| /* |
| * Copyright (C) 2015 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.example.android.supportv7.widget.touch; |
| |
| import com.example.android.supportv7.Cheeses; |
| import com.example.android.supportv7.R; |
| import com.example.android.supportv7.widget.util.ConfigToggle; |
| import com.example.android.supportv7.widget.util.ConfigViewHolder; |
| |
| import android.app.Activity; |
| import android.graphics.Canvas; |
| import android.os.Bundle; |
| import android.support.v7.widget.CardView; |
| import android.support.v7.widget.LinearLayoutManager; |
| import android.support.v7.widget.RecyclerView; |
| import android.support.v7.widget.helper.ItemTouchHelper; |
| import android.view.LayoutInflater; |
| import android.view.View; |
| import android.view.ViewGroup; |
| import android.widget.Button; |
| import android.widget.TextView; |
| |
| import java.util.ArrayList; |
| import java.util.Arrays; |
| import java.util.List; |
| |
| /** |
| * Sample activity from which ItemTouchHelper demo activities inherit. |
| */ |
| abstract public class ItemTouchHelperActivity extends Activity { |
| |
| public RecyclerView mRecyclerView; |
| |
| public ItemTouchAdapter mAdapter; |
| |
| public ItemTouchHelper mItemTouchHelper; |
| |
| public ItemTouchHelper.Callback mCallback; |
| |
| private ConfigToggle[] mConfigToggles; |
| |
| @Override |
| public void onCreate(Bundle savedInstanceState) { |
| super.onCreate(savedInstanceState); |
| setContentView(R.layout.activity_item_touch); |
| mRecyclerView = (RecyclerView) findViewById(R.id.recycler_view); |
| mRecyclerView.setHasFixedSize(true); |
| mAdapter = createAdapter(); |
| mRecyclerView.setAdapter(mAdapter); |
| mRecyclerView.setLayoutManager(new LinearLayoutManager(this)); |
| mItemTouchHelper = createItemTouchHelper(); |
| mItemTouchHelper.attachToRecyclerView(mRecyclerView); |
| initToggles(); |
| } |
| |
| private void initToggles() { |
| mConfigToggles = createConfigToggles(); |
| RecyclerView configView = (RecyclerView) findViewById(R.id.config_recycler_view); |
| configView.setAdapter(new RecyclerView.Adapter<ConfigViewHolder>() { |
| @Override |
| public ConfigViewHolder onCreateViewHolder(ViewGroup parent, int viewType) { |
| return new ConfigViewHolder(LayoutInflater.from(parent.getContext()) |
| .inflate(R.layout.config_view_toggle, parent, false)); |
| } |
| |
| @Override |
| public void onBindViewHolder(ConfigViewHolder holder, int position) { |
| ConfigToggle toggle = mConfigToggles[position]; |
| holder.bind(toggle); |
| } |
| |
| @Override |
| public int getItemCount() { |
| return mConfigToggles.length; |
| } |
| }); |
| configView.setLayoutManager(new LinearLayoutManager(this, LinearLayoutManager.HORIZONTAL, |
| false)); |
| configView.setHasFixedSize(true); |
| } |
| |
| abstract ConfigToggle[] createConfigToggles(); |
| |
| public ItemTouchHelper createItemTouchHelper() { |
| mCallback = createCallback(); |
| return new ItemTouchHelper(mCallback); |
| } |
| |
| public ItemTouchHelper.Callback createCallback() { |
| return new ItemTouchHelper.Callback() { |
| @Override |
| public int getMovementFlags(RecyclerView recyclerView, |
| RecyclerView.ViewHolder viewHolder) { |
| return ItemTouchHelperActivity.this.getMovementFlags(recyclerView, viewHolder); |
| } |
| |
| @Override |
| public boolean onMove(RecyclerView recyclerView, RecyclerView.ViewHolder viewHolder, |
| RecyclerView.ViewHolder target) { |
| mAdapter.move(viewHolder.getAdapterPosition(), target.getAdapterPosition()); |
| return true; |
| } |
| |
| @Override |
| public void onSwiped(RecyclerView.ViewHolder viewHolder, int direction) { |
| mAdapter.delete(viewHolder.getAdapterPosition()); |
| } |
| |
| @Override |
| public void onSelectedChanged(RecyclerView.ViewHolder viewHolder, int actionState) { |
| super.onSelectedChanged(viewHolder, actionState); |
| ItemTouchHelperActivity.this.onSelectedChanged(viewHolder, actionState); |
| } |
| |
| @Override |
| public void onChildDraw(Canvas c, RecyclerView recyclerView, |
| RecyclerView.ViewHolder viewHolder, |
| float dX, float dY, int actionState, boolean isCurrentlyActive) { |
| if (ItemTouchHelperActivity.this.onChildDraw(c, recyclerView, viewHolder, |
| dX, dY, actionState, isCurrentlyActive)) { |
| return; |
| } |
| super.onChildDraw(c, recyclerView, viewHolder, dX, dY, actionState, |
| isCurrentlyActive); |
| } |
| |
| @Override |
| public void onChildDrawOver(Canvas c, RecyclerView recyclerView, |
| RecyclerView.ViewHolder viewHolder, float dX, float dY, int actionState, |
| boolean isCurrentlyActive) { |
| if (ItemTouchHelperActivity.this.onChildDrawOver(c, recyclerView, viewHolder, |
| dX, dY, actionState, isCurrentlyActive)) { |
| return; |
| } |
| super.onChildDrawOver(c, recyclerView, viewHolder, dX, dY, actionState, |
| isCurrentlyActive); |
| } |
| |
| @Override |
| public boolean isLongPressDragEnabled() { |
| return ItemTouchHelperActivity.this.isLongPressDragEnabled(); |
| } |
| |
| @Override |
| public boolean isItemViewSwipeEnabled() { |
| return ItemTouchHelperActivity.this.isPointerSwipeEnabled(); |
| } |
| |
| @Override |
| public void clearView(RecyclerView recyclerView, RecyclerView.ViewHolder viewHolder) { |
| super.clearView(recyclerView, viewHolder); |
| ItemTouchHelperActivity.this.clearView(viewHolder); |
| } |
| }; |
| } |
| |
| /** |
| * @return True if we should NOT call parent |
| */ |
| public boolean onChildDraw(Canvas c, RecyclerView recyclerView, |
| RecyclerView.ViewHolder viewHolder, |
| float dX, float dY, int actionState, boolean isCurrentlyActive) { |
| return false; |
| } |
| |
| /** |
| * @return True if we should NOT call parent |
| */ |
| public boolean onChildDrawOver(Canvas c, RecyclerView recyclerView, |
| RecyclerView.ViewHolder viewHolder, float dX, float dY, int actionState, |
| boolean isCurrentlyActive) { |
| return false; |
| } |
| |
| public void clearView(RecyclerView.ViewHolder viewHolder) { |
| |
| } |
| |
| public void onSelectedChanged(RecyclerView.ViewHolder viewHolder, int actionState) { |
| |
| } |
| |
| public boolean isLongPressDragEnabled() { |
| return true; |
| } |
| |
| public boolean isPointerSwipeEnabled() { |
| return true; |
| } |
| |
| public ItemTouchViewHolder onCreateViewHolder(ViewGroup parent) { |
| ItemTouchViewHolder itemTouchViewHolder = new ItemTouchViewHolder( |
| LayoutInflater.from(parent.getContext()) |
| .inflate(R.layout.touch_item, parent, false)); |
| return itemTouchViewHolder; |
| } |
| |
| abstract public int getMovementFlags(RecyclerView recyclerView, |
| RecyclerView.ViewHolder viewHolder); |
| |
| public ItemTouchAdapter createAdapter() { |
| return new ItemTouchAdapter(); |
| } |
| |
| public void onBind(ItemTouchViewHolder viewHolder) { |
| |
| } |
| |
| public void onCreateViewHolder(ItemTouchViewHolder viewHolder) { |
| |
| } |
| |
| public class ItemTouchViewHolder extends RecyclerView.ViewHolder { |
| |
| public final TextView textView; |
| |
| public final Button actionButton; |
| |
| public final CardView cardView; |
| |
| public final View overlay; |
| |
| public ItemTouchViewHolder(View itemView) { |
| super(itemView); |
| cardView = (CardView) itemView; |
| textView = (TextView) itemView.findViewById(R.id.text_view); |
| actionButton = (Button) itemView.findViewById(R.id.action_button); |
| overlay = itemView.findViewById(R.id.overlay); |
| } |
| } |
| |
| public class ItemTouchAdapter extends RecyclerView.Adapter<ItemTouchViewHolder> { |
| |
| private List<String> mItems = new ArrayList<String>(); |
| |
| public ItemTouchAdapter() { |
| mItems.addAll(Arrays.asList(Cheeses.sCheeseStrings)); |
| } |
| |
| @Override |
| public ItemTouchViewHolder onCreateViewHolder(ViewGroup parent, int viewType) { |
| return ItemTouchHelperActivity.this.onCreateViewHolder(parent); |
| } |
| |
| @Override |
| public void onBindViewHolder(ItemTouchViewHolder holder, int position) { |
| holder.textView.setText(mItems.get(position)); |
| onBind(holder); |
| } |
| |
| public void delete(int position) { |
| mItems.remove(position); |
| notifyItemRemoved(position); |
| } |
| |
| public void move(int from, int to) { |
| String prev = mItems.remove(from); |
| mItems.add(to > from ? to - 1 : to, prev); |
| notifyItemMoved(from, to); |
| } |
| |
| @Override |
| public int getItemCount() { |
| return mItems.size(); |
| } |
| } |
| |
| |
| } |