android - 触摸从视图组移动到子视图时如何捕获运动事件？

Question

我编写了一个自定义视图组来实现我想要的功能。但我有一个问题需要你的帮助。问题是：手指从视图组移动到子视图。但是当手指放在子视图上时，我错过了触摸事件。我覆盖了视图组的 ViewGroup.onInterceptTouchEvent 和 ViewGroup.onTouchEvent 方法。我喜欢当视图组的 ViewGroup.onInterceptTouchEvnet 返回 true 时，视图组的 ViewGroup.onTouchEvent 将处理运动事件。然后运动事件将发布到视图组的 ViewGroup.onTouchEvent，不会通过视图组的 ViewGroup.onInterceptTouchEvent 方法。当手指从视图组移动到子视图时，运动事件将直接传递给视图组的 ViewGroup.onTouchEvent ，我无法将运动事件分派给子视图。等待你的帮助。请！

This is the Layout :

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context=".MainActivity" >

    <TextView
        android:id="@+id/textview_title"
        android:layout_width="match_parent"
        android:layout_height="50dip"
        android:background="#00ff00"
        android:gravity="center"
        android:text="@string/str_textview_title"
        android:textSize="30sp" />

    <com.example.pullrefreshlayout.PullRefreshLayout
        android:id="@+id/layout_pull_refresh"
        android:layout_width="fill_parent"
        android:layout_height="fill_parent"
        android:layout_below="@id/textview_title" >

        <ListView
            android:id="@+id/listview_content"
            android:layout_width="fill_parent"
            android:layout_height="wrap_content" >
        </ListView>
    </com.example.pullrefreshlayout.PullRefreshLayout>

</RelativeLayout>

This is my ViewGroup , it's a PullRefreshLayou.


@Override
    public boolean onInterceptTouchEvent(MotionEvent ev) {
        Log.i(TAG, "onInterceptTouchEvent action is: " + ev.getAction());

        switch (ev.getAction()) {

        case MotionEvent.ACTION_DOWN:
            mTouchEventY = ev.getY();
            mTouchEventX = ev.getX();

            if (mHeaderView.getBottom() <= 0) {
                return false;
            } else {
                if (mState == STATE_REFRESHING) {
                    return false;
                } else {
                    return true;
                }
            }

        case MotionEvent.ACTION_MOVE:
            double moveDistanceY = ev.getY() - mTouchEventY;
            double moveDistanceX = ev.getX() - mTouchEventX;

            mTouchEventX = ev.getX();
            mTouchEventY = ev.getY();

            if (Math.abs(moveDistanceY) < 2 * Math.abs(moveDistanceX)) {
                Log.d(TAG, "moveDistanceY < 2 * moveDistanceX");
                return false;
            }

            Log.i(TAG, "move distance is :" + moveDistanceY);
            if (isRefreshReady() && moveDistanceY > 3) {
                // 判断ContentView在顶部，而且有下拉的操作，moveDistance还可调大
                return true;
            }

            if (mHeaderView.getBottom() <= 0) {
                return false;
            } else {
                return true;
            }

        default:
            break;
        }
        return super.onInterceptTouchEvent(ev);
    }

    @Override
    public boolean onTouchEvent(MotionEvent event) {
        Log.i(TAG, "onTouchEvent action is :" + event.getAction());

        switch (event.getAction()) {

        case MotionEvent.ACTION_MOVE:

            int moveDistance = (int) (event.getY() - mTouchEventY);
            Log.i(TAG, "move distance is :" + moveDistance);

            if (moveDistance < 0) {
                moveDistance = moveDistance > -mHeaderView.getBottom() ? moveDistance
                        : -mHeaderView.getBottom();
            }

            mHeaderView.offsetTopAndBottom(moveDistance);
            mContentView.offsetTopAndBottom(moveDistance);
            invalidate();

            int headerViewTop = mHeaderView.getTop();
            if (headerViewTop >= 0 && mHeaderViewTop < 0
                    && mState != STATE_REFRESHING) {
                mHeaderView.startUpAnimation();
                mHeaderView.onReleaseToRefresh(mRefreshTime);
                mState = STATE_RELEASE_TO_REFRESH;
            }

            if (headerViewTop < 0 && mHeaderViewTop >= 0
                    && mState != STATE_REFRESHING) {
                mHeaderView.startDownAnimation();
                mHeaderView.onPullToRefresh(mRefreshTime);
                mState = STATE_PULL_TO_REFRESH;
            }

            mHeaderViewTop = headerViewTop;

            mTouchEventY = event.getY();

            break;
        case MotionEvent.ACTION_CANCEL:
        case MotionEvent.ACTION_UP:

            if (mHeaderView.getTop() >= 0) {
                // 刷新
                if (mState != STATE_REFRESHING) {
                    if (null != mPullRefreshListener) {
                        mPullRefreshListener.onRefresh();
                    }
                    mState = STATE_REFRESHING;
                    mHeaderView.onRefresh(mRefreshTime);
                }

                scrollToRefresh();

            } else {
                // 不刷新
                if (mHeaderView.getTop() > -mHeaderViewHeight
                        && mState != STATE_REFRESHING) {
                    mState = STATE_DEFAULT;
                    scrollToClose();
                }
            }

            break;
        default:
            break;
        }

         return false;
    }

OK.