Android_自定义简便快速通用的SimpleBaseAdapter

public abstract class SimpleBaseAdapter<T> extends BaseAdapter {

protected Context context;
protected List<T> data;

public SimpleBaseAdapter(Context context){
this(context, null);
}
public SimpleBaseAdapter(Context context, List<T> data) {
this.context = context;
this.data = data == null ? new ArrayList<T>() : new ArrayList<T>(data);
}

@Override
public int getCount() {
return data.size();
}

@Override
public Object getItem(int position) {
if (position >= data.size())
return null;
return data.get(position);
}

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

/**
* 该方法需要子类实现，需要返回item布局的resource id
*
* @return
*/
public abstract int getItemResource();

/**
* 使用该getItemView方法替换原来的getView方法，需要子类实现
*
* @param position
* @param convertView
* @param parent
* @param holder
* @return
*/
public abstract View getItemView(int position, View convertView, ViewHolder holder);

@Override
public View getView(int position, View convertView, ViewGroup parent) {
ViewHolder holder;
if (null == convertView) {
convertView = View.inflate(context, getItemResource(), null);
holder = new ViewHolder(convertView);
convertView.setTag(holder);
} else {
holder = (ViewHolder) convertView.getTag();
}
return getItemView(position, convertView, holder);
}

public class ViewHolder {
private SparseArray<View> views = new SparseArray<View>();
private View convertView;

public ViewHolder(View convertView) {
this.convertView = convertView;
}

@SuppressWarnings("unchecked")
public <T extends View> T getView(int resId) {
View v = views.get(resId);
if (v == null) {
v = convertView.findViewById(resId);
views.put(resId, v);
}
return (T) v;
}
}

public void addAll(List<T> elem) {
data.addAll(elem);
notifyDataSetChanged();
}

public void remove(T elem) {
data.remove(elem);
notifyDataSetChanged();
}

public void remove(int index) {
data.remove(index);
notifyDataSetChanged();
}

public void replaceAll(List<T> elem) {
data.clear();
data.addAll(elem);
notifyDataSetChanged();
}
}

实例代码

private class MyAdapter extends SimpleBaseAdapter<String> {

public MyAdapter(Context context, List<String> data) {
super(context, data);
}

@Override
public int getItemResource() {
return R.layout.layout_item;
}

@Override
public View getItemView(int position, View convertView, SimpleBaseAdapter<String>.ViewHolder holder) {
TextView tvIndex = holder.getView(R.id.item_index);
TextView tvContent = holder.getView(R.id.item_content);

tvIndex.setText("p:" + position);
tvContent.setText(getItem(position).toString());
return convertView;
}

}