| /* |
| * Copyright (C) 2016 The Android Open Source Project |
| * |
| * 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.android.systemui.qs.customize; |
| |
| import android.app.AlertDialog; |
| import android.app.AlertDialog.Builder; |
| import android.content.ComponentName; |
| import android.content.Context; |
| import android.content.DialogInterface; |
| import android.content.res.Resources; |
| import android.graphics.Canvas; |
| import android.graphics.drawable.Drawable; |
| import android.os.Handler; |
| import android.view.LayoutInflater; |
| import android.view.View; |
| import android.view.View.OnClickListener; |
| import android.view.View.OnLayoutChangeListener; |
| import android.view.ViewGroup; |
| import android.view.accessibility.AccessibilityManager; |
| import android.widget.FrameLayout; |
| import android.widget.TextView; |
| |
| import androidx.core.view.ViewCompat; |
| import androidx.recyclerview.widget.GridLayoutManager.SpanSizeLookup; |
| import androidx.recyclerview.widget.ItemTouchHelper; |
| import androidx.recyclerview.widget.RecyclerView; |
| import androidx.recyclerview.widget.RecyclerView.ItemDecoration; |
| import androidx.recyclerview.widget.RecyclerView.State; |
| import androidx.recyclerview.widget.RecyclerView.ViewHolder; |
| |
| import com.android.internal.logging.UiEventLogger; |
| import com.android.systemui.R; |
| import com.android.systemui.qs.QSEditEvent; |
| import com.android.systemui.qs.QSTileHost; |
| import com.android.systemui.qs.customize.TileAdapter.Holder; |
| import com.android.systemui.qs.customize.TileQueryHelper.TileInfo; |
| import com.android.systemui.qs.customize.TileQueryHelper.TileStateListener; |
| import com.android.systemui.qs.external.CustomTile; |
| import com.android.systemui.qs.tileimpl.QSIconViewImpl; |
| import com.android.systemui.statusbar.phone.SystemUIDialog; |
| |
| import java.util.ArrayList; |
| import java.util.List; |
| |
| public class TileAdapter extends RecyclerView.Adapter<Holder> implements TileStateListener { |
| private static final long DRAG_LENGTH = 100; |
| private static final float DRAG_SCALE = 1.2f; |
| public static final long MOVE_DURATION = 150; |
| |
| private static final int TYPE_TILE = 0; |
| private static final int TYPE_EDIT = 1; |
| private static final int TYPE_ACCESSIBLE_DROP = 2; |
| private static final int TYPE_HEADER = 3; |
| private static final int TYPE_DIVIDER = 4; |
| |
| private static final long EDIT_ID = 10000; |
| private static final long DIVIDER_ID = 20000; |
| |
| private static final int ACTION_NONE = 0; |
| private static final int ACTION_ADD = 1; |
| private static final int ACTION_MOVE = 2; |
| |
| private final Context mContext; |
| |
| private final Handler mHandler = new Handler(); |
| private final List<TileInfo> mTiles = new ArrayList<>(); |
| private final ItemTouchHelper mItemTouchHelper; |
| private final ItemDecoration mDecoration; |
| private final AccessibilityManager mAccessibilityManager; |
| private final int mMinNumTiles; |
| private int mEditIndex; |
| private int mTileDividerIndex; |
| private boolean mNeedsFocus; |
| private List<String> mCurrentSpecs; |
| private List<TileInfo> mOtherTiles; |
| private List<TileInfo> mAllTiles; |
| |
| private Holder mCurrentDrag; |
| private int mAccessibilityAction = ACTION_NONE; |
| private int mAccessibilityFromIndex; |
| private CharSequence mAccessibilityFromLabel; |
| private QSTileHost mHost; |
| private final UiEventLogger mUiEventLogger; |
| |
| public TileAdapter(Context context, UiEventLogger uiEventLogger) { |
| mContext = context; |
| mUiEventLogger = uiEventLogger; |
| mAccessibilityManager = context.getSystemService(AccessibilityManager.class); |
| mItemTouchHelper = new ItemTouchHelper(mCallbacks); |
| mDecoration = new TileItemDecoration(context); |
| mMinNumTiles = context.getResources().getInteger(R.integer.quick_settings_min_num_tiles); |
| } |
| |
| public void setHost(QSTileHost host) { |
| mHost = host; |
| } |
| |
| public ItemTouchHelper getItemTouchHelper() { |
| return mItemTouchHelper; |
| } |
| |
| public ItemDecoration getItemDecoration() { |
| return mDecoration; |
| } |
| |
| public void saveSpecs(QSTileHost host) { |
| List<String> newSpecs = new ArrayList<>(); |
| clearAccessibilityState(); |
| for (int i = 1; i < mTiles.size() && mTiles.get(i) != null; i++) { |
| newSpecs.add(mTiles.get(i).spec); |
| } |
| host.changeTiles(mCurrentSpecs, newSpecs); |
| mCurrentSpecs = newSpecs; |
| } |
| |
| private void clearAccessibilityState() { |
| if (mAccessibilityAction == ACTION_ADD) { |
| // Remove blank tile from last spot |
| mTiles.remove(--mEditIndex); |
| // Update the tile divider position |
| mTileDividerIndex--; |
| notifyDataSetChanged(); |
| } |
| mAccessibilityAction = ACTION_NONE; |
| } |
| |
| public void resetTileSpecs(QSTileHost host, List<String> specs) { |
| // Notify the host so the tiles get removed callbacks. |
| host.changeTiles(mCurrentSpecs, specs); |
| setTileSpecs(specs); |
| } |
| |
| public void setTileSpecs(List<String> currentSpecs) { |
| if (currentSpecs.equals(mCurrentSpecs)) { |
| return; |
| } |
| mCurrentSpecs = currentSpecs; |
| recalcSpecs(); |
| } |
| |
| @Override |
| public void onTilesChanged(List<TileInfo> tiles) { |
| mAllTiles = tiles; |
| recalcSpecs(); |
| } |
| |
| private void recalcSpecs() { |
| if (mCurrentSpecs == null || mAllTiles == null) { |
| return; |
| } |
| mOtherTiles = new ArrayList<TileInfo>(mAllTiles); |
| mTiles.clear(); |
| mTiles.add(null); |
| for (int i = 0; i < mCurrentSpecs.size(); i++) { |
| final TileInfo tile = getAndRemoveOther(mCurrentSpecs.get(i)); |
| if (tile != null) { |
| mTiles.add(tile); |
| } |
| } |
| mTiles.add(null); |
| for (int i = 0; i < mOtherTiles.size(); i++) { |
| final TileInfo tile = mOtherTiles.get(i); |
| if (tile.isSystem) { |
| mOtherTiles.remove(i--); |
| mTiles.add(tile); |
| } |
| } |
| mTileDividerIndex = mTiles.size(); |
| mTiles.add(null); |
| mTiles.addAll(mOtherTiles); |
| updateDividerLocations(); |
| notifyDataSetChanged(); |
| } |
| |
| private TileInfo getAndRemoveOther(String s) { |
| for (int i = 0; i < mOtherTiles.size(); i++) { |
| if (mOtherTiles.get(i).spec.equals(s)) { |
| return mOtherTiles.remove(i); |
| } |
| } |
| return null; |
| } |
| |
| @Override |
| public int getItemViewType(int position) { |
| if (position == 0) { |
| return TYPE_HEADER; |
| } |
| if (mAccessibilityAction == ACTION_ADD && position == mEditIndex - 1) { |
| return TYPE_ACCESSIBLE_DROP; |
| } |
| if (position == mTileDividerIndex) { |
| return TYPE_DIVIDER; |
| } |
| if (mTiles.get(position) == null) { |
| return TYPE_EDIT; |
| } |
| return TYPE_TILE; |
| } |
| |
| @Override |
| public Holder onCreateViewHolder(ViewGroup parent, int viewType) { |
| final Context context = parent.getContext(); |
| LayoutInflater inflater = LayoutInflater.from(context); |
| if (viewType == TYPE_HEADER) { |
| return new Holder(inflater.inflate(R.layout.qs_customize_header, parent, false)); |
| } |
| if (viewType == TYPE_DIVIDER) { |
| return new Holder(inflater.inflate(R.layout.qs_customize_tile_divider, parent, false)); |
| } |
| if (viewType == TYPE_EDIT) { |
| return new Holder(inflater.inflate(R.layout.qs_customize_divider, parent, false)); |
| } |
| FrameLayout frame = (FrameLayout) inflater.inflate(R.layout.qs_customize_tile_frame, parent, |
| false); |
| frame.addView(new CustomizeTileView(context, new QSIconViewImpl(context))); |
| return new Holder(frame); |
| } |
| |
| @Override |
| public int getItemCount() { |
| return mTiles.size(); |
| } |
| |
| @Override |
| public boolean onFailedToRecycleView(Holder holder) { |
| holder.clearDrag(); |
| return true; |
| } |
| |
| private void setSelectableForHeaders(View view) { |
| if (mAccessibilityManager.isTouchExplorationEnabled()) { |
| final boolean selectable = mAccessibilityAction == ACTION_NONE; |
| view.setFocusable(selectable); |
| view.setImportantForAccessibility(selectable |
| ? View.IMPORTANT_FOR_ACCESSIBILITY_YES |
| : View.IMPORTANT_FOR_ACCESSIBILITY_NO_HIDE_DESCENDANTS); |
| view.setFocusableInTouchMode(selectable); |
| } |
| } |
| |
| @Override |
| public void onBindViewHolder(final Holder holder, int position) { |
| if (holder.getItemViewType() == TYPE_HEADER) { |
| setSelectableForHeaders(holder.itemView); |
| return; |
| } |
| if (holder.getItemViewType() == TYPE_DIVIDER) { |
| holder.itemView.setVisibility(mTileDividerIndex < mTiles.size() - 1 ? View.VISIBLE |
| : View.INVISIBLE); |
| return; |
| } |
| if (holder.getItemViewType() == TYPE_EDIT) { |
| final String titleText; |
| Resources res = mContext.getResources(); |
| if (mCurrentDrag == null) { |
| titleText = res.getString(R.string.drag_to_add_tiles); |
| } else if (!canRemoveTiles() && mCurrentDrag.getAdapterPosition() < mEditIndex) { |
| titleText = res.getString(R.string.drag_to_remove_disabled, mMinNumTiles); |
| } else { |
| titleText = res.getString(R.string.drag_to_remove_tiles); |
| } |
| |
| ((TextView) holder.itemView.findViewById(android.R.id.title)).setText(titleText); |
| setSelectableForHeaders(holder.itemView); |
| |
| return; |
| } |
| if (holder.getItemViewType() == TYPE_ACCESSIBLE_DROP) { |
| holder.mTileView.setClickable(true); |
| holder.mTileView.setFocusable(true); |
| holder.mTileView.setFocusableInTouchMode(true); |
| holder.mTileView.setVisibility(View.VISIBLE); |
| holder.mTileView.setImportantForAccessibility(View.IMPORTANT_FOR_ACCESSIBILITY_YES); |
| holder.mTileView.setContentDescription(mContext.getString( |
| R.string.accessibility_qs_edit_tile_add, mAccessibilityFromLabel, |
| position)); |
| holder.mTileView.setOnClickListener(new OnClickListener() { |
| @Override |
| public void onClick(View v) { |
| selectPosition(holder.getAdapterPosition(), v); |
| } |
| }); |
| focusOnHolder(holder); |
| return; |
| } |
| |
| TileInfo info = mTiles.get(position); |
| |
| if (position > mEditIndex) { |
| info.state.contentDescription = mContext.getString( |
| R.string.accessibility_qs_edit_add_tile_label, info.state.label); |
| } else if (mAccessibilityAction == ACTION_ADD) { |
| info.state.contentDescription = mContext.getString( |
| R.string.accessibility_qs_edit_tile_add, mAccessibilityFromLabel, position); |
| } else if (mAccessibilityAction == ACTION_MOVE) { |
| info.state.contentDescription = mContext.getString( |
| R.string.accessibility_qs_edit_tile_move, mAccessibilityFromLabel, position); |
| } else { |
| info.state.contentDescription = mContext.getString( |
| R.string.accessibility_qs_edit_tile_label, position, info.state.label); |
| } |
| holder.mTileView.handleStateChanged(info.state); |
| holder.mTileView.setShowAppLabel(position > mEditIndex && !info.isSystem); |
| |
| if (mAccessibilityManager.isTouchExplorationEnabled()) { |
| final boolean selectable = mAccessibilityAction == ACTION_NONE || position < mEditIndex; |
| holder.mTileView.setClickable(selectable); |
| holder.mTileView.setFocusable(selectable); |
| holder.mTileView.setImportantForAccessibility(selectable |
| ? View.IMPORTANT_FOR_ACCESSIBILITY_YES |
| : View.IMPORTANT_FOR_ACCESSIBILITY_NO_HIDE_DESCENDANTS); |
| holder.mTileView.setFocusableInTouchMode(selectable); |
| if (selectable) { |
| holder.mTileView.setOnClickListener(new OnClickListener() { |
| @Override |
| public void onClick(View v) { |
| int position = holder.getAdapterPosition(); |
| if (position == RecyclerView.NO_POSITION) return; |
| if (mAccessibilityAction != ACTION_NONE) { |
| selectPosition(position, v); |
| } else { |
| if (position < mEditIndex && canRemoveTiles()) { |
| showAccessibilityDialog(position, v); |
| } else if (position < mEditIndex && !canRemoveTiles()) { |
| startAccessibleMove(position); |
| } else { |
| startAccessibleAdd(position); |
| } |
| } |
| } |
| }); |
| if (position == mAccessibilityFromIndex) { |
| focusOnHolder(holder); |
| } |
| } |
| } |
| } |
| |
| private void focusOnHolder(Holder holder) { |
| if (mNeedsFocus) { |
| // Wait for this to get laid out then set its focus. |
| // Ensure that tile gets laid out so we get the callback. |
| holder.mTileView.requestLayout(); |
| holder.mTileView.addOnLayoutChangeListener(new OnLayoutChangeListener() { |
| @Override |
| public void onLayoutChange(View v, int left, int top, int right, int bottom, |
| int oldLeft, int oldTop, int oldRight, int oldBottom) { |
| holder.mTileView.removeOnLayoutChangeListener(this); |
| holder.mTileView.requestFocus(); |
| } |
| }); |
| mNeedsFocus = false; |
| } |
| } |
| |
| private boolean canRemoveTiles() { |
| return mCurrentSpecs.size() > mMinNumTiles; |
| } |
| |
| private void selectPosition(int position, View v) { |
| if (mAccessibilityAction == ACTION_ADD) { |
| // Remove the placeholder. |
| mTiles.remove(mEditIndex--); |
| notifyItemRemoved(mEditIndex); |
| } |
| mAccessibilityAction = ACTION_NONE; |
| move(mAccessibilityFromIndex, position, v); |
| notifyDataSetChanged(); |
| } |
| |
| private void showAccessibilityDialog(final int position, final View v) { |
| final TileInfo info = mTiles.get(position); |
| CharSequence[] options = new CharSequence[] { |
| mContext.getString(R.string.accessibility_qs_edit_move_tile, info.state.label), |
| mContext.getString(R.string.accessibility_qs_edit_remove_tile, info.state.label), |
| }; |
| AlertDialog dialog = new Builder(mContext) |
| .setItems(options, new DialogInterface.OnClickListener() { |
| @Override |
| public void onClick(DialogInterface dialog, int which) { |
| if (which == 0) { |
| startAccessibleMove(position); |
| } else { |
| move(position, info.isSystem ? mEditIndex : mTileDividerIndex, v); |
| notifyItemChanged(mTileDividerIndex); |
| notifyDataSetChanged(); |
| } |
| } |
| }).setNegativeButton(android.R.string.cancel, null) |
| .create(); |
| SystemUIDialog.setShowForAllUsers(dialog, true); |
| SystemUIDialog.applyFlags(dialog); |
| dialog.show(); |
| } |
| |
| private void startAccessibleAdd(int position) { |
| mAccessibilityFromIndex = position; |
| mAccessibilityFromLabel = mTiles.get(position).state.label; |
| mAccessibilityAction = ACTION_ADD; |
| // Add placeholder for last slot. |
| mTiles.add(mEditIndex++, null); |
| // Update the tile divider position |
| mTileDividerIndex++; |
| mNeedsFocus = true; |
| notifyDataSetChanged(); |
| } |
| |
| private void startAccessibleMove(int position) { |
| mAccessibilityFromIndex = position; |
| mAccessibilityFromLabel = mTiles.get(position).state.label; |
| mAccessibilityAction = ACTION_MOVE; |
| mNeedsFocus = true; |
| notifyDataSetChanged(); |
| } |
| |
| public SpanSizeLookup getSizeLookup() { |
| return mSizeLookup; |
| } |
| |
| private boolean move(int from, int to, View v) { |
| if (to == from) { |
| return true; |
| } |
| CharSequence fromLabel = mTiles.get(from).state.label; |
| move(from, to, mTiles); |
| updateDividerLocations(); |
| if (to >= mEditIndex) { |
| mUiEventLogger.log(QSEditEvent.QS_EDIT_REMOVE, 0, strip(mTiles.get(to))); |
| } else if (from >= mEditIndex) { |
| mUiEventLogger.log(QSEditEvent.QS_EDIT_ADD, 0, strip(mTiles.get(to))); |
| } else { |
| mUiEventLogger.log(QSEditEvent.QS_EDIT_MOVE, 0, strip(mTiles.get(to))); |
| } |
| saveSpecs(mHost); |
| return true; |
| } |
| |
| private void updateDividerLocations() { |
| // The first null is the header label (index 0) so we can skip it, |
| // the second null is the edit tiles label, the third null is the tile divider. |
| // If there is no third null, then there are no non-system tiles. |
| mEditIndex = -1; |
| mTileDividerIndex = mTiles.size(); |
| for (int i = 1; i < mTiles.size(); i++) { |
| if (mTiles.get(i) == null) { |
| if (mEditIndex == -1) { |
| mEditIndex = i; |
| } else { |
| mTileDividerIndex = i; |
| } |
| } |
| } |
| if (mTiles.size() - 1 == mTileDividerIndex) { |
| notifyItemChanged(mTileDividerIndex); |
| } |
| } |
| |
| private static String strip(TileInfo tileInfo) { |
| String spec = tileInfo.spec; |
| if (spec.startsWith(CustomTile.PREFIX)) { |
| ComponentName component = CustomTile.getComponentFromSpec(spec); |
| return component.getPackageName(); |
| } |
| return spec; |
| } |
| |
| private <T> void move(int from, int to, List<T> list) { |
| list.add(to, list.remove(from)); |
| notifyItemMoved(from, to); |
| } |
| |
| public class Holder extends ViewHolder { |
| private CustomizeTileView mTileView; |
| |
| public Holder(View itemView) { |
| super(itemView); |
| if (itemView instanceof FrameLayout) { |
| mTileView = (CustomizeTileView) ((FrameLayout) itemView).getChildAt(0); |
| mTileView.setBackground(null); |
| mTileView.getIcon().disableAnimation(); |
| } |
| } |
| |
| public void clearDrag() { |
| itemView.clearAnimation(); |
| mTileView.findViewById(R.id.tile_label).clearAnimation(); |
| mTileView.findViewById(R.id.tile_label).setAlpha(1); |
| mTileView.getAppLabel().clearAnimation(); |
| mTileView.getAppLabel().setAlpha(.6f); |
| } |
| |
| public void startDrag() { |
| itemView.animate() |
| .setDuration(DRAG_LENGTH) |
| .scaleX(DRAG_SCALE) |
| .scaleY(DRAG_SCALE); |
| mTileView.findViewById(R.id.tile_label).animate() |
| .setDuration(DRAG_LENGTH) |
| .alpha(0); |
| mTileView.getAppLabel().animate() |
| .setDuration(DRAG_LENGTH) |
| .alpha(0); |
| } |
| |
| public void stopDrag() { |
| itemView.animate() |
| .setDuration(DRAG_LENGTH) |
| .scaleX(1) |
| .scaleY(1); |
| mTileView.findViewById(R.id.tile_label).animate() |
| .setDuration(DRAG_LENGTH) |
| .alpha(1); |
| mTileView.getAppLabel().animate() |
| .setDuration(DRAG_LENGTH) |
| .alpha(.6f); |
| } |
| } |
| |
| private final SpanSizeLookup mSizeLookup = new SpanSizeLookup() { |
| @Override |
| public int getSpanSize(int position) { |
| final int type = getItemViewType(position); |
| return type == TYPE_EDIT || type == TYPE_DIVIDER || type == TYPE_HEADER ? 3 : 1; |
| } |
| }; |
| |
| private class TileItemDecoration extends ItemDecoration { |
| private final Drawable mDrawable; |
| |
| private TileItemDecoration(Context context) { |
| mDrawable = context.getDrawable(R.drawable.qs_customize_tile_decoration); |
| } |
| |
| |
| @Override |
| public void onDraw(Canvas c, RecyclerView parent, State state) { |
| super.onDraw(c, parent, state); |
| |
| final int childCount = parent.getChildCount(); |
| final int width = parent.getWidth(); |
| final int bottom = parent.getBottom(); |
| for (int i = 0; i < childCount; i++) { |
| final View child = parent.getChildAt(i); |
| final ViewHolder holder = parent.getChildViewHolder(child); |
| if (holder.getAdapterPosition() == 0 || |
| holder.getAdapterPosition() < mEditIndex && !(child instanceof TextView)) { |
| continue; |
| } |
| |
| final RecyclerView.LayoutParams params = (RecyclerView.LayoutParams) child |
| .getLayoutParams(); |
| final int top = child.getTop() + params.topMargin + |
| Math.round(ViewCompat.getTranslationY(child)); |
| // Draw full width, in case there aren't tiles all the way across. |
| mDrawable.setBounds(0, top, width, bottom); |
| mDrawable.draw(c); |
| break; |
| } |
| } |
| } |
| |
| private final ItemTouchHelper.Callback mCallbacks = new ItemTouchHelper.Callback() { |
| |
| @Override |
| public boolean isLongPressDragEnabled() { |
| return true; |
| } |
| |
| @Override |
| public boolean isItemViewSwipeEnabled() { |
| return false; |
| } |
| |
| @Override |
| public void onSelectedChanged(ViewHolder viewHolder, int actionState) { |
| super.onSelectedChanged(viewHolder, actionState); |
| if (actionState != ItemTouchHelper.ACTION_STATE_DRAG) { |
| viewHolder = null; |
| } |
| if (viewHolder == mCurrentDrag) return; |
| if (mCurrentDrag != null) { |
| int position = mCurrentDrag.getAdapterPosition(); |
| if (position == RecyclerView.NO_POSITION) return; |
| TileInfo info = mTiles.get(position); |
| mCurrentDrag.mTileView.setShowAppLabel( |
| position > mEditIndex && !info.isSystem); |
| mCurrentDrag.stopDrag(); |
| mCurrentDrag = null; |
| } |
| if (viewHolder != null) { |
| mCurrentDrag = (Holder) viewHolder; |
| mCurrentDrag.startDrag(); |
| } |
| mHandler.post(new Runnable() { |
| @Override |
| public void run() { |
| notifyItemChanged(mEditIndex); |
| } |
| }); |
| } |
| |
| @Override |
| public boolean canDropOver(RecyclerView recyclerView, ViewHolder current, |
| ViewHolder target) { |
| final int position = target.getAdapterPosition(); |
| if (position == 0 || position == RecyclerView.NO_POSITION){ |
| return false; |
| } |
| if (!canRemoveTiles() && current.getAdapterPosition() < mEditIndex) { |
| return position < mEditIndex; |
| } |
| return position <= mEditIndex + 1; |
| } |
| |
| @Override |
| public int getMovementFlags(RecyclerView recyclerView, ViewHolder viewHolder) { |
| switch (viewHolder.getItemViewType()) { |
| case TYPE_EDIT: |
| case TYPE_DIVIDER: |
| case TYPE_HEADER: |
| // Fall through |
| return makeMovementFlags(0, 0); |
| default: |
| int dragFlags = ItemTouchHelper.UP | ItemTouchHelper.DOWN |
| | ItemTouchHelper.RIGHT | ItemTouchHelper.LEFT; |
| return makeMovementFlags(dragFlags, 0); |
| } |
| } |
| |
| @Override |
| public boolean onMove(RecyclerView recyclerView, ViewHolder viewHolder, ViewHolder target) { |
| int from = viewHolder.getAdapterPosition(); |
| int to = target.getAdapterPosition(); |
| if (from == 0 || from == RecyclerView.NO_POSITION || |
| to == 0 || to == RecyclerView.NO_POSITION) { |
| return false; |
| } |
| return move(from, to, target.itemView); |
| } |
| |
| @Override |
| public void onSwiped(ViewHolder viewHolder, int direction) { |
| } |
| }; |
| } |