Question

import android.content.Context;
import android.content.SharedPreferences;
import android.net.Uri;

public class LoadSettings 
{
public static void LoadMySettings   (Context ctx)
{
SharedPreferences sharedPreferences = ctx.getSharedPreferences("MY_SHARED_PREF", 0);
String strSavedMem1 = sharedPreferences.getString("gSendTo", "");
String strSavedMem2 = sharedPreferences.getString("gInsertInto", "");
String cCalId = sharedPreferences.getString("gCalID", "");

setInsertIntoStr(strSavedMem2);
setSendToStr(strSavedMem1);
}

private static String cSendToStr;
private static String cInsertIntoStr;
private int cCalId;
private Uri cCalendars;

public String getSendToStr()
{
    return this.cSendToStr;
}
public static void setSendToStr(String pSendToStr)
{
    cSendToStr = pSendToStr;
}
public String getInsertIntoStr()
{
return this.cInsertIntoStr;
}

public static void setInsertIntoStr(String pInsertIntoStr)
{
cInsertIntoStr = pInsertIntoStr;
}

}

from the calling class i have tryed lots the current is.

LoadSettings.LoadMySettings(this);

but when i try to get some data for example.

textSavedMem1.setText(LoadSettings.getSendToStr());

i get a Null error.

Answer 1

LoadMySettings is not a class but a method (so it should start with a lower case, if you follow Oracle/Sun’s naming conventions for the Java language).

You access it indeed by calling LoadSettings.loadMySettings(someContext), where someContext is the context to pass around. In your example, we don’t know what this refers to, so maybe your error lies there.

---

Then when you do this: textSavedMem1.setText(LoadSettings.getSendToStr());

You call a non-static method, so that should be either using an instance of LoadSettings or, more likely considering your code, you could change getSendToStr to be:

    public static String getSendToStr()
    {
        return cSendToStr;
    }

Though that seems to be rather bad design.

Maybe if you tell us more about what you try to do, we can help more, as as such our answers will just take you one step further.

---

EDIT: Ok, I just figured out what you are trying to do…

You need to go back and learn basic Java concepts and read on access modifiers, and constructors first, and OO semantics in Java in general.

Change your class to this:

public class LoadSettings 
{
    public LoadSettings(Context ctx)
    {
        SharedPreferences sharedPreferences =
            ctx.getSharedPreferences("MY_SHARED_PREF", 0);
        String strSavedMem1 = sharedPreferences.getString("gSendTo", "");
        String strSavedMem2 = sharedPreferences.getString("gInsertInto", "");
        String cCalId = sharedPreferences.getString("gCalID", "");

        setInsertIntoStr(strSavedMem2);
        setSendToStr(strSavedMem1);
    }

    private String cSendToStr;
    private String cInsertIntoStr;
    private int cCalId;
    private Uri cCalendars;

    public String getSendToStr()
    {
       return cSendToStr;
    }

    public void setSendToStr(String pSendToStr)
    {
        cSendToStr = pSendToStr;
    }

    public String getInsertIntoStr()
    {
        return cInsertIntoStr;
    }

    public void setInsertIntoStr(String pInsertIntoStr)
    {
        cInsertIntoStr = pInsertIntoStr;
    }

}

And create a new instance of LoadSettings with:

LoadSettings mySettings = new LoadSettings(someContext);

You can then correctly invoke:

textSavedMem1.setText(mySettings.getSendToStr());