ProductDetailActivity.java

package don.ctrl.wallpaperproject.ui.product;

import android.content.Intent;
import android.content.SharedPreferences;
import android.media.Image;
import android.preference.PreferenceManager;
import android.support.v4.view.ViewPager;
import android.os.Bundle;
import android.util.Log;
import android.view.MenuItem;
import android.view.View;
import android.widget.Button;
import android.widget.ImageButton;
import android.widget.TextView;

import java.util.ArrayList;

import don.ctrl.wallpaperproject.R;
import don.ctrl.wallpaperproject.adapter.ProductDetailAdapter;
import don.ctrl.wallpaperproject.model.ProductDetails;
import don.ctrl.wallpaperproject.services.ApiClient;
import don.ctrl.wallpaperproject.ui.BaseActivity;
import don.ctrl.wallpaperproject.ui.user.CartActivity;
import don.ctrl.wallpaperproject.utils.DatabaseHelper;
import don.ctrl.wallpaperproject.utils.PrefUtil;
import retrofit2.Call;
import retrofit2.Callback;
import retrofit2.Response;

public class ProductDetailActivity extends BaseActivity implements View.OnClickListener {
    private static final String TAG = ProductDetailActivity.class.getSimpleName();


    ApiClient apiClient;
    SharedPreferences sharedPreferences;
    private String getApiKey, getUserKey, id;
    private TextView tvName, tvPrice, tvDescription, tvTotal;
    private Button btnBuy;
    private Button btnShare;
    private ImageButton btnPlus;
    private ImageButton btnMinus;

    DatabaseHelper databaseHelper;

    private ViewPager viewPager;

    ProductDetailAdapter adapter;

    private int counter = 0;
    private int price;


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

        showBackArrow();
        setToolbarTitle("Detail Produk");
        /*showProgressDialog(ProductDetailActivity.this, "Mohon Tunggu");*/

        //get id from activity product list
        id = getIntent().getExtras().getString("id");

//        initialize database
        databaseHelper = new DatabaseHelper(this);

        getSharedPref();

        initViews();

        initData();
    }


    private void initViews() {


        tvName = (TextView) findViewById(R.id.tvName);
        tvPrice = (TextView) findViewById(R.id.tvPrice);
        tvDescription = (TextView) findViewById(R.id.tvDescription);
        tvTotal = (TextView) findViewById(R.id.tvJumlah);

        btnBuy = (Button) findViewById(R.id.btnBuyDetail);
        btnShare = (Button) findViewById(R.id.btnShare);
        btnPlus = (ImageButton) findViewById(R.id.btnPlus);
        btnMinus = (ImageButton) findViewById(R.id.btnMinus);
        btnBuy.setOnClickListener(this);
        btnShare.setOnClickListener(this);
        btnPlus.setOnClickListener(this);
        btnMinus.setOnClickListener(this);

        viewPager = (ViewPager) findViewById(R.id.vpDetail);


    }

    private void getSharedPref() {
        //set sharedpref
        sharedPreferences = PreferenceManager.getDefaultSharedPreferences(this);
        getApiKey = sharedPreferences.getString(PrefUtil.PREF_USER_API_KEY, "");
        getUserKey = sharedPreferences.getString(PrefUtil.PREF_USER_USER_KEY, "");
    }

    private void initData() {
        apiClient = new ApiClient();
        Call<ProductDetails> call = apiClient.getApiInterface().getProductDetail(getUserKey, getApiKey, id);
        call.enqueue(new Callback<ProductDetails>() {
            @Override
            public void onResponse(Call<ProductDetails> call, Response<ProductDetails> response) {
//                hideProgressDialog();

                ProductDetails products = response.body();
                if (products.getStatus()) {
                    ProductDetails.Datum productsData = products.getDatum();
                    tvName.setText(productsData.getNamaProduk());
                    tvPrice.setText("Rp. " + productsData.getHarga());
                    tvDescription.setText(productsData.getKatalog());




                    ArrayList<String> gambar = productsData.getGambar();
                    adapter = new ProductDetailAdapter(ProductDetailActivity.this, gambar);
                    viewPager.setAdapter(adapter);

                    //saving data to database
                    databaseHelper.insertData(
                            productsData.getKodeProduk(),
                            productsData.getNamaProduk(),
                            productsData.getHarga(),
                            productsData.getGambar().get(0));
                }
            }

            @Override
            public void onFailure(Call<ProductDetails> call, Throwable t) {
                // Log error here since request failed
                Log.e(TAG, t.toString());
//                hideProgressDialog();
            }
        });


    }


    private void goToCart() {
        Intent intent = new Intent(ProductDetailActivity.this, CartActivity.class);
        intent.putExtra("total_item", counter);
        startActivity(intent);
        finish();
    }

    private void share() {
        Intent sendIntent = new Intent();
        sendIntent.setAction(Intent.ACTION_SEND);
        sendIntent.putExtra(Intent.EXTRA_TEXT, "Saya baru saja membeli di Toko-Wallpaperdinding.com");
        sendIntent.setType("text/plain");
        startActivity(sendIntent);
    }

    private void setBtnPlus() {
        counter = counter + 1;
        tvTotal.setText(String.valueOf(counter));
    }

    private void setBtnMinus() {
        if (counter == 0) {
            tvTotal.setText("0");
        } else {
            counter = counter - 1;
            tvTotal.setText(String.valueOf(counter));
        }
    }

    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        switch (item.getItemId()) {
            case android.R.id.home:
                finish();
                break;
        }
        return true;
    }


    @Override
    public void onClick(View view) {
        switch (view.getId()) {
            case R.id.btnBuyDetail:
                goToCart();
                break;
            case R.id.btnShare:
                share();
                break;
            case R.id.btnPlus:
                setBtnPlus();
                break;
            case R.id.btnMinus:
                setBtnMinus();
                break;
        }
    }
}


<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:background="@color/light_grey"
    android:paddingBottom="@dimen/activity_vertical_margin"
    android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin"
    tools:context=".ui.product.ProductDetailActivity">

    <android.support.v4.view.ViewPager
        android:id="@+id/vpDetail"
        android:layout_width="@dimen/margin_266"
        android:layout_height="@dimen/margin_266"
        android:layout_alignParentTop="true"
        android:layout_centerHorizontal="true" />


    <!--<com.viewpagerindicator.CirclePageIndicator-->
    <!--android:id="@+id/indicator"-->
    <!--android:layout_width="@dimen/margin_266"-->
    <!--android:layout_height="wrap_content"-->
    <!--android:layout_alignBottom="@+id/vpDetail"-->
    <!--android:layout_centerHorizontal="true"-->
    <!--android:padding="10dip" />-->


    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_below="@+id/rlProductDetail"
        android:layout_marginTop="16dp"
        android:orientation="vertical">

        <TextView
            android:id="@+id/tvName"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="-"
            android:textSize="@dimen/text_20sp" />

        <TextView
            android:id="@+id/tvDescription"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_marginTop="18dp"
            android:text="-"
            android:textSize="@dimen/text_17sp" />
        <LinearLayout
            android:layout_gravity="left"
            android:layout_marginTop="@dimen/margin_10dp"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:gravity="center">

            <ImageButton
                android:id="@+id/btnMinus"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:background="@drawable/ic_remove" />

            <TextView
                android:text="1"
                android:id="@+id/tvJumlah"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_marginLeft="@dimen/margin_10dp"
                android:layout_marginRight="@dimen/margin_10dp"
                android:gravity="center" />

            <ImageButton
                android:id="@+id/btnPlus"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:background="@drawable/ic_add" />

        </LinearLayout>

    </LinearLayout>

    <Button
        android:id="@+id/btnBuyDetail"
        style="@style/Button.Default"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_alignParentBottom="true"
        android:layout_alignParentEnd="true"
        android:layout_alignParentRight="true"
        android:text="@string/buy" />

    <RelativeLayout
        android:id="@+id/rlProductDetail"
        android:layout_width="match_parent"
        android:layout_height="24dp"
        android:layout_marginTop="15dp"
        android:orientation="horizontal"
        android:layout_below="@+id/vpDetail"
        android:layout_alignParentLeft="true"
        android:layout_alignParentStart="true">


        <TextView
            android:id="@+id/tvPrice"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_centerVertical="true"
            android:layout_gravity="start"
            android:text="-" />


        <Button
            android:id="@+id/btnShare"
            style="@style/Button.Share"
            android:layout_width="90dp"
            android:layout_height="40dp"
            android:layout_alignParentEnd="true"
            android:layout_alignParentRight="true"
            android:layout_gravity="right"
            android:drawableRight="@drawable/ic_menu_share"
            android:text="Bagikan"
            android:textAllCaps="false"
            android:textSize="@dimen/text_11sp" />
    </RelativeLayout>
</RelativeLayout>