ListView items fading when scrolling in Android
public class TasksAdapter extends BaseAdapter {

private String[] items;
private int[] priorities;
private Vector<String> completed;
private Context context;

public TasksAdapter(TasksActivity context, int textViewResourceId, String[] items) {
    if(items != null)
        this.items = items;
    else
        this.items = new String[0];

    this.priorities = new int[this.items.length];
    for(int i = 0; i < this.priorities.length; i++) {
        this.priorities[i] = FMN.PRIORITY_LOW;
    }

    this.completed = new Vector<String>(0);

    this.context = context;
}

public TasksAdapter(TasksActivity context, int textViewResourceId, String[] items, int[] priorities, Vector<String> completed) {
    if(items != null)
        this.items = items;
    else
        this.items = new String[0];

    if(priorities != null)
        this.priorities = priorities;
    else {
        this.priorities = new int[this.items.length];
        for(int i = 0; i < this.priorities.length; i++) {
            this.priorities[i] = FMN.PRIORITY_LOW;
        }
    }

    if(completed != null)
        this.completed = completed;
    else
        this.completed = new Vector<String>(0);

    this.context = context;
}

public View getView(int position, View convertView, ViewGroup parent) {
    View v = convertView;

    if (v == null) {
        LayoutInflater vi = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
        v = vi.inflate(R.layout.task_item, null);
    }

    TextView task = (TextView) v.findViewById(R.id.tv_task);
    task.setText(items[position]);

    ImageView prio = (ImageView) v.findViewById(R.id.im_task_priority);

    switch(priorities[position]) {
    case FMN.PRIORITY_HIGH:
        prio.setImageResource(R.drawable.fmn_priority_high);
        break;

    case FMN.PRIORITY_MEDIUM:
        prio.setImageResource(R.drawable.fmn_priority_low);
        break;

    case FMN.PRIORITY_LOW:
        prio.setImageResource(R.drawable.fmn_priority_medium);
        break;

    default:
        prio.setImageResource(R.drawable.fmn_priority_medium);
        break;
    }

    if((completed.size() != 0) && (completed.contains(task.getText()))) {
        task.setTextColor(Color.rgb(155, 175, 155));
    }

    return v;
}

public int getCount() {
    return items.length;
}

public Object getItem(int position) {
    return position;
}

public long getItemId(int position) {
    return position;
}

}

if((completed.size() != 0) && (completed.contains(task.getText()))) {
    task.setTextColor(Color.rgb(155, 175, 155));
}

if((completed.size() != 0) && (completed.contains(task.getText()))) {
    task.setTextColor(Color.rgb(155, 175, 155));
} else {
    task.setTextColor(Color.rgb(0, 0, 0));
}