Solution 1 :
Just pass your context to the function and get the value from sharedpref
public static String getLan(Context cont) {
SharedPreferences settingPreferences=settingPreferences =cont.getSharedPreferences("setting", MODE_PRIVATE);
String[] language = getResources().getStringArray(R.array.setting_language_mode);
int posi =settingPreferences.getInt("language",0);
return language[pos];
}
Solution 2 :
I think you are doing well on
SharedPreferences language = getContext().getSharedPreferences("setting", MODE_PRIVATE);
But now if you want to get the data (language int in this case) you just have to do the following:
int lang_int = language.getInt("language",0);
Problem :
I created a shopping cart app, and it has a menu item. Then it has another activity called “SettingActivity”, for this settingActivity will have a TextView to show “Primary language, secondary language and both language”.
I got the SharedPreferences data in the SettingActivity. How can I pass those data to the MainAdapter?
Because when I click the secondary language in the SettingActivity, then the menu will change to secondary language or show both languages.
So, how can I get the SettingActivity’s SharedPreference data in the MainAdapter?
SettingActivity:
public class SettingActivity extends AppCompatActivity {
LinearLayout languageModeLinearLayout;
TextView languageModeTextView;
SharedPreferences settingPreferences;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_setting);
languageModeLinearLayout = findViewById(R.id.setting_language_mode_linearLayout);
languageModeTextView = findViewById(R.id.setting_language_mode_textView);
settingPreferences = getSharedPreferences("setting", MODE_PRIVATE);
updateUI();
languageModeLinearLayout.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
final String[] language = getResources().getStringArray(R.array.setting_language_mode);
AlertDialog.Builder languageMode = new AlertDialog.Builder(v.getContext());
languageMode.setTitle("Select Language Mode");
languageMode.setItems(language, new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int position) {
SharedPreferences.Editor editor = settingPreferences.edit();
editor.putInt("language", position);
editor.apply();
updateUI();
}
});
languageMode.create().show();
}
});
}
private String getLanguage(){
String[] language = getResources().getStringArray(R.array.setting_language_mode);
int position;
position = settingPreferences.getInt("language", 0);
return language[position];
}
private void updateUI(){
languageModeTextView.setText(getLanguage());
}
MainAdapter:
public class MainAdapter extends ArrayAdapter<MenuItem> implements Serializable {
private TextView mCartCounterTextView;
public MainAdapter(Context context, List<MenuItem> menuItems) {
super(context, 0, menuItems);
}
@NonNull
@Override
public View getView(int position, @Nullable View convertView, @NonNull ViewGroup parent) {
View itemView = convertView;
final ViewHolder viewHolder;
if (itemView == null) {
itemView = LayoutInflater.from(getContext()).inflate(R.layout.item_main, parent, false);
viewHolder = new ViewHolder(itemView);
itemView.setTag(viewHolder);
} else {
viewHolder = (ViewHolder) itemView.getTag();
}
final MenuItem currentMenuItem = getItem(position);
viewHolder.nameTextView.setText(currentMenuItem.getPrimaryName());
viewHolder.nameTextView.setText(currentMenuItem.getSecondaryName());
viewHolder.addToCartButton.setText(getFormattedPriceTextToButton(currentMenuItem));
viewHolder.addToCartButton.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
Main.getAddedItems().add(currentMenuItem);
Toast.makeText(v.getContext(), "Item had added to cart", Toast.LENGTH_SHORT).show();
mCartCounterTextView.setText(String.valueOf(Main.getAddedItems().size()));
mCartCounterTextView.setVisibility(View.VISIBLE);
}
});
return itemView;
}
private String getFormattedPriceTextToButton(MenuItem currentMenuItem) {
return "+ $" + currentMenuItem.getPrice();
}
private class ViewHolder {
TextView nameTextView;
TextView priceTextView;
Button addToCartButton;
public ViewHolder(View itemView) {
nameTextView = itemView.findViewById(R.id.main_name_textView);
priceTextView = itemView.findViewById(R.id.main_price_textView);
addToCartButton = itemView.findViewById(R.id.main_add_to_cart_button);
}
}
public void setData(TextView cartCounter){
mCartCounterTextView = cartCounter;
}
private void getSharedPreferencesLanguage(){
// SharedPreferences.Editor editor = getContext().getSharedPreferences("setting", MODE_PRIVATE).edit();
SharedPreferences language = getContext().getSharedPreferences("setting", MODE_PRIVATE);
}
MenuItem:
public class MenuItem {
private String mPrimaryName;
private String mSecondaryName;
private double mPrice;
public MenuItem(String primaryName, String secondaryName, double price){
mPrimaryName = primaryName;
mSecondaryName = secondaryName;
mPrice = price;
}
public String getPrimaryName(){
return mPrimaryName;
}
public String getSecondaryName(){
return mSecondaryName;
}
public double getPrice(){
return mPrice;
}