Android自动换行的标签实现之自定义ViewGroup（二）_android 自定义换行标签-优快云博客

本文链接：https://blog.youkuaiyun.com/wangbhan/article/details/111477991

本文介绍在Android中如何实现标签自动换行的第二种方法，通过自定义ViewGroup并设置适配器来达成目标。在布局文件中引用自定义组件，并在Java代码中查找控件并配置适配器，适配器内容包括设置标签数据。

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Android中实现标签自动换行方法二

public class FlowViewGroup extends ViewGroup {
   
    private int mPaddingTop;
    private int mPaddingLeft;
    private int mPaddingRight;
    private int mPaddingBottom;
    private ArrayList<String> mList = new ArrayList<>();
    private Context mContext;

    public FlowViewGroup(Context context) {
   
        super(context);
        mContext = context;
    }


    public FlowViewGroup(Context context, AttributeSet attrs) {
   
        super(context, attrs);
        mContext = context;
    }

    public FlowViewGroup(Context context, AttributeSet attrs, int defStyleAttr) {
   
        super(context, attrs, defStyleAttr);
        mContext = context;
    }


    @Override
    protected void onLayout(boolean changed, int l, int t, int r, int b) {
   
        int top = 0;
        int left;
        int lineHeight = 0;
        for (int i = 0; i < lines.size(); i++) {
   
            left = 0;
            top += lineHeight;
            lineHeight = 0;
            ArrayList<View> views = lines.get(i);
            for (View view : views) {
   
                if (view.getVisibility() == GONE) {
   
                    continue;
                }
                MarginLayoutParams layoutParams = (MarginLayoutParams) view.getLayoutParams();
                view.layout(left + layoutParams.leftMargin + mPaddingLeft, top + layoutParams.topMargin + mPaddingTop, left + view.getMeasuredWidth() + layoutParams.leftMargin + mPaddingLeft, top + view.getMeasuredHeight() + layoutParams.topMargin + mPaddingTop);
                lineHeight = Math.max(lineHeight, view.getMeasuredHeight() + layoutParams.topMargin + layoutParams.bottomMargin);
                left