Android 如何在触摸时获取recyclerView项目的位置
我有一个Android 如何在触摸时获取recyclerView项目的位置,android,navigation-drawer,android-recyclerview,Android,Navigation Drawer,Android Recyclerview,我有一个recyclerView在DrawerLayout里面。每行项目都有一个图像视图,图标和一个文本框,文本。我使用addonimtouchlistener在用户单击时检测行项目的位置,以便打开一个新片段。这是我的代码,来自addonimtouchlistener: mRecyclerView.addOnItemTouchListener(new RecyclerView.OnItemTouchListener() { @Override public boo
recyclerView
在DrawerLayout
里面。每行项目都有一个图像视图
,图标和一个文本框
,文本。我使用addonimtouchlistener
在用户单击时检测行项目的位置,以便打开一个新片段。这是我的代码,来自addonimtouchlistener
:
mRecyclerView.addOnItemTouchListener(new RecyclerView.OnItemTouchListener() {
@Override
public boolean onInterceptTouchEvent(RecyclerView rv, MotionEvent e) {
View item = rv.findChildViewUnder(e.getX(),e.getY()); //finding the view that clicked , using coordinates X and Y
int position = rv.getChildLayoutPosition(item); //getting the position of the item inside the list
//Log.d("billy",String.valueOf(position));
onListViewItemClick(position);
mDrawer.closeDrawers(); // closing the navigation drawer
return true;
}
@Override
public void onTouchEvent(RecyclerView rv, MotionEvent e) {
}
@Override
public void onRequestDisallowInterceptTouchEvent(boolean disallowIntercept) {
}
});
这就是方法onListViewItemClick
:
public void onListViewItemClick(int position) {
DrawerItem data = mList.get(position); //Item of the recycler View at specific position
Bundle lbundle = new Bundle();
lFragmentManager = getFragmentManager();
lFragment = lFragmentManager.findFragmentById(R.id.frame_container);
lFragment = new FragmentHome();
lbundle.putSerializable("Item", data); // sending to fragment the Item of the Recycler View , which pressed
lFragment.setArguments(lbundle);
//To the fragment
lFragmentManager.beginTransaction().replace(R.id.frame_container ,lFragment ).commit();
}
问题是,只有当用户单击导航抽屉行项目的imageView
时,此实现才有效。如果用户单击行项目的TextView
,则变量位置的值为-1。我认为方法查找childviewunder(e.getX(),e.getY())
只返回imageView
,而不是两者都返回。我想要findChildViewUnder(e.getx(),e.getY())
返回视图组
这是定义导航抽屉的每一行项目的XML文件:
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="horizontal"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="?android:attr/selectableItemBackground">
<LinearLayout
android:id="@+id/inner_layout"
android:layout_width="40dp"
android:layout_height="wrap_content"
android:layout_alignBottom="@+id/nv_title"
android:layout_alignTop="@+id/nv_title"
android:layout_alignParentLeft="true"
android:layout_alignParentStart="true">
<ImageView
android:layout_width="25dp"
android:layout_height="25dp"
android:id="@+id/nv_image"
android:background="@android:color/transparent"
android:scaleType="fitXY"
android:layout_marginLeft="15dp"
android:layout_gravity="center"/>
</LinearLayout>
<TextView
android:id="@+id/nv_title"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:paddingLeft="13dp"
android:minHeight="?android:attr/listPreferredItemHeightSmall"
android:textAppearance="?android:attr/textAppearanceListItemSmall"
android:gravity="center_vertical"
android:layout_centerVertical="true"
android:layout_alignParentRight="true"
android:layout_alignParentEnd="true"
android:layout_toEndOf="@+id/inner_layout"
android:layout_gravity="center"
android:singleLine="true"
android:ellipsize="end"
android:layout_toRightOf="@+id/inner_layout" />
</RelativeLayout>
谢谢你的帮助 如果将onClick listener设置为on
onBindViewHolder
@Override
public void onBindViewHolder(RecyclerView.ViewHolder holder, int position) {
//TODO: Use position here.
}
您可以扩展ViewHolder类,以便在需要单击的项目部分上有一个单击侦听器(即,使用容器捕获“项目单击”)。单击后,您可以对事件执行任何您喜欢的操作,并且准确的位置将是来自ViewHolder本身的
getAdapterPosition()
。如果您注册了ItemTouchListener
,您可以获得如下视图位置:
public class RecyclerItemClickListener implements RecyclerView.OnItemTouchListener {
private static final String TAG = RecyclerItemClickListener.class.getSimpleName();
public void setListener(OnItemClickListener mListener) {
this.mListener = mListener;
}
private OnItemClickListener mListener;
public RecyclerItemClickListener(Context context) {
this(context, null);
}
GestureDetector mGestureDetector;
public RecyclerItemClickListener(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(view, childView, view.getChildAdapterPosition(childView));
}
return false;
}
@Override public void onTouchEvent(RecyclerView view, MotionEvent motionEvent) { }
@Override
public void onRequestDisallowInterceptTouchEvent(boolean disallowIntercept) {
}
}
语句
view.getChildAdapterPosition(childView)
是来自RecyclerView
的方法,返回被触摸视图在适配器中的位置 rv.findChildViewUnder(e.getX(),e.getY())在我的case@Vasilisfoo这个答案很有效。请标记它。它给出-1 bcoz视图项=rv.findChildViewUnder(e.getX(),e.getY());返回空值