Android CheckBox With Example
Android CheckBox With Example
Difficulty level : Very-Easy * Last Updated On : 05th June, 2021
Check Box is an android widget that is used to get a boolean value from the user in the form of checked or unchecked option on the check box. If the checkbox is checked the value is true else if the checkbox is not checked then the value is false.
Below is the picture showing the checkbox in light and dark mode
The Source Code for the above output is as follows: -
To display the imageview on the screen xml code is used.
XML CODE : (file name - activity_main.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=".MainActivity">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="horizontal"
android:padding="4dp"
tools:ignore="UseCompoundDrawables">
<CheckBox
android:id="@+id/checkbox"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginStart="15dp"
android:layout_marginTop="15dp"
android:contentDescription="None"
android:buttonTint="@color/color3"
android:checked="false"
/>
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginStart="8dp"
android:layout_marginTop="15dp"
android:text="I'm A Check Box"
android:textColor="@color/color5"
android:textSize="17sp" />
</LinearLayout>
</RelativeLayout>
The colors that are used in the application or on the widget are written in the colors file of the android project.
COLORS FILE CODE : (file name - colors.xml)
<?xml version="1.0" encoding="utf-8"?>
<resources>
<color name="purple_200">#FFBB86FC</color>
<color name="purple_500">#FF6200EE</color>
<color name="purple_700">#FF3700B3</color>
<color name="teal_200">#FF03DAC5</color>
<color name="teal_700">#FF018786</color>
<color name="black">#FF000000</color>
<color name="white">#FFFFFFFF</color>
<color name="color1">#EE82EE</color>
<color name="color2">#FDBE3B</color>
<color name="color3">#FF4842</color>
<color name="color4">#3a52fc</color>
<color name="color5">#000000</color>
</resources>
Java file is used to write the program and all the actions that are performed on the widget while on the screen is done by the Java file.
MAIN ACTIVITY CODE : (file name - MainActivity.java)
package com.example.differentandroidcodes;
import androidx.appcompat.app.AppCompatActivity;
import android.annotation.SuppressLint;
import android.os.Bundle;
import android.widget.CheckBox;
public class MainActivity extends AppCompatActivity {
CheckBox checkBox;
@SuppressLint("SetTextI18n")
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
checkBox = findViewById(R.id.checkbox);
checkBox.setChecked(true); //this will set the check box checked
checkBox.setChecked(false); //this will set the check box unchecked
}
}
Note : setChecked is used to check or uncheck the checkbox widget.
Manifest file is generated automatically. You can view this file by clicking on the manifest option that is show the project structure image.
MANIFEST FILE CODE: (file name - AndroidManifest.xml)
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example.differentandroidcodes">
<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/Theme.DifferentStyleButtons">
<activity android:name="com.example.differentandroidcodes.MainActivity">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
</application>
</manifest>
Output : -
Dark Theme Check Box (Checked)
Dark Theme Check Box (UnChecked)
Light Theme Check Box (Checked)
Light Theme Check Box (UnChecked)
Project Structure
Note : The Selected Files are the important files and the code of those files are given in this article.
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