Question

So I’ve been searching a long time for this, trying out a lot of stuff, but it doesn’t seem to work… I’ve recently started programming for Android, and I’m making a chat-application for a website.

Now I’ve come to a point where I want to add smileys/emoticons to the application, and by searching I found these websites:
http://blog.stylingandroid.com/archives/177
http://www.coderanch.com/t/488673/Android/Mobile/styling-items-ListView

My code:

private void updateList()
{
    ListView list = this.getListView();

    if(!parsedData.isEmpty())
    {
        ArrayAdapter<String> adapter = new MyAdapter(this, R.layout.list_item, parsedData);

    list.setAdapter(adapter);
    list.setTextFilterEnabled(true);
    }
}

class MyAdapter extends ArrayAdapter<String>
{
    ArrayList<String> mStrings;
    LayoutInflater mInflater; 

    public MyAdapter(Context context, int textViewResourceId, ArrayList<String> parsedData)
    {
        super(context, textViewResourceId, parsedData);
        mStrings = parsedData;
        mInflater = (LayoutInflater) HopeloosChatActivity.this.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
    }

    @Override
    public View getView(int position, View convertView, ViewGroup parent)
    {
        if (convertView == null)
        {
            convertView = mInflater.inflate(R.layout.main, null, false);  
        }

        TextView text = (TextView)convertView.findViewById(R.id.TextView);
        SpannableStringBuilder ssb = new SpannableStringBuilder("Test  ");
        Bitmap emoticon = BitmapFactory.decodeResource( getResources(), R.drawable.icon);
        ssb.setSpan(new ImageSpan(emoticon), 5, 6, Spannable.SPAN_INCLUSIVE_INCLUSIVE); 
        text.setText(ssb, BufferType.SPANNABLE);

        return convertView;
    }
}

I do use setContentView(R.layout.main); in the OnCreate()-method

My main.xml contains the ListView part:

<ListView android:id="@android:id/list"
android:layout_width="match_parent"
android:layout_height="0dip"
android:layout_weight="1" />

And list_item.xml contains the TextView:

<TextView xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/TextView"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:padding="10dp"
android:textSize="16sp"
android:autoLink="web"
android:linksClickable="true" >
</Textview>

When I run my code, I get a Nullpointer because text is null, and I’m kinda stuck. Could anyone point me in the right direction or help me a bit?

Thanks in advance!

Answer 1

You are inflating convertView using R.layout.main:

convertView = mInflater.inflate(R.layout.main, null, false);

This isn’t right; you’re inflating your ListView‘s layout each time. Use this instead:

convertView = mInflater.inflate(R.layout.list_item, null, false);

Additionally, your TextView should be wrapped in a layout, or convertView may be the TextView itself, and findViewById(...) won’t work on it. Actually, thanks to @Jens, this crossed-out text doesn’t apply; using findViewById on the same object you’re looking for will still work.