The below is the sample code I’m trying to get the selected value from spinner on setOnClickListener method for the Button validateUser. Answer Toast needs to be shown. use .show() at the end. Toast.makeText(getApplicationContext(), “Button is Selected”, Toast.LENGTH_SHORT).show();
Tag: android
How to specify the JDK version in Android Studio?
Android Studio is giving me a Gradle build error that looks like this: Now it gives me these clickable prompts: And I have already downloaded and installed JDK 7. The problem is when I go to select it in the “File System” i can only find a directory named 1.6.0 JDK. Furthermore, the installation o…
Error code -7 when trying to install release APK
I’ve taken all appropriate steps to create the release APK. (Demonstration of steps required) My device (Nexus 7 2012) is set to allow installs from unknown sources. I emailed the APK (app-release.apk) to myself and attempted to open it from GMail, as this should work. EDIT: I apologize, I also should h…
Best way to implement View.OnClickListener in Android
Suppose we have an Activity with a lot of views on which OnClickListener is to be registered. The most common way to implement this is to let the Activity-Subclass implement the OnClickListener, something like this: The way I like to implement it is to create a private class inside the Activity-Subclass and l…
Android – Send Telegram message to a specific number
I’m trying to send a Telegram message to a specific number from within my Android app. Right now my code launches Telegram app, and then the user has to select the destinatary. What I want to do is to send the message to the specified number, without having the user select the contact. My code is as fol…
Why doesn’t Android Studio recognize Base64.encodeBase64?
I’m trying run the following code, however I cannot use encodeBase64(). I’ve already tried to import such libraries using Alt + Enter. How can I make it work? Answer use this: instead of what you are using, i also advise you to use: .getBytes(“UTF-8”); instead of data.getBytes(); UTF-8…
HTTP GET with request body RETROFIT
I am using Retrofit to make api calls in my android application. I have to submit a @Body of JSON I get error message Have you any idea? Answer To send data along with your Get Request you can do the following: as said in this SO answer, Server semantics for GET, however, are restricted such that a body, if
Error: This fragment should provide a default constructor (a public constructor with no arguments)
My class extends DialogFragment like this: And this is how i am using it in Activity: And calling like this: But I am always getting : Answer The newer version of Android SDK forces you to get a empty, no-args constructor. It’s now a good practice to do this. This allows you to save the instance state i…
Java – WebView What event handles (watches) URL changes – Android
The app does a login to a web application using WebView. Once in the webview, the webview appears to handle everything for you as it should based on the user’s clicks. However I need to review on each event if the URL changes to a specific logout URL. How can I return the user to the app itself when the
Why and how apply thresholding to get better matched features
in the below code, i am doing descriptor matching using BRUTFORCE algorithm. i read som tutorial but they were writtin in C++, and i found that, always after the matching process, the resultant MatOfDMatch object from should be converted to DMatch objectas follows and the dMtchList should be sorted Ascendingl…