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在Flutter中使用 ScrollView滑动组件,如SingleChildScrollView,可通过ScrollController来监听滑动,通常会通过 ScrollController 来获取滑动的距离等,当ScrollController 与对应的滑动组件未绑定成功时,调用如获取滑动位置的方法

double offset = _scrollController.offset;

会抛出 ScrollController not attached to any scroll views 异常

解决方法就是在绑定成功后再调用 ,修改如下

if(_scrollController.hasClients){
double offset = _scrollController.offset;
}



Android报错:java.lang.IllegalStateException: ViewHolder views must not be attached when created.

这个错误很奇怪,先记录下来,错误信息如下,E/AndroidRuntime: FATAL EXCEPTION: mainProcess: com.spacesoftwares.myapplication3, PID: 11575java.lang.IllegalStateException: ViewHolder views must not be attached when crea...

flutter_swiper:Another exception was thrown: ScrollController attached to multiple scroll views.

Another exception was thrown: ScrollController attached to multiple scroll views. 翻译一下:引发了另一个异常:ScrollController连接到多个滚动视图。 Flutter Swiper是一个轮播图组件,内部包含 ...

Android MediaRecorder 录制视频文件没内容

这是初始状态IdleState处理move的逻辑,主要做些校验工作,如果移动不满足要求,就将事件透出去,具体见下:@Override public boolean handleMoveTouchEvent(MotionEvent event) { // 是否符合move要求,不符合不拦截事件 if (!initMotionAttributes(mRecyclerView, mMoveAttr