数据排列RecyclerView可以解决大部分问题，有一种情况：比如：商城的搜索历史记录，因为输入字符的长短不同，RecyclerView处理列数的时候，比较麻烦，如图：
解决方案：自定义View：
/**
* Created by Administrator on 2018/6/20.
* 自动换行
*/
public class WarpLinearLayout extends ViewGroup {
private Type mType;
private List<WarpLine> mWarpLineGroup;
public WarpLinearLayout(Context context) {
this(context, null);
}
public WarpLinearLayout(Context context, AttributeSet attrs) {
this(context, attrs, R.style.WarpLinearLayoutDefault);
}
public WarpLinearLayout(Context context, AttributeSet attrs, int defStyleAttr) {
super(context, attrs, defStyleAttr);
mType = new Type(context, attrs);
}
@Override
protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
int withMode = MeasureSpec.getMode(widthMeasureSpec);
int withSize = MeasureSpec.getSize(widthMeasureSpec);
int heightMode = MeasureSpec.getMode(heightMeasureSpec);
int heightSize = MeasureSpec.getSize(heightMeasureSpec);
int with = 0;
int height = 0;
int childCount = getChildCount();
/**
* 在调用childView。getMeasre之前必须先调用该行代码，用于对子View大小的测量
*/
measureChildren(widthMeasureSpec, heightMeasureSpec);
/**
* 计算宽度
*/
switch (withMode) {
case MeasureSpec.EXACTLY:
with = withSize;
break;
case MeasureSpec.AT_MOST:
for (int i = 0; i < childCount; i++) {
if (i != 0) {
with += mType.horizontal_Space;
}
with += getChildAt(i).getMeasuredWidth();
}
with += getPaddingLeft() + getPaddingRight();
with = with > withSize ? withSize : with;
break;
case MeasureSpec.UNSPECIFIED:
for (int i = 0; i < childCount; i++) {
if (i != 0) {
with += mType.horizontal_Space;
}
with += getChildAt(i).getMeasuredWidth();
}
with += getPaddingLeft() + getPaddingRight();
break;
default:
with = withSize;
break;
}
/**
* 根据计算出的宽度，计算出所需要的行数
*/
WarpLine warpLine = new WarpLine();
/**
* 不能够在定义属性时初始化，因为onMeasure方法会多次调用
*/
mWarpLineGroup = new ArrayList<WarpLine>();
for (int i = 0; i < childCount; i++) {
if (warpLine.lineWidth + getChildAt(i).getMeasuredWidth() + mType.horizontal_Space > with) {
if (warpLine.lineView.size() == 0) {
warpLine.addView(getChildAt(i));
mWarpLineGroup.add(warpLine);
warpLine = new WarpLine();
} else {
mWarpLineGroup.add(warpLine);
warpLine = new WarpLine();
warpLine.addView(getChildAt(i));
}
} else {
warpLine.addView(getChildAt(i));
}
}
/**
* 添加最后一行
*/
if (warpLine.lineView.size() > 0 && !mWarpLineGroup.contains(warpLine)) {
mWarpLineGroup.add(warpLine);
}
/**
* 计算宽度
*/
height = getPaddingTop() + getPaddingBottom();
for (int i = 0; i < mWarpLineGroup.size(); i++) {
if (i != 0) {
height += mType.vertical_Space;
}
height += mWarpLineGroup.get(i).height;
}
switch (heightMode) {
case MeasureSpec.EXACTLY:
height = heightSize;
break;
case MeasureSpec.AT_MOST:
height = height > heightSize ? heightSize : height;
break;
case MeasureSpec.UNSPECIFIED:
break;
default:
break;
}
setMeasuredDimension(with, height);
}
@Override
protected void onLayout(boolean changed, int l, int t, int r, int b) {
t = getPaddingTop();
for (int i = 0; i < mWarpLineGroup.size(); i++) {
int left = getPaddingLeft();
WarpLine warpLine = mWarpLineGroup.get(i);
int lastWidth = getMeasuredWidth() - warpLine.lineWidth;
for (int j = 0; j < warpLine.lineView.size(); j++) {
View view = warpLine.lineView.get(j);
if (isFull()) {//需要充满当前行时
view.layout(left, t, left + view.getMeasuredWidth() + lastWidth / warpLine.lineView.size(), t + view.getMeasuredHeight());
left += view.getMeasuredWidth() + mType.horizontal_Space + lastWidth / warpLine.lineView.size();
} else {
switch (getGrivate()) {
case 0://右对齐
view.layout(left + lastWidth, t, left + lastWidth + view.getMeasuredWidth(), t + view.getMeasuredHeight());
break;
case 2://居中对齐
view.layout(left + lastWidth / 2, t, left + lastWidth / 2 + view.getMeasuredWidth(), t + view.getMeasuredHeight());
break;
default://左对齐
view.layout(left, t, left + view.getMeasuredWidth(), t + view.getMeasuredHeight());
break;
}
left += view.getMeasuredWidth() + mType.horizontal_Space;
}
}
t += warpLine.height + mType.vertical_Space;
}
}
/**
* 用于存放一行子View
*/
private final class WarpLine {
private List<View> lineView = new ArrayList<View>();
/**
* 当前行中所需要占用的宽度
*/
private int lineWidth = getPaddingLeft() + getPaddingRight();
/**
* 该行View中所需要占用的最大高度
*/
private int height = 0;
private void addView(View view) {
if (lineView.size() != 0) {
lineWidth += mType.horizontal_Space;
}
height = height > view.getMeasuredHeight() ? height : view.getMeasuredHeight();
lineWidth += view.getMeasuredWidth();
lineView.add(view);
}
}
/**
* 对样式的初始化
*/
private final static class Type {
/*
*对齐方式 right 0，left 1，center 2
*/
private int grivate;
/**
* 水平间距,单位px
*/
private float horizontal_Space;
/**
* 垂直间距,单位px
*/
private float vertical_Space;
/**
* 是否自动填满
*/
private boolean isFull;
Type(Context context, AttributeSet attrs) {
if (attrs == null) {
return;
}
TypedArray typedArray = context.obtainStyledAttributes(attrs, R.styleable.WarpLinearLayout);
grivate = typedArray.getInt(R.styleable.WarpLinearLayout_grivate, grivate);
horizontal_Space = typedArray.getDimension(R.styleable.WarpLinearLayout_horizontal_Space, horizontal_Space);
vertical_Space = typedArray.getDimension(R.styleable.WarpLinearLayout_vertical_Space, vertical_Space);
isFull = typedArray.getBoolean(R.styleable.WarpLinearLayout_isFull, isFull);
}
}
public int getGrivate() {
return mType.grivate;
}
public float getHorizontal_Space() {
return mType.horizontal_Space;
}
public float getVertical_Space() {
return mType.vertical_Space;
}
public boolean isFull() {
return mType.isFull;
}
public void setGrivate(int grivate) {
mType.grivate = grivate;
}
public void setHorizontal_Space(float horizontal_Space) {
mType.horizontal_Space = horizontal_Space;
}
public void setVertical_Space(float vertical_Space) {
mType.vertical_Space = vertical_Space;
}
public void setIsFull(boolean isFull) {
mType.isFull = isFull;
}
/**
* 每行子View的对齐方式
*/
public final static class Gravite {
public final static int RIGHT = 0;
public final static int LEFT = 1;
public final static int CENTER = 2;
}
}简单的布局就不写了，结合动态布局实现动态添加：
/**
* 动态布局
* @param context 上下文
* @param list 内容集合
* @param lay_gallery 自动换行的view
*/
public void ScrollViewLayout(final Context context, final List<String> list, WarpLinearLayout lay_gallery) {//List<LinkedTreeMap<String, Object>> list
lay_gallery.removeAllViews();
LayoutInflater mInflater = LayoutInflater.from(context);
if (list != null && list.size() != 0) {
for (int i = 0; i < list.size(); i++) {
final View view = mInflater.inflate(R.layout.view_item_grid_search_tag, lay_gallery, false);//添加的view,这里很简单就是一个TextView
final TextView tv_search_tag_name = (TextView) view.findViewById(R.id.tv_search_tag_name);
tv_search_tag_name.setText(list.get(i));
final int finalI = i;
tv_search_tag_name.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
//处理点击事件
}
});
lay_gallery.addView(view);
}
}
}方法调用：
ScrollViewLayout(SearchActivity.this,localTag_ret, searchLast);