vidhu.0007
Lurker
Hi All,
I want to create my own Mylist_view by extending from ListView and implementing its methods. My code is not running properly.
The MyList class goes like this:
My Activity class goes like this:
The resources mylist_item.xml is below:
I tried debugging the above code. The "EditText" resource is loading properly. But when I click on the down arrow key, mylist_item is loaded, i.e. MyList constructor is called. But after it executes the MyList::init() method, the application is terminated. It never reaches the Mylist:
nDraw(Canvas) method.
I am new to android. Cant figure out why it is not executing completely. Maybe I need to implement some more methods of ListView class.
Please help.
I want to create my own Mylist_view by extending from ListView and implementing its methods. My code is not running properly.
The MyList class goes like this:
Code:
public class MyList extends ListView{
private Paint marginPaint;
private Paint linePaint;
int paperColor;
private float margin;
public MyList(Context context) {
super(context);
init();
// TODO Auto-generated constructor stub
}
public MyList(Context context, AttributeSet atts,int ds)
{
super(context,atts,ds);
init();
}
public MyList(Context context, AttributeSet atts)
{
super(context,atts);
init();
}
private void init()
{
final Resources myResources=getResources();
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.notepad_lines));
paperColor=myResources.getColor(R.color.notepad_paper);
margin=myResources.getDimension(R.dimen.notepad_margin);
}
//draw the back ground screen
public void onDraw(Canvas canvas)
{
canvas.drawColor(paperColor);
canvas.drawLine(0, 0, getMeasuredHeight(), 0, linePaint);
canvas.drawLine(0, getMeasuredHeight(), getMeasuredWidth(), getMeasuredHeight(), linePaint);
canvas.drawLine(margin,0, margin, getMeasuredHeight(), marginPaint);
canvas.save();
canvas.translate(margin, 0);
super.onDraw(canvas);
canvas.restore();
}My Activity class goes like this:
Code:
public class ToDoList extends Activity {
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
final EditText myEditText= (EditText) findViewById(R.id.myEditText);
ListView myListView= (ListView)findViewById(R.id.myListView);
int resId=R.layout.mylist_item;
final ArrayList<String> items=new ArrayList<String>();
final ArrayAdapter<String> aa=new ArrayAdapter<String>(this,resId,items);
myListView.setAdapter(aa);
myEditText.setOnKeyListener(new OnKeyListener(){
public boolean onKey(View v, int keyCode, KeyEvent event) {
// TODO Auto-generated method stub
if(event.getAction()==KeyEvent.ACTION_DOWN)
{
// if(keyCode==KeyEvent.KEYCODE_DPAD_CENTER)
//{
items.add(0, myEditText.getText().toString());
aa.notifyDataSetChanged();
myEditText.setText("");
return true;
//}
}
return false;
}
}); }}The resources mylist_item.xml is below:
Code:
<?xml version="1.0" encoding="UTF-8"?>
<com.todolist.MyList
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:textColor="@color/notepad_text"
/>I tried debugging the above code. The "EditText" resource is loading properly. But when I click on the down arrow key, mylist_item is loaded, i.e. MyList constructor is called. But after it executes the MyList::init() method, the application is terminated. It never reaches the Mylist:
nDraw(Canvas) method. I am new to android. Cant figure out why it is not executing completely. Maybe I need to implement some more methods of ListView class.
Please help.