到目前为止,我是 android 的新手,我已经创建了带有装饰的回收器视图,但现在我无法在回收器视图中设置 onClick 侦听器,请帮助...第一个错误是点击侦听器界面说
clicklistener 已经在编译单元中定义
因此 onclick 和 onlongclick 方法也会出错....在主要活动中,我在覆盖时遇到错误说
方法不会从其超类覆盖
回收器触摸侦听器代码:
public interface ClickListener {
void onClick(View view, int position);
void onLongClick(View view, int position);
}
public class RecyclerTouchListener implements RecyclerView.OnItemTouchListener {
private GestureDetector gestureDetector;
private MainActivity.ClickListener clickListener;
public RecyclerTouchListener(Context context, final RecyclerView recyclerView, final MainActivity.ClickListener clickListener) {
this.clickListener = clickListener;
gestureDetector = new GestureDetector(context, new GestureDetector.SimpleOnGestureListener() {
@Override
public boolean onSingleTapUp(MotionEvent e) {
return true;
}
@Override
public void onLongPress(MotionEvent e) {
View child = recyclerView.findChildViewUnder(e.getX(), e.getY());
if (child != null && clickListener != null) {
clickListener.onLongClick(child, recyclerView.getChildLayoutPosition(child));
}
}
});
}
@Override
public boolean onInterceptTouchEvent(RecyclerView rv, MotionEvent e) {
View child = rv.findChildViewUnder(e.getX(), e.getY());
if (child != null && clickListener != null && gestureDetector.onTouchEvent(e)) {
clickListener.onClick(child, rv.getChildLayoutPosition(child));
}
return false;
}
@Override
public void onTouchEvent(RecyclerView rv, MotionEvent e) {
}
@Override
public void onRequestDisallowInterceptTouchEvent(boolean disallowIntercept) {
}
}
main_activty:
public class MainActivity extends AppCompatActivity {
private List<Movie> movieList=new ArrayList<>();
private RecyclerView recyclerView;
private MoviesAdapter mAdapter;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Toolbar toolbar=(Toolbar)findViewById(R.id.toolbar);
setSupportActionBar(toolbar);
recyclerView=(RecyclerView)findViewById(R.id.recycler_view);
mAdapter=new MoviesAdapter(movieList);
RecyclerView.LayoutManager mLayoutManager=new LinearLayoutManager(getApplicationContext());
recyclerView.setLayoutManager(mLayoutManager);
recyclerView.setItemAnimator(new DefaultItemAnimator());
recyclerView.setAdapter(mAdapter);
prepareMovieData();
recyclerView.addItemDecoration(new DividerItemDecoration(this, LinearLayoutManager.VERTICAL));
recyclerView.setAdapter(mAdapter);
recyclerView.addOnItemTouchListener(new RecyclerTouchListener(getApplicationContext(), recyclerView, new RecyclerTouchListener.ClickListener() {
@Override
public void onClick(View view, int position) {
Movie movie = movieList.get(position);
Toast.makeText(getApplicationContext(), movie.getTitle() + " is selected!", Toast.LENGTH_SHORT).show();
}
@Override
public void onLongClick(View view, int position) {
}
}));
}
private void prepareMovieData(){
Movie movie = new Movie("Mad Max: Fury Road", "Action & Adventure", "2015");
movieList.add(movie);
movie = new Movie("Inside Out", "Animation, Kids & Family", "2015");
movieList.add(movie);
movie = new Movie("Star Wars: Episode VII - The Force Awakens", "Action", "2015");
movieList.add(movie);
movie = new Movie("Shaun the Sheep", "Animation", "2015");
movieList.add(movie);
movie = new Movie("The Martian", "Science Fiction & Fantasy", "2015");
movieList.add(movie);
movie = new Movie("Mission: Impossible Rogue Nation", "Action", "2015");
movieList.add(movie);
movie = new Movie("Up", "Animation", "2009");
movieList.add(movie);
movie = new Movie("Star Trek", "Science Fiction", "2009");
movieList.add(movie);
movie = new Movie("The LEGO Movie", "Animation", "2014");
movieList.add(movie);
movie = new Movie("Iron Man", "Action & Adventure", "2008");
movieList.add(movie);
movie = new Movie("Aliens", "Science Fiction", "1986");
movieList.add(movie);
movie = new Movie("Chicken Run", "Animation", "2000");
movieList.add(movie);
movie = new Movie("Back to the Future", "Science Fiction", "1985");
movieList.add(movie);
movie = new Movie("Raiders of the Lost Ark", "Action & Adventure", "1981");
movieList.add(movie);
movie = new Movie("Goldfinger", "Action & Adventure", "1965");
movieList.add(movie);
movie = new Movie("Guardians of the Galaxy", "Science Fiction & Fantasy", "2014");
movieList.add(movie);
mAdapter.notifyDataSetChanged();
}
public interface ClickListener {
}
}
我正在使用的自定义实现RecyclerView.OnItemTouchListener
这是它的代码 -
public class RecycleItemClickListener implements RecyclerView.OnItemTouchListener {
private OnItemClickListener mListener;
public interface OnItemClickListener {
public void onItemClick(View view, int position);
}
GestureDetector mGestureDetector;
public RecycleItemClickListener(Context context, OnItemClickListener listener) {
mListener = listener;
mGestureDetector = new GestureDetector(context, new GestureDetector.SimpleOnGestureListener() {
@Override
public boolean onSingleTapUp(MotionEvent e) {
return true;
}
});
}
@Override
public boolean onInterceptTouchEvent(RecyclerView view, MotionEvent e) {
View childView = view.findChildViewUnder(e.getX(), e.getY());
if (childView != null && mListener != null && mGestureDetector.onTouchEvent(e)) {
mListener.onItemClick(childView, view.getChildAdapterPosition(childView));
}
return false;
}
@Override
public void onTouchEvent(RecyclerView view, MotionEvent motionEvent) {
}
@Override
public void onRequestDisallowInterceptTouchEvent(boolean disallowIntercept) {
}
}
然后RecycleItemClickListener
像这样使用这个自定义-
recyclerView.addOnItemTouchListener(
new RecycleItemClickListener(context, new RecycleItemClickListener.OnItemClickListener() {
@Override public void onItemClick(View view, int position) {
// TODO Handle item click
}
})
);
这总是有效:)
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我来说两句