侧滑效果[第六篇]：侧滑框架SmartSwipe之弹性拉伸效果

弹性拉伸，即侧滑时，视图有被拉伸的效果。

首先看一下弹性拉伸效果：

代码如下：

StretchConsumer.java

/**
 * @author billy.qi
 */
public class StretchConsumer extends SwipeConsumer {

    @Override
    public void onDetachFromWrapper() {
        super.onDetachFromWrapper();
        View contentView = mWrapper.getContentView();
        if (contentView != null) {
            contentView.setScaleX(1);
            contentView.setScaleY(1);
            contentView.setTranslationX(0);
            contentView.setTranslationY(0);
        }
    }

    @Override
    public void onDisplayDistanceChanged(int distanceXToDisplay, int distanceYToDisplay, int dx, int dy) {
        View contentView = mWrapper.getContentView();
        if (contentView != null) {
            if (distanceXToDisplay >= 0 && isLeftEnable() || distanceXToDisplay <= 0 && isRightEnable()) {
                contentView.setScaleX(1 + Math.abs((float) distanceXToDisplay) / mWidth);
                contentView.setTranslationX(distanceXToDisplay / 2F);
            }
            if (distanceYToDisplay >= 0 && isTopEnable() || distanceYToDisplay <= 0 && isBottomEnable()) {
                contentView.setScaleY(1 + Math.abs((float) distanceYToDisplay) / mHeight);
                contentView.setTranslationY(distanceYToDisplay / 2F);
            }
        }
    }

}

为Recycleview的Item添加横向拉伸效果

@Override
public ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
    View itemView = LayoutInflater.from(mContext).inflate(R.layout.recycleview_item, parent, false);
    ViewHolder holder = new ViewHolder(SmartSwipe.wrap(itemView).addConsumer(new StretchConsumer()).enableHorizontal().getWrapper());
    return holder;
}

为Recycleview本身添加纵向拉伸效果

    SmartSwipe.wrap(mRecyclerView).addConsumer(new StretchConsumer()).enableVertical();

有关SmartSwipe框架的弹性拉伸方向，有：

• 仅上方

SmartSwipe.wrap(mRecyclerView).addConsumer(new StretchConsumer()).enableTop();

• 仅下方

    SmartSwipe.wrap(mRecyclerView).addConsumer(new StretchConsumer()).enableBottom();
  

• 仅左方

    SmartSwipe.wrap(mRecyclerView).addConsumer(new StretchConsumer()).enableLeft();
  

• 仅右方

    SmartSwipe.wrap(mRecyclerView).addConsumer(new StretchConsumer()).enableRight();
  

• 水平方向

    SmartSwipe.wrap(mRecyclerView).addConsumer(new StretchConsumer()).enableHorizontal();
  

• 垂直方向

    SmartSwipe.wrap(mRecyclerView).addConsumer(new StretchConsumer()).enableVertical();
  

• 所有方向

    SmartSwipe.wrap(mRecyclerView).addConsumer(new StretchConsumer()).enableAllDirections();
  

[本章完...]