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乐高机器人®组件 · App Inventor 2 中文网
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方法
DrawCircle(color,x,y,radius,fill)
Draw a circle on the screen.
DrawIcon(color,x,y,type,no)
Draw a built-in icon on screen.
DrawLine(color,x1,y1,x2,y2)
Draw a line on the screen.
DrawPoint(color,x,y)
Draw a point on the screen.
DrawRect(color,x,y,width,height,fil...
FragmentPagerAdapter Exists Only In Android.Support.V4.App (and not Android.App)
...:android="http://schemas.android.com/apk/res/android"
android:id="@+id/screen_container"
android:orientation="horizontal"
android:layout_width="match_parent"
android:layout_height="match_parent">
<TextView android:id="@+id/text"
android:layout_width="match_parent" andr...
How do I navigate in the results of Diff
...s
Use
j or ↓ to move down one line at a time
d to move by half the page screen
f to move by a whole page screen
For scrolling upwards use
k or ↑ to move up one line at a time
u to move by half the page screen
b to move by a whole page screen
press q to quit out of the log
It will returns to ...
getting exception “IllegalStateException: Can not perform this action after onSaveInstanceState”
...This can also happen when calling dismiss() on a dialog fragment after the screen has been locked\blanked and the Activity + dialog's instance state has been saved. To get around this call:
dismissAllowingStateLoss()
Literally every single time I'm dismissing a dialog i don't care about it's sta...
Static nested class in Java, why?
....java (resources) file.
Res folder of android contains layouts (containing screen designs), drawable folder (containing images used for project), values folder (which contains string constants), etc..
Sine all the folders are part of Res folder, android tool generates a R.java (resources) file whic...
Plot correlation matrix into a graph
...outline=TRUE, addcolorlabel="no")
## like Chinese wiqi, suit for either on screen or white-black print.
corrplot(M, col = wb, bg="gold2", order="AOE", addcolorlabel="no")
}
For example:
Rather elegant IMO
share
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When to use Storyboard and when to use XIBs
...ings are:
Storyboards are nice for apps with a small to medium number of screens and relatively straightforward navigation between views.
If you have lots of views and lots of cross-navigation between them the Storyboard view gets confusing and too much work to keep clean.
For a large project with...
Automatically add newline at end of curl response body
... escaping is messed up enough that when I put the last curl command on the screen, deleting characters from that curl command deletes the wrong characters.
...
Bootstrap 3.0 - Fluid Grid that includes Fixed Column Sizes
...ed to utilize bootstrap columns but don't want them to collapse at certain screen widths, this is the what you need (use pull-left / pull-right instead of col-md-3, for example).
– Sam
Nov 3 '16 at 6:42
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The application may be doing too much work on its main thread
...mulator using 3 different free libraries, nothing is showing in the layout screen. The logcat is repeating the following message:
...