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version:2.8.5

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今天我们主要来分析BaseRecyclerViewAdapterHelper为view提供监听点击事件能力的相关源码。

 public abstract class SimpleClickListener implements RecyclerView.OnItemTouchListener {
private GestureDetectorCompat mGestureDetector;
private RecyclerView recyclerView;
protected BaseQuickAdapter baseQuickAdapter;
public static String TAG = "SimpleClickListener";
private boolean mIsPrepressed = false;
private boolean mIsShowPress = false;
private View mPressedView = null;

@Override
public boolean onInterceptTouchEvent(RecyclerView rv, MotionEvent e) {
    Log.i(TAG,">>>>onInterceptTouchEvent e"+e.getActionMasked());
    if (recyclerView == null) {
        this.recyclerView = rv;
        this.baseQuickAdapter = (BaseQuickAdapter) recyclerView.getAdapter();
        mGestureDetector = new GestureDetectorCompat(recyclerView.getContext(), new ItemTouchHelperGestureListener(recyclerView));
    }else if (recyclerView!=rv){
        this.recyclerView = rv;
        this.baseQuickAdapter = (BaseQuickAdapter) recyclerView.getAdapter();
        mGestureDetector = new GestureDetectorCompat(recyclerView.getContext(), new ItemTouchHelperGestureListener(recyclerView));
    }
    if (!mGestureDetector.onTouchEvent(e) && e.getActionMasked() == MotionEvent.ACTION_UP && mIsShowPress) {
        if (mPressedView!=null){
            BaseViewHolder vh = (BaseViewHolder) recyclerView.getChildViewHolder(mPressedView);
            if (vh == null ||!isHeaderOrFooterView(vh.getItemViewType())) {
                mPressedView.setPressed(false);
            }
        }
        mIsShowPress = false;
        mIsPrepressed = false;
    }
    return false;
}

@Override
public void onTouchEvent(RecyclerView rv, MotionEvent e) {
    Log.i(TAG,">>>>onTouchEvent e"+e.getActionMasked());
    mGestureDetector.onTouchEvent(e);
}

@Override
public void onRequestDisallowInterceptTouchEvent(boolean disallowIntercept) {
    Log.i(TAG,">>>>onRequestDisallowInterceptTouchEvent disallowIntercept"+disallowIntercept);
}

private class ItemTouchHelperGestureListener extends GestureDetector.SimpleOnGestureListener {

    private RecyclerView recyclerView;


    ItemTouchHelperGestureListener(RecyclerView recyclerView) {
        this.recyclerView = recyclerView;
    }
    @Override
    public boolean onDown(MotionEvent e) {
        mIsPrepressed = true;
        mPressedView = recyclerView.findChildViewUnder(e.getX(), e.getY());
        super.onDown(e);
        return false;
    }

    @Override
    public void onShowPress(MotionEvent e) {
        Log.i(TAG,">>>>onShowPress e"+e);
        if (mIsPrepressed && mPressedView != null) {
    //    mPressedView.setPressed(true);
            mIsShowPress = true;
        }
        super.onShowPress(e);
    }


    @Override
    public boolean onSingleTapUp(MotionEvent e) {
        Log.i(TAG,">>>>onSingleTapUp e"+e);
        if (mIsPrepressed && mPressedView != null) {
            if (recyclerView.getScrollState()!=RecyclerView.SCROLL_STATE_IDLE){
                return false;
            }
            final View pressedView = mPressedView;
            BaseViewHolder vh = (BaseViewHolder) recyclerView.getChildViewHolder(pressedView);

            if (isHeaderOrFooterPosition(vh.getLayoutPosition())) {
                return false;
            }
            Set<Integer> childClickViewIds = vh.getChildClickViewIds();
            Set<Integer> nestViewIds = vh.getNestViews();
            if (childClickViewIds != null && childClickViewIds.size() > 0) {
                for (Integer childClickViewId : childClickViewIds) {
                    View childView = pressedView.findViewById(childClickViewId);
                    if (childView != null) {
                        if (in