sharedpreferences

问题 In my application after login I have to save user name and image in shared preference for other pages. I am able to save name in preference but can't get any where how to save image. I am trying something like that- SharedPreferences myPrefrence; String namePreferance="name"; String imagePreferance="image"; SharedPreferences.Editor editor = myPrefrence.edit(); editor.putString("namePreferance", itemNAme); editor.putString("imagePreferance", itemImagePreferance); editor.commit(); I am trying

问题 Looking at the SharedPreferences docs it says: "Note: currently this class does not support use across multiple processes. This will be added later." So in and of itself it doesn't appear to be Thread Safe. However, what kind of guarantees are made in regards to commit() and apply()? For example: synchronized(uniqueIdLock){ uniqueId = sharedPreferences.getInt("UNIQUE_INCREMENTING_ID", 0); uniqueId++; sharedPreferences.edit().putInt("UNIQUE_INCREMENTING_ID", uniqueId).commit(); } Would it be

问题 I've stored user settings in the SharedPreferences in my App. What will happen with the SharedPreferences when I update the App via Google Play Store to a new version of the App? Will the SharedPrefernces still be there after the update or will they be deleted? So far I haven't found an answer on the web or Stackoverflow (may I search with wrong keywords?). Can you point me to some links they describe this process? Edit: Meanwhile I found a other answer too: SharedPreferences behaviour on

问题 I have an ArrayList with custom objects. Each custom object contains a variety of strings and numbers. I need the array to stick around even if the user leaves the activity and then wants to come back at a later time, however I don't need the array available after the application has been closed completely. I save a lot of other objects this way by using the SharedPreferences but I can't figure out how to save my entire array this way. Is this possible? Maybe SharedPreferences isn't the way

问题 I have the following two activity I want to send the values present in'name' and 'subdivision' present in the shared preference to the second activity. I am able to get the values using shared preference but I'm not able to send that value to the second activity. Below is my code...Can anyone help me resolve this ? public class UidScreen extends Activity { EditText editrexts, edits, edites, editess; Button buttons; String userId; LayoutTwoActivity layoutTwoActivity; DatapushService dsp = null

问题 I'm fairly new to Android-Development and I got a general question about How-To: My App gets Sensor-Data from Step-Detector (Detected steps gets added up). Now I need to store those Steps (which will be a lot of Data). The steps should be stored like this: If Todays steps are stored on per Hour basis. Else steps are stored on per Day basis SharedPreferences falls out of this as it only stores KeyValues. But can SQLite handle this? Or is there any other way? A future feature could be to sync

问题 I am working an android project. I want to push notification when android app killed. So, I am creating BroadcastReceiver and Service class. They are working. But, I have a problem. This problem is, when user login my app; I stroge this values with SharedPreferences. But, when I killed app, this SharedPreferences take "null" value. java.lang.NullPointerException: Attempt to invoke interface method 'java.lang.String android.content.SharedPreferences.getString(java.lang.String, java.lang.String

问题 I am having 5 radiobuttons in my application and i want to save their states so that when i exit and then come back to the application then i see the same button clicked which was clicked prior to my exiting the application Following is my code for saving the state private int flag1 = true; private void save(final boolean isChecked) { SharedPreferences sharedPreferences = getPreferences(Context.MODE_PRIVATE); SharedPreferences.Editor editor = sharedPreferences.edit(); editor.putBoolean("check

问题 My Android app mixes a native part (user autentication and secure code retrieval) with an HTML part loaded with loadURL (webpage with javascript Kinetics for some drawing options). Inside one of my javascripts I need to access an external server for data retrieval. This external access needs autentication. I want to use the autentication data stored in my SharedPrefernences during the autentication inside the native part. Is there a way to access shared prefs from inside my javascripts in the

问题 I was trying SharedPreferences and everything works fine. According to the tutorial, after I change some preferences, I should find a folder named shared_prefs and a XML file which contains my preferences under the data folder in DDMS perspective. But mine is empty, why? Btw, I am debugging with real Android phone. Thx. 回答1: If your SharedPreferences are private, you need to be root on your device to see what is in this folder. Check this post for more details: Android: Viewing