get applicationContext in TextView.setText()

Question

I'm building a TextView subclass to change the text that is inserted in the android:text. For instance, I want to capitalize the whole text but, to make sure that it is needed, I need to access the Application instance (I have a boolean that tells if it must or not be capitalized).

I implemented this subclass:

public class UpperTextView extends TextView {

private Context context;

public UpperTextView(Context context) {
    super(context);
    this.context = context;
}

public UpperTextView(Context context, AttributeSet attrs, int defStyle) {
    super(context, attrs, defStyle);
    this.context = context;
}

public UpperTextView(Context context, AttributeSet attrs) {
    super(context, attrs);
    this.context = context;
}

@Override
public void setText(CharSequence text, BufferType type) {
    //I get a NullPointerException here since var context is null
    Context applicationContext = context.getApplicationContext();

    if (text != null && applicationContext instanceof MyApplication && applicationContext.doUppercase()) {

        MyApplication myApp = (MyApplication) applicationContext;
        myApp.getLanguagesController().getLocalizedString(text.toString().toUpperCase());
    }
    super.setText(text, type);
}
}

In the layout, I have it declared like this

            <my.package.UpperTextView
            android:id="@+id/foo"
            android:text="bar"/>

I get a NullPointerException when invoking context.getApplicationContext().

Did anyone already came across this?

you don't need to keep track of the context, you can call getContext from within a View — njzk2, Apr 18 '13 at 15:23

score 1 · Accepted Answer · answered Apr 18 '13 at 15:28

1

I think you should try this :

this.getContext().getApplicationContext()

This should not return you null pointer exception.

answered Apr 18 '13 at 15:28

Tahir Mehmood

71
5

score 0 · Answer 2 · edited May 23 '17 at 11:43

0

Check the link below to know when to use getApplicationContext() and when to use Activity Context

When to call activity context OR application context?

Most of the times it is better to use Activity context

edited May 23 '17 at 11:43

Community

1
1

answered Apr 18 '13 at 15:21

Raghunandan

132,755
26
225
256

score 0 · Answer 3 · answered Apr 18 '13 at 15:23

0

It's incorrect way for localization. Check below link: http://developer.android.com/guide/topics/resources/localization.html

answered Apr 18 '13 at 15:23

Nickolai Astashonok

2,878
3
20
23

Thing is, transalations are provided by the server... Therefore I cannot use the resources folders for it – Miguel Ribeiro Sep 05 '13 at 11:05

get applicationContext in TextView.setText()

3 Answers3