BaseActivity.java

package de.tum.in.tumcampusapp.activities.generic;

import android.content.Intent;
import android.os.Bundle;
import android.support.design.widget.NavigationView;
import android.support.v4.app.NavUtils;
import android.support.v4.app.TaskStackBuilder;
import android.support.v4.widget.DrawerLayout;
import android.support.v7.app.AppCompatActivity;
import android.support.v7.widget.Toolbar;
import android.view.MenuItem;
import android.view.View;
import android.widget.TextView;

import com.google.common.base.Optional;

import de.hdodenhof.circleimageview.CircleImageView;
import de.tum.in.tumcampusapp.R;
import de.tum.in.tumcampusapp.activities.MainActivity;
import de.tum.in.tumcampusapp.activities.UserPreferencesActivity;
import de.tum.in.tumcampusapp.auxiliary.Const;
import de.tum.in.tumcampusapp.auxiliary.DrawerMenuHelper;
import de.tum.in.tumcampusapp.auxiliary.ImplicitCounter;
import de.tum.in.tumcampusapp.auxiliary.Utils;
import de.tum.in.tumcampusapp.models.tumo.Employee;
import de.tum.in.tumcampusapp.tumonline.TUMOnlineConst;
import de.tum.in.tumcampusapp.tumonline.TUMOnlineRequest;

/**
 * Takes care of the navigation drawer which might be attached to the activity and also handles up navigation
 */
public abstract class BaseActivity extends AppCompatActivity {

    /**
     * Default layouts for user interaction
     */
    private final int mLayoutId;

    protected DrawerLayout mDrawerLayout;
    protected NavigationView mDrawerList;
    protected View headerView;

    /**
     * Standard constructor for BaseActivity.
     * The given layout might include a DrawerLayout.
     *
     * @param layoutId Resource id of the xml layout that should be used to inflate the activity
     */
    public BaseActivity(int layoutId) {
        mLayoutId = layoutId;
    }

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        ImplicitCounter.count(this);
        setContentView(mLayoutId);

        // Get handles to navigation drawer
        mDrawerLayout = (DrawerLayout) findViewById(R.id.drawer_layout);
        mDrawerList = (NavigationView) findViewById(R.id.left_drawer);

        // Setup the navigation drawer if present in the layout
        if (mDrawerList != null && mDrawerLayout != null) {
            // Set personalization in the navdrawer
            headerView = mDrawerList.inflateHeaderView(R.layout.drawer_header);
            TextView nameText = (TextView) headerView.findViewById(R.id.name);
            TextView emailText = (TextView) headerView.findViewById(R.id.email);
            nameText.setText(Utils.getSetting(this, Const.CHAT_ROOM_DISPLAY_NAME,
                    getString(R.string.token_not_enabled)));
            StringBuffer email = new StringBuffer(Utils.getSetting(this, Const.LRZ_ID, ""));
            if (!email.toString().isEmpty()) {
                email.append("@mytum.de");
            }
            emailText.setText(email);

            // Set picture as set in TUMOnline
            fetchProfilePicture();

            DrawerMenuHelper helper = new DrawerMenuHelper(this, mDrawerLayout);
            helper.populateMenu(mDrawerList.getMenu());

            // Set the NavigationDrawer's click listener
            mDrawerList.setNavigationItemSelectedListener(helper);
        }

        String parent = NavUtils.getParentActivityName(this);

        Toolbar toolbar = (Toolbar) findViewById(R.id.main_toolbar);
        setSupportActionBar(toolbar);
        if (getSupportActionBar() != null && (
                (parent != null && parent.equals(MainActivity.class.getName()))
                        || this instanceof MainActivity
                        || this instanceof UserPreferencesActivity
        )) {
            getSupportActionBar().setDisplayHomeAsUpEnabled(true);
            getSupportActionBar().setHomeButtonEnabled(true);
        }
    }


    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        if (item.getItemId() == android.R.id.home) {
            // Respond to the action bar's Up/Home button
            Intent upIntent = NavUtils.getParentActivityIntent(this);
            upIntent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
            if (NavUtils.shouldUpRecreateTask(this, upIntent)) {
                // This activity is NOT part of this apps task, so create a new task
                // when navigating up, with a synthesized back stack.
                TaskStackBuilder.create(this).addNextIntentWithParentStack(upIntent).startActivities();
            } else {
                // This activity is part of this apps task, so simply
                // navigate up to the logical parent activity.
                NavUtils.navigateUpTo(this, upIntent);
            }
            return true;
        }
        return super.onOptionsItemSelected(item);
    }

    private void fetchProfilePicture() {
        String id = Utils.getSetting(this, Const.TUMO_PIDENT_NR, "");
        if (id.isEmpty()) {
            return;
        }

        final TUMOnlineRequest<Employee> request = new TUMOnlineRequest<>(TUMOnlineConst.PERSON_DETAILS, this, true);
        request.setParameter("pIdentNr", id);

        new Thread(new Runnable() {
            @Override
            public void run() {
                final Optional<Employee> result = request.fetch();
                if (!result.isPresent()) {
                    return;
                }
                runOnUiThread(new Runnable() {
                    @Override
                    public void run() {
                        CircleImageView picture = (CircleImageView) headerView.findViewById(R.id.profile_image);
                        if (result.get().getImage() != null) {
                            picture.setImageBitmap(result.get().getImage());
                        }
                    }
                });
            }
        }).start();
    }
}