android - 如何访问 SherlockFragment 中的共享首选项

Question

我在选项卡中使用 sherlock fragment ，但我无法访问 sharedpreference 或保存它，我该怎么办？这是我的代码:

 public class SettingsActivity extends SherlockFragment  {

    private CheckBox cb1;
    private Context context = getActivity();
    private SharedPreferences sp;

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
        View rootView = inflater.inflate(R.layout.settings_layout, container, false);
        cb1 = (CheckBox)rootView.findViewById(R.id.cb1);
        sp = PreferenceManager.getDefaultSharedPreferences(getActivity());
        cb1.setOnCheckedChangeListener(new OnCheckedChangeListener() {
            public void onCheckedChanged (CompoundButton cb, boolean isChecked) {
                if (isChecked) {
                    context.getSharedPreferences("some_pref", Context.MODE_PRIVATE)
                    .edit()
                    .putBoolean("some_bool_name", true)
                    .commit();
                }
            }
        });
        return rootView;
    }
}

如果上述方法不正确，请告诉我如何保存首选项。

LogCat

11-13 18:13:36.907: I/ActivityManager(10626): START u0 {act=android.intent.action.MAIN cat=[android.intent.category.LAUNCHER] flg=0x10200000 cmp=com.myapp.test/.MainActivity} from pid 10836 11-13 18:13:36.907: D/ActivityManager(10626): TopActivityInfo, pkgName: com.myapp.test activityName: com.myapp.test.MainActivity bstSpecialAppKeyboardHandlingEnabled = false 11-13 18:13:36.907: D/GuidanceScreen(10824): appName: My App, currentPkg: com.myapp.test, event: app_launch, controller: Keyboard 11-13 18:13:36.907: D/ActivityManager(10626): Showing guidance for pkgName: com.myapp.test 11-13 18:13:36.917: D/GuidanceScreen(10824): appName: My App 11-13 18:13:36.987: D/GuidanceScreen(10824): no guidance for com.myapp.test. 11-13 18:13:37.037: D/WindowManager(10626): Sending appClickStats request with data: [package=com.myapp.test, appname=My App, appver=1.0, clickloc=system_server] 11-13 18:13:37.237: I/ActivityManager(10626): Displayed com.myapp.test/.MainActivity: +260ms 11-13 18:13:46.227: D/AndroidRuntime(15464): procName from cmdline: com.myapp.test 11-13 18:13:46.227: E/AndroidRuntime(15464): in writeCrashedAppName, pkgName :com.myapp.test 11-13 18:13:46.227: D/AndroidRuntime(15464): file written successfully with content: com.myapp.test StringBuffer : ;com.myapp.test 11-13 18:13:46.237: E/AndroidRuntime(15464): Process: com.myapp.test, PID: 15464 11-13 18:13:46.237: E/AndroidRuntime(15464): at com.myapp.test.SettingsActivity.onCreateView(SettingsActivity.java:40) 11-13 18:13:46.267: I/ActivityManager(10626): Process com.myapp.test (pid 15464) has died. 11-13 18:13:46.267: W/ActivityManager(10626): Force removing ActivityRecord{4b12da0c u0 com.myapp.test/.MainActivity t17}: app died, no saved state 11-13 18:13:46.287: I/WindowState(10626): WIN DEATH: Window{4b1ac890 u0 com.myapp.test/com.myapp.test.MainActivity}

Answer 1

初始化共享首选项:

private SharedPreferences loginPreferences;
private SharedPreferences.Editor loginPrefsEditor;

在 onCreateView() 内部:

loginPreferences = getActivity().getSharedPreferences("loginPrefs", getActivity().MODE_PRIVATE);
loginPrefsEditor = loginPreferences.edit();

保存:

loginPrefsEditor.putString("start_time", yourText);
loginPrefsEditor.commit();

检索:

String dateString = loginPreferences.getString("start_time", "");