I am using this SharedPref Class for saving and retrieving value from it. Here I created setTextSize & getTextSize methods.
SharedPref.java
public class SharedPref {
SharedPreferences mySharedPref;
float aFloat = 18.0f;
// this method will save the text size
public void setTextSize(float tSize) {
SharedPreferences.Editor editor = mySharedPref.edit();
editor.putFloat("TextSize",tSize);
editor.apply();
}
// this method will get the text size
public float getTextSize (){
return mySharedPref.getFloat("TextSize",aFloat);
}
}
Now I want to call getTextSize method in RecyclerView Adapter for set text size.
NameAdapter.java
public class NameAdapter extends RecyclerView.Adapter<NameAdapter.NameViewHolder> implements Filterable {
Context context;
List<NameModel> nameItemList;
public NameAdapter(@NonNull Context context, List<NameModel> nameItemList) {
this.context = context;
this.nameItemList = nameItemList;
}
@NonNull
@Override
public NameViewHolder onCreateViewHolder(@NonNull ViewGroup parent, int viewType) {
View view = LayoutInflater.from(parent.getContext()).inflate(R.layout.name_item,parent, false );
return new NameViewHolder(view);
}
@Override
public void onBindViewHolder(@NonNull NameViewHolder holder, int position) {
holder.name.setText(nameItemList.get(position).getName());
holder.meaning.setText(nameItemList.get(position).getMeaning());
// here I want to use setTextSize method from SharedPref
holder.name.setTextSize(getTextSize);
}
@Override
public int getItemCount() {
return nameItemList.size();
}
public class NameViewHolder extends RecyclerView.ViewHolder{
TextView name,meaning;
public NameViewHolder(View itemView) {
super(itemView);
name = (TextView) itemView.findViewById(R.id.tvName);
meaning = (TextView) itemView.findViewById(R.id.tvMeaning);
}
}
}
Please help. Thanks in advance.
CodePudding user response:
You can pass values in constructor like this
Context context; List<NameModel> nameItemList; Float prepsValue; public NameAdapter(@NonNull Context context, List<NameModel> nameItemList,Float prepsValue) { this.context = context; this.nameItemList = nameItemList; this.prepsValue =prepsValue; }
CodePudding user response:
I'd suggest you create a separate class for the SharedPrefs communication that you can call statically, like:
public class Preferences {
public static void put( Context context, String key, boolean value ) {
PreferenceManager.getDefaultSharedPreferences( context ).edit().putBoolean( key, value ).apply();
}
public static void put( Context context, String key, int value ) {
PreferenceManager.getDefaultSharedPreferences( context ).edit().putInt( key, value ).apply();
}
public static void put( Context context, String key, long value ) {
PreferenceManager.getDefaultSharedPreferences( context ).edit().putLong( key, value ).apply();
}
public static void put( Context context, String key, float value ) {
PreferenceManager.getDefaultSharedPreferences( context ).edit().putFloat( key, value ).apply();
}
public static void put( Context context, String key, String value ) {
PreferenceManager.getDefaultSharedPreferences( context ).edit().putString( key, value ).apply();
}
public static String getString( Context context, String key ) {
return getString( context, key, "" );
}
public static String getString( Context context, String key, String fallback ) {
try {
return PreferenceManager.getDefaultSharedPreferences( context ).getString( key, fallback );
} catch( Exception ignored ) {
return fallback;
}
}
public static boolean getBoolean( Context context, String key, boolean fallback ) {
try {
return PreferenceManager.getDefaultSharedPreferences( context ).getBoolean( key, fallback );
} catch( Exception ignored ) {
return fallback;
}
}
public static int getInt( Context context, String key, int fallback ) {
try {
return PreferenceManager.getDefaultSharedPreferences( context ).getInt( key, fallback );
} catch( Exception ignored ) {
return fallback;
}
}
public static long getLong( Context context, String key, long fallback ) {
try {
return PreferenceManager.getDefaultSharedPreferences( context ).getLong( key, fallback );
} catch( Exception ignored ) {
return fallback;
}
}
public static float getFloat( Context context, String key, float fallback ) {
try {
return PreferenceManager.getDefaultSharedPreferences( context ).getFloat( key, fallback );
} catch( Exception ignored ) {
return fallback;
}
}
}
Then from your preferences activity do a
Preferences.put( getApplicationContext(), "TextSize", aFloat );
and since you keep the Context
in your RecyclerView
, get the TextSize
from anywhere like
holder.name.setTextSize( Preferences.getFloat( context, "TextSize", defaultValue );
CodePudding user response:
To get the value from the SharedPreferences
, you need context. As @Manjeet suggested, you can use the constructor. But, in the onBindViewHolder
, you get context from itemView.getContext()
. Then it will work