adapter基类的封装

public abstract class AdapterBase<T> extends BaseAdapter {

protected List<T> mList = new LinkedList<T>();
protected Context mContext;
protected int mItemLayoutId;

public AdapterBase() {
}

public AdapterBase(Context mContext, List<T> list, int mItemLayoutId) {
initAdp(mContext, list, mItemLayoutId);
}

public List<T> getList() {
return mList;
}

public void appendToItem(T item) {
if (item == null) {
return;
}
mList.add(item);
afterAddLists(mList);
notifyDataSetChanged();
}

public void setList(List<T> list) {
if (list == null) {
return;
}
mList = list;
afterAddLists(mList);
notifyDataSetChanged();
}

public void appendToList(List<T> list) {
if (list == null) {
return;
}
mList.addAll(list);
afterAddLists(mList);
notifyDataSetChanged();
}

public void appendToTopList(List<T> list) {
if (list == null) {
return;
}
mList.addAll(0, list);
afterAddLists(mList);
notifyDataSetChanged();
}

/**
* 删除指定对象
*
* @param t
*/
public void deleteItem(T t) {
if (t == null) {
return;
}
mList.remove(t);
notifyDataSetChanged();
}

private void initAdp(Context mContext, List<T> list, int mItemLayoutId) {
if (list == null) {
return;
}
this.mList = list;
this.mContext = mContext;
this.mItemLayoutId = mItemLayoutId;
notifyDataSetChanged();
}

public void clear() {
mList.clear();
notifyDataSetChanged();
}

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

@Override
public T getItem(int position) {
if (position > mList.size() - 1) {
return null;
}
return mList.get(position);
}

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

@Override
public View getView(int position, View convertView, ViewGroup parent) {
final ViewHolder viewHolder = getViewHolder(position, convertView,parent);
convertView(viewHolder, getItem(position));
return viewHolder.getConvertView();
}

private ViewHolder getViewHolder(int position, View convertView, ViewGroup parent) {
return ViewHolder.get(mContext, convertView, parent, mItemLayoutId, position);
}

public abstract void convertView(ViewHolder helper, T item);

protected void afterAddLists(List<T> lists) {
}

protected void startActi(Bundle bundle, Class<?> acti) {
Intent intent = new Intent(mContext, acti);
if (bundle != null) {
intent.putExtras(bundle);
}
mContext.startActivity(intent);
}

}

public class ViewHolder {

private int mPosition;
private int mLayoutId;
private Context mContext;
private SparseArray<View> mViews;
private View mConvertView;

public ViewHolder(Context context, ViewGroup parent, int layoutId, int position) {
mContext = context;
mLayoutId = layoutId;
this.mPosition = position;
this.mViews = new SparseArray<View>();
mConvertView = LayoutInflater.from(context).inflate(layoutId, parent, false);
mConvertView.setTag(this);
}

public static ViewHolder get(Context context, View convertView, ViewGroup parent, int layoutId, int position) {
if (convertView == null) {
return new ViewHolder(context, parent, layoutId, position);
} else {
ViewHolder holder = (ViewHolder) convertView.getTag();
holder.mPosition = position;
return holder;
}
}

public int getPosition() {
return mPosition;
}

public int getLayoutId() {
return mLayoutId;
}

/**
* 通过viewId获取控件
* @param viewId
* @return
*/
@SuppressWarnings("unchecked")
public <T extends View> T getView(int viewId) {
View view = mViews.get(viewId);
if (view == null) {
view = mConvertView.findViewById(viewId);
mViews.put(viewId, view);
}
return (T) view;
}

public View getConvertView() {
return mConvertView;
}

/**
* 设置TextView的值
* @param viewId
* @param text
* @return
*/
public ViewHolder setText(int viewId, String text) {
TextView tv = getView(viewId);
tv.setText(text);
return this;
}

/**
*项目中用的图片加载框架是fresco
*/
public ViewHolder setImageUrl(int viewID, String url) {
SimpleDraweeView view = getView(viewID);
if (!url.isEmpty()) {
ImageLoader.loadImage(view, url);
}
return this;
}

public ViewHolder setImageByBuilder(int viewID, String url, int resource) {
SimpleDraweeView view = getView(viewID);
RoundingParams roundingParams =view.getHierarchy().getRoundingParams();
roundingParams.setRoundAsCircle(true);
GenericDraweeHierarchyBuilder builder = new GenericDraweeHierarchyBuilder(mContext.getResources());
builder.setPlaceholderImageScaleType(ScalingUtils.ScaleType.FIT_XY);
builder.setPlaceholderImage(mContext.getResources().getDrawable(resource));
builder.setFailureImageScaleType(ScalingUtils.ScaleType.FIT_XY);
builder.setFailureImage(mContext.getResources().getDrawable(resource));
builder.setRoundingParams(roundingParams);
view.setHierarchy(builder.build());

if (!TextUtils.isEmpty(url)) {
ImageLoader.loadImage(view, url);
} else {
view.setImageResource(resource);
}
return this;
}

public ViewHolder setImageUrl(int viewID, String url, int resource) {
SimpleDraweeView view = getView(viewID);
if (!TextUtils.isEmpty(url)) {
ImageLoader.loadImage(view, url);
} else {
view.setImageResource(resource);
}
return this;
}

public ViewHolder setImageResource(int viewId, int resId) {
ImageView view = getView(viewId);
view.setImageResource(resId);
return this;
}

public ViewHolder setImageBitmap(int viewId, Bitmap bitmap) {
ImageView view = getView(viewId);
view.setImageBitmap(bitmap);
return this;
}

public ViewHolder setImageDrawable(int viewId, Drawable drawable) {
ImageView view = getView(viewId);
view.setImageDrawable(drawable);
return this;
}

public ViewHolder setBackgroundColor(int viewId, int color) {
View view = getView(viewId);
view.setBackgroundColor(color);
return this;
}

public ViewHolder setBackgroundRes(int viewId, int backgroundRes) {
View view = getView(viewId);
view.setBackgroundResource(backgroundRes);
return this;
}

public ViewHolder setTextColor(int viewId, int textColor) {
TextView view = getView(viewId);
view.setTextColor(textColor);
return this;
}

public ViewHolder setTextColorRes(int viewId, int textColorRes) {
TextView view = getView(viewId);
view.setTextColor(mContext.getResources().getColor(textColorRes));
return this;
}

public ViewHolder setAlpha(int viewId, float value) {
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.HONEYCOMB) {
getView(viewId).setAlpha(value);
} else {
// Pre-honeycomb hack to set Alpha value
AlphaAnimation alpha = new AlphaAnimation(value, value);
alpha.setDuration(0);
alpha.setFillAfter(true);
getView(viewId).startAnimation(alpha);
}
return this;
}

public ViewHolder setVisible(int viewId, boolean visible) {
View view = getView(viewId);
view.setVisibility(visible ? View.VISIBLE : View.GONE);
return this;
}

public ViewHolder setHolderVisible(int viewId, boolean visible) {
View view = getView(viewId);
view.setVisibility(visible ? View.VISIBLE : View.INVISIBLE);
return this;
}

public ViewHolder linkify(int viewId) {
TextView view = getView(viewId);
Linkify.addLinks(view, Linkify.ALL);
return this;
}

public ViewHolder setTypeface(Typeface typeface, int... viewIds) {
for (int viewId : viewIds) {
TextView view = getView(viewId);
view.setTypeface(typeface);
view.setPaintFlags(view.getPaintFlags() | Paint.SUBPIXEL_TEXT_FLAG);
}
return this;
}

public ViewHolder setProgress(int viewId, int progress) {
ProgressBar view = getView(viewId);
view.setProgress(progress);
return this;
}

public ViewHolder setProgress(int viewId, int progress, int max) {
ProgressBar view = getView(viewId);
view.setMax(max);
view.setProgress(progress);
return this;
}

public ViewHolder setMax(int viewId, int max) {
ProgressBar view = getView(viewId);
view.setMax(max);
return this;
}

public ViewHolder setRating(int viewId, float rating) {
RatingBar view = getView(viewId);
view.setRating(rating);
return this;
}

public ViewHolder setRating(int viewId, float rating, int max) {
RatingBar view = getView(viewId);
view.setMax(max);
view.setRating(rating);
return this;
}

public ViewHolder setTag(int viewId, Object tag) {
View view = getView(viewId);
view.setTag(tag);
return this;
}

public ViewHolder setTag(int viewId, int key, Object tag) {
View view = getView(viewId);
view.setTag(key, tag);
return this;
}

public ViewHolder setChecked(int viewId, boolean checked) {
Checkable view = (Checkable) getView(viewId);
view.setChecked(checked);
return this;
}

/**
* 关于事件的
*/
public ViewHolder setOnClickListener(int viewId, View.OnClickListener listener) {
View view = getView(viewId);
view.setOnClickListener(listener);
return this;
}

public ViewHolder setOnTouchListener(int viewId, View.OnTouchListener listener) {
View view = getView(viewId);
view.setOnTouchListener(listener);
return this;
}

public ViewHolder setOnLongClickListener(int viewId, View.OnLongClickListener listener) {
View view = getView(viewId);
view.setOnLongClickListener(listener);
return this;
}

}

AdapterBase mAdapter = new AdapterBase<Entity>(this, new ArrayList<Entity>(), R.layout.adapter_item) {
@Override
public void convertView(ViewHolder helper, Entity item) {
//设置文字
helper.setText(R.id.tv_title, item.title);
//获取控件
ItemView itemView = helper.getView(R.id.iv_item);
...
}
};