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App Inventor 2开发简单计算器 - App Inventor 2 中文网 - 清泛IT论坛，有思想、有深度
...字——后数；←（回退）：用于从尾部清除后数中的一个字符；±（相反数）：用于求相反数，如果后数不为0，则运算对后数生效，如果后数为0且前数不为0，则对前数生效；也可以理解为对屏幕上显示的数生效；
二、功能描...
Why doesn't requests.get() return? What is the default timeout that requests.get() uses?
...tion will fix this for all requests - even in many dependent libraries and sdk's. When patching libs, be sure to patch supported/documented functions, not TimeoutSauce - otherwise you may wind up silently losing the effect of your patch.
import requests
DEFAULT_TIMEOUT = 180
old_send = requests....
Moving and vanishing lines of code; trouble with Eclipse's XML Editor
...droid-review.googlesource.com/#/c/44936/
Instructions for easily updating SDK Tools and the Eclipse ADT plugin are here: http://tools.android.com/preview-channel
-- Tor
(from the Android tools team)
share
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How to print the ld(linker) search path
...lications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.9.sdk/usr/lib
Framework search paths:
/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.9.sdk/System/Library/Frameworks/
[...]
The -Xlinker option of gcc above ju...
Get DOS path instead of Windows path
...t like this:
c:\>shortNamePath "c:\Program Files (x86)\Android\android-sdk"
c:\PROGRA~2\Android\ANDROI~1
Edit: here's a version that uses the current directory if no parameter was supplied:
@ECHO OFF
if '%1'=='' (%0 .) else echo %~s1
Called without parameters:
C:\Program Files (x86)\Androi...
Android webview & localStorage
...o had to make sure you target at least Android 2.1 onwards: add android:minSdkVersion="7" to your manifest and change the Project Build Target (in eclipse) to be 2.1 at least.
– danmux
Nov 19 '11 at 18:49
...
SecurityException: Permission denied (missing INTERNET permission?)
...really do and what would be the consequences) than yours, because standard SDK (and most apps are written with that SDK in mind) simply does not behave that way. So I strongly doubt this problem occurs on "standard", non-rooted device with stock (or vendor like Samsung, HTC, Sony etc) ROM.
I do no...
How to detect if app is being built for device or simulator in Swift
...ft Compiler - Custom Flags > Other Swift Flags
Select Any iOS Simulator SDK in this drop down
Now you could use this statement to detect simulator:
#if IOS_SIMULATOR
print("It's an iOS Simulator")
#else
print("It's a device")
#endif
Also you could extend UIDevice class:
extension U...
How do I update the notification text for a foreground service in Android?
...ification getMyActivityNotification(String text){
if(Build.VERSION.SDK_INT>=Build.VERSION_CODES.O){
((NotificationManager)getSystemService(Context.NOTIFICATION_SERVICE)).createNotificationChannel(
NotificationChannel("timer_notification","Timer Notification",NotificationMa...
How to take emulator screenshots using Eclipse?
...ipse there is a "Screen Capture" button. (Make sure you have your Android SDK and Eclipse plugin up to date, not sure this was always an option). Just press that button and a screenshot of whatever device you have DDMS connected to (either a real Android device or the emulator) will be created and...