Android 滑动冲突

外部拦截

模板代码：

@Override
public boolean onInterceptTouchEvent(MotionEvent ev) {
    boolean intercepted = false;
    //父view拦截条件
    boolean condition;

    switch (ev.getActionMasked()) {
        case MotionEvent.ACTION_DOWN:
            intercepted = false;
            break;
        case MotionEvent.ACTION_MOVE:
            if (condition) {
                intercepted = true;
            } else {
                intercepted = false;
            }
            break;
        case MotionEvent.ACTION_UP:
            intercepted = false;
            break;
    }
    return intercepted;

}

内部拦截

使用内部拦截需要同时重写父 ViewGroup 的onInterceptTouchEvent和子 View 的dispatchTouchEvent方法

父：

@Override
public boolean onInterceptTouchEvent(MotionEvent ev) {
    if (ev.getActionMasked() == MotionEvent.ACTION_DOWN) {
        return false;
    } else {
        return true;
    }
}

子：

@Override
public boolean dispatchTouchEvent(MotionEvent event) {
    //父view拦截条件
    boolean condition;

    switch (event.getActionMasked()) {
        case MotionEvent.ACTION_DOWN:
            getParent().requestDisallowInterceptTouchEvent(true);
            break;
        case MotionEvent.ACTION_MOVE:
            getParent().requestDisallowInterceptTouchEvent(!condition);
            break;
        case MotionEvent.ACTION_UP:
            break;
    }
    return super.dispatchTouchEvent(event);
}