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I'm trying to perform a smooth transition (expand/collapse) on my LinearLayout through Animation. Here's the code that i'm using for the animation:

Animation anim = new Animation(){
    @Override
    protected void applyTransformation(float interpolatedTime, Transformation t){
        super.applyTransformation(interpolatedTime, t);
        layout.getLayoutParams().height = (int)(84*interpolatedTime);
        layout.requestLayout();
    }
};

The problem is that the expand/collapse animation works fine but the layout itself doesn't appear correctly once the animation is done. That following gray gradient block is how it looks like (instead of a textview and edittext):

improper layout rendering

Even though i'm calling layout.requestLayout(); but still it doesnt refresh the drawing of layout at each interpolatedTime time. Is there something i'm missing here?

P.S. The reason why i'm using 84 when setting height is because I know the rendered height of my layout and it is statically defined only during the test/debugging process.

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1 に答える 1

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I think i've figured out! The key answer is to set your view's height to LayoutParams.WRAP_CONTENT once the interpolatedTime time is equal to 1. For example:

if(interpolatedTime == 1)
     layout.getLayoutParams().height = LayoutParams.WRAP_CONTENT;
else
     layout.getLayoutParams().height = (int)(84 * interpolatedTime);

Note: here 84 is the height of my view and practically it should be retrieved dynamically using layout.getMeasuredHeight()

于 2013-02-17T04:50:27.117 に答える