android-sharedpreferences

问题 I currently am saving usernames and passwords in different shared preferences files. I want to load every value saved in the XML file, not just the first. How would this be written? 回答1: One way you could do it is the following: //if you are running the code inside from an Activity Context context = this; SharedPreferences userSharedPrefs = context.getSharedPreferences("USER_NAME_PREFS", MODE_PRIVATE); SharedPreferences pwdSharedPrefs = context.getSharedPreferences("PWD_PREFS", MODE_PRIVATE);

问题 What is the difference between java.util.prefs.Preferences and android.content.SharedPreferences ? Looks like they are for similar things - you can put and get a value by a key in both of them, but Preferences looks like something more difficult and belongs more to the OS than to an app. 回答1: Preferences is a core java class link1 java.util.prefs.Preferences : This class allows applications to store and retrieve user and system preference and configuration data. This data is stored

问题 I want to show 3 fragments in my Activity and load data from json in any fragments ! I need to show website data into Recyclerview with OkHTTP v3 library. I want to show this data for offline, I mean, if user turn off data/wifi show this datas for offline . but i do not want use SQLite Database ! For this idea i use SharedPreference for save data and when disable network show show to offline data from this Preference . I write below codes, but when disable network not show me datas the

问题 I want to show 3 fragments in my Activity and load data from json in any fragments ! I need to show website data into Recyclerview with OkHTTP v3 library. I want to show this data for offline, I mean, if user turn off data/wifi show this datas for offline . but i do not want use SQLite Database ! For this idea i use SharedPreference for save data and when disable network show show to offline data from this Preference . I write below codes, but when disable network not show me datas the

问题 I have the application with coding key, that should be visible from all parts of the application. It has to have a default value and an ability to be changed from one of the activities. How can I set this default value? 回答1: To save default value you have Two options . 1. SharedPreference 2. Database. Try with SharedPreference Create Helper class. public class SharedPreferencesHelper { private static final String TAG = "SharedPreferencesHelper"; Context context; SharedPreferences

问题 This is the app view: and here is my activity code: public class Quiz extends AppCompatActivity { public static int point; public static int i = 0; RadioGroup radioGroup; public static int totalPoint =0; int arrValues[]={0,0,0,0}; int iPosition=0; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_quiz); i = 0; final RadioButton radioButton1 =(RadioButton) findViewById(R.id.number_1); final RadioButton

问题 Whenever I run my Android app for the first time after installation and access the shared preferences, I get this system error - remove failed: ENOENT (No such file or directory) : /data/user/0/com.example.ap/shared_prefs/com.google.android.gms.appid.xml.bak I am not able to figure out what this error means. Any help will be appreciated. Thanks Code to access shared preferences - String setOrNot; SharedPreferences sharedPref = getSharedPreferences("LastFetchTimeFile",MODE_PRIVATE); if

问题 I'm a beginner trying to understand sharedpreferences . Everything is going smoothly as my program of shared preferences run as I want it to be . My inputs are in activity 1 and using shared preferences, I call them back in activity 2. But how can I call the inputs from activity 1 to activity 3 using shared preferences by just using a button from activity 2? 回答1: Store sharedpreference to Constant class and use static variables than set and get values from that class anytime you want. Setting

问题 How i can pick mp3 file from sdcard in android preferenceScreen menu.. here is my preferenceScreen: <PreferenceScreen xmlns:android="http://schemas.android.com/apk/res/android"> <PreferenceCategory android:title="@string/app_setting"> <Preference android:title="@string/ChooseRingtone" android:key="sdPref" /> </PreferenceCategory> </PreferenceScreen> here my SettingActivity: public class SettingsActivity extends AppCompatPreferenceActivity{ @Override public void onCreate(Bundle

问题 Good day all, I am working on a practice app that involves fragments, keeping track of data, and SharedPreferences , Here is the scenario, I have a questionnaire-like app, it will ask the user 15 questions but for the sake of this example i'm going to say five(5) and use random questions with yes and no buttons as options.It will look something like this: |Question 1: Are you a citizen?| yes/no |Question 2: Are you human?| yes/no |Question 3: Do you sleep a lot?| yes/no |Question 4: Do you