ViewFlipper in Android

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Complete source code in Android how to use the ViewFlipper widget, which is a subclass of ViewAnimator and makes it easy to switch between different views at runtime. We can set animations on it either in XML with android:inAnimation and android:outAnimation or in Java code with setInAnimation and setOutAnimation. With showPrevious and showNext we can flip between views, or alternatively we can let the ViewFlipper switch views automatically either by calling startFlipping after setting an interval with setFlipInterval, or by setting autoStart to true. With addView we can add dynamically created views to the ViewFlipper in Java code, like a TextView for example

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="tech.codingpoint.viewflipperexample.MainActivity">

    <ViewFlipper
        android:id="@+id/view_flipper"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:inAnimation="@android:anim/slide_in_left"
        android:outAnimation="@android:anim/slide_out_right">

        <Button
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_gravity="center"
            android:text="Button" />

        <ImageView
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_gravity="center"
            android:src="@mipmap/ic_launcher" />

        <LinearLayout
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_gravity="center"
            android:orientation="vertical">

            <TextView
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:text="TextView1"
                android:textSize="20sp" />

            <TextView
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:text="TextView2"
                android:textSize="20sp" />

            <TextView
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:text="TextView3"
                android:textSize="20sp" />

        </LinearLayout>

    </ViewFlipper>

    <Button
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentBottom="true"
        android:layout_alignParentStart="true"
        android:layout_margin="16dp"
        android:onClick="previousView"
        android:text="Previous" />

    <Button
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentBottom="true"
        android:layout_alignParentEnd="true"
        android:layout_margin="16dp"
        android:onClick="nextView"
        android:text="Next" />

</RelativeLayout>

MainActivity.java

package tech.codingpoint.viewflipperexample;

import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.Gravity;
import android.view.View;
import android.widget.TextView;
import android.widget.ViewFlipper;

public class MainActivity extends AppCompatActivity {
    private ViewFlipper viewFlipper;

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

        viewFlipper = findViewById(R.id.view_flipper);
        TextView textView = new TextView(this);
        textView.setText("Dynamically added TextView");
        textView.setGravity(Gravity.CENTER);

        viewFlipper.addView(textView);

        viewFlipper.setFlipInterval(2000);
        viewFlipper.startFlipping();
    }

    public void previousView(View v) {
        viewFlipper.setInAnimation(this, R.anim.slide_in_right);
        viewFlipper.setOutAnimation(this, R.anim.slide_out_left);
        viewFlipper.showPrevious();
    }

    public void nextView(View v) {
        viewFlipper.setInAnimation(this, android.R.anim.slide_in_left);
        viewFlipper.setOutAnimation(this, android.R.anim.slide_out_right);
        viewFlipper.showNext();
    }
}

slide_in_right.xml

<?xml version="1.0" encoding="utf-8"?>
<set xmlns:android="http://schemas.android.com/apk/res/android">
    <translate
        android:duration="@android:integer/config_mediumAnimTime"
        android:fromXDelta="50%p"
        android:toXDelta="0" />
    <alpha
        android:duration="@android:integer/config_mediumAnimTime"
        android:fromAlpha="0.0"
        android:toAlpha="1.0" />
</set>

slide_out_left.xml

<?xml version="1.0" encoding="utf-8"?>
<set xmlns:android="http://schemas.android.com/apk/res/android">
    <translate
        android:duration="@android:integer/config_mediumAnimTime"
        android:fromXDelta="0"
        android:toXDelta="-50%p" />
    <alpha
        android:duration="@android:integer/config_mediumAnimTime"
        android:fromAlpha="1.0"
        android:toAlpha="0.0" />
</set>

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