/
DragOnLongPressExampleFragment.java
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/
DragOnLongPressExampleFragment.java
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/*
* Copyright (C) 2015 Haruki Hasegawa
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.h6ah4i.android.example.advrecyclerview.demo_d_on_longpress;
import android.graphics.drawable.NinePatchDrawable;
import android.os.Build;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import com.h6ah4i.android.example.advrecyclerview.R;
import com.h6ah4i.android.example.advrecyclerview.common.data.AbstractDataProvider;
import com.h6ah4i.android.widget.advrecyclerview.animator.DraggableItemAnimator;
import com.h6ah4i.android.widget.advrecyclerview.animator.GeneralItemAnimator;
import com.h6ah4i.android.widget.advrecyclerview.decoration.ItemShadowDecorator;
import com.h6ah4i.android.widget.advrecyclerview.decoration.SimpleListDividerDecorator;
import com.h6ah4i.android.widget.advrecyclerview.draggable.RecyclerViewDragDropManager;
import com.h6ah4i.android.widget.advrecyclerview.utils.WrapperAdapterUtils;
import androidx.annotation.NonNull;
import androidx.annotation.Nullable;
import androidx.core.content.ContextCompat;
import androidx.fragment.app.Fragment;
import androidx.recyclerview.widget.LinearLayoutManager;
import androidx.recyclerview.widget.RecyclerView;
public class DragOnLongPressExampleFragment extends Fragment {
private RecyclerView mRecyclerView;
private RecyclerView.LayoutManager mLayoutManager;
private RecyclerView.Adapter mAdapter;
private RecyclerView.Adapter mWrappedAdapter;
private RecyclerViewDragDropManager mRecyclerViewDragDropManager;
public DragOnLongPressExampleFragment() {
super();
}
@Override
public View onCreateView(@NonNull LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
return inflater.inflate(R.layout.fragment_recycler_list_view, container, false);
}
@Override
public void onViewCreated(@NonNull View view, @Nullable Bundle savedInstanceState) {
super.onViewCreated(view, savedInstanceState);
//noinspection ConstantConditions
mRecyclerView = getView().findViewById(R.id.recycler_view);
mLayoutManager = new LinearLayoutManager(requireContext());
// drag & drop manager
mRecyclerViewDragDropManager = new RecyclerViewDragDropManager();
mRecyclerViewDragDropManager.setDraggingItemShadowDrawable(
(NinePatchDrawable) ContextCompat.getDrawable(requireContext(), R.drawable.material_shadow_z3));
// Start dragging after long press
mRecyclerViewDragDropManager.setInitiateOnLongPress(true);
mRecyclerViewDragDropManager.setInitiateOnMove(false);
//adapter
final DragOnLongPressExampleAdapter myItemAdapter = new DragOnLongPressExampleAdapter(getDataProvider());
mAdapter = myItemAdapter;
mWrappedAdapter = mRecyclerViewDragDropManager.createWrappedAdapter(myItemAdapter); // wrap for dragging
final GeneralItemAnimator animator = new DraggableItemAnimator();
mRecyclerView.setLayoutManager(mLayoutManager);
mRecyclerView.setAdapter(mWrappedAdapter); // requires *wrapped* adapter
mRecyclerView.setItemAnimator(animator);
// additional decorations
//noinspection StatementWithEmptyBody
if (supportsViewElevation()) {
// Lollipop or later has native drop shadow feature. ItemShadowDecorator is not required.
} else {
mRecyclerView.addItemDecoration(new ItemShadowDecorator((NinePatchDrawable) ContextCompat.getDrawable(requireContext(), R.drawable.material_shadow_z1)));
}
mRecyclerView.addItemDecoration(new SimpleListDividerDecorator(ContextCompat.getDrawable(requireContext(), R.drawable.list_divider_h), true));
mRecyclerViewDragDropManager.attachRecyclerView(mRecyclerView);
// for debugging
// animator.setDebug(true);
// animator.setMoveDuration(2000);
}
@Override
public void onPause() {
mRecyclerViewDragDropManager.cancelDrag();
super.onPause();
}
@Override
public void onDestroyView() {
if (mRecyclerViewDragDropManager != null) {
mRecyclerViewDragDropManager.release();
mRecyclerViewDragDropManager = null;
}
if (mRecyclerView != null) {
mRecyclerView.setItemAnimator(null);
mRecyclerView.setAdapter(null);
mRecyclerView = null;
}
if (mWrappedAdapter != null) {
WrapperAdapterUtils.releaseAll(mWrappedAdapter);
mWrappedAdapter = null;
}
mAdapter = null;
mLayoutManager = null;
super.onDestroyView();
}
private boolean supportsViewElevation() {
return (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP);
}
public AbstractDataProvider getDataProvider() {
return ((DragOnLongPressExampleActivity) getActivity()).getDataProvider();
}
}