Converting pixels to dp
Java code: Kotlin code: Kotlin extension:
android
Android For loop
Change as follow: And the most effective way to do this is to using StringBuilder, Something like:
How to Get JSON Array Within JSON Object?
I guess this will help you.
How to clear gradle cache?
Gradle cache is located at On Windows: %USERPROFILE%\.gradle\caches On Mac / UNIX: ~/.gradle/caches/ You can browse to these directory and manually delete it or run on UNIX system. Run this command will also force to download dependencies. UPDATE Clear the Android build cache of current project NOTE: Android Studio’s File > Invalidate Caches / Restart doesn’t clear the Android build cache, so … Read more
Is there a way to get the source code from an APK file?
Simple way: use online tool https://www.decompiler.com/, upload apk and get source code. Procedure for decoding .apk files, step-by-step method: Step 1: Make a new folder and copy over the .apk file that you want to decode. Now rename the extension of this .apk file to .zip (e.g. rename from filename.apk to filename.zip) and save it. Now … Read more
equivalent to push() or pop() for arrays?
In Java an array has a fixed size (after initialisation), meaning that you can’t add or remove items from an array. The above snippet mean that the array of integers has a length of 10. It’s not possible add an eleventh integer, without re-assign the reference to a new array, like the following: In Java … Read more
Disable back button in android
Override the onBackPressed method and do nothing if you meant to handle the back button on the device.
How to make the corners of a button round?
If you want something like this here is the code. 1.Create a xml file in your drawable folder like mybutton.xml and paste the following markup: 2.Now use this drawable for the background of your view. If the view is button then something like this:
Error checking if Bluetooth is enabled in Android (REQUEST_ENABLE_BT cannot be resolved to a variable)
REQUEST_ENABLE_BT is a request code that you provide. It’s really just a number that you provide for onActivityResult. It will be the requestCode (first parameter) of onActivityResult when the activity returns. You could put any number you want as long as it’s consistent in the return method. In other words, put a line like this in the top of your Activity: … Read more
What are the differences between LinearLayout, RelativeLayout, and AbsoluteLayout?
LinearLayout means you can align views one by one (vertically/ horizontally). RelativeLayout means based on relation of views from its parents and other views. ConstraintLayout is similar to a RelativeLayout in that it uses relations to position and size widgets, but has additional flexibility and is easier to use in the Layout Editor. WebView to load html, static or … Read more