废话不多说，直接上代码：
/**
* 自动换行布局
* Created by 马占柱 on 2018/4/20.
*/
public class WrapLayout extends ViewGroup {
private static final String TAG = "WrapLayout";
/**
* TextView的style
*/
public int TEXTVIEW_STYLE = 0;
/**
* Button的style
*/
public int BUTTON_STYLE = 1;
private int style;
private View btn;
private MarkClickListener markClickListener;
/**
* 存储所有的View，按行记录
*/
private List<List<View>> mAllViews = new ArrayList<>();
/**
* 记录每一行的最大高度
*/
private List<Integer> mLineHeight = new ArrayList<>();
public WrapLayout(Context context) {
super(context);
}
public WrapLayout(Context context, AttributeSet attrs) {
super(context, attrs);
}
public WrapLayout(Context context, AttributeSet attrs, int defStyle) {
super(context, attrs, defStyle);
}
public void setData(List<String> data, Context context, int textSize) {
String[] mydata = null;
if (data != null) {
int length = data.size();
mydata = new String[length];
for (int i = 0; i < length; i++) {
mydata[i] = data.get(i);
}
}
createChild(mydata, context, textSize, 8, 5, 5,
8, 5, 5, 5, 5);
}
private void createChild(String[] data, final Context context, int textSize, int pl, int pt, int pr, int pb, int ml, int mt, int mr, int mb) {
int size = data.length;
for (int i = 0; i < size; i++) {
String text = data[i];
//通过判断style是TextView还是Button进行不同的操作，还可以继续添加不同的view
if (style == TEXTVIEW_STYLE) {
btn = LayoutInflater.from(context).inflate(R.layout.textview, null);
((TextView) btn).setGravity(Gravity.CENTER);
((TextView) btn).setText(text);
((TextView) btn).setTextSize(textSize);
} else if (style == BUTTON_STYLE) {
btn = new Button(context);
((Button) btn).setGravity(Gravity.CENTER);
((Button) btn).setText(text);
((Button) btn).setTextSize(textSize);
}
btn.setClickable(true);
btn.setPadding(dip2px(context, pl), dip2px(context, pt), dip2px(context, pr), dip2px(context, pb));
MarginLayoutParams params = new MarginLayoutParams(MarginLayoutParams.WRAP_CONTENT, MarginLayoutParams.WRAP_CONTENT);
params.setMargins(ml, mt, mr, mb);
btn.setLayoutParams(params);
final int finalI = i;
//给每个view添加点击事件
btn.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
markClickListener.clickMark(finalI);
}
});
this.addView(btn);
}
}
/**
* 根据手机的分辨率从 dp 的单位 转成为 px(像素)
*/
private int dip2px(Context context, float dpValue) {
final float scale = context.getResources().getDisplayMetrics().density;
return (int) (dpValue * scale + 0.5f);
}
public void setData(String[] data, Context context, int textSize,
int paddingLeft, int paddingTop, int paddingRight, int paddingBottom,
int marginLeft, int marginTop, int marginRight, int marginButton) {
createChild(data, context, textSize,
paddingLeft, paddingTop, paddingRight, paddingBottom,
marginLeft, marginTop, marginRight, marginButton);
}
public void setData(String[] data, Context context, int textSize) {
createChild(data, context, textSize, 8, 5, 5,
8, 5, 5, 5, 5);
}
public void setData(List<String> data, Context context, int textSize,
int paddingLeft, int paddingTop, int paddingRight, int paddingBottom,
int marginLeft, int marginTop, int marginRight, int marginButton) {
String[] mydata = null;
if (data != null) {
int length = data.size();
mydata = new String[length];
for (int i = 0; i < length; i++) {
mydata[i] = data.get(i);
}
}
createChild(mydata, context, textSize,
paddingLeft, paddingTop, paddingRight, paddingBottom,
marginLeft, marginTop, marginRight, marginButton);
}
public void setMarkClickListener(MarkClickListener markClickListener) {
this.markClickListener = markClickListener;
}
@Override
protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
super.onMeasure(widthMeasureSpec, heightMeasureSpec);
int widthMode = MeasureSpec.getMode(widthMeasureSpec);
int heightMode = MeasureSpec.getMode(heightMeasureSpec);
int widthSize = MeasureSpec.getSize(widthMeasureSpec);
int heightSize = MeasureSpec.getSize(heightMeasureSpec);
int childCount = getChildCount();
int lineWidth = 0;
int lineHeight = 0;
int width = 0;//warpcontet是需要记录的宽度
int height = 0;
for (int i = 0; i < childCount; i++) {
View child = getChildAt(i);
// 测量每一个child的宽和高
measureChild(child, widthMeasureSpec, heightMeasureSpec);
MarginLayoutParams lp = (MarginLayoutParams) child.getLayoutParams();
int childWidth = child.getMeasuredWidth() + lp.leftMargin + lp.rightMargin;
int childHeight = child.getMeasuredHeight() + lp.topMargin + lp.bottomMargin;
Log.e(TAG, "onMeasure: lineHeight = " + lineHeight + " childHeight = " + childHeight);
if (lineWidth + childWidth > widthSize) {
width = Math.max(lineWidth, childWidth);//这种情况就是排除单个标签很长的情况
lineWidth = childWidth;//开启新行
height += lineHeight;//记录总行高
lineHeight = childHeight;//因为开了新行，所以这行的高度要记录一下
} else {
lineWidth += childWidth;
// lineHeight = Math.max(lineHeight, childHeight); //记录行高
lineHeight = Math.max(height, childHeight); //记录行高
}
// 如果是最后一个，则将当前记录的最大宽度和当前lineWidth做比较
if (i == childCount - 1) {
width = Math.max(width, lineWidth); //宽度
height += lineHeight; //
}
}
setMeasuredDimension((widthMode == MeasureSpec.EXACTLY) ? widthSize
: width, (heightMode == MeasureSpec.EXACTLY) ? heightSize
: height);
}
//onLayout中完成对所有childView的位置以及大小的指定
@Override
protected void onLayout(boolean changed, int l, int t, int r, int b) {
mAllViews.clear(); //清空子控件列表
mLineHeight.clear(); //清空高度记录列表
int width = getWidth();//得到当前控件的宽度（在onmeasure方法中已经测量出来了）
int childCount = getChildCount();
// 存储每一行所有的childView
List<View> lineViews = new ArrayList<View>();
int lineWidth = 0; //行宽
int lineHeight = 0; //总行高
for (int i = 0; i < childCount; i++) {
View child = getChildAt(i);
MarginLayoutParams lp = (MarginLayoutParams) child.getLayoutParams();//得到属性参数
int childWidth = child.getMeasuredWidth();
int childHeight = child.getMeasuredHeight();
// 如果已经需要换行
if (i == 3) {
i = 3;
}
if (childWidth + lp.leftMargin + lp.rightMargin + lineWidth > width) //大于父布局的宽度
{
// 记录这一行所有的View以及最大高度
mLineHeight.add(lineHeight);
// 将当前行的childView保存，然后开启新的ArrayList保存下一行的childView
mAllViews.add(lineViews);
lineWidth = 0;// 重置行宽
lineViews = new ArrayList<View>();
}
/**
* 如果不需要换行，则累加
*/
lineWidth += childWidth + lp.leftMargin + lp.rightMargin;
lineHeight = Math.max(lineHeight, childHeight + lp.topMargin
+ lp.bottomMargin);
lineViews.add(child);
}
// 记录最后一行 (因为最后一行肯定大于父布局的宽度，所以添加最后一行是必要的)
mLineHeight.add(lineHeight);
mAllViews.add(lineViews);
int left = 0;
int top = 0;
int lineNums = mAllViews.size();
for (int i = 0; i < lineNums; i++) {
// 每一行的所有的views
lineViews = mAllViews.get(i);
// 当前行的最大高度 每一行的高度都相同 所以使用（i+1）进行设置高度
lineHeight = (i + 1) * mLineHeight.get(i);
for (int j = 0; j < lineViews.size(); j++) {
View lineChild = lineViews.get(j);
if (lineChild.getVisibility() == View.GONE) {
continue;
}
MarginLayoutParams lp = (MarginLayoutParams) lineChild.getLayoutParams();
//开始画标签了。左边和上边的距离是要根据累计的数确定的。
int lc = left + lp.leftMargin;
int tc = top + lp.topMargin;
int rc = lc + lineChild.getMeasuredWidth();
int bc = tc + lineChild.getMeasuredHeight();
lineChild.layout(lc, tc, rc, bc);
left += lineChild.getMeasuredWidth() + lp.rightMargin + lp.leftMargin;
}
left = 0;//将left归零
top = lineHeight;
}
}
@Override
public LayoutParams generateLayoutParams(AttributeSet attrs) {
return new MarginLayoutParams(getContext(), attrs);
}
public void setStyle(int style) {
this.style = style;
}
public interface MarkClickListener {
void clickMark(int position);
}
}
这是textview的布局：
<?xml version="1.0" encoding="utf-8"?>
<TextView xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="@drawable/tv_bg"
android:ellipsize="end"
android:gravity="center"
android:maxLines="1"
android:textColor="@android:color/white" />
这是textview的背景颜色：
<?xml version="1.0" encoding="utf-8"?>
<shape xmlns:android="http://schemas.android.com/apk/res/android">
<corners android:radius="10dp" />
<solid android:color="#227652" />
</shape>
在布局里面这么用：
<com.love5653520.mazhanzhu.utils.WrapLayout
android:id="@+id/wrap"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_below="@id/text_remen"
android:background="@color/white"
android:layout_marginBottom="5dp"
android:layout_marginLeft="10dp"
android:layout_marginRight="10dp"
android:layout_marginTop="5dp">
</com.love5653520.mazhanzhu.utils.WrapLayout>行了，说多了，都是废话，这些拷过去运行就可以直接看到效果，还有其他的要求可以根据这个慢慢改，基本上能满足%80以上的效果！