Build a recipe app using Android studio. The Data used for recipes should be in

Question

Build a recipe app using Android studio. The Data used for recipes should be in the arrays in string.xml file! On start the app should show a list of recipes. Each row consists of 2 parts. The left is a small icon to show the food, and the right is the recipe name. Tap the image a new screen should be launched with a high resolution image of the icon. Tap the high resolution image to traverse back to the main list. Tap recipe name to show 1 sentence description about the food. should be able to go back using back button. should work on Android marshmallow and up.

Explanation / Answer

I made full application there so many class

package com.app.recipeapp;

import android.app.ListActivity;
import android.content.Context;
import android.content.Intent;
import android.content.res.Resources;
import android.content.res.TypedArray;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.AdapterView;
import android.widget.ListView;

import java.util.ArrayList;
import java.util.List;

public class MainActivity extends AppCompatActivity {

    private ListView mListView;

    List<Recipe> recipesItems;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        Context ctx = getApplicationContext();
        Resources res = ctx.getResources();

        String[] recipeList = res.getStringArray(R.array.recipe_names);
        Integer[] recipeIcons = {R.drawable.hunan_chicken,R.drawable.minty_ice_cream,R.drawable.jam_filled_cookies,R.drawable.veggie_hoagie};

        recipesItems = new ArrayList<Recipe>();
        for (int i = 0; i < recipeList.length; i++) {
            Recipe item = new Recipe(recipeIcons[i], recipeList[i]);
            recipesItems.add(item);
        }

        // Create list view
        mListView = (ListView) findViewById(R.id.recipe_list_view);

        RecipeAdapter recipeAdapter = new RecipeAdapter(this, R.layout.list_item_recipe, recipesItems);
        mListView.setAdapter(recipeAdapter);

    }
}

2.Recipe.java

package com.app.recipeapp;

/**
* Created by developer on 20/3/17.
*/

public class Recipe {
    private int imageId;
    private String title;

    public Recipe(int imageId, String title) {
        this.imageId = imageId;
        this.title = title;
    }

    public int getImageId() {
        return imageId;
    }

    public void setImageId(int imageId) {
        this.imageId = imageId;
    }

    public String getTitle() {
        return title;
    }

    public void setTitle(String title) {
        this.title = title;
    }
}

3. RecipeAdapter.java

package com.app.recipeapp;

import android.app.Activity;
import android.content.Context;
import android.content.Intent;
import android.content.res.TypedArray;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ArrayAdapter;
import android.widget.ImageView;
import android.widget.TextView;

import java.util.List;

/**
* Created by developer on 20/3/17.
*/

public class RecipeAdapter extends ArrayAdapter<Recipe> {

    Context context;

    public RecipeAdapter(Context context, int resourceId, List<Recipe> items) {
        super(context, resourceId, items);
        this.context = context;
    }

    /*private view holder class*/
    private class ViewHolder {
        ImageView imageView;
        TextView txtTitle;
    }

    public View getView(int position, View convertView, ViewGroup parent) {
        ViewHolder holder = null;
        Recipe recipe = getItem(position);

        LayoutInflater mInflater = (LayoutInflater) context
                .getSystemService(Activity.LAYOUT_INFLATER_SERVICE);
        if (convertView == null) {
            convertView = mInflater.inflate(R.layout.list_item_recipe, null);
            holder = new ViewHolder();
            holder.txtTitle = (TextView) convertView.findViewById(R.id.recipe_list_title);
            holder.imageView = (ImageView) convertView.findViewById(R.id.recipe_list_thumbnail);
            convertView.setTag(holder);
        } else
            holder = (ViewHolder) convertView.getTag();

        holder.txtTitle.setText(recipe.getTitle());
        final String recipeDesc = recipe.getTitle();
        holder.imageView.setImageResource(recipe.getImageId());
        final int imageID = recipe.getImageId();
        holder.txtTitle.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                Intent detailIntent = new Intent(context, RecipeDescriptionActivity.class);
                detailIntent.putExtra("recipe",recipeDesc);
                context.startActivity(detailIntent);
            }
        });

        holder.imageView.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                Intent detailIntent = new Intent(context, RecipeDetailActivity.class);
                detailIntent.putExtra("imageID",imageID);
                context.startActivity(detailIntent);
            }
        });

        return convertView;
    }

}

4.RecipeDescriptionActivity.java

package com.app.recipeapp;

import android.content.Intent;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.TextView;

public class RecipeDescriptionActivity extends AppCompatActivity {

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

        TextView description = (TextView) findViewById(R.id.recipe_description);
        TextView back = (TextView) findViewById(R.id.back);

        Intent intent = getIntent();
        description.setText(intent.getStringExtra("recipe"));

        back.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                Intent intentBack = new Intent(RecipeDescriptionActivity.this,MainActivity.class);
                startActivity(intentBack);
            }
        });
    }
}

5.RecipeDetailActivity.java

package com.app.recipeapp;

import android.content.Intent;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.ImageView;

public class RecipeDetailActivity extends AppCompatActivity {

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

        imageView = (ImageView) findViewById(R.id.recipe_image);

        Intent intent = getIntent();
        int imageName = Integer.valueOf(intent.getIntExtra("imageID",0));
        imageView.setImageResource(imageName);

        imageView.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                Intent intentBack = new Intent(RecipeDetailActivity.this,MainActivity.class);
                startActivity(intentBack);
            }
        });
    }
}

6.activity_main.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="com.app.recipeapp.MainActivity">

    <ListView
        android:id="@+id/recipe_list_view"
        android:layout_height="match_parent"
        android:layout_width="match_parent">
    </ListView>

</android.support.constraint.ConstraintLayout>

7. activity_recipe_description.xml

<?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"
    tools:context="com.app.recipeapp.RecipeDescriptionActivity">

    <TextView
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:id="@+id/recipe_description"
        android:padding="10dp"
        android:layout_centerHorizontal="true"
        android:gravity="center_horizontal"
        android:text="recipe" />

        <TextView
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:id="@+id/back"
            android:padding="10dp"
            android:layout_below="@+id/recipe_description"
            android:layout_centerHorizontal="true"
            android:gravity="center_horizontal"
            android:textSize="20dp"
            android:text="Back" />
</RelativeLayout>

8.activity_recipe_detail.xml

<?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"
    tools:context="com.app.recipeapp.RecipeDetailActivity">

    <ImageView
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:id="@+id/recipe_image" />

</RelativeLayout>

9.list_item_recipe.xml

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

<ImageView
      android:id="@+id/recipe_list_thumbnail"
      android:layout_width="90dp"
      android:layout_height="90dp"
      android:layout_alignParentStart="true"
      android:layout_centerVertical="true"
      android:layout_marginBottom="6dp"
      android:layout_marginStart="4dp"
      android:layout_marginTop="6dp"
      android:scaleType="centerInside"
      tools:src="@mipmap/ic_launcher"
      android:contentDescription="@string/thumbnail"/>

<TextView
      android:id="@+id/recipe_list_title"
      android:layout_width="wrap_content"
      android:layout_height="wrap_content"
      android:gravity="right"
      android:maxLines="1"
      android:textColor="#000000"
      android:padding="10dp"
      android:textSize="20sp"
      tools:text="Detail"
      android:layout_centerVertical="true"
      android:layout_toEndOf="@+id/recipe_list_thumbnail" />

</RelativeLayout>

10.string.xml

<resources>
    <string name="app_name">RecipeApp</string>
    <string name="thumbnail">thumbnail</string>

    <string-array name="recipe_names">
        <item>Hunan Style Chicken</item>
        <item>Minty Ice Cream Shamrocks</item>
        <item>Jam-Filled Cookies</item>
        <item>Veggie Hoagie</item>

    </string-array>

</resources>

build.gradle

apply plugin: 'com.android.application'

android {
    compileSdkVersion 24
    buildToolsVersion "25.0.2"
    defaultConfig {
        applicationId "com.app.recipeapp"
        minSdkVersion 16
        targetSdkVersion 24
        versionCode 1
        versionName "1.0"
        testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
    }
    buildTypes {
        release {
            minifyEnabled false
            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
        }
    }
}

dependencies {
    compile fileTree(dir: 'libs', include: ['*.jar'])
    androidTestCompile('com.android.support.test.espresso:espresso-core:2.2.2', {
        exclude group: 'com.android.support', module: 'support-annotations'
    })
    compile 'com.android.support:appcompat-v7:24.2.1'
    compile 'com.android.support.constraint:constraint-layout:1.0.2'
    testCompile 'junit:junit:4.12'
}

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