标签

 

import android.content.Context;
import android.util.AttributeSet;
import android.view.View;
import android.view.ViewGroup;

/**
 * 标签布局
 */
public class FlowLayout extends ViewGroup {
    private int mViewTotalWidth;

    public FlowLayout(Context context) {
        this(context, null);
    }

    public FlowLayout(Context context, AttributeSet attrs) {
        this(context, attrs, 0);
    }

    public FlowLayout(Context context, AttributeSet attrs, int defStyleAttr) {
        super(context, attrs, defStyleAttr);
    }

    @Override
    protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
        mViewTotalWidth = getMeasureSize(widthMeasureSpec, true);
        int height = getMeasureSize(heightMeasureSpec, false);

        // 测量子View
        for (int i = 0; i < getChildCount(); i++) {
            measureChild(getChildAt(i), widthMeasureSpec, heightMeasureSpec);
        }

        setMeasuredDimension(mViewTotalWidth, height);
    }

    private int getMeasureSize(int measureSpec, boolean isWidth) {
        int specMode = MeasureSpec.getMode(measureSpec);

        int size = 0;
        switch (specMode) {
            case MeasureSpec.EXACTLY:
                // 父容器指定size
                size = MeasureSpec.getSize(measureSpec);
                break;
            case MeasureSpec.AT_MOST:
                // 父容器未指定size

                // 获取父容器最大size
                int parentMaxSize = MeasureSpec.getSize(measureSpec);

                // 获取item view的总size
                if (isWidth) {
                    int totalChildWidth = 0;
                    for (int i = 0; i < getChildCount(); i++) {
                        View curChildView = getChildAt(i);
                        MarginLayoutParams mlp = (MarginLayoutParams) curChildView.getLayoutParams();
                        totalChildWidth += curChildView.getMeasuredWidth() + mlp.leftMargin + mlp.rightMargin;
                    }

                    size = totalChildWidth > parentMaxSize ? parentMaxSize : totalChildWidth;
                } else {
                    int totalChildHeight = 0;
                    int tempWidth = 0;
                    int tempLineHeight = 0;
                    for (int i = 0; i < getChildCount(); i++) {
                        View curChildView = getChildAt(i);
                        MarginLayoutParams mlp = (MarginLayoutParams) curChildView.getLayoutParams();
                        int curChildViewWidth = curChildView.getMeasuredWidth() + mlp.leftMargin + mlp.rightMargin;
                        int curChildViewHeight = curChildView.getMeasuredHeight() + mlp.topMargin + mlp.bottomMargin;

                        tempLineHeight = Math.max(tempLineHeight, curChildViewHeight);

                        if (i == 0) {
                            totalChildHeight = tempLineHeight;
                        } else {
                            if (tempWidth + curChildViewWidth > mViewTotalWidth) {
                                // 超出一行
                                totalChildHeight += tempLineHeight;
                                tempWidth = 0;
                            }
                        }

                        tempWidth += curChildViewWidth;
                    }

                    size = totalChildHeight > parentMaxSize ? parentMaxSize : totalChildHeight;
                }
                break;
            case MeasureSpec.UNSPECIFIED:
                if (isWidth) {
                    size = 300;
                } else {
                    size = 200;
                }
                break;
        }
        return size;
    }

    @Override
    protected void onLayout(boolean changed, int l, int t, int r, int b) {
        int viewWidth = getWidth();

        int tempLeft = 0;
        int tempTop = 0;
        int curLineMaxHeight = 0;
        for (int i = 0; i < getChildCount(); i++) {
            View curChildView = getChildAt(i);
            MarginLayoutParams mlp = (MarginLayoutParams) curChildView.getLayoutParams();
            int curChildViewWidth = curChildView.getMeasuredWidth();
            int curChildViewHeight = curChildView.getMeasuredHeight();

            if (tempLeft + curChildViewWidth + mlp.leftMargin + mlp.rightMargin > viewWidth) {
                // 超出一行
                tempLeft = 0;
                tempTop += curLineMaxHeight;
            }

            int curLeft = tempLeft + mlp.leftMargin;
            int curTop = tempTop + mlp.topMargin;
            curChildView.layout(curLeft, curTop, curLeft + curChildViewWidth, curTop + curChildViewHeight);
            tempLeft += curChildViewWidth + mlp.leftMargin + mlp.rightMargin;
            curLineMaxHeight = Math.max(curLineMaxHeight, curChildViewHeight + mlp.topMargin + mlp.bottomMargin);
        }
    }

    @Override
    public LayoutParams generateLayoutParams(AttributeSet attrs) {
        return new MarginLayoutParams(getContext(), attrs);
    }

}

　　只是展示

    private void refLabelView(ArrayList<String> labels) {
        mLabels = labels;
        mCvTagContainer.removeAllViews();

        if (mLabels != null && !mLabels.isEmpty()) {
            for (String tag : mLabels) {
                TextView tvTag = (TextView) LayoutInflater.from(this).inflate(R.layout.item_sign_user, mCvTagContainer, false);
                tvTag.setText(tag);
                mCvTagContainer.addView(tvTag);
            }
        }
    }

　　

也可封装包含点击

可参考：  http://blog.csdn.net/jdsjlzx/article/details/38129569