本篇文章主要讲解的是有关RecyclerView下划线的使用,主要有几个方法,具体如下:
第一种方式:网格分割线
public class GridDivider extends RecyclerView.ItemDecoration {
private Drawable mDividerDarwable;
private int mDividerHight = 1;
private Paint mColorPaint;
public final int[] ATRRS = new int[]{android.R.attr.listDivider};
public GridDivider(Context context) {
final TypedArray ta = context.obtainStyledAttributes(ATRRS);
this.mDividerDarwable = ta.getDrawable(0);
ta.recycle();
}
/*
int dividerHight 分割线的线宽
int dividerColor 分割线的颜色
*/
public GridDivider(Context context, int dividerHight, int dividerColor) {
this(context);
mDividerHight = dividerHight;
mColorPaint = new Paint();
mColorPaint.setColor(dividerColor);
}
/*
int dividerHight 分割线的线宽
Drawable dividerDrawable 图片分割线
*/
public GridDivider(Context context, int dividerHight, Drawable dividerDrawable) {
this(context);
mDividerHight = dividerHight;
mDividerDarwable = dividerDrawable;
}
@Override
public void onDraw(Canvas c, RecyclerView parent, RecyclerView.State state) {
super.onDraw(c, parent, state);
//画水平和垂直分割线
drawHorizontalDivider(c, parent);
drawVerticalDivider(c, parent);
}
public void drawVerticalDivider(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 top = child.getTop() - params.topMargin;
final int bottom = child.getBottom() + params.bottomMargin;
int left = 0;
int right = 0;
//左边第一列
if ((i % 3) == 0) {
//item左边分割线
left = child.getLeft();
right = left + mDividerHight;
mDividerDarwable.setBounds(left, top, right, bottom);
mDividerDarwable.draw(c);
if (mColorPaint != null) {
c.drawRect(left, top, right, bottom, mColorPaint);
}
//item右边分割线
left = child.getRight() + params.rightMargin - mDividerHight;
right = left + mDividerHight;
} else {
//非左边第一列
left = child.getRight() + params.rightMargin - mDividerHight;
right = left + mDividerHight;
}
//画分割线
mDividerDarwable.setBounds(left, top, right, bottom);
mDividerDarwable.draw(c);
if (mColorPaint != null) {
c.drawRect(left, top, right, bottom, mColorPaint);
}
}
}
public void drawHorizontalDivider(Canvas c, RecyclerView parent) {
final int childCount = parent.getChildCount();
for (int i = 0; i < childCount; i++) {
final View child = parent.getChildAt(i);
RecyclerView.LayoutParams params = (RecyclerView.LayoutParams) child.getLayoutParams();
final int left = child.getLeft() - params.leftMargin - mDividerHight;
final int right = child.getRight() + params.rightMargin;
int top = 0;
int bottom = 0;
// 最上面一行
if ((i / 3) == 0) {
//当前item最上面的分割线
top = child.getTop();
//当前item下面的分割线
bottom = top + mDividerHight;
mDividerDarwable.setBounds(left, top, right, bottom);
mDividerDarwable.draw(c);
if (mColorPaint != null) {
c.drawRect(left, top, right, bottom, mColorPaint);
}
top = child.getBottom() + params.bottomMargin;
bottom = top + mDividerHight;
} else {
top = child.getBottom() + params.bottomMargin;
bottom = top + mDividerHight;
}
//画分割线
mDividerDarwable.setBounds(left, top, right, bottom);
mDividerDarwable.draw(c);
if (mColorPaint != null) {
c.drawRect(left, top, right, bottom, mColorPaint);
}
}
}
}
第二种方式,水平下划线
第一种:
public class GridDivider extends RecyclerView.ItemDecoration {
private Drawable mDividerDarwable;
private int mDividerHight = 1;
private Paint mColorPaint;
public final int[] ATRRS = new int[]{android.R.attr.listDivider};
public GridDivider(Context context) {
final TypedArray ta = context.obtainStyledAttributes(ATRRS);
this.mDividerDarwable = ta.getDrawable(0);
ta.recycle();
}
/*
int dividerHight 分割线的线宽
int dividerColor 分割线的颜色
*/
public GridDivider(Context context, int dividerHight, int dividerColor) {
this(context);
mDividerHight = dividerHight;
mColorPaint = new Paint();
mColorPaint.setColor(dividerColor);
}
/*
int dividerHight 分割线的线宽
Drawable dividerDrawable 图片分割线
*/
public GridDivider(Context context, int dividerHight, Drawable dividerDrawable) {
this(context);
mDividerHight = dividerHight;
mDividerDarwable = dividerDrawable;
}
@Override
public void onDraw(Canvas c, RecyclerView parent, RecyclerView.State state) {
super.onDraw(c, parent, state);
//画水平和垂直分割线
drawHorizontalDivider(c, parent);
drawVerticalDivider(c, parent);
}
public void drawVerticalDivider(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 top = child.getTop() - params.topMargin;
final int bottom = child.getBottom() + params.bottomMargin;
int left = 0;
int right = 0;
//左边第一列
if ((i % 3) == 0) {
//item左边分割线
left = child.getLeft();
right = left + mDividerHight;
mDividerDarwable.setBounds(left, top, right, bottom);
mDividerDarwable.draw(c);
if (mColorPaint != null) {
c.drawRect(left, top, right, bottom, mColorPaint);
}
//item右边分割线
left = child.getRight() + params.rightMargin - mDividerHight;
right = left + mDividerHight;
} else {
//非左边第一列
left = child.getRight() + params.rightMargin - mDividerHight;
right = left + mDividerHight;
}
//画分割线
mDividerDarwable.setBounds(left, top, right, bottom);
mDividerDarwable.draw(c);
if (mColorPaint != null) {
c.drawRect(left, top, right, bottom, mColorPaint);
}
}
}
public void drawHorizontalDivider(Canvas c, RecyclerView parent) {
final int childCount = parent.getChildCount();
for (int i = 0; i < childCount; i++) {
final View child = parent.getChildAt(i);
RecyclerView.LayoutParams params = (RecyclerView.LayoutParams) child.getLayoutParams();
final int left = child.getLeft() - params.leftMargin - mDividerHight;
final int right = child.getRight() + params.rightMargin;
int top = 0;
int bottom = 0;
// 最上面一行
if ((i / 3) == 0) {
//当前item最上面的分割线
top = child.getTop();
//当前item下面的分割线
bottom = top + mDividerHight;
mDividerDarwable.setBounds(left, top, right, bottom);
mDividerDarwable.draw(c);
if (mColorPaint != null) {
c.drawRect(left, top, right, bottom, mColorPaint);
}
top = child.getBottom() + params.bottomMargin;
bottom = top + mDividerHight;
} else {
top = child.getBottom() + params.bottomMargin;
bottom = top + mDividerHight;
}
//画分割线
mDividerDarwable.setBounds(left, top, right, bottom);
mDividerDarwable.draw(c);
if (mColorPaint != null) {
c.drawRect(left, top, right, bottom, mColorPaint);
}
}
}
}
第二种:
public class GridDivider extends RecyclerView.ItemDecoration {
private Drawable mDividerDarwable;
private int mDividerHight = 1;
private Paint mColorPaint;
public final int[] ATRRS = new int[]{android.R.attr.listDivider};
public GridDivider(Context context) {
final TypedArray ta = context.obtainStyledAttributes(ATRRS);
this.mDividerDarwable = ta.getDrawable(0);
ta.recycle();
}
/*
int dividerHight 分割线的线宽
int dividerColor 分割线的颜色
*/
public GridDivider(Context context, int dividerHight, int dividerColor) {
this(context);
mDividerHight = dividerHight;
mColorPaint = new Paint();
mColorPaint.setColor(dividerColor);
}
/*
int dividerHight 分割线的线宽
Drawable dividerDrawable 图片分割线
*/
public GridDivider(Context context, int dividerHight, Drawable dividerDrawable) {
this(context);
mDividerHight = dividerHight;
mDividerDarwable = dividerDrawable;
}
@Override
public void onDraw(Canvas c, RecyclerView parent, RecyclerView.State state) {
super.onDraw(c, parent, state);
//画水平和垂直分割线
drawHorizontalDivider(c, parent);
drawVerticalDivider(c, parent);
}
public void drawVerticalDivider(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 top = child.getTop() - params.topMargin;
final int bottom = child.getBottom() + params.bottomMargin;
int left = 0;
int right = 0;
//左边第一列
if ((i % 3) == 0) {
//item左边分割线
left = child.getLeft();
right = left + mDividerHight;
mDividerDarwable.setBounds(left, top, right, bottom);
mDividerDarwable.draw(c);
if (mColorPaint != null) {
c.drawRect(left, top, right, bottom, mColorPaint);
}
//item右边分割线
left = child.getRight() + params.rightMargin - mDividerHight;
right = left + mDividerHight;
} else {
//非左边第一列
left = child.getRight() + params.rightMargin - mDividerHight;
right = left + mDividerHight;
}
//画分割线
mDividerDarwable.setBounds(left, top, right, bottom);
mDividerDarwable.draw(c);
if (mColorPaint != null) {
c.drawRect(left, top, right, bottom, mColorPaint);
}
}
}
public void drawHorizontalDivider(Canvas c, RecyclerView parent) {
final int childCount = parent.getChildCount();
for (int i = 0; i < childCount; i++) {
final View child = parent.getChildAt(i);
RecyclerView.LayoutParams params = (RecyclerView.LayoutParams) child.getLayoutParams();
final int left = child.getLeft() - params.leftMargin - mDividerHight;
final int right = child.getRight() + params.rightMargin;
int top = 0;
int bottom = 0;
// 最上面一行
if ((i / 3) == 0) {
//当前item最上面的分割线
top = child.getTop();
//当前item下面的分割线
bottom = top + mDividerHight;
mDividerDarwable.setBounds(left, top, right, bottom);
mDividerDarwable.draw(c);
if (mColorPaint != null) {
c.drawRect(left, top, right, bottom, mColorPaint);
}
top = child.getBottom() + params.bottomMargin;
bottom = top + mDividerHight;
} else {
top = child.getBottom() + params.bottomMargin;
bottom = top + mDividerHight;
}
//画分割线
mDividerDarwable.setBounds(left, top, right, bottom);
mDividerDarwable.draw(c);
if (mColorPaint != null) {
c.drawRect(left, top, right, bottom, mColorPaint);
}
}
}
}
以上就是今天主要分享的内容,希望对广大网友有所帮助。