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解决 App Inventor 2 Runtime Error运行时错误的专业指南 - App Inventor 2...
...赋值。可以通过增加条件判断来避免空指针异常。
数组越界错误
原因：访问数组时，索引超出了数组的范围。
解决方案：在访问数组元素前，检查索引是否在合法范围内。
文件或资源未找到错误
原因：应用尝...
一个自媒体的运营手记：我做公众号已经两年多了 - 资讯 - 清泛网 - 专注C/C...
...了，也就没有在维护了。之前，我通过QQ群和新浪微博发二维码广告积攒了有300多的粉丝，后来由于长时间没有更新，粉丝掉了一些，但是大部分还在。中间停止更新的时间大概有半年多，后来呢，因为平常下班后，回到家也没...
Convert Json Array to normal Java list
Is there a way to convert JSON Array to normal Java Array for android ListView data binding?
14 Answers
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数据科学组件 · App Inventor 2 中文网
...源来应用模型。
异常检测模型仅返回异常列表。
需要 二维图表数据 组件来突出显示图表上的异常情况。
属性
无
事件
无
方法
清洗数据(anomaly,xList,yList)
给定单个异常：[(异常指数，异常值)]
迭代 xList...
App Inventor 2 连接方式：AI伴侣、模拟器、USB · App Inventor 2 中文网
...你手机上的AI伴侣app进行测试。相当于用你手机扫了一次二维码，只是这里变成USB自动帮你做了这件事。和第一种方式本质上是一样的，流程变复杂了些，需要一定动手能力。好处是可以利用手机助手，将手机投屏到电脑上，用...
How to use ArrayAdapter
...xml in layouts, but don't know how to show both reason and long_val in the ListView using ArrayAdapter.
5 Answers
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Calling startActivity() from outside of an Activity context
I have implemented a ListView in my Android application. I bind to this ListView using a custom subclass of the ArrayAdapter class. Inside the overridden ArrayAdapter.getView(...) method, I assign an OnClickListener . In the onClick method of the OnClickListener , I want to launch a n...
How can I maintain fragment state when added to the back stack?
..._a, container, false);
// Find and setup subviews
_listView = (ListView)_rootView.findViewById(R.id.listView);
...
} else {
// Do not inflate the layout again.
// The returned View of onCreateView will be added into the fragment.
...
How to scroll to top of long ScrollView layout?
... i solve from scroll_view.smoothScrollTo(0,0), when we have listview in side the scrollview at that time fullScroll(ScrollView.FOCUS_UP) will not work.
– Kirtikumar A.
Oct 28 '13 at 8:56
...
What is the main purpose of setTag() getTag() methods of View?
...ence to object that references on some parts of layout (that displaying in ListView) instead of findViewById.
static class ViewHolder {
TextView tvPost;
TextView tvDate;
ImageView thumb;
}
public View getView(int position, View convertView, ViewGroup parent) {
if (convertView == n...