我在共享首选项类中存储了一个字符串,并希望在另一个片段中使用该字符串。
我想我在上下文,应用程序上下文上做了一些错误的事情。我不知道上下文的事情。每当我打开我的个人资料片段,应用程序就会崩溃。
共享首选项类
public class SharedPrefs {
private static final String myPrefs = "myprefs";
private static final String LogedInKey = "Key";
private final Context context;
private final SharedPreferences sharedPreferences;
private final SharedPreferences.Editor editor;
public SharedPrefs(Context context) {
this.context = context;
sharedPreferences = context.getSharedPreferences(myPrefs, Context.MODE_PRIVATE);
editor = sharedPreferences.edit();
}
public void savePref(String key) {
editor.putString(LogedInKey, key);
editor.commit();
}
public String getLogedInKey() {
return sharedPreferences.getString(LogedInKey, null);
}
public void clearLogin() {
editor.putString(LogedInKey, null);
editor.commit();
}}
我的个人资料片段:
public class ProfileFragment extends Fragment {
private Context context;
private SharedPrefs sharedPrefs=new SharedPrefs(context);
public ProfileFragment(Context context) {
this.context = context;
}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.fragment_profile, null);
TextView userName=view.findViewById(R.id.userName);
String a=sharedPrefs.getLogedInKey();
userName.setText(a);
return view;
}
@Override
public void onViewCreated(@NonNull View view, @Nullable Bundle savedInstanceState) {
super.onViewCreated(view, savedInstanceState);
}}
我只想将字符串设置为共享引用中的TextView。
https://stackoverflow.com/questions/56763573
复制相似问题