Monday, April 8, 2013

[android help] How to scale a button from right to left, android animation


You need to set the starting point to the middle right, you also need to set the duration of the animation like this:



ScaleAnimation anim = new ScaleAnimation(0.0f, 1.0f, 1.0f, 1.0f, Animation.RELATIVE_TO_SELF,1.0f, Animation.RELATIVE_TO_SELF, 0.5f));
anim.setDuration(700);
view.startAnimation(anim);


in your case the Y start location is not important.


if you don't get it read about this constructor:



public ScaleAnimation (float fromX, float toX, float fromY, float toY, int pivotXType, float pivotXValue, int pivotYType, float pivotYValue)


Since: API Level 1


Constructor to use when building a ScaleAnimation from code


Parameters:


fromX: Horizontal scaling factor to apply at the start of the animation


toX: Horizontal scaling factor to apply at the end of the animation


fromY: Vertical scaling factor to apply at the start of the animation


toY: Vertical scaling factor to apply at the end of the animation


pivotXType: Specifies how pivotXValue should be interpreted. One of Animation.ABSOLUTE, Animation.RELATIVE_TO_SELF, or Animation.RELATIVE_TO_PARENT.


pivotXValue: The X coordinate of the point about which the object is being scaled, specified as an absolute number where 0 is the left edge. (This point remains fixed while the object changes size.) This value can either be an absolute number if pivotXType is ABSOLUTE, or a percentage (where 1.0 is 100%) otherwise.


pivotYType: Specifies how pivotYValue should be interpreted. One of Animation.ABSOLUTE, Animation.RELATIVE_TO_SELF, or Animation.RELATIVE_TO_PARENT.


pivotYValue: The Y coordinate of the point about which the object is being scaled, specified as an absolute number where 0 is the top edge. (This point remains fixed while the object changes size.) This value can either be an absolute number if pivotYType is ABSOLUTE, or a percentage (where 1.0 is 100%) otherwise.




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stackoverflow.comm

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