prebuilts/gradle/WearDrawers/Wearable/src/main/java/com/example/android/wearable/wear/weardrawers/MainActivity.java

/*
Copyright 2016 The Android Open Source Project

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.example.android.wearable.wear.weardrawers;

import android.app.Fragment;
import android.app.FragmentManager;
import android.content.Context;
import android.graphics.drawable.Drawable;
import android.os.Bundle;
import android.support.wearable.activity.WearableActivity;
import android.support.wearable.view.drawer.WearableActionDrawer;
import android.support.wearable.view.drawer.WearableDrawerLayout;
import android.support.wearable.view.drawer.WearableNavigationDrawer;
import android.util.Log;
import android.view.Gravity;
import android.view.LayoutInflater;
import android.view.Menu;
import android.view.MenuInflater;
import android.view.MenuItem;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ImageView;
import android.widget.Toast;

import java.util.ArrayList;

/**
 * Demonstrates use of Navigation and Action Drawers on Android Wear.
 */
public class MainActivity extends WearableActivity implements
        WearableActionDrawer.OnMenuItemClickListener {

    private static final String TAG = "MainActivity";

    private WearableDrawerLayout mWearableDrawerLayout;
    private WearableNavigationDrawer mWearableNavigationDrawer;
    private WearableActionDrawer mWearableActionDrawer;

    private ArrayList<Planet> mSolarSystem;
    private int mSelectedPlanet;

    private PlanetFragment mPlanetFragment;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        Log.d(TAG, "onCreate()");

        setContentView(R.layout.activity_main);
        setAmbientEnabled();

        mSolarSystem = initializeSolarSystem();
        mSelectedPlanet = 0;

        // Initialize content to first planet.
        mPlanetFragment = new PlanetFragment();
        Bundle args = new Bundle();

        int imageId = getResources().getIdentifier(mSolarSystem.get(mSelectedPlanet).getImage(),
                "drawable", getPackageName());


        args.putInt(PlanetFragment.ARG_PLANET_IMAGE_ID, imageId);
        mPlanetFragment.setArguments(args);
        FragmentManager fragmentManager = getFragmentManager();
        fragmentManager.beginTransaction().replace(R.id.content_frame, mPlanetFragment).commit();

        // Main Wearable Drawer Layout that wraps all content
        mWearableDrawerLayout = (WearableDrawerLayout) findViewById(R.id.drawer_layout);

        // Top Navigation Drawer
        mWearableNavigationDrawer =
                (WearableNavigationDrawer) findViewById(R.id.top_navigation_drawer);
        mWearableNavigationDrawer.setAdapter(new NavigationAdapter(this));

        // Peeks Navigation drawer on the top.
        mWearableDrawerLayout.peekDrawer(Gravity.TOP);

        // Bottom Action Drawer
        mWearableActionDrawer =
                (WearableActionDrawer) findViewById(R.id.bottom_action_drawer);

        mWearableActionDrawer.setOnMenuItemClickListener(this);

        // Peeks action drawer on the bottom.
        mWearableDrawerLayout.peekDrawer(Gravity.BOTTOM);

        /* Action Drawer Tip: If you only have a single action for your Action Drawer, you can use a
         * (custom) View to peek on top of the content by calling
         * mWearableActionDrawer.setPeekContent(View). Make sure you set a click listener to handle
         * a user clicking on your View.
         */
    }

    private ArrayList<Planet> initializeSolarSystem() {
        ArrayList<Planet> solarSystem = new ArrayList<Planet>();
        String[] planetArrayNames = getResources().getStringArray(R.array.planets_array_names);

        for (int i = 0; i < planetArrayNames.length; i++) {
            String planet = planetArrayNames[i];
            int planetResourceId =
                    getResources().getIdentifier(planet, "array", getPackageName());
            String[] planetInformation = getResources().getStringArray(planetResourceId);

            solarSystem.add(new Planet(
                    planetInformation[0],   // Name
                    planetInformation[1],   // Navigation icon
                    planetInformation[2],   // Image icon
                    planetInformation[3],   // Moons
                    planetInformation[4],   // Volume
                    planetInformation[5])); // Surface area
        }

        return solarSystem;
    }

    @Override
    public boolean onMenuItemClick(MenuItem menuItem) {
        Log.d(TAG, "onMenuItemClick(): " + menuItem);

        final int itemId = menuItem.getItemId();

        String toastMessage = "";

        switch (itemId) {
            case R.id.menu_planet_name:
                toastMessage = mSolarSystem.get(mSelectedPlanet).getName();
                break;
            case R.id.menu_number_of_moons:
                toastMessage = mSolarSystem.get(mSelectedPlanet).getMoons();
                break;
            case R.id.menu_volume:
                toastMessage = mSolarSystem.get(mSelectedPlanet).getVolume();
                break;
            case R.id.menu_surface_area:
                toastMessage = mSolarSystem.get(mSelectedPlanet).getSurfaceArea();
                break;
        }

        mWearableDrawerLayout.closeDrawer(mWearableActionDrawer);

        if (toastMessage.length() > 0) {
            Toast toast = Toast.makeText(
                    getApplicationContext(),
                    toastMessage,
                    Toast.LENGTH_SHORT);
            toast.show();
            return true;
        } else {
            return false;
        }
    }

    private final class NavigationAdapter
            extends WearableNavigationDrawer.WearableNavigationDrawerAdapter {

        private final Context mContext;

        public NavigationAdapter(Context context) {
            mContext = context;
        }

        @Override
        public int getCount() {
            return mSolarSystem.size();
        }

        @Override
        public void onItemSelected(int position) {
            Log.d(TAG, "WearableNavigationDrawerAdapter.onItemSelected(): " + position);
            mSelectedPlanet = position;

            String selectedPlanetImage = mSolarSystem.get(mSelectedPlanet).getImage();
            int drawableId =
                    getResources().getIdentifier(selectedPlanetImage, "drawable", getPackageName());
            mPlanetFragment.updatePlanet(drawableId);
        }

        @Override
        public String getItemText(int pos) {
            return mSolarSystem.get(pos).getName();
        }

        @Override
        public Drawable getItemDrawable(int pos) {
            String navigationIcon = mSolarSystem.get(pos).getNavigationIcon();

            int drawableNavigationIconId =
                    getResources().getIdentifier(navigationIcon, "drawable", getPackageName());

            return mContext.getDrawable(drawableNavigationIconId);
        }
    }

    /**
     * Fragment that appears in the "content_frame", just shows the currently selected planet.
     */
    public static class PlanetFragment extends Fragment {
        public static final String ARG_PLANET_IMAGE_ID = "planet_image_id";

        private ImageView mImageView;

        public PlanetFragment() {
            // Empty constructor required for fragment subclasses
        }

        @Override
        public View onCreateView(LayoutInflater inflater, ViewGroup container,
                                 Bundle savedInstanceState) {
            View rootView = inflater.inflate(R.layout.fragment_planet, container, false);

            mImageView = ((ImageView) rootView.findViewById(R.id.image));

            int imageIdToLoad = getArguments().getInt(ARG_PLANET_IMAGE_ID);
            mImageView.setImageResource(imageIdToLoad);

            return rootView;
        }

        public void updatePlanet(int imageId) {
            mImageView.setImageResource(imageId);
        }
    }
}