Question

I have the following code in my onCreate-method:

public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.main);
    final ImageView field1 = (ImageView) findViewById(R.id.field1);
    field1.setBackgroundResource(R.drawable.field0);

How can I set the BackgroundResource in any other method like this:

public void setBackground() {
    field1.setBackgroundResource(R.drawable.field2);
}

It says, that field1 cannot be resolved to a variable…

Answer 1

set field1 to global of the class, as follows:

ImageView field1=null;
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.main);
    field1 = (ImageView) findViewById(R.id.field1);
    field1.setBackgroundResource(R.drawable.field0);

}


public void setBackground() {
    field1.setBackgroundResource(R.drawable.field2);
}