sharedpreferences

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 I've been getting null returns from getting strings from my saved preferences. I'm not sure how savedpreferences worked but my understanding was that when call a sharedpreferences, it creates the keypair file on the phone so you can come back to it later. My program is essentially a string creation application. When you press a button, it creates a string to send as an sms. My settings activity page has four edittexts that save whatever is inside them with a buttonclick and returns to the

问题 Whenever i relaunch my app, getting old values into TextView if some stored by me, but facing a small issue, now after relaunching my app once i do tap on button, it deletes earlier stored data from TextView and shows new one. I am using SharedPreferences in my program to store textview data, which works just fine for me. May i know where i am doing mistake ? see my code below: public class MainActivity extends ActionBarActivity { TextView textViewResult; EditText editTextInput; String

问题 I have stored the checkbox value(check/uncheck) using shared preference,but I face problem while passing the action of checkbox on/after closing and reopening the app. Explantion : A button in different actvity hides/shows on clicking the checkbox(i.e check=shows & uncheck= hides) working correctly. when I close the app and reopen the checkbox stays checked but button is not appearing checkbox code saved using shared preference final CheckBox checkBox = (CheckBox) findViewById(R.id.add_fb);

问题 I am trying to use the mColorPicker and have it running good, it changes the color in the picker but I am trying to get the shared preferences to get the new color so I can use it. So far no luck with this, it doesn't change the color but keeps the default color only. I have the preferences in a separate file and in the main activity is where I want to get the preferences from. Heres what I have in the main activity public void onSharedPreferenceChanged(SharedPreferences prefs, String key) {

问题 I have a list with corresponding checkboxes, I would like to save the state of them so I can load the list of checked item when the app runs. How would I do this? My onRetain looks like: public Object onRetainNonConfigurationInstance() { return planets; } With planets being the entire list. I have read up on SharedPreferences but I can't seem to get it working :( 回答1: database::: Table name : state_checkBox Fields position : int state : boolean for code refer this links.. Video example Code

问题 I have a list with corresponding checkboxes, I would like to save the state of them so I can load the list of checked item when the app runs. How would I do this? My onRetain looks like: public Object onRetainNonConfigurationInstance() { return planets; } With planets being the entire list. I have read up on SharedPreferences but I can't seem to get it working :( 回答1: database::: Table name : state_checkBox Fields position : int state : boolean for code refer this links.. Video example Code

问题 I have an Activity which when clicking the menu and a button appearing there, goes to a PreferenceActivity , and then loads three ListPreferences . The ListPreference lets the user choose several values to update a remote DB, and I would like that to save those values when the application goes paused for example. As the ListPreference are in the PreferenceActivity , how can I get those values? Where should I save the current preferences state, in the Activity or in the PreferenceActivity ?

问题 I am developing an Android app where the user has the facility of Facebook sharing. I have the login details of the user for the Facebook, now what I am trying to do is these login details should be saved until the application is not deleted. When I tried to find the answer for this, I got some answers stating about shared preferences. But I am not cleared exactly how it works. Here is what I am trying to do, Username = username.getText().toString(); PassWord = password.getText().toString();

问题 I am trying to change colors of some text and MainActivity from a menu. I have two menus, white color and black color, if I click white will return the color of background white, buttons black, text black. When I click black will return the color of background grey, buttons white, text, white. I am trying this to save with SharedPreferences but it is not working always it takes the grey color. If I do this without SharedPreferences and click on the PopUpMenu it changes the color, but with