androidandroid-animationandroid-imageviewimage-rotation

Reputation: 15625

Rotate an Imagewith Animation

The two states of the image

What I Have

I have an arrow image (like the left one). When the user clicks on it, it should rotate 180 degree with an animation and should look like the right one.

What I Have Done

private void rotate(float degree, final int toggleV) {

        final RotateAnimation rotateAnim = new RotateAnimation(0.0f, degree,
                RotateAnimation.RELATIVE_TO_SELF, 0.5f,
                RotateAnimation.RELATIVE_TO_SELF, 0.5f);

        rotateAnim.setDuration(500);
        toggle.startAnimation(rotateAnim);
        rotateAnim.setAnimationListener(new Animation.AnimationListener() {

            @Override
            public void onAnimationStart(Animation animation) {

            }

            @Override
            public void onAnimationEnd(Animation animation) {


                if (toggleV == 1)
                    toggle.setImageResource(R.drawable.toggle_up);
                else
                    toggle.setImageResource(R.drawable.toggle_down);
            }

            @Override
            public void onAnimationRepeat(Animation animation) {

            }
        });
    }

The Problem

I see that the animation works fine but there is a little flicker while setting the image. May be because of the time difference when the animation ends and the image is set.

How can I remove this flicker issue? Do you have any better approach to do this?

Upvotes: 34

Answers (9)

floki1

Reputation: 126

KOTLIN

very efficient and smooth ImageView rotation animation in Kotlin.

After the rotation animation, the ImageView is retained without the need for an animation listener.

imageView.animate().rotation(angle).setDuration(700).setInterpolator(AccelerateDecelerateInterpolator()).start()

Upvotes: 1

Tohid Zamani

Reputation: 92

img_view.animate().rotation(360.0f).setDuration(1000);

Upvotes: 1

Ole Pannier

Reputation: 3683

KOTLIN:

A smooth way to make an expand and collapse animation with only one ImageView:

class MainActivity : AppCompatActivity() {

    var isExpanded = true

    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContentView(R.layout.activity_main)


        val imageView = findViewById<ImageView>(R.id.image_header_toggle)

        imageView.setOnClickListener {
            if (!isExpanded) {
                imageView.animate().apply {
                duration = 500
                rotation(180f)
                isExpanded = true}
            }else{
                imageView.animate().apply {
                duration = 500
                rotation(0f)
                isExpanded = false}
            }
        }
    }
}

Upvotes: 0

CoolMind

Reputation: 28865

If you want to rotate an image by 180 degrees clockwise.

private var isExpanded = true

private fun rotateImage(view: View) {
    val startAngle = if (isExpanded) 0f else 180f
    ObjectAnimator.ofFloat(view, View.ROTATION, startAngle, startAngle + 180f).apply {
        duration = 300
        interpolator = LinearInterpolator()
        start()
    }
    isExpanded = !isExpanded
}

Or more simply (as wrote @Alex.F):

view.animate().setDuration(300).rotationBy(180f).start()

Note that if you rotate the image many times too frequently, it doesn't stop in 0 - 180 - 360 positions. Because if you start a new animation before a previous finished, it will shift an angle.

So, a better way is written in the accepted answer. It doesn't depend on current animation state.

private var angle = 0f

angle += 180f
view.animate().setDuration(300).rotation(angle).start()

Upvotes: 1

Ahamadullah Saikat

Reputation: 4644

Verified Code: (You can follow my solution)

imageView.setImageResource(R.drawable.ic_arrow_up);

boolean up = true;

if (!up) { 
    up = true; 
    imageView.startAnimation(animate(up)); 
} else { 
    up = false; 
    imageView.startAnimation(animate(up)); 
}

private Animation animate(boolean up) {
    Animation anim = AnimationUtils.loadAnimation(this, up ? R.anim.rotate_up : R.anim.rotate_down);
    anim.setInterpolator(new LinearInterpolator()); // for smooth animation
    return anim;
}

drawable/ic_arrow_up.xml

<vector xmlns:android="http://schemas.android.com/apk/res/android"
        android:width="24dp"
        android:height="24dp"
        android:viewportWidth="24.0"
        android:viewportHeight="24.0">
    <path
        android:fillColor="#3d3d3d"
        android:pathData="M7.41,15.41L12,10.83l4.59,4.58L18,14l-6,-6 -6,6z"/>
</vector>

anim/rotate_up.xml

<?xml version="1.0" encoding="utf-8"?>
<set xmlns:android="http://schemas.android.com/apk/res/android"
    android:fillAfter="true"
    android:fillEnabled="true">
    <rotate
        android:duration="200"
        android:fromDegrees="-180"
        android:pivotX="50%"
        android:pivotY="50%"
        android:toDegrees="0" />
</set>

anim/rotate_down.xml

<?xml version="1.0" encoding="utf-8"?>
<set xmlns:android="http://schemas.android.com/apk/res/android"
    android:fillAfter="true"
    android:fillEnabled="true">
    <rotate
        android:duration="200"
        android:fromDegrees="0"
        android:pivotX="50%"
        android:pivotY="50%"
        android:toDegrees="180" />
</set>

I used that code. Because this will save the animation state:

android:fillAfter="true"
android:fillEnabled="true"

Upvotes: 2

Vinay Jayaram

Reputation: 1005

Why dont you use RotateAnimation?

create a folder named anim in res and a file named rotator.xml inside res/anim.

<rotate xmlns:android="http://schemas.android.com/apk/res/android"
android:duration="400"
android:fromDegrees="0"
android:pivotX="50%"
android:pivotY="50%"
android:toDegrees="360"/>

Here one complete rotation will be completed in 4000ms (4 seconds). Now add a PNG image that you want to rotate into your drawable folder. Then open res/main.xml, after removing the default textView in the layout, add an ImageView and Button into the layout. Set the src property of the ImageView as your filename of the added image, for example android:src=”@drawable/myimg” Ok, lets edit the main class. In the onClick() for the button, add the necessary code for running the animation. Check the following code.

public class AnimationActivity extends Activity {

    public ImageView  myImage ;
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        myImage = (ImageView)findViewById(R.id.imageView1);
        final Animation myRotation = AnimationUtils.loadAnimation(getApplicationContext(), R.anim.rotator);
        ((Button)findViewById(R.id.button1)).setOnClickListener(new OnClickListener()    {
            @Override
            public void onClick(View arg0) {
                myImage.startAnimation(myRotation);
            }
        });
    }
}

Upvotes: 2

Zsombor Erdődy-Nagy

Reputation: 16914

First of all, what is you minimum SDK requirement? In case it's at least Android 3.0, you can use the newer animation framework, and animate your Image with something like this:

imageView.animate().rotation(180).start();

About the flicker: I wouldn't reset the source image of the ImageView after the rotation, I'd just leave in the original and make sure that the rotation animation fills after the animation, leaving the image rotated. The flicker is most likely caused by the View's relayout/redraw upon changing the source image.

Further visual artifacts (flicker?) may be caused because the original-rotated image and the rotated static image might differ in a few pixels.

Upvotes: 76