Hello Readers! In this post, we are going to learn about how to use android textSwitcher widget in any android application. We will also go through different attributes of textSwitcher widget that can be used to customise it.

Output

Tutorialwing Android TextSwitcher Output

Getting Started

TextSwitcher widget can be defined as below –

TextSwitcher, subclass of ViewSwitcher, is a widget that contains only children of type TextView. It is used to switch between views using animations. It animates the current text out and animates the next text in.

Attributes of Android TextSwitcher Widget

Some of the popular attributes of android textSwitcher widget inherited from viewAnimator are –

Some of the popular attributes of android textSwitcher inherited from FrameLayout are –

Some of the popular attributes of android textSwitcher inherited from ViewGroup are –

Some of the popular attributes of android textSwitcher inherited from View are –

Example of Android TextSwitcher Widget

At first, we will create android application. Then, we will use textSwitcher widget in this application.

1. Creating New Project

Follow steps below to create new project. Please ignore the steps if you have already created a new application.

Now, we will modify xml and java file to use textSwitcher widget in the application.

2. Modify Values folder

Open res/values/strings.xml file. Then, add below code into it.

<resources>
	<string name="app_name">TextSwitcher</string>
	<string name="next">Next</string>
</resources>

3. Use TextSwitcher Widget in xml file

Open res/layout/activity_main.xml file. Then, add below code into it.

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
	xmlns:android="http://schemas.android.com/apk/res/android"
	android:layout_width="match_parent"
	android:layout_height="match_parent"
	android:orientation="vertical">

	<Button
		android:id="@+id/button"
		android:layout_width="wrap_content"
		android:layout_height="wrap_content"
		android:layout_gravity="center"
		android:layout_marginTop="40dp"
		android:text="@string/next"/>

	<TextSwitcher
		android:id="@+id/textSwitcher"
		android:layout_width="match_parent"
		android:layout_height="wrap_content"
		android:layout_marginTop="20dp"/>

</LinearLayout>

In activity_main.xml file, we have defined button and textSwitcher widgets. Now, we will access these widgets in java file to perform some operations on them.

4. Access TextSwitcher Widget in java file

Open src/main/java/com.tutorialwing.textswitcher/MainActivity.java file. Then, add below code into it.

package com.tutorialwing.textswitcher;

import android.graphics.Color;
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
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;

public class MainActivity extends AppCompatActivity {

	final String[] textList = {"Panda", "Tiger", "Zebra", "Lion", "Deer", "Goat", "Ape", "Monkey", "Human"};
	int index = 0;

	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.activity_main);

		final TextSwitcher textSwitcher = findViewById(R.id.textSwitcher);
		if (textSwitcher != null) {
			textSwitcher.setFactory(new ViewSwitcher.ViewFactory() {
				public View makeView() {
					TextView textView = new TextView(MainActivity.this);
					textView.setGravity(Gravity.TOP | Gravity.CENTER_HORIZONTAL);
					textView.setTextSize(32);
					textView.setTextColor(Color.RED);
					return textView;
				}
			});
			textSwitcher.setText(textList[index]);

			Animation in = AnimationUtils.loadAnimation(this, android.R.anim.slide_in_left);
			textSwitcher.setInAnimation(in);

			Animation out = AnimationUtils.loadAnimation(this, android.R.anim.slide_out_right);
			textSwitcher.setOutAnimation(out);

			Button button = findViewById(R.id.button);
			button.setOnClickListener(new View.OnClickListener() {

				public void onClick(View v) {
					index = ((index + 1) < textList.length) ? (index + 1) : 0;
					textSwitcher.setText(textList[index]);
				}
			});
		}
	}
}

We have accessed textSwitcher widget in the java file. Then, we have set factory that defines the view between which textSwitcher will switch. Then, we have set in and out animations that will be used when textView appears/disappears on/from the screen. At last, we have accessed button and set click listener that displays the next textViews when it is clicked.

Since AndroidManifest.xml file is very important in any android application, we are also going to see the content inside this file.

AndroidManifest.xml

Code inside src/main/AndroidManifest.xml file is as below –

<?xml version="1.0" encoding="utf-8"?>
<manifest package="com.tutorialwing.textswitcher"
		  xmlns:android="http://schemas.android.com/apk/res/android">

	<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>

When we run the program, we will get output as shown above.

That’s end of tutorial on Android TextSwitcher widget.