How to Used TextSwitcher

The Switcher specialize ViewSwitcher .That implement only for children of type textView . A TextSwitcher  useful animate  labale on Screen. show example.

MainActivity.java
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package com.androidbeginner.testcode;

import android.app.Activity;
import android.graphics.Color;
import android.os.Bundle;
import android.view.Gravity;
import android.view.View;
import android.view.animation.Animation;
import android.view.animation.AnimationUtils;
import android.widget.Button;
import android.widget.TextSwitcher;
import android.widget.TextView;
import android.widget.ViewSwitcher.ViewFactory;

public class MainActivity extends Activity {
 private TextSwitcher TxtSwitcher;
      Button Nextbtn;
     
      // Array of String to Show In TextSwitcher
      String textToShow[]={"A","B","C","D","E","F","G","H","I","K","L","M","N","O","P","Q","R","S","T","U","V","W","X","Y","Z"};
      int messageCount=textToShow.length;
      // to keep current Index of text
      int currentIndex=-1;  

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
     // get The references
        Nextbtn=(Button)findViewById(R.id.butn_signUp);
        TxtSwitcher = (TextSwitcher) findViewById(R.id.textSwitcher1);
       
        // Set the ViewFactory of the TextSwitcher that will create TextView object when asked
        TxtSwitcher.setFactory(new ViewFactory() {
           
            public View makeView() {
                // TODO Auto-generated method stub
                // create new textView and set the properties like clolr, size etc
                TextView myText = new TextView(MainActivity.this);
                myText.setGravity(Gravity.TOP | Gravity.CENTER_HORIZONTAL);
                myText.setTextSize(36);
                myText.setTextColor(Color.BLUE);
                return myText;
            }
        });

        // Declare the in and out animations and initialize them
        Animation in = AnimationUtils.loadAnimation(this,android.R.anim.slide_in_left);
        Animation out = AnimationUtils.loadAnimation(this,android.R.anim.slide_out_right);
       
        // set the animation type of textSwitcher
        TxtSwitcher.setInAnimation(in);
        TxtSwitcher.setOutAnimation(out);
   
        // ClickListener for NEXT button
        // When clicked on Button TextSwitcher will switch between texts
        // The current Text will go OUT and next text will come in with specified animation
        Nextbtn.setOnClickListener(new View.OnClickListener() {
           
            public void onClick(View v) {
                // TODO Auto-generated method stub
                currentIndex++;
                // If index reaches maximum reset it
                if(currentIndex==messageCount)
                    currentIndex=0;
                TxtSwitcher.setText(textToShow[currentIndex]);
            }
        });
    }
}

acivity_main.xml

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

    xmlns:tools="http://schemas.android.com/tools"

    android:layout_width="match_parent"

    android:layout_height="match_parent"

    android:id="@+id/text"

    android:paddingBottom="@dimen/activity_vertical_margin"

    android:paddingLeft="@dimen/activity_horizontal_margin"

    android:paddingRight="@dimen/activity_horizontal_margin"

    android:paddingTop="@dimen/activity_vertical_margin"

    tools:context="com.androidbeginner.testcode.MainActivity" >

    <TextView

        android:id="@+id/textView1"

        android:layout_width="wrap_content"

        android:layout_height="wrap_content"

        android:layout_centerHorizontal="true"

        android:layout_centerVertical="true"

        android:padding="10dp"

        android:text="Androidbeginner"

        android:textSize="20sp" />

    <Button

        android:id="@+id/butn_signUp"

        android:layout_width="fill_parent"

        android:layout_height="50dp"

        android:layout_below="@+id/textView1"

        android:layout_centerHorizontal="true"

        android:layout_marginTop="67dp"

        android:padding="10dp"    

        android:background="@drawable/button_action"

        android:text="Next" />

    <TextSwitcher

        android:id="@+id/textSwitcher1"

        android:layout_width="400dp"

        android:layout_height="50dp"

        android:layout_alignLeft="@+id/textView1"

        android:layout_alignParentTop="true"

        android:textSize="80sp"

        android:layout_marginTop="100dp" >

    </TextSwitcher>

</RelativeLayout>