Technical answers from my Stack Overflow history, with source links and licenses.
Showing 30 of 268 answers
Exported May 9, 2026
You can build valid HTML for Android TextView using the HtmlDsl library on Github: https://github.com/jaredrummler/HtmlDsl . The library provides syntactic sugar to make the code more understandable and less error-prone...
The code here let's me believe, that there should be a setOverscan method inside the IWindowManager$Stub but there isn't. Am I doing something wrong or is it just not possible to do what I want to do the way I try to do...
Inner classes will be compiled and the class file will be ClassName$InnerClassName . See: https://stackoverflow.com/a/11388863/1048340 You need to escape the dollar sign character in Kotlin. The following will work:...
Unfortunately, there is no way to set the menu item icon color's tint using a theme or style. You need a method to check if the MenuItem is visible on the ActionBar or in the overflow menu. Both the native and support...
\S matches any non-whitespace character (equal to [^\r\n\t\f\v ] ). I am no regex ninja, but this should work: ^[A-Za-z][A-Za-z ]{0,7} . See: https://regex101.com/r/xQe81c/4
Using adb shell pm grant [PACKAGE_NAME] android.permission.PACKAGE_USAGE_STATS worked for me on several devices. Make sure you added the following to the AndroidManifest : I was also able to use root to grant the...
As mentioned in the issue tracker, a temporary workaround is to add the following to the root build.gradle script: See: https://issuetracker.google.com/issues/68021152#comment12
Pixels. Always assume pixels and convert to dp if needed. See RecyclerView#dispatchOnScrolled:...
On Android M+ you can use the BatteryManager service via getSystemService(BATTERY_SERVICE) . On devices running pre-M you can use a sticky broadcast as mentioned by others. Example:
You can use an unconditional loop: You can also look into tools like inotifywait or fsmon depending on what you are trying to accomplish. You can also install busybox for Android which contains the watch command.
Change to The >> appends to a file or creates the file if it doesn't exist. The > overwrites the file if it exists or creates it if it doesn't exist. https://serverfault.com/a/196735
ImageIO.read(file) should return a BufferedImage . You can also use PixelGrabber to get a specific color. Example: ToolkitImage also has a method to get the BufferedImage but may return null: Why does ToolkitImage...
TL;DR: To create a FlipFont you need a valid font file and XML file in assets. The APK needs to be signed with Monotype's private keystore, which isn't possible. Samsung and other manufacturers use Monotype's FlipFont...
The method is hidden with @hide . The method also requires the system permission android.Manifest.permission.MANAGE_USERS . This permission cannot be granted to third-party apps. UserManager#getUsers() documentation:...
You can use toybox find : Toybox is included with Android 6.0 (Marshmallow) and all later Android versions.
If I remove all spans before setting the new ForegroundColorSpan then I get the desired behavior. Unfortunately, this is a lot more work if an EditText has a lot of text. What I did for a fix: I'm not sure what changed...
You can use ^[^ ]+ . Example: See: https://regex101.com/r/aZYgvC/1
SystemUI uses the following to determine if freeform multi-window mode is available: See:...
Shorter than the other answers: Is it better? I'm not sure. As long as it works and you understand it, I don't see a reason to change it.
You will need to use reflection to tint the select handles (bubbles). I wrote the following class this morning: Example usage: EditTextTint.java : Note: This should work from Jelly Bean to Nougat. However, since it uses...
You can use the following method to get a darker primary color: Example:
The MenuBuilder is a hidden class but does contain a method to show icons. You will need to use reflection to show the icons in the menu. Try adding this in showPopop(View, int) :
The overflow menu item doesn't have a resource id. I found the overflow view by traversing the toolbar. The debugger showed an id of -1 and the Hierarchy Viewer showed no resource-id. Here is how I found the overflow...
Using string.indexOf(s) will get the first occurrence. Instead of having a map of keywords and using indexOf you could use a regular expression. I wrote this up real quick as an example: Screenshot of example EditText...
It is a deprecated feature: https://code.google.com/p/android/issues/detail?id=235625 There is an option in Android Studio to "Show Package Details". For manual SDK and AVD management, please use Android Studio. For...
Delete the files in onDestroy if isChangingConfigurations() is false or isFinishing is true . Example:
I want to be able to bypass this step and let my app get root permission programmatically without having to click on the "Grant" button on the SuperSu dialog. You can't. The user must grant your app root access. Unless...
I would suggest using an architecture where an event bus might not be required. An event bus is still useful and I think you can find what you are looking for in their getting started guide . Some example code:
You can query MediaStore for a directory size on internal storage. This is much faster than a recursive method getting the length of each file in a directory. You must have READ_EXTERNAL_STORAGE permission granted....
There isn't a magical tool that will refactor obfuscated code into a buildable project. Most likely, you won't be able to decompile and de-obfuscate an APK to be clean and maintainable code. This is a good thing. There...