Uppkopplas till server

[agnestegner]

package com.example.myapplication;

import android.app.AlertDialog;
import android.app.DownloadManager;
import android.content.DialogInterface;
import android.content.Intent;
import android.os.Build;
import android.os.Parcelable;
import android.support.annotation.RequiresApi;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.Menu;
import android.view.MenuInflater;
import android.view.MenuItem;
import android.view.View;
import android.widget.AdapterView;
import android.widget.ArrayAdapter;
import android.widget.EditText;
import android.widget.ListView;

import com.android.volley.Request;
import com.android.volley.RequestQueue;
import com.android.volley.Response;
import com.android.volley.VolleyError;
import com.android.volley.toolbox.JsonArrayRequest;
import com.android.volley.toolbox.Volley;
import com.example.myapplication.domain.Product.Product;

import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;

import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

public class MainActivity extends AppCompatActivity {

    private static final String LOG_TAG = MainActivity.class.getSimpleName();
    private List<Product> products;
    private ListView listView;
    private ArrayAdapter<Product> adapter;

    private static final String MIN_ALCO = "min_alcohol";
    private static final String MAX_ALCO = "max_alcohol";
    private static final String MIN_PRICE = "min_price";
    private static final String MAX_PRICE = "max_price";
    private static final String TYPE = "product_group";
    private static final String NAME = "name";

    private void createFakedProducts() {
        products = new ArrayList<>();
        Product p1 = new Product.Builder()
                .alcohol(4.4)
                .name("Pilsner Urquell")
                .nr(1234)
                .productGroup("Öl")
                .type("Öl")
                .volume(330).build();
        Product p2 = new Product.Builder()
                .alcohol(4.4)
                .name("Baron Trenk")
                .nr(1234)
                .productGroup("Öl")
                .type("Öl")
                .volume(330).build();
        products.add(p1);
        products.add(p2);
    }

    private void setupListView() {
        // look up a reference to the ListView object
        listView = findViewById(R.id.product_list);

        // create an adapter (with the faked products)
        adapter = new ArrayAdapter<Product>(this,
                android.R.layout.simple_list_item_1,
                products);

        listView.setOnItemClickListener(new ListView.OnItemClickListener() {
            @Override
            public void onItemClick(AdapterView<?> parent,
                                    final View view,
                                    int position /*The position of the view in the adapter.*/,
                                    long id /* The row id of the item that was clicked */) {
                Log.d(LOG_TAG, "item clicked, pos:" + position + " id: " + id);

                Product p = products.get(position);
                Intent intent = new Intent(MainActivity.this, ProductActivity.class);
                intent.putExtra("product", (Parcelable) p);
                startActivity(intent);

            }
        });

        // Set listView's adapter to the new adapter
        listView.setAdapter(adapter);
    }

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        MenuInflater inflater = getMenuInflater();
        inflater.inflate(R.menu.actionbar_menu, menu);

        return true;
    }

    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        switch (item.getItemId()) {
            // action with ID action_refresh was selected
            case R.id.action_search:
                Log.d(LOG_TAG, "user presssed SEARCH");
                showSearchDialog();
                break;
            default:
                Log.d(LOG_TAG, "uh oh ;)");
                break;
        }
        return true;
    }

    // get the entered text from a view
    private String valueFromView(View inflated, int viewId) {
        return ((EditText) inflated.findViewById(viewId)).getText().toString();
    }

    // if the value is valid, add it to the map
    private void addToMap(Map<String, String> map, String key, String value) {
        if (value!=null && !value.equals("")) {
            map.put(key, value);
        }
    }

    private void showSearchDialog() {
        AlertDialog.Builder builder = new AlertDialog.Builder(this);
        builder.setTitle("Search products");
        final View viewInflated = LayoutInflater
                .from(this).inflate(R.layout.search_dialog, null);

        builder.setView(viewInflated);

        builder.setPositiveButton(android.R.string.ok, new DialogInterface.OnClickListener() {
            @Override
            public void onClick(DialogInterface dialog, int which) {
                dialog.dismiss();
                // Create a map to pass to the search method
                // The map makes it easy to add more search parameters with no changes in method signatures
                Map<String, String> arguments = new HashMap<>();

                // Add user supplied argument (if valid) to the map
                addToMap(arguments, MIN_ALCO, valueFromView(viewInflated, R.id.min_alco_input));
                addToMap(arguments, MAX_ALCO, valueFromView(viewInflated, R.id.max_alco_input));
                addToMap(arguments, MIN_PRICE, valueFromView(viewInflated, R.id.min_price_input));
                addToMap(arguments, MAX_PRICE, valueFromView(viewInflated, R.id.max_price_input));

                // Given the map, s earch for products and update the listview
                searchProducts(arguments);
            }
        });
        builder.setNegativeButton(android.R.string.cancel, new DialogInterface.OnClickListener() {
            @Override
            public void onClick(DialogInterface dialog, int which) {
                Log.d(LOG_TAG, " User cancelled search");
                dialog.cancel();
            }
        });
        builder.show();
    }

    private void searchProducts(Map<String, String> arguments) {
        // empty search string will give a lot of products :)
        String argumentString = "";

        // iterate over the map and build up a string to pass over the network
        for (Map.Entry<String, String> entry : arguments.entrySet())
        {
            // If first arg use "?", otherwise use "&"
            // E g:    ?min_alcohol=4.4&max_alcohol=5.4
            argumentString += (argumentString.equals("")?"?":"&")
                    + entry.getKey()
                    + "="
                    + entry.getValue();
        }
        // print argument
        Log.d(LOG_TAG, " arguments: " + argumentString);

        RequestQueue queue = Volley.newRequestQueue(this);
        String url = "http://rameau.sandklef.com:9090/search/products/all/" + argumentString;
        Log.d(LOG_TAG, "Searching using url: " + url);
        JsonArrayRequest jsonArrayRequest = new JsonArrayRequest(
                Request.Method.GET,
                url,
                null,
                new Response.Listener<JSONArray>() {

                    @RequiresApi(api = Build.VERSION_CODES.N)
                    @Override
                    public void onResponse(JSONArray array) {
                        Log.d(LOG_TAG, "onResponse()");
                        products.clear();
                        products.addAll(jsonToProducts(array));
                        adapter.notifyDataSetChanged();
                    }
                }, new Response.ErrorListener() {

            @Override
            public void onErrorResponse(VolleyError error) {
                Log.d(LOG_TAG, " cause: " + error.getCause().getMessage());
            }
        });

        // Add the request to the RequestQueue.
        queue.add(jsonArrayRequest);
    }

    @RequiresApi(api = Build.VERSION_CODES.N)
    private List<Product> jsonToProducts(JSONArray array) {
        Log.d(LOG_TAG, "jsonToProducts()");
        List<Product> productList = new ArrayList<>();
        for (int i = 0; i < array.length(); i++) {
            try {
                JSONObject row = array.getJSONObject(i);
                String name = row.getString("name");
                double alcohol = row.getDouble("alcohol");
                double price = row.getDouble("price");
                int volume = row.getInt("volume");

                Product m = new Product(name, alcohol, price, volume);
                productList .add(m);
                Log.d(LOG_TAG, " * " + m);
            } catch (JSONException e) {
                ; // is ok since this is debug
            }
        }
        return productList;
    }

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

        // set up faked products
        createFakedProducts();

        // setup listview (and friends)
        setupListView();
    }
}

[agnestegner]

lägga till kod i manifest för att få koppling till servern

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.example.myapplication">

    <uses-permission android:name="android.permission.INTERNET" />
    <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />

    <application
        android:allowBackup="true"
        android:icon="@mipmap/ic_launcher"
        android:label="@string/app_name"
        android:roundIcon="@mipmap/ic_launcher_round"
        android:supportsRtl="true"
        android:theme="@style/AppTheme">
        <activity android:name=".Age">
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
        <activity android:name=".MainActivity">
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
        <activity android:name=".ProductActivity" />
    </application>

</manifest>

[agnestegner]

kod hur produkterna visas

package com.example.myapplication;

import android.os.Build;
import android.os.Bundle;
import android.support.annotation.RequiresApi;
import android.support.v7.app.AppCompatActivity;
import android.text.Html;
import android.util.Log;
import android.widget.TextView;

import com.example.myapplication.domain.Product.Product;

class ProductActivity extends AppCompatActivity {

    private static final String LOG_TAG = ProductActivity.class.getSimpleName();

    @RequiresApi(api = Build.VERSION_CODES.N)
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.product_activity);

        // extract the Product pass in the bundle
        Bundle extras = getIntent().getExtras();
        Product p = (Product) extras.get("product");
        // display the product
        displayProduct(p);
    }

    private void setViewText(int viewId, String label, String text) {
        TextView tv = findViewById(viewId);
        tv.setText(Html.fromHtml("<b>"+label+"</b>: " + text));
        Log.d(LOG_TAG, " * " + label + " | " + text);
    }

    @RequiresApi(api = Build.VERSION_CODES.N)
    private void displayProduct(Product product) {
        setViewText(R.id.product_name, "Name", product.name());
        setViewText(R.id.product_volume, "Volume", String.valueOf(product.volume()));
        setViewText(R.id.product_alcohol, "Alcohol", String.valueOf(product.alcohol()));
        setViewText(R.id.product_price, "Price", String.valueOf(product.price()));
    }

}

[agnestegner]

product activity xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical" android:layout_width="match_parent"
    android:layout_height="match_parent">

    <TextView
        android:id="@+id/product_name"
        android:layout_width="match_parent"
        android:layout_height="wrap_content" />

    <TextView
        android:id="@+id/product_volume"
        android:layout_width="match_parent"
        android:layout_height="wrap_content" />

    <TextView
        android:id="@+id/product_price"
        android:layout_width="match_parent"
        android:layout_height="wrap_content" />

    <TextView
        android:id="@+id/product_alcohol"
        android:layout_width="match_parent"
        android:layout_height="wrap_content" />

</LinearLayout>

[agnestegner]

Main activity xml

<?xml version="1.0" encoding="utf-8"?>
<android.support.constraint.ConstraintLayout 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"
    tools:context=".MainActivity">

    <ListView
        android:id="@+id/product_list"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent"></ListView>

</android.support.constraint.ConstraintLayout>