为RecyclerView添加点击事件、长按事件
public class AppAdapter extends RecyclerView.Adapter<RecyclerView.ViewHolder> implements View.OnClickListener, View.OnLongClickListener {
public static final int TYPE_HEAD = 0;
public static final int TYPE_APPS = 1;
// 这里数据源有两个(系统应用列表和用户应用列表)
private ArrayList<AppInfo> mUserList; // 所有已安装用户应用的集合
private ArrayList<AppInfo> mSystemList; // 所有已安装系统应用的集合
public AppAdapter(ArrayList<AppInfo> userList, ArrayList<AppInfo> systemList) {
mUserList = userList;
mSystemList = systemList;
}
@Override public int getItemViewType(int position) {
if (position == 0 || position == mUserList.size() + 1) {
return TYPE_HEAD;
} else {
return TYPE_APPS;
}
}
@Override public RecyclerView.ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
View view = null;
RecyclerView.ViewHolder holder = null;
switch (viewType) {
case TYPE_HEAD:
view = LayoutInflater.from(parent.getContext()).inflate(R.layout.list_item_header, null);
holder = new HeadHolder(view);
break;
case TYPE_APPS:
view = LayoutInflater.from(parent.getContext()).inflate(R.layout.list_item_appinfo, null);
/**
* 为展示应用信息的布局添加点击和长按事件监听
*/
view.setOnClickListener(this);
view.setOnLongClickListener(this);
holder = new AppsHolder(view);
break;
}
return holder;
}
@Override public void onBindViewHolder(RecyclerView.ViewHolder holder, int position) {
switch (getItemViewType(position)) {
case TYPE_HEAD:
if (0 == position) {
((HeadHolder) holder).tvHead.setText("用户应用(" +mUserList.size() + ")");
} else {
((HeadHolder) holder).tvHead.setText("系统应用(" + mSystemList.size() + ")");
}
break;
case TYPE_APPS:
AppInfo info;
if (position < mUserList.size() + 1) {
info = mUserList.get(position - 1); // 从用户应用列表中获取应用信息
} else {
info = mSystemList.get(position - mUserList.size() - 2); // 从系统应用列表中获取应用信息
}
// 设置控件内容
((AppsHolder) holder).tvName.setText(info.name);
((AppsHolder) holder).ivIcon.setImageDrawable(info.icon);
if (info.isRom) {
((AppsHolder) holder).tvLocation.setText("内置存储卡");
} else {
((AppsHolder) holder).tvLocation.setText("外部存储卡");
}
/**
* 将position保存在itemView的Tag中以便点击时获取
*/
holder.itemView.setTag(position);
break;
}
}
@Override public int getItemCount() {
return mUserList.size() + mSystemList.size() + 2; // 加上两条头布局条目
}
/****************************************
* Holder
*/
class HeadHolder extends RecyclerView.ViewHolder {
@BindView(R.id.tv_head) TextView tvHead;
public HeadHolder(View itemView) {
super(itemView);
ButterKnife.bind(this, itemView);
}
}
class AppsHolder extends RecyclerView.ViewHolder {
@BindView(R.id.tv_name) TextView tvName;
@BindView(R.id.iv_icon) ImageView ivIcon;
@BindView(R.id.tv_location) TextView tvLocation;
public AppsHolder(View itemView) {
super(itemView);
ButterKnife.bind(this, itemView);
}
}
/****************************************
* Listener
*/
/**
* 手动添加点击事件
*/
interface OnClickListener {
void onClick(View view, int position);
}
private OnClickListener mOnClickListener = null;
public void setOnClickListener(OnClickListener listener) {
mOnClickListener = listener;
}
@Override public void onClick(View view) {
if (null != mOnClickListener) {
mOnClickListener.onClick(view, (int) view.getTag());
}
}
/**
* 手动添加长按事件
*/
interface OnLongClickListener {
void onLongClick(View view, int position);
}
private OnLongClickListener mOnLongClickListener = null;
public void setOnLongClickListener(OnLongClickListener listener) {
mOnLongClickListener = listener;
}
@Override public boolean onLongClick(View view) {
if (null != mOnLongClickListener) {
mOnLongClickListener.onLongClick(view, (int) view.getTag());
}
// 消耗事件，否则长按逻辑执行完成后还会进入点击事件的逻辑处理
return true;
}
}