GeneralViewGroup.java

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

/**
 * Created by amyu- on 2015/04/19.
 */
public class GeneralViewGroup extends ViewGroup {

    private int mParentWidth;

    private int mMargin;

    private OnItemClickListener mOnItemClickListener;

    public GeneralViewGroup(Context context) {
        this(context, null, 0);
    }

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

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

    @Override
    protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
        super.onMeasure(widthMeasureSpec, heightMeasureSpec);
        int childCount = getChildCount();

        int height = 0;
        int right = 0;

        int viewWidth = MeasureSpec.getSize(widthMeasureSpec);
        if (childCount > 0) {
            height = getChildAt(0).getMeasuredHeight() + mMargin;
        } else {
            return;
        }
        for (int i = 0; i < childCount; i++) {
            View view = getChildAt(i);
            view.measure(MeasureSpec.makeMeasureSpec(0, MeasureSpec.UNSPECIFIED), MeasureSpec.makeMeasureSpec(0, MeasureSpec.UNSPECIFIED));
            right += view.getMeasuredWidth() + mMargin;
            if (viewWidth < right) {
                right = view.getMeasuredWidth() + mMargin;
                height += view.getMeasuredHeight() + mMargin;
            }
        }
        setMeasuredDimension(MeasureSpec.getSize(widthMeasureSpec), height);
    }

    @Override
    protected void onLayout(boolean changed, int l, int t, int r, int b) {
        int bottom = 0;
        int right = 0;
        int childCount = getChildCount();
        if (childCount > 0) {
            bottom = getChildAt(0).getMeasuredHeight() + mMargin;
        } else {
            return;
        }
        for (int i = 0; i < childCount; i++) {
            View view = getChildAt(i);
            right += view.getMeasuredWidth() + mMargin;
            if (mParentWidth < right) {
                bottom += view.getMeasuredHeight() + mMargin;
                right = view.getMeasuredWidth() + mMargin;
            }
            view.layout(
                    right - view.getMeasuredWidth(),
                    bottom - view.getMeasuredHeight(),
                    right,
                    bottom);
        }
    }

    @Override
    protected void onSizeChanged(int w, int h, int oldw, int oldh) {
        mParentWidth = w;
        super.onSizeChanged(w, h, oldw, oldh);
    }

    @Override
    public void addView(View child) {
        child.setOnClickListener(new OnClickListener() {
            @Override
            public void onClick(View view) {
                if (mOnItemClickListener == null) {
                    return;
                }
                mOnItemClickListener.onItemClick(view);
            }
        });
        super.addView(child);
    }

    public void setMargin(int margin) {
        mMargin = margin;
        invalidate();
    }

    private void initView() {

    }

    public void setOnItemClickListener(OnItemClickListener onItemClickListener) {
        mOnItemClickListener = onItemClickListener;
    }

    public interface OnItemClickListener {
        void onItemClick(View view);
    }

}