com.ahamed.sample.common.decorator.ArticleItemDecorator.java Source code

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Here is the source code for com.ahamed.sample.common.decorator.ArticleItemDecorator.java

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/*
 * Copyright 2017 Riyaz Ahamed
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *    http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.ahamed.sample.common.decorator;

import android.annotation.SuppressLint;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Paint;
import android.graphics.Rect;
import android.support.v4.view.ViewCompat;
import android.support.v7.widget.RecyclerView;
import android.view.View;
import com.ahamed.multiviewadapter.util.ItemDecorator;

public class ArticleItemDecorator implements ItemDecorator {

    private final Rect mBounds = new Rect();
    private Paint myPaint = new Paint();

    public ArticleItemDecorator() {
        myPaint.setColor(Color.rgb(240, 240, 240));
    }

    @Override
    public void getItemOffsets(Rect outRect, int position, int positionType) {
        outRect.set(0, 0, 0, 16);
    }

    @Override
    public void onDraw(Canvas canvas, RecyclerView parent, View child, int position, int positionType) {
        if (parent.getLayoutManager() == null) {
            return;
        }
        draw(canvas, parent, child);
    }

    @SuppressLint("NewApi")
    private void draw(Canvas canvas, RecyclerView parent, View child) {
        canvas.save();
        final int left;
        final int right;
        if (parent.getClipToPadding()) {
            left = parent.getPaddingLeft();
            right = parent.getWidth() - parent.getPaddingRight();
            canvas.clipRect(left, parent.getPaddingTop(), right, parent.getHeight() - parent.getPaddingBottom());
        } else {
            left = 0;
            right = parent.getWidth();
        }

        parent.getDecoratedBoundsWithMargins(child, mBounds);
        final int bottom = mBounds.bottom + Math.round(ViewCompat.getTranslationY(child));
        final int top = bottom - 16;

        canvas.drawRect(left, top, right, bottom, myPaint);
        canvas.restore();
    }
}