How to make Rotate3dAnimation more smoother?

Question

In my app I am using Rotate3dAnimation to show a Google map. The code is working fine, but the animation is not smooth, some lines are also visible while rotating the view.

Answer 1

I have made the animation like this. I had the same problems. So, suggestions:

• make xml layout as simple as possible, you can test it using Hierarchy View tool in android. It tool shows the time of building and drawing the laoyuts;

• images on layout should have so low weight as possible;

• use hardware acceleration if your device supports it (in manifest):

• I have noticed one more interesing behavior. If I call some code in onAnimationEnd(Animation animation) method, the animation freezes for a short time. This problem I was solved using next construction:

  private static final int DELAY_AFTER_ANIMATION = 10;

  public void onAnimationEnd(Animation animation) { new Handler().postDelayed(new Runnable() { @Override public void run() { setData(); // do the heavy code here } }, DELAY_AFTER_ANIMATION); }

To construct animation I used the same code (Rotate3dAnimation). For calling animation(main difference is using the isReverse parameter):

public void apply3dRotation(float start, float end, AnimationListener listener, boolean isReverse) {
    View view = getRotateView();
    if(view == null){
        return;
    }

    if (isHardwareAcceleartionNotSupported()){
        AndroidHelper.disableHardwareAccelerationOnView(view, this.getClass());
    }

    final float centerX = view.getWidth() / 2.0f;
    final float centerY = view.getHeight() / 2.0f;

    Flip3dAnimation rotation;

    rotation = new Flip3dAnimation(start, end, centerX, centerY, 310.0f, isReverse);
    rotation.setDuration(ANIMATION_DURATION);
    rotation.setFillAfter(true);
    rotation.setInterpolator(new AccelerateInterpolator());

    if(listener != null){
        rotation.setAnimationListener(listener);
    }

    view.startAnimation(rotation);
}

isHardwareAcceleartionNotSupported() method checks the OS version. In my project I disabled acceleration for smartphones. In AndroidHelper class:

public static void disableHardwareAccelerationOnView(View view, Class c){
    try {
        view.setLayerType(View.LAYER_TYPE_SOFTWARE, null);
    } catch (Error e) {
        Log.i(c.getSimpleName(), e.getMessage());
    }
}

And one problem yet. If the animation hides when screen rotates to 90 degrees, it's a problem of a camera. In this case we should to place image farther from the spectator.

• And one more trick - sometimes I set the pause before animation start:

    animation.setStartOffset(100);