mMDT5_PR_MSY1_Gruppe1/app/src/main/java/de/edotzlaff/schockwelle/MainActivity.java

package de.edotzlaff.schockwelle;

import androidx.appcompat.app.AppCompatActivity;
import androidx.fragment.app.FragmentActivity;

import android.app.Dialog;
import android.content.Intent;
import android.hardware.Sensor;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.widget.Button;
import android.widget.Toast;

import com.google.android.gms.common.ConnectionResult;
import com.google.android.gms.common.GoogleApiAvailability;

public class MainActivity extends FragmentActivity {

    private static final String TAG = "MainActivity";
    private static final int ERROR_DIALOG_REQUEST = 9001;



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

        if (isServiceOK()){
            init();
        }
    }

    private void init(){

        Button btnEarthquake = (Button) findViewById(R.id.btnEarthquake);
        btnEarthquake.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                Intent intent = new Intent(MainActivity.this, EarthquakeMapsActivity.class);
                startActivity(intent);
            }
        });

        Button btnSensor = (Button) findViewById(R.id.btnSensor);
        btnSensor.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                Intent intent = new Intent(MainActivity.this, SensorMapsActivity.class);
                startActivity(intent);
            }
        });


    }


    public boolean isServiceOK(){
        Log.d(TAG, "isServicesOK(): checking google services version");

        int available = GoogleApiAvailability.getInstance().isGooglePlayServicesAvailable(MainActivity.this);

        if (available== ConnectionResult.SUCCESS){
            Log.d(TAG,"isServicesOK: Google Play Services is working");
            return true;
        }
        else if (GoogleApiAvailability.getInstance().isUserResolvableError(available)){
            Log.d(TAG, "isServicesOK(): an error occured but we can fix it");
            Dialog dialog = GoogleApiAvailability.getInstance().getErrorDialog(MainActivity.this, available, ERROR_DIALOG_REQUEST);
            dialog.show();
        }
        else {
            Toast.makeText(this, "You can`t make map request", Toast.LENGTH_SHORT).show();
        }
        return false;
    }
}