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How to delete all temp files which created by createTempFile when exit an App in android?
Delete the files in onDestroy if isChangingConfigurations() is false or isFinishing is true . Example:
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Showing 30 of 268 answers
Exported May 9, 2026
- 17score11.5KviewsyesstatusCC BY-SA 4.0
Regular expression matching Android package name
A valid Android package name is described in the AndroidManifest documentation for the package attribute: The name should be unique. The name may contain uppercase or lowercase letters ('A' through 'Z'), numbers, and...
- 17score29.5KviewsnostatusCC BY-SA 3.0
Change title font of Alert Dialog box
No answers provide a way to change the title typeface of an AlertDialog . Here is what I have done: Create the below class: Add the following utility method: Finally, set the typeface when creating your AlertDialog :
- 17score79.1KviewsnostatusCC BY-SA 3.0
change edittext cursor color
Here is, what I think, a better solution than what @Adem posted. Java: XML:
- 17score49.5KviewsnostatusCC BY-SA 3.0
How can I start android application info screen programmatically?
Old question, improved answer:
- 16score6.4KviewsyesstatusCC BY-SA 3.0
Last Accessed Time of any file in Android
You can get the last access time using stat or lstat . The two methods, android.system.Os.stat(String path) and android.system.Os.lstat(String path) , were made public in Android 5.0. On previous Android versions you...
- 15score3.3KviewsyesstatusCC BY-SA 3.0
Get the font name from the file from the asset folder
You will need to parse the font file. I will first paste example code on getting the font name. Then I will paste the code I extracted and modified from Apache FOP . Example usage: Copy the following classes to your...
- 15score10.7KviewsyesstatusCC BY-SA 3.0
CardView setCardBackgroundColor won't work
Change to You are using the value from R.color instead of the value you set in your XML.
- 14score47.3KviewsnostatusCC BY-SA 3.0
Check if device is plugged in
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:
- 14score6KviewsnostatusCC BY-SA 3.0
PopupMenu Icon doesn't show
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) :
- 13score40.8KviewsnostatusCC BY-SA 3.0
AppcompatActivity Error with Android studio
Update your support library to 23 and your compileSdkVersion to 23 in build.gradle. Then sync your project with gradle files. Also, Google Play Services is now 7.8.0
- 13score19KviewsnostatusCC BY-SA 4.0
How to change color / appearance of EditText select handle / anchor?
How to do it from code:
- 12score12.6KviewsyesstatusCC BY-SA 3.0
Android how to read obfuscated Java code after getting through reverse engineering
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...
- 12score8.9KviewsyesstatusCC BY-SA 3.0
How to delete app cache for all apps in Android M?
Is there an option to delete the cache of all apps or certain apps in Android M? A third-party app cannot delete the cache of another app in Android 6.0+. The protection level of Manifest.permission.CLEAR_APP_CACHE...
- 11score20.6KviewsyesstatusCC BY-SA 3.0
Java JSoup error fetching URL
Set the user-agent header: Example: Stack Exchange Inbox Reputation and Badges source: https://stackoverflow.com/a/7523425/1048340 Perhaps this is related:...
- 11score5.7KviewsyesstatusCC BY-SA 3.0
Is it ok to check legality of installing paid android app by checking getInstallerPackageName?
You should not use PackageManager#getInstallerPackageName to check if the app was installed from Google Play or for licensing purposes for the following reasons: 1) The installer packagename can change in the future....
- 11score1.8KviewsnostatusCC BY-SA 3.0
How to make an application's vector drawable override a library's vector drawable?
When the library project is built, the VectorDrawable creates PNG files for each density and places the original VectorDrawable in drawable-anydpi-v21 . If you place your VectorDrawable in drawable-anydpi-v21 in your...
- 11score3.5KviewsyesstatusCC BY-SA 3.0
Do I need runtime permission check to write into getExternalFilesDir() path in marshmallow?
The documentation states: Starting in KITKAT, no permissions are required to read or write to the returned path; it's always accessible to the calling app. This only applies to paths generated for package name of the...
- 11score10.5KviewsnostatusCC BY-SA 4.0
How to get Advertising Id using adb?
Is there an equivalent command for retrieving Advertising Id? There is no equivalent command but it is possible if you use grep . The following command works on rooted devices
- 10score5.9KviewsyesstatusCC BY-SA 3.0
How to grant root access without SuperSU
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...
- 10score5.6KviewsyesstatusCC BY-SA 3.0
How does Snapchat detect XPosed Framework?
SnapChat uses Google's SafetyNet Attestation API and does not specifically check if XPosed is installed. SnapChat runs SafetyNet the first time the app is launched. To make sure SnapChat does not specifically check for...
- 10score2.9KviewsyesstatusCC BY-SA 3.0
Unable to install some apps from Google Play on customized AOSP: Item is not available. Reason: 9
If you pull the Play Store APK from your device you can decompile it. I decompiled the APK and did a simple search for your error message. The error message can be found in the class...
- 10score337.1KviewsnostatusCC BY-SA 3.0
Using ADB to capture the screen
You can read the binary from stdout instead of saving the png to the sdcard and then pulling it: This should save a little time, but not much. source: Read binary stdout data from adb shell?
- 10score146.1KviewsnostatusCC BY-SA 3.0
How can I change the color of AlertDialog title and the color of the line under it
This will set the color for the title, icon, and divider. Bound to change with any new Android version. Remember to call dialog.show() before calling this method.
- 9score1.3KviewsyesstatusCC BY-SA 3.0
How Do We Identify If an Android Device Is Running Official Android 7.0+ Freeform Multi-Window Mode?
SystemUI uses the following to determine if freeform multi-window mode is available: See:...
- 9score12.7KviewsnostatusCC BY-SA 3.0
Android theme name from theme ID
Using packageInfo.applicationInfo.theme will return the theme for the entire app and not each activity. This is hacky, but should get the theme for the current activity/context: I know this is an old question, but...
- 9score2.6KviewsyesstatusCC BY-SA 3.0
How to read kerning pairs table from TTF file in Android
What I want to know is if there is a possibility to read kerning pairs from typeface using Android API. There is no public API to read kerning pairs from a TTF file. However, I pulled the relevant code from Apache FOP...
- 9score66.9KviewsnostatusCC BY-SA 3.0
Understanding the Use of ColorMatrix and ColorMatrixColorFilter to Modify a Drawable's Hue
The below class is an improvement on the answers that have already been posted. This makes it easier to read and create a ColorFilter from a Bitmap . Example usage:
- 9score61.7KviewsnostatusCC BY-SA 3.0
android get Bitmap or sound from assets
The accepted answer never closes the InputStream . Here is a utility method for getting a Bitmap in the assets folder:
- 8score3.6KviewsnostatusCC BY-SA 3.0
Syntax highlighting on android EditText using Span?
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...