如何解决手动更改首选项时,使“ onSharedPreferenceChanged”运行
我正在选择一个文件目录作为自定义首选项,该首选项本身可以正常工作,但是,我希望摘要作为路径本身,经过一番挖掘后,我发现“ onSharedPreferenceChanged”似乎很完美,但是当我更改首选项值时,不会调用此函数,但会为其他首选项调用该函数。
class SettingsFragment : PreferenceFragmentCompat(),SharedPreferences.OnSharedPreferenceChangeListener {
override fun onCreatePreferences(savedInstanceState: Bundle?,rootKey: String?) {
setPreferencesFromResource(R.xml.preference_main,rootKey)
val filePicker = findPreference("filepicker") as Preference?
filePicker!!.onPreferenceClickListener = Preference.OnPreferenceClickListener {
val i = Intent(Intent.ACTION_OPEN_DOCUMENT_TREE)
i.addCategory(Intent.CATEGORY_DEFAULT)
startActivityForResult(Intent.createChooser(i,"Choose directory"),9999)
return@OnPreferenceClickListener true
}
}
override fun onResume() {
preferenceScreen.sharedPreferences
.registerOnSharedPreferenceChangeListener(this)
super.onResume()
}
override fun onPause() {
preferenceScreen.sharedPreferences
.unregisterOnSharedPreferenceChangeListener(this)
super.onPause()
}
override fun onSharedPreferenceChanged(sharedPreferences: SharedPreferences?,key: String?) {
if (key == "filePicker") {
findPreference<Preference>(key)?.summary =
sharedPreferences!!.getString(
key,Environment.getExternalStoragePublicDirectory(
Environment.DIRECTORY_DOWNLOADS
).toString() + "/ytdl"
)
}
}
}
override fun onActivityResult(requestCode: Int,resultCode: Int,data: Intent?) {
super.onActivityResult(requestCode,resultCode,data)
val uri: Uri = data!!.data!!
if (uri.toString().contains("content://com.android.providers")) {
Toast.makeText(
this,"Don't use \"Open from Downloads\"',select the one with your phone name",Toast.LENGTH_SHORT
).show()
} else {
//Code to change preference vaule
val path_ = FileUtil.getFullPathFromTreeUri(uri,this)
mSharedPreferences.edit().putString("filepicker",path_).apply()
Toast.makeText(this,path_,Toast.LENGTH_SHORT).show()
path = path_
}
}
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