Problem generating the random numbers

Sorry, I thought you were using the onClick attribute in xml set to a method called onClick. My mistake. Could you please just post your entire code? It would help so everyone can get to the bottom of your issue a little bit faster. You can do that in a pastebin if it helps!

Go to http://pastebin.com/ and Submit the code, copy the link, and paste it back here!

I updated my original answer to work with the code you most likely have written.

Here it is!

package com.example.crystal.ball;

import java.util.Random;

import android.app.Activity; import android.os.Bundle; import android.view.Menu; import android.view.View; import android.widget.Button; import android.widget.TextView; import android.widget.Toast;

public class MainActivity extends Activity {

@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);

    //Declare our View variables and assign them the views from the layout file
    final TextView answerLabel = (TextView) findViewById(R.id.textView1);
    Button getAnswerButton = (Button) findViewById(R.id.button1);

    getAnswerButton.setOnClickListener(new View.OnClickListener() {

        public void onClick(View v) {
            // The button was clicked so, update the answer label with an answer.
            String answer = "";
            // Randomly Select one of three answers: Yes, No, Maybe.
            Random randomGenerator = new Random(); // Construct a new Random Generator
            int randomNumber = randomGenerator.nextInt(3);
            answer = Integer.toString(randomNumber);
            //Update the Label with our dynamic answer.
            answerLabel.setText(answer);
            Toast.makeText(getApplicationContext(), "Hello World", Toast.LENGTH_LONG).show();
        }
    });

}

@Override
public boolean onCreateOptionsMenu(Menu menu) {
    getMenuInflater().inflate(R.menu.activity_main, menu);
    return true;
}

}

Thanks! Please check my original answer for an edit on the Toast method I'd like you to try out.

Edit:

Or if it's easier just copy and paste this code and tell me what happens.

package com.example.crystal.balll;

import java.util.Random;

import android.app.Activity;
import android.os.Bundle;
import android.view.Menu;
import android.view.View;
import android.widget.Button;
import android.widget.TextView;



public class MainActivity extends Activity {

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        //Declare our View variables and assign them the views from the layout file
        final TextView answerLabel = (TextView) findViewById(R.id.textView1);
        Button getAnswerButton = (Button) findViewById(R.id.button1);

        getAnswerButton.setOnClickListener(new View.OnClickListener() {

            public void onClick(View v) {
                // The button was clicked so, update the answer label with an answer.
                String answer = "";
                Random randomGenerator = new Random(); 
                int randomNumber = randomGenerator.nextInt(3);
                answer = Integer.toString(randomNumber);
                //Update the Label with our dynamic answer.
                answerLabel.setText("Ernest was here");
                                Toast.makeText(getApplicationContext(), "Hello World", Toast.LENGTH_LONG).show();
            }
        });

    }

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        getMenuInflater().inflate(R.menu.activity_main, menu);
        return true;
    }
}

Another update:

I just implemented your code very quickly just to see if there was something obvious I was missing, but... nope! Your code worked fine, and I have a random number generator working fine on my emulator. Let me know if you are still having trouble. The last thing I can think of is that your project isn't being loaded onto your emulator or device. That's why if you use my code and don't see my name... then we have a problem!

Something must be wrong as you mentioned....I assume I should see "Ernest was here" :-), however, the app still returns 0.

Also, I am seeing a message in the console tab which says "ActivityManager: Warning: Activity not started, its current task has been brought to the front"...not sure what that means

My guess is that the app is simply not being loaded onto your device. Are you using an emulator or a physical device?

I am using an emulator (eclipse) I downloaded from the files associated with the Android courses on the treehouse website

Make sure you click/select your project in the left of eclipse (in the file tree/directory) and then press the "Green" play button.

EDIT:

Another option is to just right click the project folder on the left side of Eclipse, and go down to Run As... and select Android Project.

ok, I am getting a new message now...

[2013-07-03 00:06:34 - Crystal Balll] The connection to adb is down, and a severe error has occured. [2013-07-03 00:06:34 - Crystal Balll] You must restart adb and Eclipse. [2013-07-03 00:06:34 - Crystal Balll] Please ensure that adb is correctly located at 'E:\Android development\android_dev_environment_windows_64bit\android_dev_environment\android-sdk-windows\platform-tools\adb.exe' and can be executed.

Okay, well adb is the Android Device Bridge, and if it "goes down" then you basically lose your connection from Eclipse to your device/emulator. This doesn't happen to often anymore (especially when simply working with an emulator) but you should simply:

1. Open Task Manager (Windows: Ctrl + Shift + Esc)
2. Go to Processes
3. Find adb.exe and End Process
4. Then restart eclipse

still not working.....back to the previous message

This is a common "problem". Here are some solutions: http://stackoverflow.com/questions/4072706/the-connection-to-adb-is-down-and-a-severe-error-has-occured

If you really don't want to mess around with the command line or adb process, you can simply restart your computer.

ok, I will give that a try for now....I will get back to you if I need further help with this...thanks for helping me out.

Not a problem. You had "adb" running before, because you were able to get the app onto the emulator, but something went wrong somewhere. Heh. It happens. A restart may be the simplest solution. Good luck!

Hi Ernest, I tried restarting and still, the program returns 0....hehe, not sure what I am doing wrong here. However, I noticed a couple of messages in the logCat..... 1 - Not Late enabling check JNI (already on) 2 - Error opening trace file: No such file or directory! 3 - Emulator without GPU emulation detected

Next step... create a new Android Application project and put in a simple toast message (Like the one above) and see if you can run that one successfully.