Android

Android Spinner and Checkbox Example

September 13, 2018

3624

Introduction

In this article, we learn the Android spinner and checkbox Example. If you have not yet checked it out, I would highly recommend you to read a complete practical work of Android spinner and checkbox working.

You will learn in this section

Spinner
Checkbox

Prerequisite

It will good to cover my previous articles before this. Its help to learn more about Android development. In which I explained. How can create checkbox and spinner in android?

What is spinner

Spinner is same like drop-down menu allows to select something from the list. The spinner manages the data through the adapter. The android spinner like a box its show multiple values.

The spinners give a speedy method to choose one incentive from a set. It allows selecting one value from drop box menu.

Contacting the spinner shows a drop-down menu with all other accessible qualities, from which the user can choose another one. You will define the array adapter in Java as well in XML. What layout are shown in a drop-down menu?. When you click on spinner what happened.

Spinner working step by step

Create a checkbox in XML or Java.
Create the data source.
Define the separate layout file in which adapter will map the data inside the spinner.
Using onItemSelectedListener method what to do when the user clicks on it.

Open <res> click on <values> than open <string.xml>

File:string.xml

<?xml version="1.0" encoding="utf-8"?>
<resources>
     <string name="app_name">My Application</string>
    <string name="hello_world">Hello world!</string>
    <string name="action_settings">Settings</string>
    <string-array name="country">
        <item>USA</item>
        <item>CHINA</item>
        <item>UK</item>
        <item>japan</item>
        <item>UAE</item>
         <item>Australia</item>
</string-array>
</resources>

<?xml version="1.0" encoding="utf-8"?>

<string name="app_name">My Application</string>

<string name="hello_world">Hello world!</string>

<string name="action_settings">Settings</string>

<string-array name="country">

<item>CHINA</item>

<item>japan</item>

<item>Australia</item>

</string-array>

</resources>

Create a new Layout

->Right click> the ->layout folder-> select ->New option->and ->click ><-layout resource folder-> and<-After the layout is created>

<Paste the following code>

File:activity_main.xml.

?xml version="1.0" encoding="utf-8"?>
<LinearLayout 
    android:orientation="vertical" android:layout_width="match_parent"
    android:layout_height="match_parent">
<Spinner
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:id="@+id/spinner"
        android:layout_below="@+id/textView"
        android:layout_centerHorizontal="true"
        android:layout_marginTop="92dp" />
</LinearLayout>

?xml version="1.0" encoding="utf-8"?>

<LinearLayout

android:orientation="vertical" android:layout_width="match_parent"

android:layout_height="match_parent">

<Spinner

android:layout_width="wrap_content"

android:layout_height="wrap_content"

android:id="@+id/spinner"

android:layout_below="@+id/textView"

android:layout_centerHorizontal="true"

android:layout_marginTop="92dp" />

</LinearLayout>

Create a new Class

Create new class ->Right click-> the ->package name ->select ->New option-> and click-> java class <-Create new class ->.

<Paste the following code on an activity that hosts the layout>

File:MainActivity.java

import android.app.Activity;
import android.content.Context;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.widget.Adapter;
import android.widget.AdapterView;
import android.widget.ArrayAdapter;
import android.widget.Spinner;
import android.widget.TextView;
import android.widget.Toast;
public class MainActivity extends Activity implements AdapterView.OnItemSelectedListener{
     Spinner spinner;
    Context contex;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        spinner=(Spinner)findViewById(R.id.spinner);
ArrayAdapter adapter= ArrayAdapter.createFromResource(this,R.array.country,R.layout.simple_spinner_item);
        spinner.setAdapter(adapter);
        spinner.setOnItemClickListener((AdapterView.OnItemClickListener) this);
    }
   @Override
    public void onItemSelected(AdapterView<?> adapterView, View view, int i, long l) {
        TextView mytext=(TextView) view;
        Toast.makeText(contex,"Your message"+mytext.getText(), Toast.LENGTH_LONG).show();
    }
    @Override
    public void onNothingSelected(AdapterView<?> adapterView) {
  }}

import android.app.Activity;

import android.content.Context;

import android.os.Bundle;

import android.view.Menu;

import android.view.MenuItem;

import android.view.View;

import android.widget.Adapter;

import android.widget.AdapterView;

import android.widget.ArrayAdapter;

import android.widget.Spinner;

import android.widget.TextView;

import android.widget.Toast;

public class MainActivity extends Activity implements AdapterView.OnItemSelectedListener{

Spinner spinner;

Context contex;

@Override

protected void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.activity_main);

spinner=(Spinner)findViewById(R.id.spinner);

ArrayAdapter adapter= ArrayAdapter.createFromResource(this,R.array.country,R.layout.simple_spinner_item);

spinner.setAdapter(adapter);

spinner.setOnItemClickListener((AdapterView.OnItemClickListener) this);

}

@Override

public void onItemSelected(AdapterView<?> adapterView, View view, int i, long l) {

TextView mytext=(TextView) view;

Toast.makeText(contex,"Your message"+mytext.getText(), Toast.LENGTH_LONG).show();

}

@Override

public void onNothingSelected(AdapterView<?> adapterView) {

}}

What is Checkbox

It is a graphical display in which the user can select something. After selection particular feature has been displaying. The checkbox is used only in those case when the user has more than one option and want to select one of those.

Concept: Would you like a mobile. which one android or ios. You will select one option between these.

Checkbox working step by step

Create a checkbox in XML or Java.
Implementation of View.OnClickListner.
For check or uncheck onClick method is defined.
Using the isChecked method find that the box is checked or not.

Create a new Layout

->Right click> the ->layout folder-> select ->New option->and ->click ><-layout resource folder-> and<-After the layout is created>

File:activity_main.xml

<RelativeLayout 
     android:layout_width="match_parent"
   android:layout_height="match_parent" android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin"
    android:paddingBottom="@dimen/activity_vertical_margin" tools:context=".Demoactivity"
    android:id="@+id/d">
        <CheckBox
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="android"
        android:id="@+id/checkBox2"
        android:checked="false"
        android:layout_marginTop="65dp"
        android:layout_below="@+id/textView"
        android:layout_centerHorizontal="true" />
       <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="would you like android mobile"
        android:id="@+id/textView"
        android:layout_alignParentTop="true"
        android:layout_centerHorizontal="true" />
      </RelativeLayout>

<RelativeLayout

android:layout_width="match_parent"

android:layout_height="match_parent" android:paddingLeft="@dimen/activity_horizontal_margin"

android:paddingRight="@dimen/activity_horizontal_margin"

android:paddingTop="@dimen/activity_vertical_margin"

android:paddingBottom="@dimen/activity_vertical_margin" tools:context=".Demoactivity"

android:id="@+id/d">

<CheckBox

android:layout_width="wrap_content"

android:layout_height="wrap_content"

android:text="android"

android:id="@+id/checkBox2"

android:checked="false"

android:layout_marginTop="65dp"

android:layout_below="@+id/textView"

android:layout_centerHorizontal="true" />

<TextView

android:layout_width="wrap_content"

android:layout_height="wrap_content"

android:text="would you like android mobile"

android:id="@+id/textView"

android:layout_alignParentTop="true"

android:layout_centerHorizontal="true" />

</RelativeLayout>

Create a new Class

Create new class ->Right click-> the ->package name ->select ->New option-> and click-> java class <-Create new class ->.

<Paste the following code on an activity that hosts the layout>

File:MainActivity.java

import android.app.Activity;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.widget.CheckBox;
import android.widget.Toast;
public class Demoactivity extends Activity implements View.OnClickListener {
CheckBox one;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_demoactivity);
        one= (CheckBox) findViewById(R.id.checkBox2);
        one.setOnClickListener(this);
    }
    @Override
    public void onClick(View v) {
   CheckBox x=(CheckBox)  v;
        if(x.isChecked())
        {
     Toast.makeText(this,"I like android phone",Toast.LENGTH_SHORT).show();
        }
        else {
     Toast.makeText(this,"I do not like android phone",Toast.LENGTH_SHORT).show();
        }}}

import android.app.Activity;

import android.os.Bundle;

import android.view.Menu;

import android.view.MenuItem;

import android.view.View;

import android.widget.CheckBox;

import android.widget.Toast;

public class Demoactivity extends Activity implements View.OnClickListener {

CheckBox one;

@Override

protected void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.activity_demoactivity);

one= (CheckBox) findViewById(R.id.checkBox2);

one.setOnClickListener(this);

}

@Override

public void onClick(View v) {

CheckBox x=(CheckBox) v;

if(x.isChecked())

{

Toast.makeText(this,"I like android phone",Toast.LENGTH_SHORT).show();

}

else {

Toast.makeText(this,"I do not like android phone",Toast.LENGTH_SHORT).show();

}}}

Output:

Conclusion

I wish I could tell you that a great site. You just understand the key element above post-Android Spinner and Checkbox Example. More, detail about More Detail about. You also read my other lecture. I hope you will understand this lecture. Hope you got the idea.

Android Spinner and Checkbox Example

Introduction

You will learn in this section

Prerequisite

What is spinner

Spinner working step by step

Create a new Layout

->Right click> the ->layout folder-> select ->New option->and ->click ><-layout resource folder-> and<-After the layout is created>

<Paste the following code>

Create new class ->Right click-> the ->package name ->select ->New option-> and click-> java class <-Create new class ->.

<Paste the following code on an activity that hosts the layout>

What is Checkbox

Checkbox working step by step

Create a new Layout

->Right click> the ->layout folder-> select ->New option->and ->click ><-layout resource folder-> and<-After the layout is created>

Create new class ->Right click-> the ->package name ->select ->New option-> and click-> java class <-Create new class ->.

<Paste the following code on an activity that hosts the layout>

Conclusion

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