Android Program : Create an Android Application that will change color of the College Name on click of Push Button and change the font size, font style of text view using xml.

 Android Program : Create an Android Application that will change color of the College Name on click of Push Button and change the font size, font style of text view using xml.

activity_main.xml

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

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"

    android:orientation="vertical"

    android:layout_width="match_parent"

    android:layout_height="match_parent">

 

    <TextView

        android:id="@+id/textView"

        android:layout_width="match_parent"

        android:layout_height="wrap_content"

        android:layout_margin="30dp"

        android:gravity="center"

        android:text="Hello World!"

        android:textSize="25sp"

        android:textStyle="bold" />

 

    <Button

        android:id="@+id/button1"

        android:layout_width="match_parent"

        android:layout_height="wrap_content"

        android:layout_margin="20dp"

        android:gravity="center"

        android:text="Change font size"

        android:textSize="25sp" />

    <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" />

</LinearLayout>










MainActivity.java

package com.example.slip5a;

 

import android.graphics.Color;

import android.support.v7.app.AppCompatActivity;

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;

            }

        });

    }

}