com.geekandroid.sdk.DividerItemDecoration.java Source code

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Here is the source code for com.geekandroid.sdk.DividerItemDecoration.java

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/*******************************************************************************
 *
 * Copyright (c) 2016 Mickael Gizthon . All rights reserved. Email:2013mzhou@gmail.com
 *
 * 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.geekandroid.sdk;

import android.content.Context;
import android.graphics.Canvas;
import android.graphics.Paint;
import android.support.annotation.ColorInt;
import android.support.annotation.ColorRes;
import android.support.annotation.DimenRes;
import android.support.annotation.NonNull;
import android.support.v4.content.ContextCompat;
import android.support.v7.widget.RecyclerView;
import android.view.View;

/**
 * A {@link RecyclerView.ItemDecoration} which draws dividers (along the right & bottom)
 * for certain {@link RecyclerView.ViewHolder} types.
 */
public class DividerItemDecoration extends RecyclerView.ItemDecoration {

    private final float dividerSize;
    private final Paint paint;
    public static final int GRIDE_VIEW = 0;
    public static final int LIST_VIEW = 1;
    private int dividerType;

    public DividerItemDecoration(Context context) {
        this(1, ContextCompat.getColor(context, R.color.divider), DividerItemDecoration.LIST_VIEW);
    }

    public DividerItemDecoration(Context context, int dividerType) {
        this(1, ContextCompat.getColor(context, R.color.divider), dividerType);
    }

    public DividerItemDecoration(@NonNull Context context, @DimenRes int dividerSizeResId,
            @ColorRes int dividerColorResId, int dividerType) {
        this(context.getResources().getDimensionPixelSize(dividerSizeResId),
                ContextCompat.getColor(context, dividerColorResId), dividerType);
    }

    public DividerItemDecoration(float dividerSize, @ColorInt int dividerColor, int dividerType) {

        this.dividerSize = dividerSize;
        paint = new Paint();
        paint.setColor(dividerColor);
        paint.setStyle(Paint.Style.FILL);
        this.dividerType = dividerType;
    }

    @Override
    public void onDrawOver(Canvas canvas, RecyclerView parent, RecyclerView.State state) {
        if (parent.isAnimating())
            return;

        final int childCount = parent.getChildCount();
        final RecyclerView.LayoutManager lm = parent.getLayoutManager();

        for (int i = 0; i < childCount; i++) {

            final View child = parent.getChildAt(i);
            RecyclerView.ViewHolder viewHolder = parent.getChildViewHolder(child);
            final int right = lm.getDecoratedRight(child);
            final int bottom = lm.getDecoratedBottom(child);

            // draw the bottom divider
            canvas.drawRect(lm.getDecoratedLeft(child), bottom - dividerSize, right, bottom, paint);

            if (dividerType == DividerItemDecoration.GRIDE_VIEW) {
                // draw the right edge divider
                canvas.drawRect(right - dividerSize, lm.getDecoratedTop(child), right, bottom - dividerSize, paint);
            }
        }
    }

    private boolean requiresDivider(RecyclerView.ViewHolder viewHolder) {

        return true;
    }

}