Android TextSwitcher Tutorial With Example

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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 Android TextSwitcher Tutorial With Example

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 –

Sr. XML Attributes Description
1 android:animateFirstView Defines whether to animate the current view when the view animation is first displayed
2 android:inAnimation Specifies the animation to use when view is shown
3 android:outAnimation Specifies the animation to use when view is hidden

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

Sr. XML Attributes Description
1 android:foregroundGravity Specifies gravity to apply to the foreground drawable
2 android:measureAllChildren Specifies whether to measure all children or just those in VISIBLE or INVISIBLE state while measuring

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

Sr. XML Attributes Description
1 android:animateLayoutChanges Defines whether layoutTransition should run when there is any changes in layout
2 android:animationCache Defines whether layout animations should create drawing cache for their children
3 android:clipToPadding Defines whether the ViewGroup will clip its children and resize (but not clip) any EdgeEffect to its padding, if padding is not zero.
4 android:layoutAnimation Defines layout animation to use when the viewGroup is laid out for the first time
5 android:layoutMode Defines the layout mode of this viewGroup

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

Sr. XML Attributes Description
1 android:alpha Defines alpha of the view
2 android:clickable Defines whether this view is clickable
3 android:background Defines drawable for the background of the view
4 android:elevation Defines z-depth of the view
5 android:id Defines unique id of the view
6 android:onClick Defines what to do when this view is clicked
7 android:padding Defines padding of the view
8 android:visibility Defines visibility(VISIBLE, INVISIBLE or GONE) of the view



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.

Step Description
1. Open Android Studio.
2. Go to File => New => New Project. Write application name as TextSwitcher. Then, click next button.
3. Select minimum SDK you need. However, we have selected 17 as minimum SDK. Then, click next button
4. Then, select Empty Activity => click next => click finish.
5. If you have followed above process correctly, you will get a newly created project successfully. However, you can also visit post to create a new project to know steps in detail.

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.

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We have recently published 100+ articles on android tutorials with kotlin and java. If you need, you may visit Android Tutorial for beginners page. You can also check Kotlin Tutorial for beginners