getResources does not work / undefined Java

I have a problem with caling the getResources() function in an standard class. All imports must be there to use the function. Is there any special class I need to extend my class?

Thanks for the immediate help.开发者_StackOverflow社区

package com.example.helloandroid;

import android.app.Activity;
import android.content.ContentValues;
import android.content.Context;
import android.content.ContextWrapper;

import android.content.res.Resources;

import android.content.Intent;
import android.os.Bundle;

//import android.content.res.Resources;
import android.database.Cursor;
import android.database.SQLException;
import android.database.sqlite.SQLiteDatabase;
import android.database.sqlite.SQLiteOpenHelper;
import android.util.Log;


public class DbAdapter {

    public DbAdapter() {
     Resources res = getResources();//error: The method getResources() is undefined for the type DbAdapter
            //also tyed context.getResources()
    }


}

getResouces is a method of a Context. So you can pass the context to your DbAdapter constructor and call getResources from it :

public DbAdapter(Context context) {
     Resources res = context.getResources();//error: The method getResources() is undefined for the type DbAdapter
            //also tied context.getResources()
}

If your Adapter is for example an ArrayAdapter, you can use this:

getContext().getResources();

Define Context's object and then call all the R.<Methods> with the help of context object .

Eg:

Context ctx;
ctx.getResources().getString(R.string.Forgot_message);

Above code is working for me .