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

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Here is the source code for com.ahamed.sample.common.decorator.ThickItemDecorator.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.content.Context;
import android.content.res.TypedArray;
import android.graphics.Canvas;
import android.graphics.Rect;
import android.graphics.drawable.Drawable;
import android.support.v4.view.ViewCompat;
import android.support.v7.widget.RecyclerView;
import android.view.View;
import com.ahamed.multiviewadapter.util.ItemDecorator;

public class ThickItemDecorator implements ItemDecorator {

    private static final int[] ATTRS = new int[] { android.R.attr.listDivider };
    private final Rect mBounds = new Rect();
    private Drawable mDivider;

    public ThickItemDecorator(Context context) {
        final TypedArray a = context.obtainStyledAttributes(ATTRS);
        mDivider = a.getDrawable(0);
        a.recycle();
    }

    @Override
    public void getItemOffsets(Rect outRect, int position, int positionType) {
        if (positionType == POSITION_LAST_ITEM) {
            return;
        }
        outRect.set(0, 0, 0, mDivider.getIntrinsicHeight() * 4);
    }

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

    @SuppressLint("NewApi")
    private void drawVertical(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 - mDivider.getIntrinsicHeight() * 4;
        mDivider.setBounds(left, top, right, bottom);
        mDivider.draw(canvas);
        canvas.restore();
    }
}