

        mNavItemId = R.id.drawer_item_1;

        // listen for navigation events
        NavigationView navigationView = (NavigationView) findViewById(R.id.navigation);
        navigationView.setNavigationItemSelectedListener(this);

        // select the correct nav menu item
        navigationView.getMenu().findItem(mNavItemId).setChecked(true);

        // set up the hamburger icon to open and close the drawer
        mDrawerToggle = new ActionBarDrawerToggle(this, mDrawerLayout, toolbar, R.string.open, R.string.close);
        mDrawerLayout.setDrawerListener(mDrawerToggle);
        mDrawerToggle.syncState();

        navigate(mNavItemId);
    }

    /**
     * Performs the actual navigation logic, updating the main content fragment.
     */
    private void navigate(final int itemId) {
        EMAAlert.getAlertObject().cancel();

        switch (itemId) {
        case R.id.drawer_item_1:
            getFragmentManager().beginTransaction().replace(R.id.content, mFirstFragment).commit();
            break;
        case R.id.drawer_item_2:
            getFragmentManager().beginTransaction().replace(R.id.content, mSecondFragment).commit();
            break;
        default:
            // ignore
            break;
        }
    }

    /**
     * Handles clicks on the navigation menu.
     */
    @Override
    public boolean onNavigationItemSelected(final MenuItem menuItem) {
        // update highlighted item in the navigation menu
        menuItem.setChecked(true);
        mNavItemId = menuItem.getItemId();

        // allow some time after closing the drawer before performing real navigation
        // so the user can see what is happening
        mDrawerLayout.closeDrawer(GravityCompat.START);
        mDrawerActionHandler.postDelayed(new Runnable() {
            @Override
            public void run() {
                navigate(menuItem.getItemId());
            }
        }, DRAWER_CLOSE_DELAY_MS);
        return true;
    }

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

    @Override
    public boolean onOptionsItemSelected(final MenuItem item) {
        if (item.getItemId() == android.support.v7.appcompat.R.id.home) {
            return mDrawerToggle.onOptionsItemSelected(item);
        }
        return super.onOptionsItemSelected(item);
    }

    @Override
    public void onBackPressed() {
        if (mDrawerLayout.isDrawerOpen(GravityCompat.START)) {
            mDrawerLayout.closeDrawer(GravityCompat.START);
        } else {
            super.onBackPressed();
        }
    }

    @Override
    protected void onSaveInstanceState(final Bundle outState) {
        super.onSaveInstanceState(outState);
        outState.putInt(NAV_ITEM_ID, mNavItemId);
    }
}