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QUESTION
in my app I use SqLite Database "Templates", where I have table "favourites", constains of four columns "id", "description", "imagePath", "category". I would like user to be able use their own images in my app, like this: When user click button, he choose image from gallery, write description and choose category of image. I know I need use Content Values to do this. But how can I do my table has imagePathes, i.e how can I show them later using RecyclerView and Picasso?
...ANSWER
Answered 2021-Jun-15 at 18:26You can load image from device memory:
QUESTION
If I insert a header or footer from the quick part gallery, it usually adds a standalone paragraph character on the next line.
This is extremely annoying because it requires cleanup every time. Is there a way to prevent this behavior? A couple of the default headers from the quick parts gallery do not do this. The ones I've created myself do - for both header and footer.
I've currently got a VBA macro that adds all these headers and footers automatically to documents in a directory, but it doesn't do me much good when I have to go in and hit delete twice for every document anyway. I can find and replace the paragraph markers (^p^p) through the script (which only works in the header), but doing so strips the style from the header. I'd rather these just not be a part of the quick part if that's an option. They weren't there when I saved the part out. Any thoughts?
...ANSWER
Answered 2021-Jun-14 at 13:01I answered the part about why the paragraph mark is showing up in your question posted on Super User. This response is to address using vba to insert a building block. Your vba, though, is not causing the extra paragraph mark. As stated in the response in Super User, that is due to the content of the building block.
If your vba (not shown) opens the header or footer area and pastes content, then a bug in Word would retain the original paragraph mark as an extra. If you are using it, though, through one of the processes shown below, it should not.
A recorded macro will seldom do what you want, especially if you are sharing the template.
Writing a MacroTo do this, you need to know:
The name of the building block
The name (and location) of the template that holds the building block unless the macro is in the same template
How to insert a macro. See Installing Macros and Install/Employ VBA Procedures (Macros).
Building Block Name = "MyBB" (example in this macro, change to fit)
Situation 1 and 1a have the Building Block and the macro in the same template. This simplifies coding because a macro can always tell the name and location of the template that holds it. That information is required to use a macro to insert a building block.
Situation 1 - template holds both the building block and the macro
Here is the macro to insert that uniquely-named building block at the insertion point in the document:
QUESTION
I am writing a new Application on Android 11 (SDK Version 30) and I simply cannot find an example on how to save a file to the external storage.
I read their documentation and now know that they basicly ignore Manifest Permissions (READ_EXTERNAL_STORAGE
and WRITE_EXTERNAL_STORAGE
). They also ignore the android:requestLegacyExternalStorage="true"
in the manifest.xml application tag.
In their documentation https://developer.android.com/about/versions/11/privacy/storage they write you need to enable the DEFAULT_SCOPED_STORAGE
and FORCE_ENABLE_SCOPED_STORAGE
flags to enable scoped storage in your app.
Where do I have to enable those?
And when I've done that how and when do I get the actual permission to write to the external storage? Can someone provide working code?
I want to save .gif, .png and .mp3 files. So I don't want to write to the gallery.
Thanks in advance.
...ANSWER
Answered 2021-Jan-09 at 08:05You can save files to the public directories on external storage.
Like Documents, Download, DCIM, Pictures and so on.
In the usual way like before version 10.
QUESTION
I'm trying to make a profile page where user can upload their profile picture. I have done all the required method but this error pops up:
Unhandled Exception: MissingPluginException(No implementation found for method requestPermissions on channel flutter.baseflow.com/permissions/methods)
a tab should pop up when I press on the IconButton
asking for permission, but in here nothing happens just the above error pops up.
This is the code I did:
...ANSWER
Answered 2021-Mar-29 at 04:44stop the running app, go to terminal > flutter clean > then build the app again
QUESTION
This library has an example to build a gallery based on element ID:
...ANSWER
Answered 2021-Jun-13 at 13:29Just creating IDs on the way:
QUESTION
I am looking for an application or a tool which is able for example to extract data from a 2D contour plot like below :
I have seen https://dash-gallery.plotly.host/Portal/ tool or https://plotly.com/dash/ , https://automeris.io/ , but I have test them and this is difficult to extract data (here actually, the data are covariance matrices with ellipses, but I would like to extend it if possible to Markov chains).
If someone could know if there are more efficient tools, mostly from this kind of 2D plot. I am also opened to commercial applications. I am on MacOS 11.3.
If I am not on the right forum, please let me know it.
UPDATE 1:
I tried to apply the method in Matlab with the script below from this previous post :
...ANSWER
Answered 2021-Jun-12 at 23:37Restating the problem - My understanding given the different comments and your updates is the following:
- someone other than you is in possession of data, which as it happens is 2D data, i.e. an Nx2 matrix;
- using the covariance matrix, they are effectively saying something about the joint distribution of these two dimensions, specifically about the variance;
- if they assume a Gaussian distribution, as is implied by your comment regarding 68%, 95% and 99.7% for 1sigma, 2sigma and 3sigma, they can draw ellipses which represent the 2D-normal distribution: these are in fact some of the contour lines associated with the 3D "bell" surface;
- you have obtained the contour lines in a graph and are trying to obtain the covariance matrix (not the original data...);
- you are concerned about the complexity of having to extract the information from each ellipsis.
Partial answer:
- It is impossible to recover the original data, I hope you are already aware of that, but in case you are not let's just note that the covariance matrix is a summary statistic of the data, much like the average, and although it says something about the data many different datasets could happen to have the same summary statistic (the same way many different sets of numbers can give you an average of 10).
- It is possible to somewhat recover the covariance matrix, i.e. the 3 numbers a, b and c in the matrix [a,b;b,c], though the error in doing so will likely be large because of how imprecise the pixel representation is. Essentially, you will be looking for the dimensions of the two axes, for the variances, as well as the angle of one of the axes, for the covariance.
- Unless I am mistaken, under the Gaussian assumption above, you only need to measure this for one of the three ellipses, and then factor by whatever number of sigmas that contour represents. Here you might want to either use the best-defined ellipse, or attempt to use the largest one, which will provide the maximum precision for your measurements (cf. pixelization).
- Also, the problem of finding the axes and angle for the ellipse need not be as complex as what it seems like in your first trials: instead of trying to find the contour of the ellipses, find the bounding rectangle.
- In order to further simplify this process, if your images are color-coded the way you show, then a filter on blue pixels might be enough in terms of image processing. Then simply take the minimum and maximum (x,y) coordinates in order to obtain the bounding rectangle.
- Once the bounding rectangle is obtained, find the equation to your ellipse (that's a question for a math group, but you could start here for example).
Happy filtering!
QUESTION
I have a site with many different gallery categories that display a smaller thumbnail size until the screen width is below 1200px, after which I would like to display the full size instead.
The images are displayed like so:
...ANSWER
Answered 2021-Jun-12 at 17:29You have multiple (2) galleries and multiple images. You need to iterate over all images for all galleries. Something like this
QUESTION
I am using MediaStore
to fetch the absoluteImagePaths
and feed it to Glide
in adapter class.
currently I am using MediaStore.MediaColumns.DATA
to get the path. But, Recently google deprecated that api and may not work in near future. So, what is the replacement for this?
ANSWER
Answered 2021-Jun-12 at 07:47In Kotlin use this:
QUESTION
I'm trying to use a SimpleDialog
to select an image from Gallery
or Camera
but I'm getting the run error type 'SimpleDialog' is not a subtype of type '(() => void)?'
This is my function to call the dialog box
ANSWER
Answered 2021-Jun-11 at 11:50try to this way implement third dialog
QUESTION
I want to analyze my Next.js build with source-map-explorer. Can someone please help me with the script?
With React (CRA), I use the following script:
...ANSWER
Answered 2021-Jun-11 at 06:35You'll need to enable source map generation for the production build in your next.config.js
file as it's disabled by default.
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