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AppInventor2中的二进制数据以什么样的形式传递？字节列表、字节数组是什么...
1、byte[] 类型（字节数组）的字段：App Inventor 无法直接处理字节数组，但它们可以作为扩展之间的通用 Object 类型变量进行交换。
MQTT拓展中的字节数组的处理方式就是这种，直接转换成byte[]：
@SimpleFunction(description = "Publishe...
How can I display a list view in an Android Alert Dialog?
..._width="wrap_content"
android:layout_height="wrap_content">
<ListView
android:id="@+id/lv"
android:layout_width="wrap_content"
android:layout_height="fill_parent"/>
</LinearLayout>
In your activity
Dialog dialog = new Dialog(Activity.this);
di...
使用App Inventor 2 控制物联网设备/低功耗蓝牙设备(BLE) · App Inventor 2 中文网
...?f=share", //URL地址 width: 150, height: 150, colorDark: '#000000', //二维码颜色 colorLight: "#ffffff" //背景颜色}); App Inventor 2 中文网 © 2023 - document.write(new Date().getFullYear()); 跟着学（上海）教育科技有限公司 版权...
How does the getView() method work when creating your own custom adapter?
...
getView() method in Adapter is for generating item's view of a ListView, Gallery,...
LayoutInflater is used to get the View object which you define in a layout xml (the root object, normally a LinearLayout,
FrameLayout, or RelativeLayout)
convertView is for recycling. Let's say you hav...
Windbg Step 2 分析程序堆栈实战 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...可以直接显示出变量的值。但是对于一些复杂类型，例如数组，结构，类呀，那就需要借助另外一个命令dt(display type)了
dt argv
Local var @ 0x21fafc Type wchar_t**
0x000d1b90
unsigned short，在C和C++程序中，一般都意味着是wchar_t（宽字...
What is the difference between the states selected, checked and activated in Android?
...nting the Checkable interface. Methods setChecked(), isChecked(), toggle()
ListView (after Honeycomb) calls setChecked() OR setActivated() depending on Android version as below (taken from Android source code):
if (mChoiceMode != CHOICE_MODE_NONE && mCheckStates != null) {
if (child ins...
How do I use pagination with Django class based generic ListViews?
...example, in your views.py:
import models
from django.views.generic import ListView
class CarListView(ListView):
model = models.Car # shorthand for setting queryset = models.Car.objects.all()
template_name = 'app/car_list.html' # optional (the default is app_name/modelNameInLowerCase_...
Android ListView headers
I have ListView that has some kind of events on it. Events are sorted by day, and I would like to have header with date on it for every day, and then events listen below.
...
UrsAI2ByteArray 字节数组扩展：读写二进制数据 - App Inventor 2 拓展 - ...
在技术应用或控制设备时，经常需要使用二进制数据。此扩展允许维护二进制数据字段（字节数组）。
官方页面：https://ullisroboterseite.de/android-AI2-ByteArray-en.html
...VC\\INCLUDE\\iterator(93) : error C2039: “push_front”: 不是“std...
...
copy(ilist.begin(),ilist.end(),
front_inserter(temp));//使用push_front插入,导致错误
解决办法: 迭代器与底层容器之间的操作实际上存在限制关系，也就是说并不是所有的容器都支持诸如push_front之类的操作。这里front_inserter将使用push_front方...