Android

Create A CheckBox App In An Android Application Using Android Studio

Introduction

This blog explains how to develop a checkbox app in an Android Application, using Android Studio.

Requirements

  • Android Studio 2.1.3

If you want create a checkbox app, it should follow the steps given below.

Step 1

Now, open Android Studio and you can choose the File, followed by New.  Afterwards, choose New Project.

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Step 2

Here, you can create Your Application name and choose where your project is stored on the location and click Next button.

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Now, we can select the version of Android. It is Target Android Devices.

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Step 3

Here, we can add the activity, more activity is available, and click Next button.

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Now, we can write the activity name and click the Finish button.

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Step 4

Now, open your project and you will go to the activity_main.xml and afterwards, you will build the design. It should choose toolbox and if you want some other option (CheckBox, TextView), use the drag and drop method.

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Now, we can see the Graphical User Interface design.

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Step 5

Now, you will go to the resource folder and select the String.xml. Subsequently, you need to add the string value.

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srings.xml code

  1. <resources>  
  2.     <string name="app_name">CheckBoxApp</string>  
  3.     <string name="Apple">APPLE</string>  
  4.     <string name="Banana">BANANA</string>  
  5.     <string name="BluBerry">BLUEBERRY</string>  
  6.     <string name="Grapes">GRAPES</string>  
  7.     <string name="Straw">STRAW</string>  
  8. </resources>  
Step 6

Here, you need to build on design and write the .XML code.

activity_main.xml code.
  1. <?xml version="1.0" encoding="utf-8"?>  
  2. <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" 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="xyz.rvconstructions.www.checkboxapp.MainActivity">  
  3.     <TextView android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="Select Your favorite fruits: " android:textColor="#f00" android:textSize="20sp" android:textStyle="bold" />  
  4.     <LinearLayout android:id="@+id/linearLayout" android:layout_width="fill_parent" android:layout_height="wrap_content" android:layout_marginTop="30dp" android:background="#e0e0e0" android:orientation="vertical">  
  5.         <CheckBox android:id="@+id/applechkb" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_centerHorizontal="true" android:checked="false" android:padding="20dp" android:text="@string/Apple" android:textColor="#44f" android:textSize="20sp" android:textStyle="bold|italic" />  
  6.         <CheckBox android:id="@+id/bananachkb" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_centerHorizontal="true" android:checked="false" android:padding="20dp" android:text="@string/Banana" android:textColor="#f44" android:textSize="20sp" android:textStyle="bold|italic" />  
  7.         <CheckBox android:id="@+id/strawchkb" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_centerHorizontal="true" android:checked="false" android:padding="20dp" android:text="@string/BluBerry" android:textColor="#444" android:textSize="20sp" android:textStyle="bold|italic" />  
  8.         <CheckBox android:id="@+id/blueberrychkb" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_centerHorizontal="true" android:checked="false" android:padding="20dp" android:text="@string/Grapes" android:textColor="#888" android:textSize="20sp" android:textStyle="bold|italic" />  
  9.         <CheckBox android:id="@+id/grapschkb" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_centerHorizontal="true" android:checked="false" android:padding="20dp" android:text="@string/Straw" android:textColor="#101010" android:textSize="20sp" android:textStyle="bold|italic" />  
  10.     </LinearLayout>  
  11. </RelativeLayout>  
Step 7

Now, you will go to MainActivity.java page and build Java code.

First of all, you will declare a file, which is an extension file.

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Now, we can see MainActivity.java code.
  1. package xyz.rvconstructions.www.checkboxapp;  
  2.   
  3. import android.support.v7.app.AppCompatActivity;  
  4. import android.os.Bundle;  
  5. import android.graphics.Color;  
  6. import android.os.Bundle;  
  7. import android.view.Menu;  
  8. import android.view.MenuItem;  
  9. import android.view.View;  
  10. import android.widget.Button;  
  11.   
  12. import android.widget.CheckBox;  
  13. import android.widget.Toast;  
  14.   
  15. public class MainActivity extends AppCompatActivity implements View.OnClickListener {  
  16.     CheckBox Abble, Banana, Straw, Blueberry, Grapes;  
  17.     @Override  
  18.     protected void onCreate(Bundle savedInstanceState) {  
  19.         super.onCreate(savedInstanceState);  
  20.         setContentView(R.layout.activity_main);  
  21.   
  22.         Abble = (CheckBox) findViewById(R.id.applechkb);  
  23.         Abble.setOnClickListener(this);  
  24.         Banana = (CheckBox) findViewById(R.id.bananachkb);  
  25.         Banana.setOnClickListener(this);  
  26.         Straw = (CheckBox) findViewById(R.id.strawchkb);  
  27.         Straw.setOnClickListener(this);  
  28.         Blueberry = (CheckBox) findViewById(R.id.blueberrychkb);  
  29.         Blueberry.setOnClickListener(this);  
  30.         Grapes = (CheckBox) findViewById(R.id.grapschkb);  
  31.         Grapes.setOnClickListener(this);  
  32.     }  
  33.     @Override  
  34.     public void onClick(View view) {  
  35.         switch (view.getId()) {  
  36.             case R.id.applechkb:  
  37.                 if (Abble.isChecked())  
  38.                     Toast.makeText(getApplicationContext(), "Your clicked abble", Toast.LENGTH_LONG).show();  
  39.                 break;  
  40.             case R.id.bananachkb:  
  41.                 if (Banana.isChecked())  
  42.                     Toast.makeText(getApplicationContext(), "Your clicked banana", Toast.LENGTH_LONG).show();  
  43.                 break;  
  44.             case R.id.strawchkb:  
  45.                 if (Straw.isChecked())  
  46.                     Toast.makeText(getApplicationContext(), "Your clicked straw", Toast.LENGTH_LONG).show();  
  47.                 break;  
  48.             case R.id.blueberrychkb:  
  49.                 if (Blueberry.isChecked())  
  50.                     Toast.makeText(getApplicationContext(), "Your clicked blueberry", Toast.LENGTH_LONG).show();  
  51.                 break;  
  52.             case R.id.grapschkb:  
  53.                 if (Grapes.isChecked())  
  54.                     Toast.makeText(getApplicationContext(), "Your clicked grapes", Toast.LENGTH_LONG).show();  
  55.                 break;  
  56.         }  
  57.     }  
  58. }  
Step 8

Here, you will go to run it and select Run-> Run app option.

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Here, you will choose Emulator or the devices and it is Nokia Nokia _X.

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Step 9

Here, you can see the output.

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Now, you will check Apple and afterwards, you will see the given output.

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Now, you will check Banana and afterwards, you will see the given output.

Android

 
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