Forked from AviBenHamo/DividerItemDecoration.java
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DividerItemDecoration updated with grid support and without deprecation
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/* | |
* Copyright (C) 2014 The Android Open Source Project | |
* | |
* 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. | |
* | |
* Grid support was added by Avi Ben - Hamo | |
* Deprecated methods replaced - Justin Hall | |
*/ | |
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.v7.widget.LinearLayoutManager; | |
import android.support.v7.widget.RecyclerView; | |
import android.view.View; | |
public class DividerItemDecoration extends RecyclerView.ItemDecoration { | |
private static final int[] ATTRS = new int[]{ | |
android.R.attr.listDivider | |
}; | |
public static final int LIST_HORIZONTAL = LinearLayoutManager.HORIZONTAL; | |
public static final int LIST_VERTICAL = LinearLayoutManager.VERTICAL; | |
public static final int GRID_STROKE = 3; | |
public static final int GRID_FILL = 4; | |
private Drawable mDivider; | |
private int mOrientation; | |
public DividerItemDecoration(Context context, int orientation) { | |
final TypedArray a = context.obtainStyledAttributes(ATTRS); | |
mDivider = a.getDrawable(0); | |
a.recycle(); | |
setOrientation(orientation); | |
} | |
public void setOrientation(int orientation) { | |
if (orientation != LIST_HORIZONTAL && | |
orientation != LIST_VERTICAL && | |
orientation != GRID_STROKE && | |
orientation != GRID_FILL) { | |
throw new IllegalArgumentException("Invalid orientation."); | |
} | |
mOrientation = orientation; | |
} | |
@Override | |
public void onDraw(Canvas c, RecyclerView parent, RecyclerView.State state) { | |
switch (mOrientation) { | |
case LIST_VERTICAL: | |
drawVertical(c, parent); | |
break; | |
case LIST_HORIZONTAL: | |
drawHorizontal(c, parent); | |
break; | |
case GRID_FILL: | |
drawGridFill(c, parent); | |
break; | |
case GRID_STROKE: | |
drawGridStroke(c, parent); | |
break; | |
default: | |
throw new IllegalArgumentException("Invalid orientation."); | |
} | |
} | |
public void drawVertical(Canvas c, RecyclerView parent) { | |
final int left = parent.getPaddingLeft(); | |
final int right = parent.getWidth() - parent.getPaddingRight(); | |
final int childCount = parent.getChildCount(); | |
for (int i = 0; i < childCount; i++) { | |
final View child = parent.getChildAt(i); | |
final RecyclerView.LayoutParams params = (RecyclerView.LayoutParams) child | |
.getLayoutParams(); | |
final int top = child.getBottom() + params.bottomMargin; | |
final int bottom = top + mDivider.getIntrinsicHeight(); | |
mDivider.setBounds(left, top, right, bottom); | |
mDivider.draw(c); | |
} | |
} | |
public void drawHorizontal(Canvas c, RecyclerView parent) { | |
final int top = parent.getPaddingTop(); | |
final int bottom = parent.getHeight() - parent.getPaddingBottom(); | |
final int childCount = parent.getChildCount(); | |
for (int i = 0; i < childCount; i++) { | |
final View child = parent.getChildAt(i); | |
final RecyclerView.LayoutParams params = (RecyclerView.LayoutParams) child | |
.getLayoutParams(); | |
final int left = child.getRight() + params.rightMargin; | |
final int right = left + mDivider.getIntrinsicHeight(); | |
mDivider.setBounds(left, top, right, bottom); | |
mDivider.draw(c); | |
} | |
} | |
public void drawGridStroke(Canvas c, RecyclerView parent) { | |
final int childCount = parent.getChildCount(); | |
for (int i = 0; i < childCount; i++) { | |
final View child = parent.getChildAt(i); | |
final RecyclerView.LayoutParams params = (RecyclerView.LayoutParams) child | |
.getLayoutParams(); | |
final int left = child.getLeft() - params.leftMargin; | |
final int right = child.getRight() + params.rightMargin; | |
final int top = child.getTop() - params.topMargin; | |
final int bottom = child.getBottom() + params.bottomMargin; | |
mDivider.setBounds(left, top, left + mDivider.getIntrinsicHeight(), bottom); | |
mDivider.draw(c); | |
mDivider.setBounds(right - mDivider.getIntrinsicHeight(), top, right, bottom); | |
mDivider.draw(c); | |
mDivider.setBounds(left, top, right, top + mDivider.getIntrinsicHeight()); | |
mDivider.draw(c); | |
mDivider.setBounds(left, bottom - mDivider.getIntrinsicHeight(), right, bottom); | |
mDivider.draw(c); | |
mDivider.draw(c); | |
} | |
} | |
public void drawGridFill(Canvas c, RecyclerView parent) { | |
final int childCount = parent.getChildCount(); | |
for (int i = 0; i < childCount; i++) { | |
final View child = parent.getChildAt(i); | |
final RecyclerView.LayoutParams params = (RecyclerView.LayoutParams) child | |
.getLayoutParams(); | |
final int left = child.getLeft() - params.leftMargin; | |
final int right = child.getRight() + params.rightMargin; | |
final int top = child.getTop() - params.topMargin; | |
final int bottom = child.getBottom() + params.bottomMargin; | |
mDivider.setBounds(left, top, right, bottom); | |
mDivider.draw(c); | |
} | |
} | |
@Override | |
public void getItemOffsets(Rect outRect, View view, RecyclerView parent, | |
RecyclerView.State state) { | |
switch (mOrientation) { | |
case LIST_VERTICAL: | |
outRect.set(0, 0, 0, mDivider.getIntrinsicHeight()); | |
break; | |
case LIST_HORIZONTAL: | |
outRect.set(0, 0, mDivider.getIntrinsicWidth(), 0); | |
break; | |
case GRID_FILL: | |
outRect.set(mDivider.getIntrinsicWidth(), mDivider.getIntrinsicWidth(), | |
mDivider.getIntrinsicWidth(), mDivider.getIntrinsicWidth()); | |
break; | |
case GRID_STROKE: | |
outRect.set(0, 0, 0, 0); | |
break; | |
default: | |
throw new IllegalArgumentException("Invalid orientation."); | |
} | |
} | |
} |
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