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添加设置最大列数的功能
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teach committed Apr 29, 2021
1 parent 01431cc commit 4ee12c8
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Showing 2 changed files with 48 additions and 7 deletions.
54 changes: 47 additions & 7 deletions labels/src/main/java/com/donkingliang/labels/LabelsView.java
View file
Original file line number Diff line number Diff line change
Expand Up @@ -38,6 +38,7 @@ public class LabelsView extends ViewGroup implements View.OnClickListener, View.
private int mMaxSelect;
private int mMinSelect;
private int mMaxLines;
private int mMaxColumns;
private boolean isSingleLine = false;
private boolean isTextBold = false;

Expand All @@ -56,7 +57,7 @@ public class LabelsView extends ViewGroup implements View.OnClickListener, View.
private ArrayList<Integer> mCompulsorys = new ArrayList<>();

//当前的label行数，需要在layout完成之后才知道的，调用的时候需要在对应方法之后在调用post()来获取
private int lines;
private int mLines;

private OnLabelClickListener mLabelClickListener;
private OnLabelLongClickListener mLabelLongClickListener;
Expand Down Expand Up @@ -126,6 +127,7 @@ private void getAttrs(Context context, AttributeSet attrs) {
mMaxSelect = mTypedArray.getInteger(R.styleable.LabelsView_maxSelect, 0);
mMinSelect = mTypedArray.getInteger(R.styleable.LabelsView_minSelect, 0);
mMaxLines = mTypedArray.getInteger(R.styleable.LabelsView_maxLines, 0);
mMaxColumns = mTypedArray.getInteger(R.styleable.LabelsView_maxColumns, 0);
isIndicator = mTypedArray.getBoolean(R.styleable.LabelsView_isIndicator, false);

mLabelGravity = mTypedArray.getInt(R.styleable.LabelsView_labelGravity, mLabelGravity);
Expand Down Expand Up @@ -213,8 +215,11 @@ private void measureSingleLine(int widthMeasureSpec, int heightMeasureSpec) {
int count = getChildCount();
int contentWidth = 0; //记录内容的宽度
int maxItemHeight = 0; //记录一行中item高度最大的高度

for (int i = 0; i < count; i++) {
if ((mMaxColumns > 0 && i == mMaxColumns)) {
break;
}

View view = getChildAt(i);
measureChild(view, widthMeasureSpec, heightMeasureSpec);
contentWidth += view.getMeasuredWidth();
Expand All @@ -227,7 +232,7 @@ private void measureSingleLine(int widthMeasureSpec, int heightMeasureSpec) {
measureSize(heightMeasureSpec, maxItemHeight + getPaddingTop() + getPaddingBottom()));

// 如果count等于0，没有标签，则lines为0
lines = count > 0 ? 1 : 0;
mLines = count > 0 ? 1 : 0;
}

/**
Expand All @@ -245,12 +250,14 @@ private void measureMultiLine(int widthMeasureSpec, int heightMeasureSpec) {
int maxLineWidth = 0; //记录最宽的行宽
int maxItemHeight = 0; //记录一行中item高度最大的高度
int lineCount = 1;
int columnsCount = 0;

for (int i = 0; i < count; i++) {
View view = getChildAt(i);
measureChild(view, widthMeasureSpec, heightMeasureSpec);

if (lineWidth + view.getMeasuredWidth() > maxWidth) {
if ((lineWidth + view.getMeasuredWidth() > maxWidth)
|| (mMaxColumns > 0 && columnsCount == mMaxColumns)) {
lineCount++;
if (mMaxLines > 0 && lineCount > mMaxLines) {
lineCount--;
Expand All @@ -261,9 +268,11 @@ private void measureMultiLine(int widthMeasureSpec, int heightMeasureSpec) {
maxItemHeight = 0;
maxLineWidth = Math.max(maxLineWidth, lineWidth);
lineWidth = 0;
columnsCount = 0;
}

lineWidth += view.getMeasuredWidth();
columnsCount++;
maxItemHeight = Math.max(maxItemHeight, view.getMeasuredHeight());

if (i != count - 1) {
Expand All @@ -279,6 +288,7 @@ private void measureMultiLine(int widthMeasureSpec, int heightMeasureSpec) {
maxItemHeight = 0;
maxLineWidth = Math.max(maxLineWidth, lineWidth);
lineWidth = 0;
columnsCount = 0;
} else {
lineWidth += mWordMargin;
}
Expand All @@ -291,7 +301,7 @@ private void measureMultiLine(int widthMeasureSpec, int heightMeasureSpec) {
measureSize(heightMeasureSpec, contentHeight + getPaddingTop() + getPaddingBottom()));

// 如果count等于0，没有标签，则lines为0
lines = count > 0 ? lineCount : 0;
mLines = count > 0 ? lineCount : 0;
}

private int measureSize(int measureSpec, int size) {
Expand Down Expand Up @@ -320,12 +330,14 @@ protected void onLayout(boolean changed, int left, int top, int right, int botto
int contentWidth = right - left;
int maxItemHeight = 0;
int lineCount = 1;
int columnsCount = 0;

int count = getChildCount();
for (int i = 0; i < count; i++) {
View view = getChildAt(i);

if (!isSingleLine && contentWidth < x + view.getMeasuredWidth() + getPaddingRight()) {
if (!isSingleLine && (contentWidth < x + view.getMeasuredWidth() + getPaddingRight()
|| (mMaxColumns > 0 && columnsCount == mMaxColumns))) {
lineCount++;
if (mMaxLines > 0 && lineCount > mMaxLines) {
break;
Expand All @@ -334,11 +346,18 @@ protected void onLayout(boolean changed, int left, int top, int right, int botto
y += mLineMargin;
y += maxItemHeight;
maxItemHeight = 0;
columnsCount = 0;
}

if (isSingleLine && (mMaxColumns > 0 && columnsCount == mMaxColumns)){
break;
}

view.layout(x, y, x + view.getMeasuredWidth(), y + view.getMeasuredHeight());
x += view.getMeasuredWidth();
x += mWordMargin;
maxItemHeight = Math.max(maxItemHeight, view.getMeasuredHeight());
columnsCount++;
}
}

Expand All @@ -354,6 +373,7 @@ protected void onLayout(boolean changed, int left, int top, int right, int botto
private static final String KEY_MAX_SELECT_STATE = "key_max_select_state";
private static final String KEY_MIN_SELECT_STATE = "key_min_select_state";
private static final String KEY_MAX_LINES_STATE = "key_max_lines_state";
private static final String KEY_MAX_COLUMNS_STATE = "key_max_columns_state";
private static final String KEY_INDICATOR_STATE = "key_indicator_state";
// 由于新版(1.4.0)的标签列表允许设置任何类型的数据，而不仅仅是String。并且标签显示的内容
// 最终由LabelTextProvider提供，所以LabelsView不再在onSaveInstanceState()和onRestoreInstanceState()
Expand Down Expand Up @@ -401,6 +421,8 @@ protected Parcelable onSaveInstanceState() {
bundle.putInt(KEY_MIN_SELECT_STATE, mMinSelect);
//保存标签的最大行数
bundle.putInt(KEY_MAX_LINES_STATE, mMaxLines);
//保存标签的最大列数
bundle.putInt(KEY_MAX_COLUMNS_STATE, mMaxColumns);
//保存是否是指示器模式
bundle.putBoolean(KEY_INDICATOR_STATE, isIndicator);

Expand Down Expand Up @@ -465,6 +487,8 @@ protected void onRestoreInstanceState(Parcelable state) {
setMinSelect(bundle.getInt(KEY_MIN_SELECT_STATE, mMinSelect));
//恢复标签的最大行数
setMaxLines(bundle.getInt(KEY_MAX_LINES_STATE, mMaxLines));
//恢复标签的最大列数
setMaxLines(bundle.getInt(KEY_MAX_COLUMNS_STATE, mMaxColumns));
//恢复是否是指示器模式
setIndicator(bundle.getBoolean(KEY_INDICATOR_STATE, isIndicator));

Expand Down Expand Up @@ -1072,6 +1096,22 @@ public int getMaxLines() {
return mMaxLines;
}

/**
* 设置最大列数，小于等于0则不限行数。
*
* @param maxColumns
*/
public void setMaxColumns(int maxColumns) {
if (mMaxColumns != maxColumns) {
mMaxColumns = maxColumns;
requestLayout();
}
}

public int getMaxColumns() {
return mMaxColumns;
}

/**
* 设置为指示器模式，只能看，不能手动操作。这种模式下，用户不能通过手动点击改变标签的选中状态。
* 但是仍然可以通过调用setSelects()、clearAllSelect()等方法改变标签的选中状态。
Expand Down Expand Up @@ -1109,7 +1149,7 @@ public boolean isSingleLine() {
* @return
*/
public int getLines() {
return this.lines;
return this.mLines;
}

/**
Expand Down
1 change: 1 addition & 0 deletions labels/src/main/res/values/attrs.xml
View file
Original file line number Diff line number Diff line change
Expand Up @@ -48,6 +48,7 @@
<attr name="maxSelect" format="integer" />
<attr name="minSelect" format="integer" />
<attr name="maxLines" format="integer" />
<attr name="maxColumns" format="integer" />
<attr name="isIndicator" format="boolean" />
<attr name="labelTextColor" format="reference|color" />
<attr name="labelTextSize" format="dimension" />
Expand Down

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