“void is an invalid type for the variable buttonOK” - trying to close dialog after clicking button

Question

Some time ago i\'ve made a simple dialog. Everything looks fine, but i\'m meeting troubles after trying to close it. The error is \"void is an invalid type for the variab

Answer 1

Since you are trying to use the android:onClick attribute with "buttonOK", you must declare public void buttonOK(View v) {} as a regular method in your class. (Currently you are trying to nest it inside aboutApp(), also understand that you cannot nest methods in Java.)

public class MyActivity extends Activity {
    Dialog dialog;

    public void onCreate(Bundle savedInstanceState) { ... }

    public void aboutApp(View view) {
        // custom dialog
        dialog = new Dialog(context);
        ...
    }

    // Move your method here:
    public void buttonOK(View v) {
        dialog.dismiss();
    }
}

Answer 2

Your using dialogs incorrectly. Here's an example for you.

AlertDialog dialog = new AlertDialog.Builder(this).create();
dialog.setButton(DialogInterface.BUTTON_POSITIVE, "Ok", new DialogInterface.OnClickListener() {
    public void onClick(DialogInterface dialog, int which) {
        //TODO Handle click here

    }
});

dialog.show();

Answer 3

You have defined a method (buttonOK()) within another method (aboutApp()). This is not possible in Java. The compiler tries to make sense of this and supposes somhow that buttonOk is meant as a variable -- thus the misleading error message.