Technical answers from my Stack Overflow history, with source links and licenses.
Showing 30 of 231 answers tagged android
Exported May 9, 2026
Logging the exception on your gist on Android Nougat reveals the problem: android.os.FileUriExposedException: file:///storage/emulated/0/test.mp4 exposed beyond app through ClipData.Item.getUri() On Android Nougat you...
It would make sense to use a FrameLayout instead of a LinearLayout with one child view. This change is most likely permanent. From the deleted answer and comments, I see you are using this library and this question is...
I would like specific events to happen to each member of the listview when clicked Set an AdapterView.OnItemClickListener on your ListView . based on their content Get the item at the current position and handle the...
A third-party application does not have permission to set a system property. Therefore, the most likely cause of the crash is that the system is setting the package-name as a value for a system property. Other answers...
The path from your comment looks like the file is on a removable SD card. You need special permissions on Android 4.4+ to manage or delete files on an SD card. You will need to use DocumentFile#delete() . For help...
You need to copy your images to assets and use getAssets().open("yourimage.jpg") . Source: Android files in jar library not accessible when using with Unity Android files in jar library not accessible when using with...
You are using getString on "ID" when you should be using getInt . I tested the JSON string you provided in your question. The following code works: Output from running the above code: id=4, name='Vinoth',...
This question is basically asking if it is possible to convert a raster image (PNG) to a vector graphic ( VectorDrawable ). There are many tools out there to do this but they all have limitations. First, you should...
I created a new Spinner in an Activity and as you described, the RippleDrawable is not applied to the Spinner using the v7 compatibility library or on Android 5.0+. This isn't surprising to me; Google often fails to...
Here is something better, IMHO, than the accepted answer. It is derived from this StackOverflow thread: Understanding the Use of ColorMatrix and ColorMatrixColorFilter to Modify a Drawable's Hue Example usage: Copy the...
You can get all permissions on a device using the following code:
There is a public API to get user details but it is restricted to apps which have the "android.permission.MANAGE_USERS" permission. This permission has a protection level of "signature|system" , so unless your app is...
Hopefully I understand your question correctly. If you want both ScrollView s to scroll simultaneously then the code below should do the trick (untested): First create an interface to listen to scroll events: Next,...
The answer from john sakthi does not work correctly if the Bitmap has transparency (PNGs). I modified the answer for correctly getting the red/green/blue averages while accounting for transparent pixels:
You cannot download a file into "assets" or "/res/raw". Those get compiled into your APK. You can download the file to your apps internal data directories. See Saving Files | Android Developers . There are plenty of...
This should work (did not test): attrs.xml styles.xml themes.xml
In AOSP ids normally use underscores. address_id instead of addressId . I have seen attributes use camelCase in AOSP however. That is the best practice. This is from the Code Style Guidelines for Contributors for AOSP:...
You should get the value of "ro.build.product". This is how you should get the codename of a device:
Why is this happening? Drawables share a ConstantState when created from a resource and AppCompat uses setColorFilter to backport tinting. So, when you open a new Activity, TintManager sets a ColorFilter on the Drawable...
Getting the package-name of the app that started your Activity: Getting the app name that started your Activity: Notes: Tested by creating an activity with the following intent filter: Opened Gmail -> composed a new...
Running this from the command-line worked for me: If it returns 0 or 2 the device is in portrait. If it returns 1 or 3 the device is in landscape. Note: I am on a rooted device and have busybox with grep , awk , and...
This is probably the best resource for finding custom views and libraries: https://android-arsenal.com/tag/76 Not recommended, but you could use a GIF on Android or make it into an AnimationDrawable.
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...
Pixels. Always assume pixels and convert to dp if needed. See RecyclerView#dispatchOnScrolled:...
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:...
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 the following method to get a darker primary color: Example:
You would need to use the application's resources to load the theme. I have answered this in another thread here: https://stackoverflow.com/a/41948943/1048340 Here is an example where the package "com.example.theme" is...
we aren't sure if there is a way to still use the same Application ID and SKUs defined for our main app when trying to purchase something related only to the SDK part of the code This would not work because each app...
R.java does not contain methods, only static fields. There is a 65,536 limit on both methods and fields but they are separate. 99% of the time you will hit the method limit before hitting the field limit. If you need...