nested class madness

[bob]

Can someone explain why I get this error?

ProgressThread cannot be resolved to a type

Here's the code:

package com.coolfone.notetest;

import android.app.Activity;
import android.app.Dialog;
import android.app.ProgressDialog;
import android.os.Bundle;
import android.os.Handler;
import android.os.Message;
import android.util.Log;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;

public class NotificationTestActivity extends Activity {

static final int PROGRESS_DIALOG = 0;
Button button;
ProgressThread progressThread;
ProgressDialog progressDialog;

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

// Setup the button that starts the progress dialog
button = (Button) findViewById(R.id.progressDialog);
button.setOnClickListener(new OnClickListener(){
public void onClick(View v) {
showDialog(PROGRESS_DIALOG);
}
});
}

protected Dialog onCreateDialog(int id) {
switch(id) {
case PROGRESS_DIALOG:
progressDialog = new
ProgressDialog(NotificationTestActivity.this);

progressDialog.setProgressStyle(ProgressDialog.STYLE_HORIZONTAL);
progressDialog.setMessage("Loading...");
return progressDialog;
default:
return null;
}
}

@Override
protected void onPrepareDialog(int id, Dialog dialog) {
switch(id) {
case PROGRESS_DIALOG:
progressDialog.setProgress(0);
progressThread = new ProgressThread(handler);
progressThread.start();
}

// Define the Handler that receives messages from the thread and
update the progress
final Handler handler = new Handler() {
public void handleMessage(Message msg) {
int total = msg.arg1;
progressDialog.setProgress(total);
if (total >= 100){
dismissDialog(PROGRESS_DIALOG);
progressThread.setState(ProgressThread.STATE_DONE);
}
}
};

/** Nested class that performs progress calculations (counting) */
final class ProgressThread extends Thread {
Handler mHandler;
final static int STATE_DONE = 0;
final static int STATE_RUNNING = 1;
int mState;
int total;

ProgressThread(Handler h) {
mHandler = h;
}

public void run() {
mState = STATE_RUNNING;
total = 0;
while (mState == STATE_RUNNING) {
try {
Thread.sleep(100);
} catch (InterruptedException e) {
Log.e("ERROR", "Thread Interrupted");
}
Message msg = mHandler.obtainMessage();
msg.arg1 = total;
mHandler.sendMessage(msg);
total++;
}
}

/* sets the current state for the thread,
* used to stop the thread */
public void setState(int state) {
mState = state;
}
}

}
}

 

[Steven Simpson]

Can someone explain why I get this error?

ProgressThread cannot be resolved to a type

You should indicate where the error appears too.

@Override
protected void onPrepareDialog(int id, Dialog dialog) {
switch(id) {
case PROGRESS_DIALOG:
progressDialog.setProgress(0);
progressThread = new ProgressThread(handler);
progressThread.start();
}

This looks like the whole of onPrepareDialog, but it's missing a brace.
Reformat the entire file, and you'll see that ProgressThread is nested
within this function, and is not a direct member of the enclosing class.

 

[Roedy Green]

Can someone explain why I get this error?

What you need is a fundamental understanding of the various types of
nested classes. see http://mindprod.com/jgloss/nestedclasses.html
http://mindprod.com/jgloss/innerclasses.html
http://mindprod.com/jgloss/anonymousclasses.html
--
Roedy Green Canadian Mind Products
http://mindprod.com
It's difficult to be rigorous about whether a machine really knows,
thinks, etc., because we’re hard put to define these things.
We understand human mental processes only slightly better than
a fish understands swimming.
~ John McCarthy (born: 1927-09-04 died: 2011-10-23 at age: 84).
Inventor of the term AI (Artificial Intelligence),
the short-circuit OR operator (|| in Java),
and LISP (LIst Processing Language) that makes EMACS
(Extensible MACro System) so addictive.

 

[bob]

You should indicate where the error appears too.


This looks like the whole of onPrepareDialog, but it's missing a brace.  
Reformat the entire file, and you'll see that ProgressThread is nested
within this function, and is not a direct member of the enclosing class.

You're right.

This is where I got the code from:

http://developer.android.com/guide/topics/ui/dialogs.html

Looks like Google goofed.

 

[Roedy Green]

This looks like the whole of onPrepareDialog, but it's missing a brace

IDEs are good at this. See http://mindprod.com/jgloss/ide.html

For really intractable cases, use the BraceBalancer. See
http://mindprod.com/products1.html#BRACEBALANCER
--
Roedy Green Canadian Mind Products
http://mindprod.com
It's difficult to be rigorous about whether a machine really knows,
thinks, etc., because we’re hard put to define these things.
We understand human mental processes only slightly better than
a fish understands swimming.
~ John McCarthy (born: 1927-09-04 died: 2011-10-23 at age: 84).
Inventor of the term AI (Artificial Intelligence),
the short-circuit OR operator (|| in Java),
and LISP (LIst Processing Language) that makes EMACS
(Extensible MACro System) so addictive.