Note: Create button for colors and fonts while clicking color or font button should change
To create an application that uses GUI Components with Fonts and Colors using Android Studio.
Latest Version Android Studio
Step 1: Open Android Studio and then click on File -> New -> New project.
Step 2: Then type the Application name as HelloWorld and click Next.
Step 3: Then select the Minimum SDK as shown below and click Next.
Step 4: Then select the Empty Activity and click Next. Finally click Finish.
Step 5: Design layout in activity_main.xml
Step 6: Display message give in MainActivity file.
Step 7: Save and run the application.
/* Program to print the text “GUIcomponent”.
Developed by:Kulaganachi.R
Registeration Number :212221040086 */
<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.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=".MainActivity">
<TextView
android:id="@+id/textView"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_margin="30dp"
android:layout_marginTop="296dp"
android:gravity="center"
android:text="Hello World!"
android:textSize="25sp"
android:textStyle="bold"
app:layout_constraintBottom_toTopOf="@+id/button1"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="0.266"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent"
tools:ignore="MissingConstraints" />
<Button
android:id="@+id/button1"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_margin="20dp"
android:layout_marginBottom="48dp"
android:gravity="center"
android:text="Change font size"
android:textSize="25sp"
app:layout_constraintBottom_toTopOf="@+id/button2"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="0.25"
app:layout_constraintStart_toStartOf="parent"
tools:ignore="MissingConstraints" />
<Button
android:id="@+id/button2"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_margin="20dp"
android:gravity="center"
android:text="Change color"
android:textSize="25sp"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="0.4"
app:layout_constraintStart_toStartOf="parent"
tools:ignore="MissingConstraints" />
</androidx.constraintlayout.widget.ConstraintLayout>
package com.example.ex2;
import androidx.appcompat.app.AppCompatActivity;
import android.graphics.Color;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.TextView;
public class MainActivity extends AppCompatActivity {
int ch=1;
float font=30;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
final TextView t = (TextView) findViewById(R.id.textView);
Button b1 = (Button) findViewById(R.id.button1);
b1.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
t.setTextSize(font);
font = font + 5;
if (font == 50)
font = 30;
}
});
Button b2 = (Button) findViewById(R.id.button2);
b2.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
switch (ch) {
case 1:
t.setTextColor(Color.RED);
break;
case 2:
t.setTextColor(Color.GREEN);
break;
case 3:
t.setTextColor(Color.BLUE);
break;
case 4:
t.setTextColor(Color.CYAN);
break;
case 5:
t.setTextColor(Color.YELLOW);
break;
case 6:
t.setTextColor(Color.MAGENTA);
break;
}
ch++;
if (ch == 7)
ch = 1;
}
});
} }
Thus a Simple Android Application that uses GUI Components with Fonts and Colors using Android Studio is developed and executed successfully.