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串口通信器使用指导 · App Inventor 2 中文网
...发、半包处理和校验；不会控制继电器或擅自配置设备。Android 手机需要支持 USB 主机/OTG，连接驱动支持的 USB 转串口模块。将模块自己的 TX 与 RX 接在一起形成回显，再连接手机；已有设备固件实现原样回显时可直接用该设备。...
App Inventor 2 UrsAI2UDP 拓展 - UDP广播通信协议 · App Inventor 2 中文网
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对于一个项目，应该开发一个与 ESP8266（项目）通信的 Android 应用程序。为了轻松开发应用程序，选择了 MIT App Inventor 2。
项目中可用的 ESP8266 设备的 IP 地址不应固定。应用程序本身应该确定哪些设备当前处于活动状态以及可...
How do I get the resource id of an image if I know its name?
How do I get the resource id of an image if I know its name (in Android)?
5 Answers
5
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How to prevent going back to the previous activity?
... Thanks you, I tried to find this for about three days. Because of android:noHistory="true" flag for Activity don't work as expected (noHistory flag recreates activity after minimization) and finish() sometimes don't worked for me, but why I still don't understood.
– De...
Fragment MyFragment not attached to Activity
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developer.android.com/reference/android/app/… ...there's also isDetached(), that was added on API level 13
– Lucas Jota
Mar 21 '14 at 12:42
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URLEncoder not able to translate space character
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dependencies {
compile 'com.google.guava:guava:23.0'
// or, for Android:
compile 'com.google.guava:guava:23.0-android'
}
You can use UrlEscapers:
String encodedString = UrlEscapers.urlFragmentEscaper().escape(inputString);
Don't use String.replace, this would only encode the spa...
What is the difference between an IntentService and a Service? [duplicate]
... stops itself when it runs out of work.
Refer this doc - http://developer.android.com/reference/android/app/IntentService.html
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How to get a Color from hexadecimal Color String
...olor class method:
public static int parseColor (String colorString)
From Android documentation:
Supported formats are: #RRGGBB #AARRGGBB 'red', 'blue', 'green', 'black', 'white', 'gray', 'cyan', 'magenta', 'yellow', 'lightgray', 'darkgray'
AndroidX: String.toColorInt()
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Fling gesture detection on grid layout
I want to get fling gesture detection working in my Android application.
18 Answers
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View not attached to window manager crash
... while the AsyncTask is executing and the ProgressDialog is showing.
The Android OS will destroy an activity as soon as it is hidden. When onPostExecute is called the Activity will be in "finishing" state and the ProgressDialog will be not attached to Activity.
How to fix it:
Check for the acti...