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【解决】模拟器启动失败：ERROR: x86_64 emulation currently requires har...
...rom-Android-SDK\extras\intel\Hardware_Accelerated_Execution_Manager
在线版下载后的目录是：Emulator\from-Android-SDK\extras\intel\Hardware_Accelerated_Execution_Manager
安装：haxm-7.6.5-setup.exe
如果报错，请参考：https://bbs.tsingfun.com/thread-2030-1-1.html
【解决】App Inventor 2 中文版服务启动超时，问题排查 - App Inventor 2 ...
离线版启动失败，报超时错误：
可能性排查如下：
1、安装目录有中文，卸载重新安装，目录不要有中文即可，当然最好也不要有空格。这个逻辑也考虑过做到安装时自动检查，目前有技术细节没解决，后续会继续研究。
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【研究中】高德地图API研究及接入 - App应用开发 - 清泛IT社区，为创新赋能！
...多少，是否透明。1 ~ 7 可以自行试试效果。
道路图简版参考：https://wprd01.is.autonavi.com/appmaptile?x=54658&y=26799&z=16&style=7https://wprd01.is.autonavi.com/appmaptile?x={x}&y={y}&z={z}&style=7复制代码
腾讯矢量（貌似没有用，bad re...
“AppInventor学院”App国内各大市场上架之旅 - App应用开发 - 清泛IT社区...
...系统弹窗没告诉请求相机的目的，因此需要定制弹窗或蒙版信息等其他技术手段，询问是否允许的同时提示权限用途，我们采取了“隐私确认”弹窗的形式，比较简单一些。
APP在申请敏感权限时，应同步说明权限申请的使用...
App Inventor 2 OCR 图片文字识别方案 - App应用开发 - 清泛IT社区，为创新赋能！
...折腾了2天，效果不好，多平台兼容（模拟器，安卓，旧版安卓等），离线模型体积大，编译apk有问题，jni加载.so库逻辑也较为复杂。
总之离线方案并不完美，目前未正式推出。建议还是使用在线版本的 OCRSpace 拓展：
官网：htt...
How to check if a folder exists
I am playing a bit with the new Java 7 IO features, actually I trying to receive all the xml files of a folder. But this throws an exception when the folder does not exist, how can I check if the folder exists with the new IO?
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If a folder does not exist, create it
I use a FileUploader control in my application. I want to save a file in a specified folder. Now I want, if this folder does not exist, to first create it, and then save my file to this folder. If the folder already exists, then just save the file in it.
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Change bundle identifier in Xcode when submitting my first app in IOS
I'm trying to submit my first app in iOS . I have entered iOS Provisioning Portal and I am about to create an app ID.
1...
back button callback in navigationController in iOS
I have pushed a view onto the navigation controller and when I press the back button it goes to the previous view automatically. I want to do a few things when back button is pressed before popping the view off the stack. Which is the back button callback function?
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How to programmatically display version/build number of target in iOS app?
How can I programmatically get the value of the target version , like in the image below?
6 Answers
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