package com.yokmama.learn10.chapter07.lesson33;
import android.content.res.Resources;
import android.graphics.Canvas;
import android.graphics.drawable.Drawable;
import android.support.v7.widget.RecyclerView;
import android.view.View;
/**
* RecyclerViewの罫線を描画するデコレータークラス
*
* Created by yokmama on 15/05/11.
*/
public class DividerItemDecoration extends RecyclerView.ItemDecoration {
private Drawable mDivider;
public DividerItemDecoration(Resources resources) {
//罫線用の画像を取得
mDivider = resources.getDrawable(R.drawable.line_divider);
}
/***
* 罫線を描画
*
* @param c
* @param parent
* @param state
*/
public void onDrawOver(Canvas c, RecyclerView parent, RecyclerView.State state) {
//描画する罫線のパディングの値を取得
int left = parent.getPaddingLeft();
int right = parent.getWidth() - parent.getPaddingRight();
//行の個数分罫線を描画
int childCount = parent.getChildCount();
for (int i = 0; i < childCount; i++) {
View child = parent.getChildAt(i);
RecyclerView.LayoutParams params = (RecyclerView.LayoutParams) child.getLayoutParams();
int top = child.getBottom() + params.bottomMargin;
int bottom = top + mDivider.getIntrinsicHeight();
mDivider.setBounds(left, top, right, bottom);
mDivider.draw(c);
}
}
}