GlassTesla/app/src/main/java/haus/nightmare/GlassTesla/MainActivity.java

package haus.nightmare.GlassTesla;

import com.google.android.glass.media.Sounds;
import com.google.android.glass.widget.CardBuilder;
import com.google.android.glass.widget.CardScrollAdapter;
import com.google.android.glass.widget.CardScrollView;
import com.google.gson.Gson;

import android.app.Activity;
import android.content.Context;
import android.content.SharedPreferences;
import android.media.AudioManager;
import android.os.Bundle;
import android.os.StrictMode;
import android.util.Log;
import android.view.View;
import android.view.ViewGroup;
import android.widget.AdapterView;

import org.conscrypt.Conscrypt;

import java.net.URL;
import java.security.Security;
import java.text.SimpleDateFormat;
import java.util.Calendar;

import javax.net.ssl.SSLException;

import okhttp3.OkHttpClient;
import okhttp3.Request;
import okhttp3.Response;


public class MainActivity extends Activity {

    private CardScrollView cardScroller;

    private View view;
    private TeslaResponse vehicleData;
    private SharedPreferences prefs;
    @Override
    protected void onCreate(Bundle bundle) {
        super.onCreate(bundle);
        StrictMode.ThreadPolicy policy = new StrictMode.ThreadPolicy.Builder().permitAll().build();
        StrictMode.setThreadPolicy(policy);
        prefs = getPreferences(MODE_PRIVATE);
        view = buildStatusView();
        view.setKeepScreenOn(true);
        cardScroller = new CardScrollView(this);
        cardScroller.setAdapter(new CardScrollAdapter() {
            @Override
            public int getCount() {
                return 1;
            }

            @Override
            public Object getItem(int position) {
                return view;
            }

            @Override
            public View getView(int position, View convertView, ViewGroup parent) {
                return view;
            }

            @Override
            public int getPosition(Object item) {
                if (view.equals(item)) {
                    return 0;
                }
                return AdapterView.INVALID_POSITION;
            }
        });

        cardScroller.setOnItemClickListener(new AdapterView.OnItemClickListener() {
            @Override
            public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
                AudioManager am = (AudioManager) getSystemService(Context.AUDIO_SERVICE);
                am.playSoundEffect(Sounds.TAP);

            }
        });
        setContentView(cardScroller);
    }

    @Override
    protected void onResume() {
        super.onResume();
        cardScroller.activate();
    }

    @Override
    protected void onPause() {
        cardScroller.deactivate();
        super.onPause();
    }

    private View buildStatusView() {
        if (vehicleData == null) {
            try {
                getVehicleData();
            } catch(Exception e) {
                Log.v("Tesla API Setup", "Unable to get Tesla data", e);
                this.finishAffinity();
                System.exit(0); // Shouldn't be reached, but just in case let's kill it dead
            }
        }

        CardBuilder card = new CardBuilder(this, CardBuilder.Layout.TEXT);
        String chargeDuration = "";
        int totalSecs = (int) (vehicleData.charge_state.time_to_full_charge * 3600);
        int hours = totalSecs / 3600;
        int minutes = (totalSecs % 3600) / 60;
        if (hours > 0) {
            chargeDuration += hours + "h";
        }
        if (minutes > 0) {
            chargeDuration += minutes + "m";
        }
        Calendar cal = Calendar.getInstance();
        cal.add(Calendar.HOUR_OF_DAY, hours);
        cal.add(Calendar.MINUTE, minutes);
        card.setText(
                String.format(getString(R.string.StatusFormat),
                        vehicleData.charge_state.battery_level,
                        (int) vehicleData.charge_state.battery_range,
                        vehicleData.vehicle_state.sentry_mode ? "Enabled" : "Disabled",
                        vehicleData.charge_state.charging_state,
                        vehicleData.charge_state.charger_power,
                        chargeDuration,
                        new SimpleDateFormat("hh:mm").format(cal.getTime())
                )
        );
        card.setFootnote(String.format("%s last updated: %s",
                vehicleData.display_name,
                new SimpleDateFormat("hh:mm").format(vehicleData.charge_state.timestamp)
                ));

        return card.getView();
    }

   // /api/1/vehicles/{id}/vehicle_data
    public void getVehicleData() {
        String vehicleId = prefs.getString("vehicle_id", "");
        String json = getResponseFromJsonURL("https://owner-api.teslamotors.com/api/1/vehicles/" + vehicleId +"/vehicle_data");
        Gson gson = new Gson();
        ResponseRoot root = gson.fromJson(json, ResponseRoot.class);
        vehicleData = root.response;
    }
    public String getResponseFromJsonURL(String url) {
        String token = prefs.getString("bearer_token", "");

        String jsonResponse = null;
        if (url.length() > 0) {
            try {
                Security.insertProviderAt(Conscrypt.newProvider(), 1);



                /************** For getting response from HTTP URL start ***************/
                URL object = new URL(url);

                OkHttpClient client = new OkHttpClient();
                Request request = new Request.Builder()
                        .url(object)
                        .addHeader("Authorization", "Bearer " + token)
                        .addHeader("User-Agent", "Tesla-GLASS")
                        .addHeader("Content-Type", "application/json")
                        .build();

                Response response = client.newCall(request).execute();

                int responseCode = response.code();

                if (responseCode == 200) {
                    return response.body().string();

                }
            } catch (SSLException e) {
              Log.e("DataSSL", "SSL Exception getting json:", e);
            } catch (Exception e) {
                e.printStackTrace();
            }
        }
        return jsonResponse;
    }

}