/*** 流式标签(动态的，根据传入的数据动态添加标签)*/
public class CustomerFlowLayout extends ViewGroup {private List<String> mTags = new ArrayList<String>();public CustomerFlowLayout(Context context, AttributeSet attrs, int defStyle) {super(context, attrs, defStyle);}public CustomerFlowLayout(Context context, AttributeSet attrs) {super(context, attrs);}public CustomerFlowLayout(Context context) {super(context);}@Overrideprotected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {int widthMode = MeasureSpec.getMode(widthMeasureSpec);int widthSize = MeasureSpec.getSize(widthMeasureSpec);int heightMode = MeasureSpec.getMode(heightMeasureSpec);int heightSize = MeasureSpec.getSize(heightMeasureSpec);//当前ViewGroup的总高度int totalHeight= 0;//所有行中的最大宽度int maxLineWidth = 0;//当前行的最大高度int lineMaxHeight = 0;//当前行的总宽度int currentLineWidth = 0;//每个childView所占用的宽度int childViewWidthSpace = 0;//每个childView所占用的高度int childViewHeightSpace = 0;int count = getChildCount();MarginLayoutParams layoutParams;for(int i = 0; i < count; i++){View child = getChildAt(i);if(child.getVisibility() != View.GONE){//只有当这个View能够显示的时候才去测量//测量每个子View，以获取子View的宽和高
                measureChild(child, widthMeasureSpec, heightMeasureSpec);layoutParams = (MarginLayoutParams) child.getLayoutParams();childViewWidthSpace = child.getMeasuredWidth() + layoutParams.leftMargin + layoutParams.rightMargin;childViewHeightSpace = child.getMeasuredHeight() + layoutParams.topMargin + layoutParams.bottomMargin;if(currentLineWidth + childViewWidthSpace > widthSize){//表示如果当前行再加上现在这个子View，就会超出总的规定宽度，需要另起一行totalHeight += lineMaxHeight;if(maxLineWidth < currentLineWidth){//如果行的最长宽度发生了变化，更新保存的最长宽度maxLineWidth = currentLineWidth;}currentLineWidth = childViewWidthSpace;//另起一行后，需要重置当前行宽lineMaxHeight = childViewHeightSpace;}else{//表示当前行可以继续添加子元素currentLineWidth += childViewWidthSpace;if(lineMaxHeight < childViewHeightSpace){lineMaxHeight = childViewHeightSpace;}}}}setMeasuredDimension(widthMode == MeasureSpec.EXACTLY ? widthSize : maxLineWidth, heightMode == MeasureSpec.EXACTLY ? heightSize : totalHeight);}@Overrideprotected void onLayout(boolean changed, int l, int t, int r, int b) {//当前是第几行int currentLine = 1;//存放每一行的最大高度List<Integer> lineMaxHeightList = new ArrayList<Integer>();//每个childView所占用的宽度int childViewWidthSpace = 0;//每个childView所占用的高度int childViewHeightSpace = 0;//当前行的最大高度int lineMaxHeight = 0;//当前行的总宽度int currentLineWidth = 0;int count = getChildCount();MarginLayoutParams layoutParams;for(int i = 0; i < count; i++){int cl= 0, ct = 0, cr = 0, cb = 0;View child = getChildAt(i);if(child.getVisibility() != View.GONE){//只有当这个View能够显示的时候才去测量
            layoutParams = (MarginLayoutParams) child.getLayoutParams();childViewWidthSpace = child.getMeasuredWidth() + layoutParams.leftMargin + layoutParams.rightMargin;childViewHeightSpace = child.getMeasuredHeight() + layoutParams.topMargin + layoutParams.bottomMargin;System.out.println("getWidth()---->"+getWidth());if(currentLineWidth + childViewWidthSpace > getWidth()){//表示如果当前行再加上现在这个子View，就会超出总的规定宽度，需要另起一行lineMaxHeightList.add(lineMaxHeight);//此时先将这一行的最大高度加入到集合中//新的一行，重置一些参数currentLine++;currentLineWidth = childViewWidthSpace;lineMaxHeight = childViewHeightSpace;cl = layoutParams.leftMargin;if(currentLine > 1){for(int j = 0; j < currentLine - 1; j++){ct += lineMaxHeightList.get(j);}ct += layoutParams.topMargin ;}else{ct = layoutParams.topMargin;}}else{//表示当前行可以继续添加子元素cl = currentLineWidth + layoutParams.leftMargin;if(currentLine > 1){for(int j = 0; j < currentLine - 1; j++){ct += lineMaxHeightList.get(j);}ct += layoutParams.topMargin;}else{ct = layoutParams.topMargin;}currentLineWidth += childViewWidthSpace;if(lineMaxHeight < childViewHeightSpace){lineMaxHeight = childViewHeightSpace;}}cr = cl + child.getMeasuredWidth();cb = ct + child.getMeasuredHeight();child.layout(cl, ct, cr, cb);}}}@Overridepublic LayoutParams generateLayoutParams(AttributeSet attrs) {return new MarginLayoutParams(getContext(), attrs);}public void setTags(List<String> tags){if(tags!= null){mTags.clear();mTags.addAll(tags);for(int i = 0; i < mTags.size(); i++){TextView tv = new TextView(getContext());MarginLayoutParams lp = new MarginLayoutParams(MarginLayoutParams.WRAP_CONTENT, MarginLayoutParams.WRAP_CONTENT);lp.setMargins(15, 15, 15, 15);
//                lp.width = MarginLayoutParams.WRAP_CONTENT;
//                lp.height = MarginLayoutParams.WRAP_CONTENT;
                tv.setLayoutParams(lp);tv.setBackgroundResource(R.drawable.tv_bg);/** setPadding一定要在setBackgroundResource后面使用才有效！！！* http://stackoverflow.com/questions/18327498/setting-padding-for-textview-not-working*/tv.setPadding(15, 15, 15, 15);tv.setTextColor(Color.WHITE);tv.setText(mTags.get(i));tv.setOnClickListener(new OnClickListener() {@Overridepublic void onClick(View v) {if(listener != null){listener.onClick(v);}}});addView(tv);}requestLayout();}}private OnTagItemClickListener listener;public interface OnTagItemClickListener{public void onClick(View v);}public void setOnTagItemClickListener(OnTagItemClickListener l){listener = l;}}

public class MainActivity extends Activity {private CustomerFlowLayout customerFlowLayout;List<String> tags = new ArrayList<String>();@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.activity_dynamic_tagflowlayout);CustomerFlowLayout = (CustomerFlowLayout) findViewById(R.id.dynamic_tag);customerFlowLayout.setOnTagItemClickListener(new OnTagItemClickListener() {@Overridepublic void onClick(View v) {TextView tv = (TextView) v;Toast.makeText(MainActivity.this, tv.getText().toString(), Toast.LENGTH_SHORT).show();}});initData();customerFlowLayout.setTags(tags);}private void initData() {tags.add("阳哥你好！");tags.add("Android开发");tags.add("新闻热点");tags.add("热水进宿舍啦！");tags.add("I love you");tags.add("成都妹子");tags.add("新余妹子");tags.add("仙女湖");tags.add("创新工厂");tags.add("孵化园");tags.add("神州100发射");tags.add("有毒疫苗");tags.add("顶你阳哥阳哥");tags.add("Hello World");tags.add("闲逛的蚂蚁");tags.add("闲逛的蚂蚁");tags.add("闲逛的蚂蚁");tags.add("闲逛的蚂蚁");tags.add("闲逛的蚂蚁");tags.add("闲逛的蚂蚁");}}