How to add TextSwitcher with animation in Android using Java

A TextSwitcher is used to animate a text on a screen. It is the child class of the ViewSwitcher class. It contains only one child of type TextView. In order to set animation on TextSwitcher we have to add animation tag or we can add programmatically. Here are the some usage of TextSwitcher:

• Changing numbers in a Date Picker
• Countdown of timer clock

TextSwitcher uses two type of animations:




• In Animation
• Out Animation

Approach:

1. Add the following code in the activity_main.xml file.
   
   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">
   
       <TextSwitcher
           android:id="@+id/textSwitcher"
           android:layout_width="match_parent"
           android:layout_height="wrap_content"
           android:layout_marginTop="80dp"
           android:inAnimation="@android:anim/slide_in_left"
           android:outAnimation="@android:anim/slide_out_right" />
   
       <Button
           android:id="@+id/button"
           android:textSize="20sp"
           android:layout_width="wrap_content"
           android:layout_height="wrap_content"
           android:layout_centerHorizontal="true"
           android:layout_centerVertical="true"
           android:text="Next" />
   
   </RelativeLayout>
2. Now add the following code in the MainActivity.java file.
   
   MainActivity.java

   package com.madhav.maheshwari.gfgTextSwitcher;
   
   import android.graphics.Color;
   import android.os.Bundle;
   import android.view.Gravity;
   import android.view.View;
   import android.widget.Button;
   import android.widget.TextSwitcher;
   import android.widget.TextView;
   import android.widget.ViewSwitcher;
   
   import androidx.appcompat.app.AppCompatActivity;
   
   public class MainActivity extends AppCompatActivity {
       private TextSwitcher textSwitcher;
       private Button nextButton;
       private int index = 0;
       private String[] arr
           = { "GeeksForGeeks", "A",
               "Computer", "Science",
               "Portal", "For",
               "Geeks" };
       private TextView textView;
   
       @Override
       protected void onCreate(
           Bundle savedInstanceState)
       {
           super.onCreate(savedInstanceState);
           setContentView(R.layout.activity_main);
   
           textSwitcher = findViewById(R.id.textSwitcher);
           nextButton = findViewById(R.id.button);
           nextButton.setOnClickListener(
               new View.OnClickListener() {
                   @Override
                   public void onClick(View v)
                   {
   
                       // when the text switcher
                       // reaches at the end
                       // of our array. It will
                       // be reset to 0.
                       if (index == arr.length - 1) {
                           index = 0;
                           textSwitcher.setText(arr[index]);
                       }
                       else {
                           textSwitcher.setText(arr[++index]);
                       }
                   }
               });
   
           // Here we have to create
           // a TextView for our TextSwitcher
           textSwitcher.setFactory(
               new ViewSwitcher.ViewFactory() {
                   @Override
                   public View makeView()
                   {
                       textView
                           = new TextView(
                               MainActivity.this);
                       textView.setTextColor(
                           Color.parseColor("#219806"));
   
                       textView.setTextSize(40);
                       textView.setGravity(
                           Gravity.CENTER_HORIZONTAL);
                       return textView;
                   }
               });
   
           // This is used to set the text
           // when app starts which is
           // at index i.e 0.
           textSwitcher.setText(arr[index]);
       }
   }

Output: