protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
initView();
}
private void initView() {
recyclerView = (RecyclerView) findViewById(R.id.rv);
// use this setting to improve performance if you know that changes
// in content do not change the layout size of the RecyclerView
recyclerView.setHasFixedSize(true);
// use a linear layout manager
LinearLayoutManager ll = new LinearLayoutManager(this);
recyclerView.setLayoutManager(ll);
initializeData();
recyclerAdapter = new RecyclerAdapter(persons);
recyclerView.setAdapter(recyclerAdapter);
}
private void initializeData(){
persons = new ArrayList<>();
persons.add(new Person("Emma Wilson", "23 years old", R.mipmap.ic_launcher));
persons.add(new Person("Lavery Maiss", "25 years old", R.mipmap.ic_launcher));
persons.add(new Person("Lillie Watts", "35 years old", R.mipmap.ic_launcher));
}
public class RecyclerAdapter extends RecyclerView.Adapter<RecyclerAdapter.ViewHolder>{
private List<Person> list;
public RecyclerAdapter(List<Person> list) {
this.list = list;
}
//为ViewHolder设置数据
@Override
public ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
View view = LayoutInflater.from(parent.getContext()).inflate(R.layout.item, parent, false);
ViewHolder viewHolder = new ViewHolder(view);
return viewHolder;
}
@Override
public void onAttachedToRecyclerView(RecyclerView recyclerView) {
super.onAttachedToRecyclerView(recyclerView);
}
//用于创建ViewHolder
@Override
public void onBindViewHolder(ViewHolder holder, int position) {
Person person = list.get(position);
holder.nameTv.setText(person.name);
holder.ageTv.setText(person.age);
holder.imageView.setImageResource(person.photoId);
}
@Override
public int getItemCount() {
return list.size();
}
// 删除指定的Item
public void removeData(int position)
{
list.remove(position);
// 通知RecyclerView控件某个Item已经被删除
notifyItemRemoved(position);
}
// 在指定位置添加一个新的Item
public void addItem(Person person,int positionToAdd)
{
list.add(person);
// 通知RecyclerView控件插入了某个Item
notifyItemInserted(positionToAdd);
}
public class ViewHolder extends RecyclerView.ViewHolder {
TextView nameTv;
TextView ageTv;
ImageView imageView;
public ViewHolder(View itemView) {
super(itemView);
nameTv = (TextView) itemView.findViewById(R.id.name);
ageTv = (TextView) itemView.findViewById(R.id.age);
imageView = (ImageView) itemView.findViewById(R.id.avater);
}
}
}
public class RecyclerItemClickListener implements RecyclerView.OnItemTouchListener{
private View childView;
private RecyclerView touchView;
public RecyclerItemClickListener(Context context, final OnItemClickListener mListener) {
mGestureDetector = new GestureDetector(context, new GestureDetector.SimpleOnGestureListener(){
@Override
public boolean onSingleTapUp(MotionEvent ev) {
if (childView != null && mListener != null) {
mListener.onItemClick(childView, touchView.getChildPosition(childView));
}
return true;
}
@Override
public void onLongPress(MotionEvent ev) {
if (childView != null && mListener != null) {
mListener.onLongClick(childView, touchView.getChildPosition(childView));
}
}
});
}
GestureDetector mGestureDetector;
public interface OnItemClickListener {
public void onItemClick(View view, int position);
public void onLongClick(View view, int posotion);
}
@Override
public boolean onInterceptTouchEvent(RecyclerView recyclerView, MotionEvent motionEvent) {
mGestureDetector.onTouchEvent(motionEvent);
childView = recyclerView.findChildViewUnder(motionEvent.getX(), motionEvent.getY());
touchView = recyclerView;
return false;
}
@Override
public void onTouchEvent(RecyclerView recyclerView, MotionEvent motionEvent) {
}
}
recyclerView.addOnItemTouchListener(new RecyclerItemClickListener(this,
new RecyclerItemClickListener.OnItemClickListener() {
@Override
public void onItemClick(View view, int position) {
Log.d(TAG, "onItemClick : postion " + position);
}
@Override
public void onLongClick(View view, int posotion) {
Log.d(TAG, "onLongClick position : " + posotion);
}
}));
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