Force Close error with CH.2 ToDo List App

McRae · July 16th, 2011, 03:54 PM

Could you post your ToDoList activity as well? Thanks.

mjafarin · July 19th, 2011, 03:27 PM

@McRae

Code:

package com.paad.todolist;

import java.util.ArrayList;
import android.app.Activity;
import android.os.Bundle;
import android.view.KeyEvent;
import android.view.View;
import android.view.View.OnKeyListener;
import android.widget.ArrayAdapter;
import android.widget.EditText;
import android.widget.ListView;

public class ToDoList extends Activity {

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

    // Inflate your view
    setContentView(R.layout.main);
      
    // Get references to UI widgets
    ListView myListView = (ListView)findViewById(R.id.myListView);
    final EditText myEditText = (EditText)findViewById(R.id.myEditText);
    
    // Create the array list of to do items
    final ArrayList<String> todoItems = new ArrayList<String>();
    // Create the array adapter to bind the array to the listview
    int resID = R.layout.todolist_item;
    final ArrayAdapter<String> aa = new ArrayAdapter<String>(this,resID,todoItems);
    // Bind the array adapter to the listview.
    myListView.setAdapter(aa);
    
    myEditText.setOnKeyListener(new OnKeyListener() {
        public boolean onKey(View v, int keyCode, KeyEvent event) {
          if (event.getAction() == KeyEvent.ACTION_DOWN)
            if (keyCode == KeyEvent.KEYCODE_DPAD_CENTER)
            {
              todoItems.add(0, myEditText.getText().toString());
              aa.notifyDataSetChanged();
              myEditText.setText("");
              return true;
            }
          return false;
        }
      });
  }
}

McRae · July 21st, 2011, 08:28 PM

That seems to be in order. Have you tried just downloading the code and running it?

mjafarin · July 22nd, 2011, 03:21 PM

@McRae: I have done that too, but no success. I use eclipse and the android emulator it creates. Could that be the problem? Could it be related to the memory usage?
The error I see every time is Android app crashed unexpectedly. Force close.

I appreciate any suggestion you may have. Thanks.

salientknight · September 9th, 2011, 10:55 PM

Has anyone fixed this? I went through the same steps and am getting the same problem.
I wound up coping and pasting the code from the book too....

I worry that it may be because I only have options for 2.1-update and higher for my project and there is nothing else available for down load. If this code wont work on 2.2 and 2.3 however its not very useful.

Anyone solve this problem?

-=Daniel=-

Quote:

Originally Posted by Spiffy

Hello everyone! I'm having a problem running the ToDo List app from chapter 2. I figured out that extra imports were needed, so I downloaded the code examples from the website and was eventually able to get my code to compile and then execute on the emulator. But as soon as it does, I get the "Sorry! The Application ToDo List (process com.todo.list) has stopped unexpectedly. Please try again." And then my only option is to force close.

I've tried running it several times, and then even resorted to copying and pasting the code from the example into my project to see if I had just made some error somewhere, but the result doesn't change. Here is the code in my source file:

Code:

package com.todo.list;

import java.util.ArrayList;
import android.app.Activity;
import android.os.Bundle;
import android.view.KeyEvent;
import android.view.View;
import android.view.View.OnKeyListener;
import android.widget.ArrayAdapter;
import android.widget.EditText;
import android.widget.ListView;

public class todoList extends Activity {
	 /** Called when the activity is first created. */
	  public void onCreate(Bundle savedInstanceState) {
	    super.onCreate(savedInstanceState);

	    // Inflate your view
	    setContentView(R.layout.main);
	      
	    // Get references to UI widgets
	    final ListView myListView = (ListView)findViewById(R.id.myListView);
	    final EditText myEditText = (EditText)findViewById(R.id.myEditText);
	    
	    // Create the array list of to do items
	    final ArrayList<String> todoItems = new ArrayList<String>();
	    // Create the array adapter to bind the array to the listview
	    final ArrayAdapter<String> aa;
	    aa = new ArrayAdapter<String>(this,
	                                  android.R.layout.simple_list_item_1,
	                                  todoItems);
	    // Bind the array adapter to the listview.
	    myListView.setAdapter(aa);
	    
	    myEditText.setOnKeyListener(new OnKeyListener() {
	        public boolean onKey(View v, int keyCode, KeyEvent event) {
	          if (event.getAction() == KeyEvent.ACTION_DOWN)
	            if (keyCode == KeyEvent.KEYCODE_DPAD_CENTER)
	            {
	              todoItems.add(0, myEditText.getText().toString());
	              aa.notifyDataSetChanged();
	              myEditText.setText("");
	              return true;
	            }
	          return false;
	        }
	      });
	  }
	}

I have tried creating the project over again and setting the minimum SDK version to 5, but still nothing changed. Does anyone have an idea as to why this error is occurring? Thank you for your time! :)

EDIT: I just completed the Chapter 4 compass example, and I got the same error when trying to run it. This leads me to believe it MUST be something I'm doing, probably in setting up my projects, but what could it be?