public class MainActivity extends AppCompatActivity implements View.OnClickListener {

    @BindView(R.id.et_address)

    EditText mETAddress;

    @BindView(R.id.bt_search)

    Button mBTSearch;

    @BindView(R.id.tv_result)

    TextView mTVResult;

    @BindView(R.id.pb_status)

    ProgressBar mPBStatus;

    @Override

    protected void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

        setContentView(R.layout.activity_main);

        ButterKnife.bind(this);

        mBTSearch.setOnClickListener(this);

    }

    @Override

    public void onClick(View v) {

        switch (v.getId()) {

            case R.id.bt_search:

                onSearchButtonClick(mETAddress.getText().toString());

                break;

        }

    }

    private void onSearchButtonClick(String address) {

        mPBStatus.setVisibility(View.VISIBLE);

        mTVResult.setText("");

        Utility.getAddressResponseModel(this, address, new IGetAddressInfo() {

            @Override

            public void onResponse(double latitude, double longitude) {

                mPBStatus.setVisibility(View.GONE);

                //mTVResult.setText("Latitude and longitude is "+latitude+", "+longitude);

                mTVResult.setText("Latitude and longitude is "+"17.23"+", 78.27 ");

            }

        });

    }

}

public class Utility {

    public static ServiceOperations getService(Context ctx, String url){

        return RetroHelper.getAdapter(ctx,url).create(ServiceOperations.class);

    }

    public static void getAddressResponseModel(final Context context, String address, final IGetAddressInfo getAddressInfo){

        final Call<AddressResponseModel> responseModelCall = getService(context, "")

                .getAddressResponse(address, true, IAppConstants.API_KEY);

        responseModelCall.enqueue(new Callback<AddressResponseModel>() {

            @Override

            public void onResponse(Call<AddressResponseModel> call, Response<AddressResponseModel> response) {

                if (response.isSuccessful()) {

                    AddressResponseModel addressResponseModel = response.body();

                    if (addressResponseModel != null && addressResponseModel.getResults() != null) {

                        if (addressResponseModel.getResults().size() > 0) {

                            double latitude = addressResponseModel.getResults().get(0).getGeometry().getLocation().getLat();

                            double longitude = addressResponseModel.getResults().get(0).getGeometry().getLocation().getLng();

                            getAddressInfo.onResponse(latitude, longitude);

                        } else {

                            getAddressInfo.onResponse(0, 0);

                        }

                    }

                }

            }

            @Override

            public void onFailure(Call<AddressResponseModel> call, Throwable t) {

                Toast.makeText(context, "Error "+t.getMessage(), Toast.LENGTH_SHORT).show();

                getAddressInfo.onResponse(0, 0);

            }

        });

    }

}

public class RetroHelper {

    public static Retrofit getAdapter(Context ctx, String serverUrl) {

        Gson gson = new Gson();

        return new Retrofit.Builder()

                .baseUrl(BASE_URL + serverUrl)

                .addConverterFactory(GsonConverterFactory.create(gson))

                .build();

    }

}

public interface ServiceOperations {

    @GET("json")

    Call<AddressResponseModel> getAddressResponse(@Query("address") String address, @Query("sensor") boolean sensor,

                                                  @Query("key") String key);

}