Get thumbnail from sd card match it to its file - java

Am building a file manager to use with my app, I need to able to get the thumbnails of the image files and all the videos. That's only possible if this questions are true:
Does android keep thumbnails of all images & videos in something like a database where it can be queried and match to the respective files?
If thats true, how can I get a thumbnail and match it to its file e.g an image?
NOTE: Please don't show me how to get a thumbnail from a media file, that's not what am asking.

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No image display from kml file in Google Maps Android

I'm trying to load a kml file into my google maps app. I'm using this code to load it: code
The code works right, it load the kml file, but then when I clicked on some points, the images doesn't display, seems it like that:
It seems that my url photo contain "*" and it doesn't load the url from there.

Java: How to get the cover image file name of a mp3 file using "Java MP3 ID3 Tag Library" or jaudiotagger

I am just programming a music player in Java, and I want the application be able to show the cover image of the track currently being played.
I have found a lot of libraries that helps with that, as for example: "Java MP3 ID3 Tag Library" or jaudiotagger.
With those two libraries, I have been able to get the cover image from the mp3 file, when the image is embeeded inside the mp3 file.
But I have found some mp3 files that point to an external .jpg image, which is the cover of that mp3, instead of having the image bytes inside the mp3 file ...
I have come to that conclusion by using MediaMonkey application, and looking at the properties of one of such mp3 then in the Artwork tab, I can see the image, and when placing the mouse pointer inside the image, a hint appears with that file name pointing to an image file in the same directory as the mp3.
I do not have any knowledge on how to extract mp3 tags, so I have not been able to get which tag the file name is stored and even less to obtain that file name.
What I am ideally looking for with this question is to know which tag that image file name is stored, and a way to obtain its value with any of the two libraries that I have checked:
"Java MP3 ID3 Tag Library" or jaudiotagger
Any help is welcome
I finally realized that the information of those extra images were not inside the mp3 files ... but only in the same directory.
I could determine that by doing the test of adding more images into one mp3 file (with MediaMonkey), and choosing to add only a link to the image, instead of attaching the image bytes into the mp3 file.
The result was that the mp3 file had not increased its size, and that a new binary file appeared at that directory (probably with the information of images of the mp3 files).
I thought that the image filename was inside the mp3 file, in any of the specific tags used for that, but no library could extract it ... and the thing was that the mp3 itself did not have any link to the image file.
So the solution I have adopted, is to read all .png and .jpg images in the mp3 directory, and choose the most accurate for the front cover image (looking for the word "front" (case insensitive) in those filenames)

Android: Saved Thumbnail should not appear in gallery

I'm creating a thumbnail from an image. The gallery find the image and list it but I don't want that.
In the folder you're storting the image also create a file called ".nomedia". This will prevent the gallery from showing all images in that folder.
If you dont want the whole folder to be excluded. You could prefix the image name with a dot. Example: ".myimagethumb" this wil prevent the gallery from showing your file.

Android Google Search by uploading Image

I am developing Android Application, in my application user will take photo using the camera, that photo has to be uploaded to this url http://images.google.com/searchbyimage I want to know how to upload the file to this URL and how to parse the response and display the images in the Grid.
Google image search is based on meta data and actual file properties. So what you want to get done may not work as you wish to as it will be completely different image.
It might work only with landmarks, for example if you take photo of big ben and search picture on google that might find things related to Big Ben. Same with brands, if you take picture of Coke bottle that might work. But if you take picture of say somebody or some object that will not work I am afraid.

Retrieve an image from my database sqlite

I store images type TEXT which contains the URL of this image in my SQLite database, I want to get in my application in android these images and then display it on buttons
i just want to know how can i do it, some suggestion please
Since you fist need to download the images, I suggest you google for something like "android load images" or "android download images". You will find many good tutorials and libraries.

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