I have a spinning wheel, which is an ImageView, in my app, and the animation is working well, but the issue is for just a split second it snaps back to it's original position (0 degree rotation). The .gif below shows what I am talking about.
The last split second of the rotation it has that awkward snap back that makes the animation look extremely unsmooth.
I am looking for a way to fix this but I cannot quite figure it out. This is my code right now that animates the ImageView and rotates it to the final position of the animation
ImageView readyButton = findViewById(R.id.spinnerready);
final ImageView spinnerSpin = findViewById(R.id.spinnerspin);
final Animation animRotate = new RotateAnimation(ROTATE_FROM, ROTATE_TO, Animation.RELATIVE_TO_SELF, 0.5f, Animation.RELATIVE_TO_SELF, 0.5f);
animRotate.setDuration(5000);
animRotate.setRepeatCount(0);
readyButton.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
float newDeg = ROTATE_TO;
spinnerSpin.startAnimation(animRotate);
spinnerSpin.postDelayed(new Runnable() {
#Override
public void run() {
spinnerSpin.setRotation(ROTATE_TO);
}
}, 5000);
while(newDeg > 360) {
newDeg = newDeg - 360;
}
}
});
I have also tried changing the delay of the rotation to 4500 instead of 5000 but the issue is not fixed. Is there a way to eliminate the ImageView from going back to its original position after the animation?
Related
I'm trying to have two animations occur in one activity with the first happening first and only once it's done, does the second start. The ObjectAnimator moves the imageView up the screen using the .ofFloat() method and then I want a loading animation which loops through several image files to create a loading-like effect.
This is my code:
//Animations
final Handler handler = new Handler(Looper.getMainLooper());
handler.postDelayed(new Runnable()
{
#Override
public void run()
{
//Change cloud from sleeping to awake/happy
g2ndSleepingClouds.setBackgroundResource(R.drawable.clouds_happy_formatted);
//Move image view 250 pixels up the screen vertically
ObjectAnimator animation1 = ObjectAnimator.ofFloat(g2ndSleepingClouds, "translationY", -250f);
animation1.setDuration(1000);
animation1.start();
//Loading animation
loadingImageView.setBackgroundResource(R.drawable.loading_1);
loadingAnimation = (AnimationDrawable) loadingImageView.getBackground();
loadingAnimation.stop();
loadingAnimation.start();
}
}, 1000);
The error I get in Logcat is:
"android.graphics.drawable.BitmapDrawable cannot be cast to android.graphics.drawable.AnimationDrawable"
Any help?
I have an animation that slides across the screen, while the animation is playing I want it to disapear if it has been clicked!
I have tried to use OnClickListener() and also OnClickMethods, both only work after the animation has finished playing!
TranslateAnimation animation = new TranslateAnimation(answer, answer, 0, height * -1); // xfrom , xto, y from,y to
animation.setDuration(5000);
Floater0.startAnimation(animation);
animation.setAnimationListener(new Animation.AnimationListener() {
#Override
public void onAnimationStart(Animation animation) {
}
#Override
public void onAnimationRepeat(Animation animation) {
}
#Override
public void onAnimationEnd(Animation animation) {
if (AdPlayer0.isPlaying()) {
answer = rn.nextInt(width) + 1; //useless
TranslateAnimation animation0 = new TranslateAnimation(answer, answer, 0, height * -1); // xfrom , xto, y from,y to
animation0.setDuration(5000);
animation0.setFillEnabled(true);
Floater1.startAnimation(animation0);
Floater1.setVisibility(View.VISIBLE);
Floater0.startAnimation(animation);
}
}
});
I was reading the answer here and something interesting was mentioned:
Animations do NOT effect the 'physical' location of the views on screen. If you want it to actually move then you need to adjust the properties of the view.
I have now tested the above quote, and it seems to be true! I have also looked into how to adjust the position properties of the view after the animation has ended, however I want to change its position before an animation has ended(While its playing)!
Any suggestions for a work around? ideally I would want to change the physical position of the view while the animation is played!
A TranslationAnimation only moves the pixels on the screen, so an OnClickListener does not animate with it. Use ViewPropertyAnimator instead and set an OnClickListener then it should work.
The code would look something like this :
Floater1.animate().setDuration(5000).translationX(answer).translationY(height * -1);
Check out all the available methods in the docs.
Edit/Update :
.translationX(float toX)
means -> animate the view to this point on the x axis.
The animation always starts at the current position of the view, so you don't need a fromX. There are also other methods which you can use :
.translationXBy(float byX)
.translationYBy(float byY)
With these you can translate the view BY the float value, and not TO a certain point on the screen.
I have a button that I want to put on a 45 degree angle. For some reason I can't get this to work.
Can someone please provide the code to accomplish this?
API 11 added a setRotation() method to all views.
You could create an animation and apply it to your button view. For example:
// Locate view
ImageView diskView = (ImageView) findViewById(R.id.imageView3);
// Create an animation instance
Animation an = new RotateAnimation(0.0f, 360.0f, pivotX, pivotY);
// Set the animation's parameters
an.setDuration(10000); // duration in ms
an.setRepeatCount(0); // -1 = infinite repeated
an.setRepeatMode(Animation.REVERSE); // reverses each repeat
an.setFillAfter(true); // keep rotation after animation
// Aply animation to image view
diskView.setAnimation(an);
Extend the TextView class and override the onDraw() method. Make sure the parent view is large enough to handle the rotated button without clipping it.
#Override
protected void onDraw(Canvas canvas) {
canvas.save();
canvas.rotate(45,<appropriate x pivot value>,<appropriate y pivot value>);
super.onDraw(canvas);
canvas.restore();
}
I just used the simple line in my code and it works :
myCusstomView.setRotation(45);
Hope it works for you.
One line in XML
<View
android:rotation="45"
... />
Applying a rotation animation (without duration, thus no animation effect) is a simpler solution than either calling View.setRotation() or override View.onDraw method.
// substitude deltaDegrees for whatever you want
RotateAnimation rotate = new RotateAnimation(0f, deltaDegrees,
Animation.RELATIVE_TO_SELF, 0.5f, Animation.RELATIVE_TO_SELF, 0.5f);
// prevents View from restoring to original direction.
rotate.setFillAfter(true);
someButton.startAnimation(rotate);
Rotating view with rotate() will not affect your view's measured size. As result, rotated view be clipped or not fit into the parent layout. This library fixes it though:
https://github.com/rongi/rotate-layout
Joininig #Rudi's and #Pete's answers. I have created an RotateAnimation that keeps buttons functionality also after rotation.
setRotation() method preserves buttons functionality.
Code Sample:
Animation an = new RotateAnimation(0.0f, 180.0f, mainLayout.getWidth()/2, mainLayout.getHeight()/2);
an.setDuration(1000);
an.setRepeatCount(0);
an.setFillAfter(false); // DO NOT keep rotation after animation
an.setFillEnabled(true); // Make smooth ending of Animation
an.setAnimationListener(new AnimationListener() {
#Override
public void onAnimationStart(Animation animation) {}
#Override
public void onAnimationRepeat(Animation animation) {}
#Override
public void onAnimationEnd(Animation animation) {
mainLayout.setRotation(180.0f); // Make instant rotation when Animation is finished
}
});
mainLayout.startAnimation(an);
mainLayout is a (LinearLayout) field
As mentioned before, the easiest way it to use rotation available since API 11:
android:rotation="90" // in XML layout
view.rotation = 90f // programatically
You can also change pivot of rotation, which is by default set to center of the view. This needs to be changed programatically:
// top left
view.pivotX = 0f
view.pivotY = 0f
// bottom right
view.pivotX = width.toFloat()
view.pivotY = height.toFloat()
...
In Activity's onCreate() or Fragment's onCreateView(...) width and height are equal to 0, because the view wasn't measured yet. You can access it simply by using doOnPreDraw extension from Android KTX, i.e.:
view.apply {
doOnPreDraw {
pivotX = width.toFloat()
pivotY = height.toFloat()
}
}
if you wish to make it dynamically with an animation:
view.animate()
.rotation(180)
.start();
THATS IT
#Ichorus's answer is correct for views, but if you want to draw rotated rectangles or text, you can do the following in your onDraw (or onDispatchDraw) callback for your view:
(note that theta is the angle from the x axis of the desired rotation, pivot is the Point that represents the point around which we want the rectangle to rotate, and horizontalRect is the rect's position "before" it was rotated)
canvas.save();
canvas.rotate(theta, pivot.x, pivot.y);
canvas.drawRect(horizontalRect, paint);
canvas.restore();
fun rotateArrow(view: View): Boolean {
return if (view.rotation == 0F) {
view.animate().setDuration(200).rotation(180F)
true
} else {
view.animate().setDuration(200).rotation(0F)
false
}
}
That's simple,
in Java
your_component.setRotation(15);
or
your_component.setRotation(295.18f);
in XML
<Button android:rotation="15" />
I was making this simple and cool looking animation.
And using this question - How to spin an android icon on its center point? I got my icon to rotate. But after the rotation I wish to move the image view upwards. How can I achieve this?
I'm using this code to move the imageview upwards.
TranslateAnimation animation = new TranslateAnimation(0, 0, 0, -700);
animation.setDuration(1*1500);
animation.setRepeatCount(0);
ImageButton logo_icon_two = (ImageButton) findViewById(R.id.logo_icon);
logo_icon_two.startAnimation(animation);
The problem is that when I add the code, the image view moves up but then goes back to the spot it was in, also the rotation animation stops. My full class below -
public class WelcomeActivity extends Activity {
private static final float ROTATE_FROM = 0.0f;
private static final float ROTATE_TO = -10.0f * 360.0f;// 3.141592654f * 32.0f;
/** Called when the activity is first created. */
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.welcome_activity);
ImageButton logo_icon = (ImageButton) findViewById(R.id.logo_icon);
RotateAnimation r; // = new RotateAnimation(ROTATE_FROM, ROTATE_TO);
r = new RotateAnimation(ROTATE_FROM, ROTATE_TO, Animation.RELATIVE_TO_SELF, 0.5f, Animation.RELATIVE_TO_SELF, 0.5f);
r.setDuration((long) 1*1500);
r.setRepeatCount(0);
logo_icon.startAnimation(r);
TranslateAnimation animation = new TranslateAnimation(0, 0, 0, -700);
animation.setDuration(1*1500);
animation.setRepeatCount(0);
ImageButton logo_icon_two = (ImageButton) findViewById(R.id.logo_icon);
logo_icon_two.startAnimation(animation);
}
}
Question is, how can I make it that, when opening app. the image rotates and then stops, and then the image is then moved up.
You have to call setFillAfter(true) method for both your animations, and if necessary, change the layoutparams of imageview after animation end then invalidate once.
I have one big problem. I use this code to animate ImageView to horizontal move one ImageView from current X position to 0.
Here is the animation code
translate = new TranslateAnimation(0, translateX, 0, 0);
translate.setDuration(400);
translate.setAnimationListener(new AnimationListener() {
public void onAnimationEnd(Animation animation) {
txtTitle.setText(String.format("Translate: %d %d", translateX, lpView1.leftMargin));
lpView1.leftMargin = 0;
mainSwitchBtn.setLayoutParams(lpView1);
}
public void onAnimationRepeat(Animation animation) {
}
public void onAnimationStart(Animation animation) {
}
});
translate.reset();
translate.setFillAfter(false);
mainSwitchBtn.clearAnimation();
mainSwitchBtn.startAnimation(translate);
When animation is ended, I have moved ImageView to 0. At that I see flicker of ImageView. I do not know what is a problem. Can some one help me?
EDIT: Founded Problem
I have founded what is a problem in my code.
I have replaced this code
mainSwitchBtn.setLayoutParams(lpView1);
With this
mainSwitchBtn.layout(0, 0, 0, 0);
I do not know what is a difference between setting margins in layout params and set params to view object or use .layout function but now I have not flickering.
It seems like animation ends and your imageview returning to original non-animated image, maybe you should try to use HorizontalScrollView instead of animation