I have an application in which I use the camera, the problem is that when I take the photo, the pixelated image appears in the preview of the Android camera application, here is an example:
I access the camera like this:
val takePictureIntent = Intent(MediaStore.ACTION_IMAGE_CAPTURE)
startActivityForResult(takePictureIntent, TAKE_PICTURE)
As I say, it is in the camera application itself where the image is pixelated, not in my application, where I later receive the image in this way as well.
I have the following lines in my app in a class that acts as if AsyncTaskto include an image in the body of a query HTTP.
I have the following object File:
val file = File(getContext().cacheDir, "fileName")
file.createNewFile()
and then with a FileOutputStreamI write a BitMapin that file in such a way:
val fos = FileOutputStream(file)
fos.write(bitMapData)
fos.flush()
fos.close()
And finally, to write all the bytes in requestthe query, I use:
val bytes = Files.readAllBytes(file.toPath())
request.write(bytes) //La variable request es el OutputStream del objeto HttpUrlConnection
These two functions, readAllBytes()and toPath()they ask me for a minimum API of 26, which is very high, what would be their substitute for smaller APIs.
I am developing an Android app in Kotlin and I have a table PERSONSthat contains people and another table FACESthat contains faces that I associate with people. The idea is that deleting an entry PERSONSwill delete all faces associated with it. I create the tables like this:
const val SQL_CREATE_PERSONS =
"CREATE TABLE " + "PERSONS" + "(" +
"ID" + " TEXT(100) PRIMARY KEY, " +
"NAME" + " TEXT(50)
"); "
const val SQL_CREATE_FACES =
"CREATE TABLE " + "FACES" + "(" +
"ID" + " TEXT(100) PRIMARY KEY, " +
"PERSON_ID " + "TEXT(100), " +
"FOREIGN KEY " + "(PERSON_ID)" + " REFERENCES " +
"PERSONS" + "(" +
"ID" + ") "+
"ON DELETE CASCADE " +
"); "
I have not forgotten to activate the Foreign Keys that are deactivated by default, I do it in the onCreate():
override fun onCreate(db: SQLiteDatabase?) {
db?.execSQL("PRAGMA foreign_keys=ON;")
db?.execSQL(SQL_CREATE_PERSONS)
db?.execSQL(SQL_CREATE_FACES)
}
But when you run the application and delete an entry, PERSONStheir faces are still in the tableFACES
My idea is to obtain all the attributes of a class from an instance of an object of that class, but when obtaining the collection of attributes, it stores them for me in alphabetical order and I want it to be returned to me in the order that they are defined in the builder.
This is my class:
class Empresa(override var id: Long = Long.MIN_VALUE, var uuid: String = "", var nombre : String = "")
And when doing:
var atributos = Empresa().javaClass.kotlin.memberProperties.toString()
I returned:
[id, nombre, uuid]
And the idea is that it returns as it is defined in the constructor (that it does not order them alphabetically):
[id, uuid, nombre]
Any ideas?
Is there a way to evaluate a String in Kotlin like JavaScript's eval()?
For example:
var str = "var x = 5"
eval(str)
println(x) //Y que muestre por pantalla 5
I am inserting the following button in a JPanelas follows:
JButton button = new JButton();
button.setBounds(50, 50, 40, 40);
button.setBackground(Color.RED);
button.setOpaque(true);
this.add(button);
Add that I have the layout of the JPanelas null, in order to play with the positions and the size of the button (that's why I have to put truethe setOpaque(), otherwise the color is not seen):
this.setLayout(null);
The problem is that the result is not what I expected, the button is not painted, but an outer contour as can be seen in the image:
How do I have to do it?
When trying to pass from an object defined in backticks:
var mi_objeto = `{propiedad1: 'a', propiedad2: 'b'}`;
To a real object using the method eval:
var objeto_real = eval(mi_objeto);
It gives me a syntax error, which is fixed if I add parentheses to the definition of mi_objeto:
var objeto_real = eval("(" + mi_objeto + ")");
What is the syntax error when I do the evalwithout the parentheses?
I wanted to know if I can define an object in javascript with string templates (``) and if so, what would be the correct syntax? I mean something like:
var mi_objeto = `{prop: 1, atr: 2}`;
In my application I need to show the date chosen with a DatePicker in a Label. I have the following code:
import UIKit
class ViewController: UIViewController {
@IBOutlet weak var label: UILabel!
@IBOutlet weak var pickerDat: UIDatePicker!
override func viewDidLoad() {
super.viewDidLoad()
pickerDat.addTarget(self, action: Selector("diaHora:"), for: UIControlEvents.valueChanged)
pickerDat.datePickerMode = .date
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
}
func diaHora(pickerDat: UIDatePicker){
let formatoFechaHora = DateFormatter ()
formatoFechaHora.dateStyle = DateFormatter.Style.short
let dat = formatoFechaHora.string(from: pickerDat.date)
label.text = dat
}
}
When choosing the date in the application, the following error appears:
I think the error is in the passage of the action parameter in the method of adding the target, it may be that the new version of Swift does not support that syntax.
I am new to this language. In the project I have not done anything yet, I have only added a button in it View Controllerand when I click it to add the layouts, it does not appear to me to be able to mark the option Add Missing Constraintsas seen in the image:
For what is this?
I have the following basic server:
var express = require('express');
var app = express();
app.get('/', function(req, res){
res.sendfile(__dirname + '/public/index.html');
});
app.listen(8081);In that index.html I have referenced some CSS that are in the same public folder. The route is correct, since if I open the html with the browser it comes out correctly, but if I enter through the server (that is, in localhost:8081) I get the plain html, without the CSS. What do I have to add in my NodeJS server?
I reference the CSS from the index.htmllike this:
<link rel="stylesheet" href="assets/css/main.css" />