1/* 2 * Copyright (C) 2015 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17package com.example.android.supportv7.widget.touch; 18 19import android.support.v4.content.ContextCompat; 20import android.support.v7.widget.RecyclerView; 21import android.support.v7.widget.helper.ItemTouchHelper; 22import android.view.MotionEvent; 23import android.view.View; 24import android.view.ViewGroup; 25 26import com.example.android.supportv7.R; 27import com.example.android.supportv7.widget.util.ConfigToggle; 28 29public class DragAndDropActivity extends ItemTouchHelperActivity { 30 31 boolean mDragUpEnabled = true; 32 boolean mDragDownEnabled = true; 33 boolean mLongPressDragEnabled = true; 34 35 @Override 36 ConfigToggle[] createConfigToggles() { 37 return new ConfigToggle[]{ 38 new ConfigToggle(this, R.string.drag_up) { 39 @Override 40 public boolean isChecked() { 41 return mDragUpEnabled; 42 } 43 44 @Override 45 public void onChange(boolean newValue) { 46 mDragUpEnabled = newValue; 47 } 48 }, 49 new ConfigToggle(this, R.string.drag_down) { 50 @Override 51 public boolean isChecked() { 52 return mDragDownEnabled; 53 } 54 55 @Override 56 public void onChange(boolean newValue) { 57 mDragDownEnabled = newValue; 58 } 59 }, 60 new ConfigToggle(this, R.string.long_press_drag) { 61 @Override 62 public boolean isChecked() { 63 return mLongPressDragEnabled; 64 } 65 66 @Override 67 public void onChange(boolean newValue) { 68 mLongPressDragEnabled = newValue; 69 mAdapter.notifyDataSetChanged(); 70 } 71 } 72 }; 73 } 74 75 @Override 76 public boolean isLongPressDragEnabled() { 77 return mLongPressDragEnabled; 78 } 79 80 @Override 81 public void onBind(ItemTouchViewHolder viewHolder) { 82 super.onBind(viewHolder); 83 viewHolder.actionButton.setVisibility(mLongPressDragEnabled ? View.GONE : View.VISIBLE); 84 } 85 86 @Override 87 public void clearView(RecyclerView.ViewHolder viewHolder) { 88 super.clearView(viewHolder); 89 ItemTouchViewHolder touchVH = (ItemTouchViewHolder) viewHolder; 90 touchVH.cardView.setCardBackgroundColor( 91 ContextCompat.getColor(this, android.R.color.white)); 92 touchVH.overlay.setVisibility(View.GONE); 93 } 94 95 @Override 96 public void onSelectedChanged(RecyclerView.ViewHolder viewHolder, int actionState) { 97 ItemTouchViewHolder touchVH = (ItemTouchViewHolder) viewHolder; 98 if (actionState != ItemTouchHelper.ACTION_STATE_IDLE) { 99 touchVH.cardView.setCardBackgroundColor( 100 ContextCompat.getColor(this, R.color.card_aquatic)); 101 } 102 super.onSelectedChanged(viewHolder, actionState); 103 } 104 105 @Override 106 public ItemTouchViewHolder onCreateViewHolder(ViewGroup parent) { 107 final ItemTouchViewHolder vh = super.onCreateViewHolder(parent); 108 vh.actionButton.setText(R.string.drag); 109 vh.actionButton.setOnTouchListener(new View.OnTouchListener() { 110 @Override 111 public boolean onTouch(View v, MotionEvent event) { 112 if (event.getActionMasked() == MotionEvent.ACTION_DOWN) { 113 mItemTouchHelper.startDrag(vh); 114 } 115 return false; 116 } 117 }); 118 return vh; 119 } 120 121 @Override 122 public int getMovementFlags(RecyclerView recyclerView, RecyclerView.ViewHolder viewHolder) { 123 return mCallback.makeMovementFlags( 124 (mDragUpEnabled ? ItemTouchHelper.UP : 0) | 125 (mDragDownEnabled ? ItemTouchHelper.DOWN : 0), 0); 126 } 127} 128