com.jpventura.alexandria.MainActivity.java Source code

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Here is the source code for com.jpventura.alexandria.MainActivity.java

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/*
 * Copyright 2015 Udacity, Inc.
 *
 * 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 com.jpventura.alexandria;

import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.content.IntentFilter;
import android.content.res.Configuration;
import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentManager;
import android.support.v4.content.LocalBroadcastManager;
import android.support.v4.widget.DrawerLayout;
import android.support.v7.app.ActionBar;
import android.support.v7.app.ActionBarActivity;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.widget.Toast;

import com.jpventura.alexandria.api.Callback;

public class MainActivity extends ActionBarActivity
        implements NavigationDrawerFragment.NavigationDrawerCallbacks, Callback {

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

    /**
     * Used to store the last screen title. For use in {@link #restoreActionBar()}.
     */
    private CharSequence title;
    public static boolean IS_TABLET = false;
    private BroadcastReceiver messageReciever;

    public static final String MESSAGE_EVENT = "MESSAGE_EVENT";
    public static final String MESSAGE_KEY = "MESSAGE_EXTRA";

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        IS_TABLET = isTablet();
        if (IS_TABLET) {
            setContentView(R.layout.activity_main_tablet);
        } else {
            setContentView(R.layout.activity_main);
        }

        messageReciever = new MessageReciever();
        IntentFilter filter = new IntentFilter(MESSAGE_EVENT);
        LocalBroadcastManager.getInstance(this).registerReceiver(messageReciever, filter);

        navigationDrawerFragment = (NavigationDrawerFragment) getSupportFragmentManager()
                .findFragmentById(R.id.navigation_drawer);
        title = getTitle();

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

    @Override
    public void onNavigationDrawerItemSelected(int position) {

        FragmentManager fragmentManager = getSupportFragmentManager();
        Fragment nextFragment;

        switch (position) {
        default:
        case 0:
            nextFragment = new ListOfBooks();
            break;
        case 1:
            nextFragment = new AddBook();
            break;
        case 2:
            nextFragment = new About();
            break;

        }

        fragmentManager.beginTransaction().replace(R.id.container, nextFragment).addToBackStack((String) title)
                .commit();
    }

    public void setTitle(int titleId) {
        title = getString(titleId);
    }

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

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        if (!navigationDrawerFragment.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) {
            startActivity(new Intent(this, SettingsActivity.class));
            return true;
        }

        return super.onOptionsItemSelected(item);
    }

    @Override
    protected void onDestroy() {
        LocalBroadcastManager.getInstance(this).unregisterReceiver(messageReciever);
        super.onDestroy();
    }

    @Override
    public void onItemSelected(String ean) {
        Bundle args = new Bundle();
        args.putString(BookDetail.EAN_KEY, ean);

        BookDetail fragment = new BookDetail();
        fragment.setArguments(args);

        int id = R.id.container;
        if (findViewById(R.id.right_container) != null) {
            id = R.id.right_container;
        }
        getSupportFragmentManager().beginTransaction().replace(id, fragment).addToBackStack("Book Detail").commit();

    }

    private class MessageReciever extends BroadcastReceiver {
        @Override
        public void onReceive(Context context, Intent intent) {
            if (intent.getStringExtra(MESSAGE_KEY) != null) {
                Toast.makeText(MainActivity.this, intent.getStringExtra(MESSAGE_KEY), Toast.LENGTH_LONG).show();
            }
        }
    }

    public void goBack(View view) {
        getSupportFragmentManager().popBackStack();
    }

    private boolean isTablet() {
        return (getApplicationContext().getResources().getConfiguration().screenLayout
                & Configuration.SCREENLAYOUT_SIZE_MASK) >= Configuration.SCREENLAYOUT_SIZE_LARGE;
    }

    @Override
    public void onBackPressed() {
        if (getSupportFragmentManager().getBackStackEntryCount() < 2) {
            finish();
        }
        super.onBackPressed();
    }
}