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AppInventor2如何通过socket给网络发16进制的数据？ - App应用开发 - 清泛I...
问：app inventor的给网络发16进制指令的方法，可以赐教吗？软件只能发ASCLL码？没办法收发HEX，蓝牙组件的有写字节功能，TCP网络组件没有。
答：
发送文本消息时，hexaStringMode设为 false；发送16制消息时，hexaStringMode设为 tru...
【课题讨论】AppInventor2的全局变量是否有大小限制？ - App应用开发 - 清...
...是限制了.岂不是水管卡死
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数字变量肯定是有上限的，具体是多少位的、上限多少有待调查一下。
文本变量初步看是没有看到全局变量有大小限制。不过参考高级语言来看，毕竟是栈上分配的变量，是有限制的，不过上限...
输入框输入内容为空的提示编写求助 - App Inventor 2 中文网 - 清泛IT社区...
要如何编写实现就是如果三个文本输入框没有进行填写的话，对话框会进行提示呢（要对文本框的填写情况进行一个是否填写的判断，但是自己尝试了一下弄不出来）
就一个非空判断，参考如下：
App Inventor 2 发表于 ...
位置传感器经纬度为0的问题 - 用户反馈 - 清泛IT社区，为创新赋能！
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[图片]
清泛:
看看是不是权限问题
Pursuer丶:
是这样的
Pursuer丶:
他刚进来的时候是好的 然后跳到第二个屏幕 再返回第一个 就变0,0了
Pursuer丶:
一开始初始化的时候传感器经纬度 没问题
Loop through all the files with a specific extension
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No fancy tricks needed:
for i in *.java; do
[ -f "$i" ] || break
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done
The guard ensures that if there are no matching files, the loop will exit without trying to process a non-existent file name *.java. In bash (or shells supporting something sim...
How to specify function types for void (not Void) methods in Java8?
I'm playing around with Java 8 to find out how functions as first class citizens. I have the following snippet:
4 Answers
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Create array of regex matches
In Java, I am trying to return all regex matches to an array but it seems that you can only check whether the pattern matches something or not (boolean).
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How to convert Strings to and from UTF8 byte arrays in Java
In Java, I have a String and I want to encode it as a byte array (in UTF8, or some other encoding). Alternately, I have a byte array (in some known encoding) and I want to convert it into a Java String. How do I do these conversions?
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What is the best way to find the users home directory in Java?
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The bug you reference (bug 4787391) has been fixed in Java 8. Even if you are using an older version of Java, the System.getProperty("user.home") approach is probably still the best. The user.home approach seems to work in a very large number of cases. A 100% bulletproof solutio...
Java Naming Convention with Acronyms [closed]
What is the correct name for the following Java class:
DVDPlayer or DvdPlayer ?
10 Answers
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