org.randoomz.learnit.ui.MainActivity.java Source code

Introduction

Here is the source code for org.randoomz.learnit.ui.MainActivity.java

Source

package org.randoomz.learnit.ui;

import android.content.DialogInterface;
import android.os.Bundle;
import android.os.PersistableBundle;
import android.support.design.widget.NavigationView;
import android.support.v4.view.GravityCompat;
import android.support.v4.widget.DrawerLayout;
import android.support.v7.app.AlertDialog;
import android.support.v7.app.AppCompatActivity;
import android.view.LayoutInflater;
import android.view.Menu;
import android.view.MenuInflater;
import android.view.MenuItem;
import android.view.SubMenu;
import android.view.View;
import android.widget.EditText;

import com.squareup.sqlbrite.SqlBrite;

import org.randoomz.learnit.MyApp;
import org.randoomz.learnit.R;
import org.randoomz.learnit.database.Language;
import org.randoomz.learnit.database.Vocabulary;

import java.util.Collections;
import java.util.List;

import javax.inject.Inject;

import de.psdev.licensesdialog.LicensesDialog;
import rx.Subscription;
import rx.android.schedulers.AndroidSchedulers;
import rx.functions.Action1;
import rx.schedulers.Schedulers;

public class MainActivity extends AppCompatActivity implements NavigationView.OnNavigationItemSelectedListener {
    public static final String CURRENT_LANGUAGE = "current_pos";

    private List<Language> languages = Collections.emptyList();
    private int currentPosition = 0;

    private LanguageSelectedListener listener;
    private Subscription subscribe;

    private DrawerLayout drawerLayout;
    private NavigationView navigationView;

    @Inject
    SqlBrite db;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        MyApp.objectGraph(this).inject(this);
        setContentView(R.layout.activity_main);

        drawerLayout = (DrawerLayout) findViewById(R.id.drawer_layout);

        if (savedInstanceState == null) {
            MainActivityFragment fragment = MainActivityFragment.newInstance();
            getSupportFragmentManager().beginTransaction().add(R.id.content, fragment).commit();
        }

        navigationView = (NavigationView) findViewById(R.id.nav_view);
        if (navigationView != null) {
            navigationView.setNavigationItemSelectedListener(this);
        }
    }

    @Override
    protected void onResume() {
        super.onResume();
        subscribe = db.createQuery(Language.TABLE, Language.ALL_QUERY).map(Language.MAP)
                .subscribeOn(Schedulers.io()).observeOn(AndroidSchedulers.mainThread())
                .subscribe(new Action1<List<Language>>() {
                    @Override
                    public void call(List<Language> languages) {
                        MainActivity.this.languages = languages;
                        final MenuItem item = navigationView.getMenu().findItem(R.id.languages);
                        final SubMenu subMenuLanguages = item.getSubMenu();
                        subMenuLanguages.clear();
                        for (int i = 0; i < languages.size(); i++) {
                            subMenuLanguages.add(Menu.NONE, i, i, languages.get(i).language()).setCheckable(true);
                        }
                        onNavigationItemSelected(subMenuLanguages.getItem(currentPosition));
                    }
                });
    }

    @Override
    protected void onPause() {
        super.onPause();
        subscribe.unsubscribe();
    }

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        MenuInflater inflater = getMenuInflater();
        inflater.inflate(R.menu.activity_main, menu);
        return true;
    }

    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        switch (item.getItemId()) {
        case android.R.id.home:
            drawerLayout.openDrawer(GravityCompat.START);
            return true;
        case R.id.remove:
            if (currentPosition < 0) {
                return false;
            }
            final String language = languages.get(currentPosition).language();
            db.delete(Vocabulary.TABLE, Vocabulary.LANG_TRANSLATED + " = ?", language);
            db.delete(Language.TABLE, Language.LANGUAGE + " = ?", language);
            currentPosition = 0;
            return true;
        }
        return super.onOptionsItemSelected(item);
    }

    @Override
    public boolean onNavigationItemSelected(MenuItem menuItem) {
        switch (menuItem.getItemId()) {
        case R.id.new_language:
            final LayoutInflater layoutInflater = getLayoutInflater();
            final View inflate = layoutInflater.inflate(R.layout.dialog_new_language, null);
            final EditText etLanguage = (EditText) inflate.findViewById(R.id.et_language);
            new AlertDialog.Builder(this).setTitle(R.string.new_language).setView(inflate)
                    .setPositiveButton(R.string.confirm, new DialogInterface.OnClickListener() {
                        @Override
                        public void onClick(DialogInterface dialog, int which) {
                            currentPosition = languages.size();
                            db.insert(Language.TABLE, new Language.Builder()
                                    .language(etLanguage.getText().toString().trim()).build());
                        }
                    }).setNegativeButton(R.string.cancel, null).show();
            break;
        case R.id.license:
            new LicensesDialog.Builder(this).setNotices(R.raw.notices).build().show();
            break;
        default:
            if (listener != null) {
                this.currentPosition = menuItem.getItemId();
                listener.onLanguageSelected(this.languages.get(this.currentPosition));
            }
        }
        drawerLayout.closeDrawers();
        return true;
    }

    public void setLanguageSelectedListener(LanguageSelectedListener listener) {
        this.listener = listener;
    }

    interface LanguageSelectedListener {
        void onLanguageSelected(Language current);
    }

    @Override
    public void onSaveInstanceState(Bundle outState, PersistableBundle outPersistentState) {
        super.onSaveInstanceState(outState, outPersistentState);
        outState.putInt(CURRENT_LANGUAGE, currentPosition);
    }

    @Override
    protected void onRestoreInstanceState(Bundle savedInstanceState) {
        super.onRestoreInstanceState(savedInstanceState);
        if (savedInstanceState != null) {
            currentPosition = savedInstanceState.getInt(CURRENT_LANGUAGE);
        }
    }
}