Unfortunately that’s a misleading and unhelpful error message, as the problem has nothing to do with the Android device screen being locked.
This is what the Mac error message dialog looks like: If your device’s screen is locked, disconnect its USB cable, unlock your screen, and then reconnect the USB cable. After I connected my Nexus 9 tablet to the Mac with its USB cable and then started the Android File Transfer app, I saw this error message on my Mac:Ĭan’t access device storage. Last night I was trying to use the Android File Transfer program on my MacOS system to transfer music to my Google Nexus 9, which now runs Android 6 Android 7.
} catch (PackageManager.Summary: This article shows a solution to the Android File Transfer app “not working on Mac” problem, where you get the Android error message, “Can’t access storage device.” (This solution may also work on Microsoft Windows systems, though I don’t have a Windows system to test with to know for sure.)
Second param: Return that default value when there is no matching key. SharedPreferences sharedPreferences = getSharedPreferences(PREFERENCE_NAME, MODE) comment below if you have declared the sharedPreference as the class variable Programmatically retrieving and modifying the preferences values using the SharedPreferences class Define SharedPreferences Programmatically retrieving and modifying the preferences values using the SharedPreferences class.Use the PreferenceActivity class to create preferences and modify data during runtime.There are 2 ways to use SharedPreferences: SharedPreferences allow you to share data across multiple apps.If you have data that can be represented using name/value pairs, then use the SharedPreferences objectįor example, if you want to store user preference data such as username, background color, date of birth, or last login date, then the SharedPreferences object is the ideal way to store this dataĪndroid provides the SharedPreferences object to help you save simple application data. A relational database management system through the support of SQLite databases.A lightweight mechanism known as shared preferences to save small chunks of data.because users typically expect to reuse data in the futureįor Android, there are primarily three basic ways of persisting data:.Persisting data is an important topic in application development Create Helper class to encapsulate all the complexities Access via Context in the OnCreate Method Define SharedPreferences to Access another App