1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
|
package com.mapswithme.maps.widget.recycler;
import android.graphics.Canvas;
import android.graphics.Rect;
import android.graphics.drawable.Drawable;
import android.support.annotation.NonNull;
import android.support.v7.widget.RecyclerView;
import android.view.View;
/**
* Adds interior dividers to a RecyclerView with a TagLayoutManager or its
* subclass.
*/
public class TagItemDecoration extends RecyclerView.ItemDecoration
{
@NonNull
private final Drawable mDivider;
public TagItemDecoration(@NonNull Drawable divider)
{
mDivider = divider;
}
/**
* Draws horizontal and vertical dividers onto the parent RecyclerView.
*
* @param canvas The {@link Canvas} onto which dividers will be drawn
* @param parent The RecyclerView onto which dividers are being added
* @param state The current RecyclerView.State of the RecyclerView
*/
@Override
public void onDraw(Canvas canvas, RecyclerView parent, RecyclerView.State state)
{
if (state.isMeasuring())
return;
int parentRight = parent.getWidth() - parent.getPaddingRight();
int parentLeft = parent.getPaddingLeft();
int lastHeight = Integer.MIN_VALUE;
int childCount = parent.getChildCount();
for (int i = 0; i < childCount; i++)
{
View child = parent.getChildAt(i);
if (child.getTop() <= lastHeight)
{
mDivider.setBounds(child.getLeft() - mDivider.getIntrinsicWidth(),
child.getTop(),
child.getLeft(),
child.getBottom());
}
else
{
mDivider.setBounds(parentLeft,
child.getTop() - mDivider.getIntrinsicHeight(),
parentRight,
child.getTop());
}
mDivider.draw(canvas);
lastHeight = child.getTop();
}
}
/**
* Determines the size and location of offsets between items in the parent
* RecyclerView.
*
* @param outRect The {@link Rect} of offsets to be added around the child
* view
* @param view The child view to be decorated with an offset
* @param parent The RecyclerView onto which dividers are being added
* @param state The current RecyclerView.State of the RecyclerView
*/
@Override
public void getItemOffsets(Rect outRect, View view, RecyclerView parent, RecyclerView.State state)
{
super.getItemOffsets(outRect, view, parent, state);
outRect.left = mDivider.getIntrinsicWidth();
outRect.top = mDivider.getIntrinsicHeight();
}
@NonNull
protected Drawable getDivider()
{
return mDivider;
}
}
|
