How to create a rotate 3D Animation between a ListView and an ImageView in Android?

By | April 21, 2013

At first we will create a class called “Rotate3dAnimation” which is responsible for the 3D Animation.

The Rotate3dAnimation.java looks like this.

[java]
package com.example.transition3d;

import android.view.animation.Animation;
import android.view.animation.Transformation;
import android.graphics.Camera;
import android.graphics.Matrix;

/**
* An animation that rotates the view on the Y axis between two specified angles.
* This animation also adds a translation on the Z axis (depth) to improve the effect.
*/
public class Rotate3dAnimation extends Animation {
private final float mFromDegrees;
private final float mToDegrees;
private final float mCenterX;
private final float mCenterY;
private final float mDepthZ;
private final boolean mReverse;
private Camera mCamera;

/**
* Creates a new 3D rotation on the Y axis. The rotation is defined by its
* start angle and its end angle. Both angles are in degrees. The rotation
* is performed around a center point on the 2D space, definied by a pair
* of X and Y coordinates, called centerX and centerY. When the animation
* starts, a translation on the Z axis (depth) is performed. The length
* of the translation can be specified, as well as whether the translation
* should be reversed in time.
*
* @param fromDegrees the start angle of the 3D rotation
* @param toDegrees the end angle of the 3D rotation
* @param centerX the X center of the 3D rotation
* @param centerY the Y center of the 3D rotation
* @param reverse true if the translation should be reversed, false otherwise
*/
public Rotate3dAnimation(float fromDegrees, float toDegrees,
float centerX, float centerY, float depthZ, boolean reverse) {
mFromDegrees = fromDegrees;
mToDegrees = toDegrees;
mCenterX = centerX;
mCenterY = centerY;
mDepthZ = depthZ;
mReverse = reverse;
}

@Override
public void initialize(int width, int height, int parentWidth, int parentHeight) {
super.initialize(width, height, parentWidth, parentHeight);
mCamera = new Camera();
}

@Override
protected void applyTransformation(float interpolatedTime, Transformation t) {
final float fromDegrees = mFromDegrees;
float degrees = fromDegrees + ((mToDegrees – fromDegrees) * interpolatedTime);

final float centerX = mCenterX;
final float centerY = mCenterY;
final Camera camera = mCamera;

final Matrix matrix = t.getMatrix();

camera.save();
if (mReverse) {
camera.translate(0.0f, 0.0f, mDepthZ * interpolatedTime);
} else {
camera.translate(0.0f, 0.0f, mDepthZ * (1.0f – interpolatedTime));
}
camera.rotateY(degrees);
camera.getMatrix(matrix);
camera.restore();

matrix.preTranslate(-centerX, -centerY);
matrix.postTranslate(centerX, centerY);
}
}

[/java]

The Matrix class holds a 3×3 matrix for transforming coordinates. Matrix does not have a constructor, so it must be explicitly initialized using either reset() – to construct an identity matrix, or one of the set..() functions (e.g. setTranslate, setRotate, etc.).

Read more about Matrix Classes here.

Now the MainActivity that contains a ListView and an Image.
What we are going to do here is When we click the ListView the ListView will rotate with a 3D Animation and show the Image on the other side.

MainActivity.java
[java]
package com.example.transition3d;

import android.app.Activity;
import android.os.Bundle;
import android.view.View;
import android.view.ViewGroup;
import android.view.animation.AccelerateInterpolator;
import android.view.animation.Animation;
import android.view.animation.DecelerateInterpolator;
import android.widget.AdapterView;
import android.widget.ArrayAdapter;
import android.widget.ImageView;
import android.widget.ListView;

public class MainActivity extends Activity implements
AdapterView.OnItemClickListener, View.OnClickListener {
private ListView mPhotosList;
private ViewGroup mContainer;
private ImageView mImageView;

// Names of the photos we show in the list
private static final String[] PHOTOS_NAMES = new String[] { "Lyon",
"Livermore", "Tahoe Pier", "Lake Tahoe", "Grand Canyon", "Bodie" };

// Resource identifiers for the photos we want to display
private static final int[] PHOTOS_RESOURCES = new int[] {
R.drawable.photo1, R.drawable.photo2, R.drawable.photo3,
R.drawable.photo4, R.drawable.photo5, R.drawable.photo6 };

@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);

setContentView(R.layout.animations_main_screen);

mPhotosList = (ListView) findViewById(android.R.id.list);
mImageView = (ImageView) findViewById(R.id.picture);
mContainer = (ViewGroup) findViewById(R.id.container);

// Prepare the ListView
final ArrayAdapter<String> adapter = new ArrayAdapter<String>(this,
android.R.layout.simple_list_item_1, PHOTOS_NAMES);

mPhotosList.setAdapter(adapter);
mPhotosList.setOnItemClickListener(this);

// Prepare the ImageView
mImageView.setClickable(true);
mImageView.setFocusable(true);
mImageView.setOnClickListener(this);

// Since we are caching large views, we want to keep their cache
// between each animation
mContainer
.setPersistentDrawingCache(ViewGroup.PERSISTENT_ANIMATION_CACHE);
}

/**
* Setup a new 3D rotation on the container view.
*
* @param position
* the item that was clicked to show a picture, or -1 to show the
* list
* @param start
* the start angle at which the rotation must begin
* @param end
* the end angle of the rotation
*/
private void applyRotation(int position, float start, float end) {
// Find the center of the container
final float centerX = mContainer.getWidth() / 2.0f;
final float centerY = mContainer.getHeight() / 2.0f;

// Create a new 3D rotation with the supplied parameter
// The animation listener is used to trigger the next animation
final Rotate3dAnimation rotation = new Rotate3dAnimation(start, end,
centerX, centerY, 310.0f, true);
rotation.setDuration(500);
rotation.setFillAfter(true);
rotation.setInterpolator(new AccelerateInterpolator());
rotation.setAnimationListener(new DisplayNextView(position));

mContainer.startAnimation(rotation);
}

public void onItemClick(AdapterView<?> parent, View v, int position, long id) {
// Pre-load the image then start the animation
mImageView.setImageResource(PHOTOS_RESOURCES[position]);
applyRotation(position, 0, 90);
}

public void onClick(View v) {
applyRotation(-1, 180, 90);
}

/**
* This class listens for the end of the first half of the animation. It
* then posts a new action that effectively swaps the views when the
* container is rotated 90 degrees and thus invisible.
*/
private final class DisplayNextView implements Animation.AnimationListener {
private final int mPosition;

private DisplayNextView(int position) {
mPosition = position;
}

public void onAnimationStart(Animation animation) {
}

public void onAnimationEnd(Animation animation) {
mContainer.post(new SwapViews(mPosition));
}

public void onAnimationRepeat(Animation animation) {
}
}

/**
* This class is responsible for swapping the views and start the second
* half of the animation.
*/
private final class SwapViews implements Runnable {
private final int mPosition;

public SwapViews(int position) {
mPosition = position;
}

public void run() {
final float centerX = mContainer.getWidth() / 2.0f;
final float centerY = mContainer.getHeight() / 2.0f;
Rotate3dAnimation rotation;

if (mPosition > -1) {
mPhotosList.setVisibility(View.GONE);
mImageView.setVisibility(View.VISIBLE);
mImageView.requestFocus();

rotation = new Rotate3dAnimation(90, 180, centerX, centerY,
310.0f, false);
} else {
mImageView.setVisibility(View.GONE);
mPhotosList.setVisibility(View.VISIBLE);
mPhotosList.requestFocus();

rotation = new Rotate3dAnimation(90, 0, centerX, centerY,
310.0f, false);
}

rotation.setDuration(500);
rotation.setFillAfter(true);
rotation.setInterpolator(new DecelerateInterpolator());

mContainer.startAnimation(rotation);
}
}

}

[/java]

Now the layout for the MainActivity.java

animations_main_screen.xml

[xml]
<?xml version="1.0" encoding="utf-8"?>
<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/container"
android:layout_width="match_parent"
android:layout_height="match_parent">

<ListView
android:id="@android:id/list"
android:persistentDrawingCache="animation|scrolling"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layoutAnimation="@anim/layout_bottom_to_top_slide" />

<ImageView
android:id="@+id/picture"
android:scaleType="fitCenter"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:visibility="gone" />

</FrameLayout>
[/xml]

Now we have some XML files for the animation of the ListView when it loads.
Here we are applying a bottom to top slide animation in the ListView when it loads.
So for that you have to first create a folder named “anim” in the “res” folder and create an XML named “layout_bottom_to_top_slide.xml” inside it.

layout_bottom_to_top_slide.xml
[xml]
<?xml version="1.0" encoding="utf-8"?>
<layoutAnimation xmlns:android="http://schemas.android.com/apk/res/android"
android:delay="50%"
android:animationOrder="reverse"
android:animation="@anim/slide_right" />
[/xml]

Now you will get an error at this line.
[xml]android:animation="@anim/slide_right" [/xml]

So for that we create another animation. Create another XML inside the same “anim” folder, but now it is named “slide_right.xml”

slide_right.xml
[xml]
<?xml version="1.0" encoding="utf-8"?>
<set xmlns:android="http://schemas.android.com/apk/res/android" android:interpolator="@android:anim/accelerate_interpolator">
<translate android:fromXDelta="-100%p" android:toXDelta="0"
android:duration="@android:integer/config_shortAnimTime" />
</set>
[/xml]

This is the translate animation that slides each row in the ListView.

Make sure you have six sample images with the named “photo1.jpg or png” , photo2.jpg etc…

Download the complete Android sample source code from here.

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3 thoughts on “How to create a rotate 3D Animation between a ListView and an ImageView in Android?

  1. Pingback: Different types of Animation – Push Up in, Push Up Out, Push Left in, Push Left Out, HyperSpace In, HyperSpace Out in a ViewFlipper in Android. | CoderzHeaven

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