CheckBox
MainActivity -
package com.example.checkbox;
import androidx.appcompat.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.CheckBox;
import android.widget.TextView;
import java.util.ArrayList;
public class MainActivity extends AppCompatActivity {
private CheckBox mJava,mPython,mKotlin,mC,mPearl;
private Button show;
private TextView showText;
private ArrayList<String>mResult;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
mJava=findViewById(R.id.check_java);
mPython=findViewById(R.id.check_python);
mKotlin=findViewById(R.id.check_kotlin);
mC=findViewById(R.id.check_c);
mPearl=findViewById(R.id.check_pearl);
showText=findViewById(R.id.txtResult);
mResult=new ArrayList<>();
show=findViewById(R.id.btnResult);
showText.setEnabled(false);
mJava.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
if(mJava.isChecked())
{
mResult.add("Java");
}
else
{
mResult.remove("Java");
}
}
});
mPython.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
if(mPython.isChecked())
{
mResult.add("Python");
}
else
{
mResult.remove("Python");
}
}
});
mKotlin.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
if(mKotlin.isChecked())
{
mResult.add("Kotlin");
}
else
{
mResult.remove("Kotlin");
}
}
});
mJava.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
if(mJava.isChecked())
{
mResult.add("Java");
}
else
{
mResult.remove("Java");
}
}
});
mC.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
if(mC.isChecked())
{
mResult.add("C");
}
else
{
mResult.remove("C");
}
}
});
mPearl.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
if(mPearl.isChecked())
{
mResult.add("Pearl");
}
else
{
mResult.remove("Pearl");
}
}
});
show.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
StringBuilder stringBuilder=new StringBuilder();
for(String s:mResult)
stringBuilder.append(s).append("\n");
showText.setText(stringBuilder.toString());
showText.setEnabled(false);
}
});
}
}
---------------------------------------------------------------------------------------------------------------------------
activity_main -
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout 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"
android:orientation="vertical"
android:padding="15sp"
tools:context=".MainActivity">
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textSize="25sp"
android:text="Select Your Favourite Languages"
android:layout_marginTop="150dp"
android:layout_gravity="center"/>
<CheckBox
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Java"
android:id="@+id/check_java"/>
<CheckBox
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Python"
android:id="@+id/check_python"/>
<CheckBox
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Kotlin"
android:id="@+id/check_kotlin"/>
<CheckBox
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="C"
android:id="@+id/check_c"/>
<CheckBox
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Pearl"
android:id="@+id/check_pearl"/>
<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Show Result"
android:id="@+id/btnResult"
android:layout_gravity="center"
android:layout_marginTop="25dp"
/>
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text=" "
android:id="@+id/txtResult"
android:layout_gravity="center"
android:layout_marginTop="25dp"
/>
</LinearLayout>
-----------------------------------------------------------------------------------------------------------------------------
AndroidManifest -
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example.checkbox">
<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=".MainActivity">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
</application>
</manifest>
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