hej!

I wonder if somebody can help me with my littel probelm?
it's that when I run the first ToDo List in chapter 4 it will not work and just shutdown the program.

please do somebody know how to fix this problem?

You need to double check all your methods and variables.
Since you did not post your code it is not possible to see
where the actual error is.

I have double check all my methods and variables. but I can't find something wrong whit it.
the code:


package com.paad.todolisttest;

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 Todolisttest 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);

final ArrayList<String> todoItems = new ArrayList<String>();
int resID = R.layout.todolist_item;
final ArrayAdapter<String> aa = new ArrayAdapter<String>(this, resID,
todoItems);
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;
}
});
}
}

code 2:


package com.paad.todolisttest;

import android.content.Context;
import android.content.res.Resources;
import android.graphics.Canvas;
import android.graphics.Paint;
import android.util.AttributeSet;
import android.widget.TextView;

public class TodolisttestActivity extends TextView {

private Paint marginPaint;
private Paint linePaint;
private int paperColor;
private float margin;

public TodolisttestActivity (Context context, AttributeSet ats, int ds) {
super(context, ats, ds);
init();
}

public TodolisttestActivity (Context context) {
super(context);
init();
}

public TodolisttestActivity (Context context, AttributeSet attrs) {
super(context, attrs);
init();
}

private void init() {
// Get a reference to our resource table.
Resources myResources = getResources();

// Create the paint brushes we will use in the onDraw method.
marginPaint = new Paint(Paint.ANTI_ALIAS_FLAG);
marginPaint.setColor(myResources.getColor(R.color. notepad_margin));
linePaint = new Paint(Paint.ANTI_ALIAS_FLAG);
linePaint.setColor(myResources.getColor(R.color.no tepad_lines));

// Get the paper background color and the margin width.
paperColor = myResources.getColor(R.color.notepad_paper);
margin = myResources.getDimension(R.dimen.notepad_margin);
}

@Override
public void onDraw(Canvas canvas) {
// Color as paper
canvas.drawColor(paperColor);

// Draw ruled lines
canvas.drawLine(0, 0, getMeasuredHeight(), 0, linePaint);
canvas.drawLine(0, getMeasuredHeight(),
getMeasuredWidth(), getMeasuredHeight(),
linePaint);

// Draw margin
canvas.drawLine(margin, 0, margin, getMeasuredHeight(), marginPaint);

// Move the text across from the margin
canvas.save();
canvas.translate(margin, 0);

// Use the TextView to render the text.
super.onDraw(canvas);
canvas.restore();
}

}

code layout xml main:

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="fill_parent"
android:layout_height="fill_parent">
<EditText
android:id="@+id/myEditText"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text="New To Do Item"
/>
<ListView
android:id="@+id/myListView"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
/>
</LinearLayout>

code layout xml todolist_item:

<?xml version="1.0" encoding="utf-8"?>
<com.paad.todolist.TodoListItemView
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:padding="10dp"
android:scrollbars="vertical"
android:textColor="@color/notepad_text"
android:fadingEdge="vertical"
/>

code values xml colors:

<?xml version="1.0" encoding="utf-8"?>
<resources>
<color name="notepad_paper">#AAFFFF99</color>
<color name="notepad_lines">#FF0000FF</color>
<color name="notepad_margin">#90FF0000</color>
<color name="notepad_text">#AA0000FF</color>
</resources>

code values xml dimens:

<?xml version="1.0" encoding="utf-8"?>
<resources>
<dimen name="notepad_margin">30dp</dimen>
</resources>

code values xml strings:

<?xml version="1.0" encoding="utf-8"?>
<resources>
<string name="hello">Hello World, TodoList!</string>
<string name="app_name">Chapter 4 To-do List</string>
<string name="add_new">Add New Item</string>
<string name="remove">Remove Item</string>
<string name="cancel">Cancel</string>
</resources>

code values xml styles:

<?xml version="1.0" encoding="utf-8"?>
<resources>
<style name="ToDoTheme" parent="@android:style/Theme.Black">
<item name="android:textSize">12sp</item>
</style>
</resources>