I am creating OMR scanner in java. I have List of which contains contours from image. i want to create array of List. how can i accomplish it? this is what i have right now What i want to do is so that i can store array of countours() for each question. Like [1] contour1,contour2,contour3,contour4,contour5 [2…
Tag: android
Convert indefinitely running Runnable from java to kotlin
I have some code like this in java that monitors a certain file: This is my kotlin code: I dont understand what Runnable I should pass into mHandler.postDelayed. What is the right solution? Another interesting thing is that the kotlin to java convertor freezes when I feed this code. Answer Lambda-expressions …
Convert string to date (CEST works fine, GMT+02:00 doesn’t work)
Question Why is my Android app unable to parse String str1= “Tue Jun 20 15:56:29 CEST 2017”? I found some similar questions, but none of them helped me. Sidenotes In my project I have some Java applications which are running on a computer and some Android applications. They are able to communicate…
android.content.res.Resources$NotFoundException – /res/color/file.xml
I’m trying to implement the Color State List Resources in my android application, following Android developer guide Color State List Resource | Android Developers. So I created two resource files button_text.xml and button_background.xml in the directory res/color/ and referred them in the with @color/b…
Click button to pass data from edittext to textview in the same page
I want to create a simple program by put data in edit text to display in text view in the same activity.it is look like below image. How can I do this? Thanks. Answer Hope it helps
How can I Convert Calendar.toString() into date using SimpleDateFormat.parse()?
I’m developing an Android app that uses a database, every time that the user insert a new register the current data and time is save in the db using So, When I retrieve the data from the db, got a String like this: java.util.GregorianCalendar[time=1496007575129,areFieldsSet=true,lenient=true,zone=Americ…
Take a screenshot – Background Service
I’m trying to take a screenshot using a background service. This service is like a Facebook chathead, but I want it to take an screenshot when I do a click. I’ve developed some code but it doesn’t work. The last I’ve tried was: But is taking an screenshot to my button not to the screen…
Difference between a class and object in Kotlin
I’m new to Kotlin and have recently converted a simple file from java to Kotlin. I am wondering why the Android converter changed my java class to a Kotlin object. Java: Converted Kotlin: Why wasn’t it: Any help would be greatly appreciated thanks. Answer A Kotlin object is like a class that can&#…
In for each loop i want to skip “, ” in last iteration
I want to skip printing “, ” in last iteration. I want output like name, name, name Output now i am getting is name, name, name, Answer You can append the comma before you append the name. Like this:
Android Volley: select data from MySQL database by id specified by user
I’m writing a simple Android application using Volley. I’d like to know how to select a first name and a last name from MySQL database by ID, which user enter into editText in application. This is my PHP script: If I specified the ID in the code, it returns a data in JSON, which I demand, so the s…