android-10.0

问题 PreferenceManager getDefaultSharedPreferences is deprecated in Android Q , how do I replace it? 回答1: You can use AndroidX support library version of PreferenceManager, i.e. androidx.preference.PreferenceManager and not android.preference.PreferenceManager . remember to add the following to your build.gradle. implementation 'androidx.preference:preference:1.1.1' 回答2: Package preference provides the androidx PreferenceManager: Java: implementation "androidx.preference:preference:1.1.1" Kotlin:

问题 I got Parcelable encountered IOException writing serializable object and it caused by java.io.NotSerializableException: androidx.appcompat.widget.Toolbar error only in Android Version 10 devices. I've searched many results for getting solutions to this problem but every solution I got, was telling to define implement serializable in both inner class and sub inner class and I've done it, still, I got this error only in Android version 10 devices. If I will use transient this keyword to define

问题 Looking at the storage access changes introduced in Android 10 here, location informations are now redacted by default. Google asks us to call setRequireOriginal() on the "MediaStore" object with the media's uri as a parameter. This works when you fetch medias one by one, but what about when we query the ContentResolver for the whole gallery? See this sample: String[] projection = { MediaStore.Files.FileColumns._ID, MediaStore.Files.FileColumns.DATA, MediaStore.Files.FileColumns.MEDIA_TYPE,

问题 With the newer Android Q many things changed, especially with scoped storage and gradual deprecation of file:/// URIs. The problem is the lack of documentation on how to handle media files correctly on Android Q devices. I have a media file (audio) management application and I could not find yet a reliable way to tell to the OS that I performed a change to a file so that it can update its MediaStore record. Option #1: MediaScannerService MediaScannerConnection.scanFile(context, new String[]{

问题 Using a FilePicker I am able to have the user choose a file to upload, pass it to an IntentService, and upload it immediately via that intentService if device has network. But if there is no network, I need to save the Uri and attempt upload later once the devices gets network. This re-attempt is failing. It throws "Permission denial" exception when I try to start the service during the re-attempt. Please let me know what might be wrong. Appreciate your help. FILEPICKER -----------

问题 If I call DocumentFile.fromTreeUri() on main directory and I list its content, it returns all DocumentFile object related to folders and files contained in the directory as expected, but when I try to call DocumentFile.fromTreeUri() on the Uri of one of the DocumentFile folders inside it, rather than returning all DocumentFile objects related to folders and files contained in the subdirectory as expected, it actually returns exactly the same content of the call on its root Uri E.g. I have a

问题 I'm trying to comply with the Google requirements to request the permission ACTIVITY_RECOGNITION, for Android 10, but I don't seem to understand why there's no permission popup showing , like with the other permissions (ie, Location, storage,...) The code I have is: if (ContextCompat.checkSelfPermission(this, Manifest.permission.ACTIVITY_RECOGNITION) != PackageManager.PERMISSION_GRANTED) { Log.d("TAG", "PERMISSION 'ACTIVITY_RECOGNITION' NOT GRANTED"); ActivityCompat.requestPermissions(this,

问题 The splash activity of my app works well on all devices except on an Android 10 device that I have just recently updated. Here is my code: public class SplashScreen extends AppCompatActivity { @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); if(FirebaseAuth.getInstance().getUid() != null) startActivity(new Intent(this, HomeActivity.class)); else startActivity(new Intent(this, LoginActivity.class)); finish(); } } I have also tried navigating

问题 In Android 10, some manufacturer comes with the new feature in a battery optimization setting (see the picture). My foreground service getting killed by OS after some time when the screen is off. I have used the foreground service with notification. This code is working well when the screen is ON in all devices. I am facing this issue in OnePlus and realMe device, both having an android 10 OS. I want to know, Is there any way to solve this problem? Is there any way to know in my device is

问题 I need to save image in sd_card's pictures directory below Android 10.I have implemented scoped storage & This code works in sdk 29 & above, because MediaStore.getExternalVolumeNames was added in sdk 29. Below sdk 29 how to get getContentUri of sd_card . val values = ContentValues().apply { put(MediaStore.Images.Media.DISPLAY_NAME, destinationFileName) put(MediaStore.Images.Media.MIME_TYPE, "image/jpeg") put(MediaStore.Images.Media.RELATIVE_PATH, Environment.DIRECTORY_PICTURES + File