translate ViewGroup - Android User Interface

Android examples for User Interface:ViewGroup

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Description

translate ViewGroup

Demo Code


import android.view.View;
import android.view.ViewGroup;

public class Main{
    public static void translateViewGroup(ViewGroup parent, float position,
            boolean scrollToLeft, boolean scrollToRight) {
        int w = parent.getMeasuredWidth() - parent.getPaddingLeft()
                - parent.getPaddingRight();
        int n = parent.getChildCount();
        float percent;

        if (position >= 0 && scrollToRight) {
            for (int i = 0; i < n; ++i) {
                View child = parent.getChildAt(i);
                float dx = 1.0f * (i + 1) * w / n;
                percent = AmazingUtil.getPercent(i, n, 1 - position);
                child.setTranslationX(dx * (1 - percent));
            }//w  w  w. j  a v  a  2s  .co m
        }

        if (position <= 0 && scrollToLeft) {
            for (int i = 0; i < n; ++i) {
                View child = parent.getChildAt(i);
                float dx = 1.0f * (i + 1) * w / n;
                percent = AmazingUtil.getPercent(i, n, 1 + position);
                child.setTranslationX(dx * (percent - 1));
            }
        }
    }
    public static float getPercent(int i, int n, float p) {
        float end = 1.0f * (i + 1) / n;
        if (p <= 0) {
            return 0;
        }

        if (p >= end) {
            return 1;
        }

        return p / end;
    }
}

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