Android Q 中不推荐使用 PreferenceManager getDefaultSharedPreferences

Question

PreferenceManager getDefaultSharedPreferences is deprecated in Android 10 . How do I replace it?

Answer 1

You can use the Android 10 support library version of PreferenceManager , ie, androidx.preference.PreferenceManager and not android.preference.PreferenceManager .

Remember to add the following to your build.gradle :

implementation 'androidx.preference:preference:1.1.1'

Answer 2

Package preference provides the androidx PreferenceManager :

Java: implementation "androidx.preference:preference:1.1.1"

Kotlin: implementation "androidx.preference:preference-ktx:1.1.1"

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ie change android.preference.PreferenceManager to androidx.preference.PreferenceManager

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Also see PreferenceFragmentCompat , which is the current PreferenceFragment class to use.

Answer 3

If you're just saving and retrieving key-value pairs you can replace:

 prefs = PreferenceManager.getDefaultSharedPreferences(this); 

with:

 prefs = getSharedPreferences(
            "my.app.packagename_preferences", Context.MODE_PRIVATE);

Be sure to use the right file name for the new implementation or your users will lose access to everything saved with getDefaultSharedPreferences(!). The following will get the file name getDefaultSharedPreferences uses:

getPackageName() + "_preferences"

Answer 4

Use Jetpack DataStore , It is a data storage solution that allows you to store key-value pairs or typed objects with protocol buffers. DataStore uses Kotlin coroutines and Flow to store data asynchronously, consistently, and transactionally.

If you're currently using SharedPreferences to store data, consider migrating to DataStore instead.

Setup

dependencies {
        implementation "androidx.datastore:datastore:1.0.0"
}

It also has support for RxJava2 & RxJava3.

Answer 5

Quote from PreferenceManager documentation :

This class was deprecated in API level 29.
Use the AndroidX Preference Library for consistent behavior across all devices. For more information on using the AndroidX Preference Library see Settings .

Answer 6

Kotlin library

implementation 'androidx.preference:preference-ktx:1.1.1'

Kotlin use

Configuration.getInstance().load(this, androidx.preference.PreferenceManager.getDefaultSharedPreferences(this))

Answer 7

Yes, it is deprecated.

Use the AndroidX Preference Library for consistent behavior across all devices. For more information on using the AndroidX Preference Library see Settings.

Follow this -

PreferenceManager

Answer 8

You can import this library at app level gradle

implementation "androidx.preference:preference-ktx:1.1.1"

Then remove imported file from class where you create "PreferenceManager" Press Alt+Enter and import androidx hope you get latest version of preference manager.

Answer 9

implementation "androidx.preference:preference-ktx:1.1.1"

class file PrivateSharedPreferences;

class PrivateSharedPreferences(context: Context) {
private val file = "com.example.com_shared"
private val key = "private_key"
private var sharedPreferences = context.getSharedPreferences(file, Context.MODE_PRIVATE)
private val editor = sharedPreferences.edit()

fun save(ok: Boolean) {
    editor.putBoolean(key, ok)
    editor.apply()
}

fun read() : Boolean {
    return sharedPreferences.getBoolean(key, false)
}

}

read from fragment or adapter;

PrivateSharedPreferences(context).read()

save

PrivateSharedPreferences(context).save(true)