Question

The setText() method returns null in my application why?

public class GetValue extends Activity {
    char letter = 'g';
    int ascii = letter;

    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);

        TextView textView = (TextView)findViewById(R.id.txt_1);
            textView.setText(ascii);
    }
}

It doesn’t matter what text i put in, it crashes anyway. Why does setText() keep returning null?

Thank you, in advance

Solution: My error was in the xml file. I wrote:
android:text=”@+id/txt_1″
When it should say:
android:id=”@+id/txt_1″

Thanks a lot for all the answers and comments!

Answer 1

You tried to pass an integer as parameter to setText, which assumes it is a resource ID. To display computed text, pass it as a string: textView.setText("g");

Edited: Check your XML file, I have test with something very basic and it works

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent">
    <TextView
        android:id="@+id/txt_1"
        android:layout_width="fill_parent" 
        android:layout_height="wrap_content" 
        android:text="myTextView"/>
</LinearLayout>

Maybe try to clean your project (Project->Clean in Eclipse), I recently have some trouble with R generation on the last ADT version.