if(convertView == null){
            convertView = lInflater.inflate(R.layout.listview, null);
            holder = new ViewHolder();
            holder.text2 = (TextView)convertView.findViewById(R.id.TextView02);
        convertView.setTag(holder);
        }

        else{
            holder = (ViewHolder)convertView.getTag();
        }

        holder.text2.setText(arr2[position]);
        holder.text2.invalidate();
        int lineCnt = holder.text2.getLineCount();

static class ViewHolder{
        TextView text2;
}

holder.text2.setText(arr2[position]);
holder.text2.post(new Runnable() {
    @Override
    public void run() {
        int lineCnt = holder.text2.getLineCount();
        // Perform any actions you want based on the line count here.
    }
});

textView.post(new Runnable() {
    @Override
    public void run() {
        Log.v("Line count: ", textView.getLineCount()+"");
    }
});

yourTextView.getViewTreeObserver().addOnGlobalLayoutListener(new OnGlobalLayoutListener() {
    @Override
    public void onGlobalLayout() {
        if (yourTextView.getLineCount() > 1) {
            mediaAtomLayout.getViewTreeObserver().removeOnGlobalLayoutListener(this);
        }
    }
});

protected void onCreate(final Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.main);

    new myAsyncTask().execute(null, null, null);
}

private class myAsyncTask extends AsyncTask<Void, Void, Void> {

    @Override
    protected Void doInBackground(final Void... params) {
        // It's okay to leave this as it is
        return null;
    }

    @Override
    protected void onPostExecute(final Void result) {
        super.onPostExecute(result);
        //DO YOUR TASK HERE, getLineCount(), etc.
    }
}