Android 从应用框架角度看ListView与Adapter类别

核心提示：coll.add("Hello!!");coll.add("Exit");}public int getCount() {return coll.size();}public Object getItem(int position) {return coll.get(positi

coll.add("Hello!!");

coll.add("Exit");

}

public int getCount() {

return coll.size();

}

public Object getItem(int position) {

return coll.get(position);

}

public long getItemId(int position) {

return position;

}

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

TextView tv;

if (convertView == null)

tv = new TextView(ctx);

else

tv = (TextView)convertView;

tv.setTextColor(Color.CYAN);

tv.setHeight(45);

tv.setTextSize(26);

tv.setText(coll.get(position));

return tv;

}

}

其于，这样的基本结构，就能进一步发展出各式各样的Adapter了。例如ArrayAdapter、SimpleAdapter等等。于此，只节录讲义的前段基础部份，至于后段的应用部分，就省略之。