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BLE &APP交互学习教程01——下发指令 - 创客硬件开发 - 清泛IT社区，为创新赋能！
BLE模块性价比高，无需配对就可以连接使用，从本节开始，我们着重来学习使用BLE控制和显示。
1.界面设计
2.逻辑设计
3.APP工程
4.下位机工程
{:8_381:}
我想使用照相机组件显示出错 - App Inventor 2 中文网 - 清泛IT社区，为创新赋能！
...pt the arguments: , ["file:///storage/emulated/0/Android/data/edu.mit.appinventor.aicompanion3/files/Pictures/app_inventor_1727434191034.jpg"]
注意： 5秒钟后将报告另一条错误信息。
源码在这里
你好，根据报错信息，你把路径文本值设置给...
如何更改启动屏幕 - App应用开发 - 清泛IT社区，为创新赋能！
...这个新建的login是在screen1后面，如何调换它们的位置，让APP启动时，先从login启动？无法指定启动的屏幕，默认就是特定的Screen1。两种思路：
1、使用“复制屏幕”功能将Screen1复制一份为主屏幕，原来的Screen1改为登录页。
2、S...
求助各位大佬！ - App Inventor 2 中文网 - 清泛IT社区，为创新赋能！
...确显示识别的信息。显示完后一直显示报错警告框，然后app就卡住了{:8_372:}请提供一下报错相关的截图，这个报错信息更为关键！同：https://bbs.tsingfun.com/thread-2349-1-1.html
Best way to get application folder path
...eful for accessing files whose location is relative to the application install directory.
In an ASP.NET application, this will be the application root directory, not the bin subfolder - which is probably what you usually want. In a client application, it will be the directory containing the main ex...
“Unknown class in Interface Builder file” error at runtime
...th it, and prints the warning.
By default, Objective-C targets will have -all_load -ObjC flags set by default, which will keep all of the symbols. But I had started with a C++ target, and didn't have that. Nevertheless, I found a way around this, which keeps the linker aggressive.
The hack I was...
Android - border for button
... supplies updated Material styles for the button in the constructor. Using app:strokeColor and app:strokeWidth you can create a custom border as following:
1. When you use androidx:
build.gradle
dependencies {
implementation 'androidx.appcompat:appcompat:1.1.0'
implementation 'com.googl...
“sending 'const NSString *' to parameter of type 'NSString *' discards qualifiers” warning
I have Constants NSString, that I want to call like:
3 Answers
3
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How to programmatically take a screenshot on Android?
...s", now);
try {
// image naming and path to include sd card appending name you choose for file
String mPath = Environment.getExternalStorageDirectory().toString() + "/" + now + ".jpg";
// create bitmap screen capture
View v1 = getWindow().getDecorView().getRoo...
Android search with Fragments
... to be a better answer: stackoverflow.com/questions/6938952/… This will allow "searching" from within Fragments. True, it's not the official search mechanism provided by Google, but it works just fine.
– Kyle Falconer
Aug 5 '13 at 19:19
...