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Android - downloading image from web, saving to internal memory in location private to app, displaying for list item

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问题 What I'm trying to do is this: I want my application to download an image from the Internet and save it to the phone's internal memory in a location that is private to the application. If there is no image available for the list item (i.e. it can't be found on the Internet), I want a default placeholder image to display. This is the image that I have defined in my list_item_row.xml file as the default. In my ListActivity file, I am calling an instance of a CustomCursorAdapter class I have

How to save output from python like tsv

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I am using biopython package and I would like to save result like tsv file. This output from print to tsv. for record in SeqIO.parse("/home/fil/Desktop/420_2_03_074.fastq", "fastq"): print ("%s %s %s" % (record.id,record.seq, record.format("qual"))) Thank you. That is fairly simple , instead of printing it you need to write that to a file. with open("records.tsv", "w") as record_file: for record in SeqIO.parse("/home/fil/Desktop/420_2_03_074.fastq", "fastq"): record_file.write("%s %s %s\n" % (record.id,record.seq, record.format("qual"))) And if you want to name the various columns in the file

Best method of saving data

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I've made a class in which I want to keep track of stats of students. I intend to make a GUI later to manipulate this data. My main question is: what is the best way to save and later retrieve this data? I've read about pickle and JSON, but I don't really get how they work (especially about how they save the data, like in which format and where). For persistent data (storing info about students), a database is a good choice. As already mentioned, Python comes shipped with Sqlite3 which is often good enough, for development purposes at least. Introducing Sqlite to Python is easy - just import

Python - How to save functions

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问题 I´m starting in python. I have four functions and are working OK. What I want to do is to save them. I want to call them whenever I want in python. Here's the code my four functions: import numpy as ui def simulate_prizedoor(nsim): sim=ui.random.choice(3,nsim) return sims def simulate_guess(nsim): guesses=ui.random.choice(3,nsim) return guesses def goat_door(prizedoors, guesses): result = ui.random.randint(0, 3, prizedoors.size) while True: bad = (result == prizedoors) | (result == guesses)

Android FileOutputStream location save file

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I have an app that saves into a file (internal storage) data input by the user and at startup it loads this file and shows the contents. I would like to know: where can I find my file ( data.txt )? In addition, if I input "Hello" and then "World" when I load the file, I see "HelloWorld" in the same line but I want "Hello" and "World" printed on two different lines. For saving file: public void writeToFile(String data) { try { FileOutputStream fou = openFileOutput("data.txt", MODE_APPEND); OutputStreamWriter outputStreamWriter = new OutputStreamWriter(fou); outputStreamWriter.write(data);

R - readRDS() & load() fail to give identical data.tables as the original

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Background I tried to replace some CSV output files with rds files to improve efficiency. These are intermediate files that will serve as inputs to other R scripts. Question I started investigating when my scripts failed and found that readRDS() and load() do not return identical data tables as the original. Is this supposed to happen? Or did I miss something? Sample code library( data.table ) aDT <- data.table( a=1:10, b=LETTERS[1:10] ) saveRDS( aDT, file = "aDT.rds") bDT <- readRDS( file = "aDT.rds" ) identical( aDT, bDT, ignore.environment = T ) # Gives 'False' aDF <- data.frame( a=1:10, b

Saving and Reloading ListView using Shared Preferences [Saving onDestroy()]

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问题 I am creating a To Do List. Right now my app adds and removes data to and from a ListView. However, when I close my application the data gets erased. I want to use SharedPreferences to save the data onDestroy(), then when my app opens I wanted the data to reload. However, I don't know how to go about accomplishing this task. Can anybody help me with saving a ListView using Shared Preferences (aka I am looking for code)? There are tutorials for just one shared preference I am looking to

Save images from website inside a WebView?

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I searched around and most of the answers relate to images that are static, i.e just the one image and the URL is already pre-defined. I have a WebView set up to take users to a website full of photos. I want the user to be able to hold down on an image and get the option to save it to their phone. Is that possible? I of course don't know the URL or anything because the images change every day and there are a lot of them. The images on the website all have their own page if that makes any difference. It's just a website with images. No authentication is required. Just like on a Desktop you can

Saving Recorded Audio (Swift)

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I'm trying to record an audio with AVAudioRecorder and then save it so i can use it later. So far I have Made the Recorder and it does the job well and plays the audio after recording but as soon as i close the program, it's gone. what can I do? Here's the entire code I have written so far : class RecordViewController: UIViewController , AVAudioPlayerDelegate, AVAudioRecorderDelegate { @IBOutlet weak var RecordButton: UIButton! @IBOutlet weak var PlayButton: UIButton! var soundRecorder : AVAudioRecorder! var soundPlayer : AVAudioPlayer! var recordedAudio: RecordedAudio! var fileName =

Saving data in edittext when hitting Back button

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So on activity 1 I click a button that takes me to activity 2. In activity 2 I enter some data into an EditText. When I hit the back button on the phone it takes me to activity 1 which is correct but if I hit the activity 1 button again any text that I entered into the EditText is gone. I am sure this is because I am starting a new Intent every time I hit my button and I think I need to be using Flags but I am not certain. Below is my basic MainActivity1 and MainActivity2 without the code I tried that didn't work. **Edit: After exiting the app all saved data needs to be deleted. MainActivity1