Вот как я это делаю:
Код: Выделить всё
ItemTouchHelper.SimpleCallback simpleItemTouchCallback = new ItemTouchHelper.SimpleCallback(0, ItemTouchHelper.LEFT | ItemTouchHelper.RIGHT) {
@Override
public boolean onMove(RecyclerView recyclerView, RecyclerView.ViewHolder viewHolder, RecyclerView.ViewHolder target) {
return false;
}
@Override
public void onSwiped(RecyclerView.ViewHolder viewHolder, int direction) {
int position = viewHolder.getAdapterPosition();
// Do my stuff
// }
}
@Override
public void onChildDraw(Canvas c, RecyclerView recyclerView, RecyclerView.ViewHolder viewHolder, float dX, float dY, int actionState, boolean isCurrentlyActive) {
Bitmap icon;
if(actionState == ItemTouchHelper.ACTION_STATE_SWIPE){
View itemView = viewHolder.itemView;
float height = (float) itemView.getBottom() - (float) itemView.getTop();
float width = height / 3;
if(dX > 0){
p.setColor(Color.parseColor("#388E3C"));
RectF background = new RectF((float) itemView.getLeft(), (float) itemView.getTop(), dX,(float) itemView.getBottom());
c.drawRect(background,p);
icon = BitmapFactory.decodeResource(getActivity().getResources(), R.drawable.ic_delete);
RectF icon_dest = new RectF((float) itemView.getLeft() + width ,(float) itemView.getTop() + width,(float) itemView.getLeft()+ 2*width,(float)itemView.getBottom() - width);
c.drawBitmap(icon,null,icon_dest,p);
} else {
p.setColor(Color.parseColor("#D32F2F"));
RectF background = new RectF((float) itemView.getRight() + dX, (float) itemView.getTop(),(float) itemView.getRight(), (float) itemView.getBottom());
c.drawRect(background,p);
icon = BitmapFactory.decodeResource(getActivity().getResources(), R.drawable.ic_delete);
RectF icon_dest = new RectF((float) itemView.getRight() - 2*width ,(float) itemView.getTop() + width,(float) itemView.getRight() - width,(float)itemView.getBottom() - width);
c.drawBitmap(icon,null,icon_dest,p);
}
}
super.onChildDraw(c, recyclerView, viewHolder, dX, dY, actionState, isCurrentlyActive);
}
};
ItemTouchHelper itemTouchHelper = new ItemTouchHelper(simpleItemTouchCallback);
itemTouchHelper.attachToRecyclerView(mRecyclerView);
java.lang.NullPointerException: попытка вызвать виртуальный метод
'boolean android.graphics.Bitmap.isRecycled()' для нулевой ссылки
объекта
Full StackTrace
Код: Выделить всё
09-12 01:28:58.386 26575-26575/com.ozuf.booker E/AndroidRuntime: FATAL EXCEPTION: main
Process: com.ozuf.booker, PID: 26575
java.lang.NullPointerException: A t t e m p t t o i n v o k e v i r t u a l m e t h o d ' b o o l e a n a n d r o i d . g r a p h i c s . B i t m a p . i s R e c y c l e d ( ) ' o n a n u l l o b j e c t r e f e r e n c e < b r / > a t a n d r o i d . g r a p h i c s . C a n v a s . t h r o w I f C a n n o t D r a w ( C a n v a s . j a v a : 1 2 8 1 ) < b r / > a t a n d r o i d . v i e w . G L E S 2 0 C a n v a s . d r a w B i t m a p ( G L E S 2 0 C a n v a s . j a v a : 6 2 0 ) < b r / > a t c o m . o z u f . b o o k e r . f r a g m e n t s . B o o k F r a g m e n t $ 1 . o n C h i l d D r a w ( B o o k F r a g m e n t . j a v a : 1 4 9 ) < b r / > a t a n d r o i d . s u p p o r t . v 7 . w i d g e t . h e l p e r . I t e m T o u c h H e l p e r $ C a l l b a c k . o n D r a w ( I t e m T o u c h H e l p e r . j a v a : 1 9 5 6 ) < b r / > a t a n d r o i d . s u p p o r t . v 7 . w i d g e t . h e l p e r . I t e m T o u c h H e l p e r $ C a l l b a c k . a c c e s s $ 1 4 0 0 ( I t e m T o u c h H e l p e r . j a v a : 1 3 5 6 ) < b r / > a t a n d r o i d . s u p p o r t . v 7 . w i d g e t . h e l p e r . I t e m T o u c h H e l p e r . o n D r a w ( I t e m T o u c h H e l p e r . j a v a : 5 4 2 ) < b r / > a t a n d r o i d . s u p p o r t . v 7 . w i d g e t . R e c y c l e r V i e w . o n D r a w ( R e c y c l e r V i e w . j a v a : 3 3 7 3 ) < b r / > a t a n d r o i d . v i e w . V i e w . d r a w ( V i e w . j a v a : 1 5 6 3 5 ) < b r / > a t a n d r o i d . s u p p o r t . v 7 . w i d g e t . R e c y c l e r V i e w . d r a w ( R e c y c l e r V i e w . j a v a : 3 3 0 8 ) < b r / > a t a n d r o i d . v i e w . V i e w . u p d a t e D i s p l a y L i s t I f D i r t y ( V i e w . j a v a : 1 4 5 6 8 ) < b r / > a t a n d r o i d . v i e w . V i e w . g e t D i s p l a y L i s t ( V i e w . j a v a : 1 4 5 9 0 ) < b r / > a t a n d r o i d . v i e w . V i e w G r o u p . r e c r e a t e C h i l d D i s p l a y L i s t ( V i e w G r o u p . j a v a : 3 5 8 8 ) < b r / > a t a n d r o i d . v i e w . V i e w G r o u p . d i s p a t c h G e t D i s p l a y L i s t ( V i e w G r o u p . j a v a : 3 5 6 7 ) < b r / > a t a n d r o i d . v i e w . V i e w . u p d a t e D i s p l a y L i s t I f D i r t y ( V i e w . j a v a : 1 4 5 2 8 ) < b r / > a t a n d r o i d . v i e w . V i e w . g e t D i s p l a y L i s t ( V i e w . j a v a : 1 4 5 9 0 ) < b r / > a t a n d r o i d . v i e w . V i e w G r o u p . r e c r e a t e C h i l d D i s p l a y L i s t ( V i e w G r o u p . j a v a : 3 5 8 8 ) < b r / > a t a n d r o i d . v i e w . V i e w G r o u p . d i s p a t c h G e t D i s p l a y L i s t ( V i e w G r o u p . j a v a : 3 5 6 7 ) < b r / > a t a n d r o i d . v i e w . V i e w . u p d a t e D i s p l a y L i s t I f D i r t y ( V i e w . j a v a : 1 4 5 2 8 ) < b r / > a t a n d r o i d . v i e w . V i e w . g e t D i s p l a y L i s t ( V i e w . j a v a : 1 4 5 9 0 ) < b r / > a t a n d r o i d . v i e w . V i e w G r o u p . r e c r e a t e C h i l d D i s p l a y L i s t ( V i e w G r o u p . j a v a : 3 5 8 8 ) < b r / > a t a n d r o i d . v i e w . V i e w G r o u p . d i s p a t c h G e t D i s p l a y L i s t ( V i e w G r o u p . j a v a : 3 5 6 7 ) < b r / > a t a n d r o i d . v i e w . V i e w . u p d a t e D i s p l a y L i s t I f D i r t y ( V i e w . j a v a : 1 4 5 2 8 ) < b r / > a t a n d r o i d . v i e w . V i e w . g e t D i s p l a y L i s t ( V i e w . j a v a : 1 4 5 9 0 ) < br /> at android.view.ViewGroup.recreateChildDisplayList(ViewGroup.java:3588)
at android.view.ViewGroup.dispatchGetDisplayList(ViewGroup.java:3567)
at android.view.View.updateDisplayListIfDirty(View.java:14528)
at android.view.View.getDisplayList(View.java:14590)
at android.view.ViewGroup.recreateChildDisplayList(ViewGroup.java:3588)
at android.view.ViewGroup.dispatchGetDisplayList(ViewGroup.java:3567)
at android.view.View.updateDisplayListIfDirty(View.java:14528)
at android.view.View.getDisplayList(View.java:14590)
at android.view.ViewGroup.recreateChildDisplayList(ViewGroup.java:3588)
at android.view.ViewGroup.dispatchGetDisplayList(ViewGroup.java:3567)
at android.view.View.updateDisplayListIfDirty(View.java:14528)
at android.view.View.getDisplayList(View.java:14590)
at android.view.ViewGroup.recreateChildDisplayList(ViewGroup.java:3588)
at android.view.ViewGroup.dispatchGetDisplayList(ViewGroup.java:3567)
at android.view.View.updateDisplayListIfDirty(View.java:14528)
at android.view.View.getDisplayList(View.java:14590)
at android.view.ViewGroup.recreateChildDisplayList(ViewGroup.java:3588)
at android.view.ViewGroup.dispatchGetDisplayList(ViewGroup.java:3567)
at android.view.View.updateDisplayListIfDirty(View.java:14528)
at android.view.View.getDisplayList(View.java:14590)
at android.view.ViewGroup.recreateChildDisplayList(ViewGroup.java:3588)
at android.view.ViewGroup.dispatchGetDisplayList(ViewGroup.java:3567)
at android.view.View.updateDisplayListIfDirty(View.java:14528)
at android.view.View.getDisplayList(View.java:14590)
at android.view.ThreadedRenderer.updateViewTreeDisplayList(ThreadedRenderer.java:273)
at android.view.ThreadedRenderer.updateRootDisplayList(ThreadedRenderer.java:279)
at android.view.ThreadedRenderer.draw(ThreadedRenderer.java:318)
at android.view.ViewRootImpl.draw(ViewRootImpl.java:2575)
at android.view.ViewRootImpl.performDraw(ViewRootImpl.java:2385)
at android.view.ViewRootImpl.performTraversals(ViewRootImpl.java:2012)
at android.view.ViewRootImpl.doTraversal(ViewRootImpl.java:1073)
at android.view.ViewRootImpl$TraversalRunnable.run(ViewRootImpl.java:5988)
at android.view.Choreographer$CallbackRecord.run(Choreographer.java:767)
at android.view.Choreographer.doCallbacks(Chor
