Android thread handler NullPointerException
- by Realn0whereman
So this null pointer is confusing me. I believe it is a scope issue.
My main activity looks like this:
public class App extends Activity {
ProgressDialog progressDialog;
ProgressThread progressThread;
Then inside of the oncreate I do this:
ProgressDialog progressDialog = new ProgressDialog(this);
progressDialog.setProgressStyle(ProgressDialog.STYLE_SPINNER);
progressDialog.setMessage("Fetching Images...");
ProgressThread progressThread = new ProgressThread(handler,mImageIds,mImages);
progressThread.start();
progressDialog.show();
THEN inside progressThread which is a separate class I do
mHandler.sendMessage(mHandler.obtainMessage());
Now up until this point i believe it behaves as it should. I have my handler hanging out in class scope right underneath my oncreate
final Handler handler = new Handler() {
public void handleMessage(Message msg){
progressDialog.hide();
progressThread.interrupt();
}
};
The program thinks that progressDialog and progressThread are declared, but are null. Why would they be null if I instantiate in my oncreate.
