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 com.example.android.supportv7.R; 20import com.example.android.supportv7.widget.util.ConfigToggle; 21 22import android.annotation.TargetApi; 23import android.os.Build; 24import android.support.v4.content.ContextCompat; 25import android.support.v4.view.MotionEventCompat; 26import android.support.v7.widget.RecyclerView; 27import android.support.v7.widget.helper.ItemTouchHelper; 28import android.view.MotionEvent; 29import android.view.View; 30import android.view.ViewGroup; 31 32public class DragAndDropActivity extends ItemTouchHelperActivity { 33 34 boolean mDragUpEnabled = true; 35 boolean mDragDownEnabled = true; 36 boolean mLongPressDragEnabled = true; 37 38 @Override 39 ConfigToggle[] createConfigToggles() { 40 return new ConfigToggle[]{ 41 new ConfigToggle(this, R.string.drag_up) { 42 @Override 43 public boolean isChecked() { 44 return mDragUpEnabled; 45 } 46 47 @Override 48 public void onChange(boolean newValue) { 49 mDragUpEnabled = newValue; 50 } 51 }, 52 new ConfigToggle(this, R.string.drag_down) { 53 @Override 54 public boolean isChecked() { 55 return mDragDownEnabled; 56 } 57 58 @Override 59 public void onChange(boolean newValue) { 60 mDragDownEnabled = newValue; 61 } 62 }, 63 new ConfigToggle(this, R.string.long_press_drag) { 64 @Override 65 public boolean isChecked() { 66 return mLongPressDragEnabled; 67 } 68 69 @Override 70 public void onChange(boolean newValue) { 71 mLongPressDragEnabled = newValue; 72 mAdapter.notifyDataSetChanged(); 73 } 74 } 75 }; 76 } 77 78 @Override 79 public boolean isLongPressDragEnabled() { 80 return mLongPressDragEnabled; 81 } 82 83 @Override 84 public void onBind(ItemTouchViewHolder viewHolder) { 85 super.onBind(viewHolder); 86 viewHolder.actionButton.setVisibility(mLongPressDragEnabled ? View.GONE : View.VISIBLE); 87 } 88 89 @Override 90 public void clearView(RecyclerView.ViewHolder viewHolder) { 91 super.clearView(viewHolder); 92 ItemTouchViewHolder touchVH = (ItemTouchViewHolder) viewHolder; 93 touchVH.cardView.setCardBackgroundColor( 94 ContextCompat.getColor(this, android.R.color.white)); 95 touchVH.overlay.setVisibility(View.GONE); 96 } 97 98 @Override 99 public void onSelectedChanged(RecyclerView.ViewHolder viewHolder, int actionState) { 100 ItemTouchViewHolder touchVH = (ItemTouchViewHolder) viewHolder; 101 if (actionState != ItemTouchHelper.ACTION_STATE_IDLE) { 102 touchVH.cardView.setCardBackgroundColor( 103 ContextCompat.getColor(this, R.color.card_aquatic)); 104 } 105 super.onSelectedChanged(viewHolder, actionState); 106 } 107 108 @Override 109 public ItemTouchViewHolder onCreateViewHolder(ViewGroup parent) { 110 final ItemTouchViewHolder vh = super.onCreateViewHolder(parent); 111 vh.actionButton.setText(R.string.drag); 112 vh.actionButton.setOnTouchListener(new View.OnTouchListener() { 113 @Override 114 public boolean onTouch(View v, MotionEvent event) { 115 if (MotionEventCompat.getActionMasked(event) == MotionEvent.ACTION_DOWN) { 116 mItemTouchHelper.startDrag(vh); 117 } 118 return false; 119 } 120 }); 121 return vh; 122 } 123 124 @Override 125 public int getMovementFlags(RecyclerView recyclerView, RecyclerView.ViewHolder viewHolder) { 126 return mCallback.makeMovementFlags( 127 (mDragUpEnabled ? ItemTouchHelper.UP : 0) | 128 (mDragDownEnabled ? ItemTouchHelper.DOWN : 0), 0); 129 } 130} 131