Android Example

Quiz Example From T2J Program

The T2J program has a pretty good example of an app that will circulate through an array of questions and can collect the answers for whatever use you can come up with. It can be adapted to get questions from the Internet, a File or as it does in the example from resources. It doesn't do anything with the answers in this example but it could store them in a data base or send them to the Internet for tabulation as part of some bigger scheme. It does single and multiple line EditText answers and multiple choice RadioButton answers from which you can also make True/False answers.

Screen Dumps

After you are done looking at the Java code you might like to download the program and let it make the example. You can see the rest of the code, export it to an Eclipse project and see it run. I called it App2 here but you can call it anything you want.

Check it out!

App2.java

package com.bandpsoftware.app2;

import android.app.Activity;
import android.app.AlertDialog;
import android.content.DialogInterface;
import android.content.Intent;
import android.content.Context;
import android.content.DialogInterface.OnClickListener;
import android.os.Bundle;
import android.os.Handler;
import android.os.Message;
import android.widget.Toast;

public class App2 extends Activity {
    //These are just a few global variables and constants
    private static final int SHOW_QUIZ = 1;
    String[] qs = null;
    int qPointer = 0;
    private AlertDialog.Builder alert;
    Context mContext = null;

    @Override
    public void onCreate(Bundle icicle) {
        //The onCreate sets up the alert box that asks whether the user wants to 
        //quit or not. It also loads the questions from resources. It could get
        //the questions from anywhere, like the internet or a file.
        super.onCreate(icicle);
        setContentView(R.layout.main);
        mContext = this;
        qs = getResources().getStringArray(R.array.qanda);
        alert = new AlertDialog.Builder(this);
        alert.setIcon(android.R.drawable.ic_dialog_alert);
        alert.setPositiveButton(\"Go On\", new OnClickListener() {
            @Override
            public void onClick(DialogInterface dialog, int which) {
                //Restart if user chooses Go On button
                Intent in = new Intent(mContext, Quiz.class);
                in.putExtra(\"question\",qs[qPointer]);
                startActivityForResult(in, SHOW_QUIZ);
                }//onclick
            });//setPostiveButton
        alert.setNegativeButton(\"Quit \", new OnClickListener() {
            @Override
            public void onClick(DialogInterface dialog, int which) {
                //Quit if user chooses stop button
                finish();
                }//onclick
            });//setPostiveButton 

        }//oncreate

    @Override
    protected void onStart() {
        //This gives the main activity time to draw its screen before
        //the first question is displayed in the dialog screen
        super.onStart();
          Message m = startHandler.obtainMessage();
        startHandler.sendMessage(m);
        }//onstart
   
    @Override
    public void onActivityResult(int requestCode, int resultCode, Intent data) {
        super.onActivityResult(requestCode, resultCode, data);
        if (requestCode == SHOW_QUIZ)
            if (resultCode == Activity.RESULT_OK) {
                String s = data.getStringExtra(\"button\");
                if (s.equalsIgnoreCase(\"next\")) {
                    //Next question if user chooses Next button
                    qPointer++;
                    if (qPointer == qs.length) qPointer = 0;
                    Intent in = new Intent(mContext, Quiz.class);
                    in.putExtra(\"question\",qs[qPointer]);
                    startActivityForResult(in, SHOW_QUIZ);
                    s = data.getStringExtra(\"results\");
                    Toast.makeText(this,\"Answer: \"+s, Toast.LENGTH_SHORT).show();
                    }//next
                    else {
                        //Back to previous question if user presses the Back button
                        qPointer--;
                        if (qPointer < 0) qPointer = qs.length;
                        Intent in = new Intent(mContext, Quiz.class);
                        in.putExtra(\"question\",qs[qPointer]);
                        startActivityForResult(in, SHOW_QUIZ);
                        Toast.makeText(this,\"Back\", Toast.LENGTH_SHORT).show();
                        }//back
                
                }//if result_ok
                else {
                    //User has chosen Stop button. Ask if they want to quit.
                    alert.setTitle(\"Surveyor\");
                    alert.setMessage(\"Do You Want To Quit?\");
                    alert.show();
                    }//not ok
        }//onactivityresult

    Handler startHandler = new Handler() {
        //This calls the first question or where ever the qPointer is
        public void handleMessage(Message msg) {
            Intent in = new Intent(mContext, Quiz.class);
            in.putExtra(\"question\",qs[qPointer]);
            startActivityForResult(in, SHOW_QUIZ);
            }//handlemessge
        };//handler   
    
//TODO: Fill In Methods Etc.
}//class