實(shí)際效果圖

采用結(jié)構(gòu)

• PtrFrameLayout 嵌套一個帶下拉刷新的RecyclerView
  PtrFrameLayout是一個自定義下拉刷新布局

• RV內(nèi)部Item包含一個橫向滑動的RecyclerView在頂部

導(dǎo)致的問題：橫向滑動RecyclerView時經(jīng)常容易引起下拉刷新，這種體驗(yàn)很差

解決思路

1. 繼承RecyclerView，重寫dispatchTouchEvent，根據(jù)ACTION_MOVE的方向判斷是否調(diào)用getParent().requestDisallowInterceptTouchEvent去阻止父view攔截點(diǎn)擊事件

2. 通過繼承PtrFrameLayout，重寫requestDisallowInterceptTouchEvent方法，獲取disallowIntercept來判斷是否分發(fā)事件給父View（避免父View獲取事件引起下拉操作）

    @Override
    public void requestDisallowInterceptTouchEvent(boolean disallowIntercept) {
        disallowInterceptTouchEvent = disallowIntercept;
        //子View告訴父容器不要攔截我們的事件的
        super.requestDisallowInterceptTouchEvent(disallowIntercept);
    }```

#### 具體源碼
* 重寫橫向滑動RecyclerView

public class BetterRecyclerView extends RecyclerView {
private ViewGroup parent;

public BetterRecyclerView(Context context) {
    super(context);
}

public BetterRecyclerView(Context context, AttributeSet attrs) {
    super(context, attrs);
}

public void setNestParent(ViewGroup parent) {
    this.parent = parent;
}

private int lastX = -1;
private int lastY = -1;

@Override
public boolean dispatchTouchEvent(MotionEvent ev) {
    int x = (int) ev.getRawX();
    int y = (int) ev.getRawY();
    int dealtX = 0;
    int dealtY = 0;

    switch (ev.getAction()) {
        case MotionEvent.ACTION_DOWN:
            dealtX = 0;
            dealtY = 0;
            // 保證子View能夠接收到Action_move事件
            getParent().requestDisallowInterceptTouchEvent(true);
            break;
        case MotionEvent.ACTION_MOVE:
            dealtX += Math.abs(x - lastX);
            dealtY += Math.abs(y - lastY);

// Log.i("dispatchTouchEvent", "dealtX:=" + dealtX);
// Log.i("dispatchTouchEvent", "dealtY:=" + dealtY);
// 這里是夠攔截的判斷依據(jù)是左右滑動，讀者可根據(jù)自己的邏輯進(jìn)行是否攔截
if (dealtX >= dealtY) {
getParent().requestDisallowInterceptTouchEvent(true);
} else {
getParent().requestDisallowInterceptTouchEvent(false);
}
lastX = x;
lastY = y;
break;
case MotionEvent.ACTION_CANCEL:
break;
case MotionEvent.ACTION_UP:
break;

    }
    return super.dispatchTouchEvent(ev);
}

* 重寫PtrFrameLayout的部分源碼

private boolean disallowInterceptTouchEvent = false;
@Override
public void requestDisallowInterceptTouchEvent(boolean disallowIntercept) {
disallowInterceptTouchEvent = disallowIntercept;

    super.requestDisallowInterceptTouchEvent(disallowIntercept);
}

@Override
public boolean dispatchTouchEvent(MotionEvent e) {
    switch (e.getAction()) {
        case MotionEvent.ACTION_UP:
            this.requestDisallowInterceptTouchEvent(false);
            disableWhenHorizontalMove(true);
            break;
    }
    if (disallowInterceptTouchEvent) {
        return dispatchTouchEventSupper(e);
    }
    return super.dispatchTouchEvent(e);
}