676 lines
23 KiB
Java
676 lines
23 KiB
Java
/*
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* Copyright (C) 2015 Hippo Seven
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package com.hippo.easyrecyclerview;
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import android.content.Context;
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import android.os.Parcel;
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import android.os.Parcelable;
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import android.util.AttributeSet;
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import android.util.SparseBooleanArray;
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import android.view.ActionMode;
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import android.view.Menu;
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import android.view.MenuItem;
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import android.view.View;
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import android.widget.Checkable;
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import androidx.annotation.NonNull;
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import androidx.collection.LongSparseArray;
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import androidx.recyclerview.widget.RecyclerView;
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import com.hippo.yorozuya.NumberUtils;
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/**
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* Add setChoiceMode for RecyclerView
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*/
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// Get some code from twoway-view and AbsListView.
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public class EasyRecyclerView extends RecyclerView {
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/**
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* Normal list that does not indicate choices
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*/
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public static final int CHOICE_MODE_NONE = 0;
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/**
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* The list allows up to one choice
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*/
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public static final int CHOICE_MODE_SINGLE = 1;
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/**
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* The list allows multiple choices
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*/
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public static final int CHOICE_MODE_MULTIPLE = 2;
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/**
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* The list allows multiple choices in a modal selection mode
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*/
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public static final int CHOICE_MODE_MULTIPLE_MODAL = 3;
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/**
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* The list allows multiple choices in custom action
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*/
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public static final int CHOICE_MODE_MULTIPLE_CUSTOM = 4;
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// Fling friction
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public float pageScrollThreshold;
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/**
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* Wrapper for the multiple choice mode callback; AbsListView needs to perform
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* a few extra actions around what application code does.
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*/
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MultiChoiceModeWrapper mMultiChoiceModeCallback;
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/**
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* Controls if/how the user may choose/check items in the list
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*/
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private int mChoiceMode = CHOICE_MODE_NONE;
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/**
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* Controls CHOICE_MODE_MULTIPLE_MODAL. null when inactive.
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*/
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private ActionMode mChoiceActionMode;
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/**
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* Listener for custom multiple choices
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*/
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private CustomChoiceListener mCustomChoiceListener;
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private boolean mCustomChoice = false;
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/**
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* A lock, avoid OutOfCustomChoiceMode when doing OutOfCustomChoiceMode
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*/
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private boolean mOutOfCustomChoiceModing = false;
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private SparseBooleanArray mTempCheckStates;
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/**
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* Running count of how many items are currently checked
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*/
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private int mCheckedItemCount;
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/**
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* Running state of which positions are currently checked
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*/
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private SparseBooleanArray mCheckStates;
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/**
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* Running state of which IDs are currently checked.
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* If there is a value for a given key, the checked state for that ID is true
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* and the value holds the last known position in the adapter for that id.
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*/
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private LongSparseArray<Integer> mCheckedIdStates;
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private Adapter<?> mAdapter;
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public EasyRecyclerView(Context context) {
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super(context);
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EasyRecyclerView.this.init(context);
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}
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public EasyRecyclerView(Context context, AttributeSet attrs) {
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super(context, attrs);
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EasyRecyclerView.this.init(context);
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}
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public EasyRecyclerView(Context context, AttributeSet attrs, int defStyle) {
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super(context, attrs, defStyle);
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EasyRecyclerView.this.init(context);
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}
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public static void setViewChecked(View view, boolean checked) {
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if (view instanceof Checkable) {
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((Checkable) view).setChecked(checked);
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} else {
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view.setActivated(checked);
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}
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}
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/**
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* {@inheritDoc}
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*/
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@Override
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public void setAdapter(RecyclerView.Adapter adapter) {
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super.setAdapter(adapter);
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mAdapter = adapter;
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if (adapter != null) {
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if (mChoiceMode != CHOICE_MODE_NONE && adapter.hasStableIds() &&
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mCheckedIdStates == null) {
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mCheckedIdStates = new LongSparseArray<>();
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}
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}
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if (mCheckStates != null) {
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mCheckStates.clear();
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}
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if (mCheckedIdStates != null) {
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mCheckedIdStates.clear();
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}
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}
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@Override
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public void onChildAttachedToWindow(@NonNull View child) {
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super.onChildAttachedToWindow(child);
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if (mCheckStates != null) {
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int position = getChildAdapterPosition(child);
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if (position >= 0) {
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setViewChecked(child, mCheckStates.get(position));
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}
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}
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}
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public int getCheckedItemCount() {
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return mCheckedItemCount;
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}
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/**
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* Returns the checked state of the specified position. The result is only
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* valid if the choice mode has been set to {@link #CHOICE_MODE_SINGLE}
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* or {@link #CHOICE_MODE_MULTIPLE}.
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*
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* @param position The item whose checked state to return
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* @return The item's checked state or <code>false</code> if choice mode
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* is invalid
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* @see #setChoiceMode(int)
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*/
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public boolean isItemChecked(int position) {
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//noinspection SimplifiableIfStatement
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if (mChoiceMode != CHOICE_MODE_NONE && mCheckStates != null) {
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return mCheckStates.get(position);
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}
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return false;
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}
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/**
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* Returns the set of checked items in the list. The result is only valid if
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* the choice mode has not been set to {@link #CHOICE_MODE_NONE}.
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*
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* @return A SparseBooleanArray which will return true for each call to
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* get(int position) where position is a checked position in the
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* list and false otherwise, or <code>null</code> if the choice
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* mode is set to {@link #CHOICE_MODE_NONE}.
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*/
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public SparseBooleanArray getCheckedItemPositions() {
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if (mChoiceMode != CHOICE_MODE_NONE) {
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return mCheckStates;
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}
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return null;
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}
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public boolean isInCustomChoice() {
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return mCustomChoice;
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}
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public void intoCustomChoiceMode() {
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if (mChoiceMode == CHOICE_MODE_MULTIPLE_CUSTOM && !mCustomChoice) {
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mCustomChoice = true;
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mCustomChoiceListener.onIntoCustomChoice(this);
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}
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}
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public void outOfCustomChoiceMode() {
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if (mChoiceMode == CHOICE_MODE_MULTIPLE_CUSTOM && mCustomChoice && !mOutOfCustomChoiceModing) {
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mOutOfCustomChoiceModing = true;
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// Copy mCheckStates
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mTempCheckStates.clear();
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for (int i = 0, n = mCheckStates.size(); i < n; i++) {
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mTempCheckStates.put(mCheckStates.keyAt(i), mCheckStates.valueAt(i));
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}
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// Uncheck remain checked items
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for (int i = 0, n = mTempCheckStates.size(); i < n; i++) {
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if (mTempCheckStates.valueAt(i)) {
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setItemChecked(mTempCheckStates.keyAt(i), false);
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}
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}
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mCustomChoice = false;
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mCustomChoiceListener.onOutOfCustomChoice(this);
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mOutOfCustomChoiceModing = false;
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}
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}
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/**
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* Clear any choices previously set
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*/
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private void clearChoices() {
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if (mCheckStates != null) {
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mCheckStates.clear();
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}
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if (mCheckedIdStates != null) {
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mCheckedIdStates.clear();
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}
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mCheckedItemCount = 0;
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updateOnScreenCheckedViews();
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}
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/**
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* Sets all items checked.
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*/
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public void checkAll() {
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if (mChoiceMode == CHOICE_MODE_NONE || mChoiceMode == CHOICE_MODE_SINGLE) {
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return;
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}
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// Check is intoCheckMode
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if (mChoiceMode == CHOICE_MODE_MULTIPLE_CUSTOM && !mCustomChoice) {
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throw new IllegalStateException("Call intoCheckMode first");
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}
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// Start selection mode if needed. We don't need to if we're unchecking something.
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if (mChoiceMode == CHOICE_MODE_MULTIPLE_MODAL && mChoiceActionMode == null) {
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if (mMultiChoiceModeCallback == null ||
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!mMultiChoiceModeCallback.hasWrappedCallback()) {
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throw new IllegalStateException("EasyRecyclerView: attempted to start selection mode " +
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"for CHOICE_MODE_MULTIPLE_MODAL but no choice mode callback was " +
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"supplied. Call setMultiChoiceModeListener to set a callback.");
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}
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mChoiceActionMode = startActionMode(mMultiChoiceModeCallback);
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}
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for (int i = 0, n = mAdapter.getItemCount(); i < n; i++) {
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boolean oldValue = mCheckStates.get(i);
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mCheckStates.put(i, true);
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if (mCheckedIdStates != null && mAdapter.hasStableIds()) {
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mCheckedIdStates.put(mAdapter.getItemId(i), i);
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}
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if (!oldValue) {
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mCheckedItemCount++;
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}
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if (mChoiceActionMode != null) {
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final long id = mAdapter.getItemId(i);
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mMultiChoiceModeCallback.onItemCheckedStateChanged(mChoiceActionMode, i, id, true);
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}
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if (mChoiceMode == CHOICE_MODE_MULTIPLE_CUSTOM) {
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final long id = mAdapter.getItemId(i);
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mCustomChoiceListener.onItemCheckedStateChanged(this, i, id, true);
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}
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}
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updateOnScreenCheckedViews();
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}
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public void toggleItemChecked(int position) {
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if (mCheckStates != null) {
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setItemChecked(position, !mCheckStates.get(position));
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}
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}
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/**
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* Sets the checked state of the specified position. The is only valid if
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* the choice mode has been set to {@link #CHOICE_MODE_SINGLE} or
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* {@link #CHOICE_MODE_MULTIPLE}.
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*
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* @param position The item whose checked state is to be checked
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* @param value The new checked state for the item
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*/
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public void setItemChecked(int position, boolean value) {
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if (mChoiceMode == CHOICE_MODE_NONE) {
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return;
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}
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// Check is intoCheckMode
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if (mChoiceMode == CHOICE_MODE_MULTIPLE_CUSTOM && !mCustomChoice) {
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throw new IllegalStateException("Call intoCheckMode first");
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}
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// Start selection mode if needed. We don't need to if we're unchecking something.
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if (value && mChoiceMode == CHOICE_MODE_MULTIPLE_MODAL && mChoiceActionMode == null) {
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if (mMultiChoiceModeCallback == null ||
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!mMultiChoiceModeCallback.hasWrappedCallback()) {
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throw new IllegalStateException("EasyRecyclerView: attempted to start selection mode " +
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"for CHOICE_MODE_MULTIPLE_MODAL but no choice mode callback was " +
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"supplied. Call setMultiChoiceModeListener to set a callback.");
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}
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mChoiceActionMode = startActionMode(mMultiChoiceModeCallback);
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}
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if (mChoiceMode == CHOICE_MODE_MULTIPLE || mChoiceMode == CHOICE_MODE_MULTIPLE_MODAL || mChoiceMode == CHOICE_MODE_MULTIPLE_CUSTOM) {
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boolean oldValue = mCheckStates.get(position);
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mCheckStates.put(position, value);
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if (mCheckedIdStates != null && mAdapter.hasStableIds()) {
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if (value) {
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mCheckedIdStates.put(mAdapter.getItemId(position), position);
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} else {
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mCheckedIdStates.remove(mAdapter.getItemId(position));
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}
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}
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if (oldValue != value) {
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if (value) {
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mCheckedItemCount++;
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} else {
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mCheckedItemCount--;
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}
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}
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if (mChoiceActionMode != null) {
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final long id = mAdapter.getItemId(position);
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mMultiChoiceModeCallback.onItemCheckedStateChanged(mChoiceActionMode,
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position, id, value);
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}
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if (mChoiceMode == CHOICE_MODE_MULTIPLE_CUSTOM) {
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final long id = mAdapter.getItemId(position);
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mCustomChoiceListener.onItemCheckedStateChanged(this, position, id, value);
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}
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} else {
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boolean updateIds = mCheckedIdStates != null && mAdapter.hasStableIds();
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// Clear all values if we're checking something, or unchecking the currently
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// selected item
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if (value || isItemChecked(position)) {
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mCheckStates.clear();
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if (updateIds) {
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mCheckedIdStates.clear();
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}
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}
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// this may end up selecting the value we just cleared but this way
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// we ensure length of mCheckStates is 1, a fact getCheckedItemPosition relies on
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if (value) {
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mCheckStates.put(position, true);
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if (updateIds) {
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mCheckedIdStates.put(mAdapter.getItemId(position), position);
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}
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mCheckedItemCount = 1;
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} else if (mCheckStates.size() == 0 || !mCheckStates.valueAt(0)) {
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mCheckedItemCount = 0;
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}
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}
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updateOnScreenCheckedViews();
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}
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/**
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* Defines the choice behavior for the List. By default, Lists do not have any choice behavior
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* ({@link #CHOICE_MODE_NONE}). By setting the choiceMode to {@link #CHOICE_MODE_SINGLE}, the
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* List allows up to one item to be in a chosen state. By setting the choiceMode to
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* {@link #CHOICE_MODE_MULTIPLE}, the list allows any number of items to be chosen.
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*
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* @param choiceMode One of {@link #CHOICE_MODE_NONE}, {@link #CHOICE_MODE_SINGLE}, or
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* {@link #CHOICE_MODE_MULTIPLE}
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*/
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public void setChoiceMode(int choiceMode) {
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mChoiceMode = choiceMode;
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if (mChoiceActionMode != null) {
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mChoiceActionMode.finish();
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mChoiceActionMode = null;
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}
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if (mChoiceMode != CHOICE_MODE_NONE) {
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if (mCheckStates == null) {
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mCheckStates = new SparseBooleanArray(0);
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}
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if (mCheckedIdStates == null && mAdapter != null && mAdapter.hasStableIds()) {
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mCheckedIdStates = new LongSparseArray<>(0);
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}
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// Modal multi-choice mode only has choices when the mode is active. Clear them.
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if (mChoiceMode == CHOICE_MODE_MULTIPLE_MODAL) {
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clearChoices();
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setLongClickable(true);
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} else if (mChoiceMode == CHOICE_MODE_MULTIPLE_CUSTOM) {
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if (mTempCheckStates == null) {
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mTempCheckStates = new SparseBooleanArray(0);
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}
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clearChoices();
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}
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}
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}
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public void setCustomCheckedListener(CustomChoiceListener listener) {
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mCustomChoiceListener = listener;
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}
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/**
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* Perform a quick, in-place update of the checked or activated state
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* on all visible item views. This should only be called when a valid
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* choice mode is active.
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*/
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private void updateOnScreenCheckedViews() {
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final int count = getChildCount();
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for (int i = 0; i < count; i++) {
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final View child = getChildAt(i);
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final int position = getChildAdapterPosition(child);
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setViewChecked(child, mCheckStates.get(position));
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}
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}
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private void init(Context context) {
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float scale = context.getResources().getDisplayMetrics().density;
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// g (m/s^2)
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// inch/meter
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// A context-specific coefficient adjusted to physical values.
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// look and feel tuning
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pageScrollThreshold = scale * 80;
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}
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@Override
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public Parcelable onSaveInstanceState() {
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final SavedState ss = new SavedState(super.onSaveInstanceState());
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ss.choiceMode = mChoiceMode;
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ss.customChoice = mCustomChoice;
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ss.checkedItemCount = mCheckedItemCount;
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ss.checkState = mCheckStates;
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ss.checkIdState = mCheckedIdStates;
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return ss;
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}
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@Override
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public void onRestoreInstanceState(Parcelable state) {
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SavedState ss = (SavedState) state;
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super.onRestoreInstanceState(ss.getSuperState());
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setChoiceMode(ss.choiceMode);
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mCustomChoice = ss.customChoice;
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mCheckedItemCount = ss.checkedItemCount;
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if (ss.checkState != null) {
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mCheckStates = ss.checkState;
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}
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if (ss.checkIdState != null) {
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mCheckedIdStates = ss.checkIdState;
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}
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if (mChoiceMode == CHOICE_MODE_MULTIPLE_MODAL && mCheckedItemCount > 0) {
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mChoiceActionMode = startActionMode(mMultiChoiceModeCallback);
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}
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updateOnScreenCheckedViews();
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}
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/**
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* A MultiChoiceModeListener receives events for {@link android.widget.AbsListView#CHOICE_MODE_MULTIPLE_MODAL}.
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* It acts as the {@link android.view.ActionMode.Callback} for the selection mode and also receives
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* {@link #onItemCheckedStateChanged(android.view.ActionMode, int, long, boolean)} events when the user
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* selects and deselects list items.
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*/
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public interface MultiChoiceModeListener extends ActionMode.Callback {
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/**
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* Called when an item is checked or unchecked during selection mode.
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*
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* @param mode The {@link android.view.ActionMode} providing the selection mode
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* @param position Adapter position of the item that was checked or unchecked
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* @param id Adapter ID of the item that was checked or unchecked
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* @param checked <code>true</code> if the item is now checked, <code>false</code>
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* if the item is now unchecked.
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*/
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void onItemCheckedStateChanged(ActionMode mode,
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int position, long id, boolean checked);
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}
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/**
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* Custom checked
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*/
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public interface CustomChoiceListener {
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void onIntoCustomChoice(EasyRecyclerView view);
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void onOutOfCustomChoice(EasyRecyclerView view);
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void onItemCheckedStateChanged(EasyRecyclerView view, int position, long id, boolean checked);
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}
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/**
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* This saved state class is a Parcelable and should not extend
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* {@link android.view.View.BaseSavedState} nor {@link android.view.AbsSavedState}
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* because its super class AbsSavedState's constructor
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* currently passes null
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* as a class loader to read its superstate from Parcelable.
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* This causes {@link android.os.BadParcelableException} when restoring saved states.
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* <p/>
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* The super class "RecyclerView" is a part of the support library,
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* and restoring its saved state requires the class loader that loaded the RecyclerView.
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* It seems that the class loader is not required when restoring from RecyclerView itself,
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* but it is required when restoring from RecyclerView's subclasses.
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*/
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static class SavedState implements Parcelable {
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public static final SavedState EMPTY_STATE = new SavedState() {
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};
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public static final Parcelable.Creator<SavedState> CREATOR
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= new Parcelable.Creator<SavedState>() {
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@Override
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public SavedState createFromParcel(Parcel in) {
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return new SavedState(in);
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}
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@Override
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public SavedState[] newArray(int size) {
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return new SavedState[size];
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}
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};
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int choiceMode;
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boolean customChoice;
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int checkedItemCount;
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SparseBooleanArray checkState;
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LongSparseArray<Integer> checkIdState;
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// This keeps the parent(RecyclerView)'s state
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Parcelable mSuperState;
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SavedState() {
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mSuperState = null;
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}
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/**
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* Constructor called from {@link #onSaveInstanceState()}
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*/
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SavedState(Parcelable superState) {
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mSuperState = superState != EMPTY_STATE ? superState : null;
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}
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/**
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* Constructor called from {@link #CREATOR}
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*/
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private SavedState(Parcel in) {
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// Parcel 'in' has its parent(RecyclerView)'s saved state.
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// To restore it, class loader that loaded RecyclerView is required.
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Parcelable superState = in.readParcelable(RecyclerView.class.getClassLoader());
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mSuperState = superState != null ? superState : EMPTY_STATE;
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choiceMode = in.readInt();
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customChoice = NumberUtils.int2boolean(in.readInt());
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checkedItemCount = in.readInt();
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checkState = in.readSparseBooleanArray();
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final int N = in.readInt();
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if (N > 0) {
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checkIdState = new LongSparseArray<>();
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for (int i = 0; i < N; i++) {
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final long key = in.readLong();
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final int value = in.readInt();
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checkIdState.put(key, value);
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}
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}
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}
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|
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@Override
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public int describeContents() {
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return 0;
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}
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|
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@Override
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public void writeToParcel(@NonNull Parcel out, int flags) {
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out.writeParcelable(mSuperState, flags);
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|
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out.writeInt(choiceMode);
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out.writeInt(NumberUtils.boolean2int(customChoice));
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out.writeInt(checkedItemCount);
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out.writeSparseBooleanArray(checkState);
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final int N = checkIdState != null ? checkIdState.size() : 0;
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out.writeInt(N);
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for (int i = 0; i < N; i++) {
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out.writeLong(checkIdState.keyAt(i));
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out.writeInt(checkIdState.valueAt(i));
|
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}
|
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}
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|
|
public Parcelable getSuperState() {
|
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return mSuperState;
|
|
}
|
|
}
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|
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class MultiChoiceModeWrapper implements MultiChoiceModeListener {
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private MultiChoiceModeListener mWrapped;
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|
|
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@SuppressWarnings("BooleanMethodIsAlwaysInverted")
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public boolean hasWrappedCallback() {
|
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return mWrapped != null;
|
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}
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|
|
|
@Override
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public boolean onCreateActionMode(ActionMode mode, Menu menu) {
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if (mWrapped.onCreateActionMode(mode, menu)) {
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// Initialize checked graphic state?
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setLongClickable(false);
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|
return true;
|
|
}
|
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return false;
|
|
}
|
|
|
|
@Override
|
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public boolean onPrepareActionMode(ActionMode mode, Menu menu) {
|
|
return mWrapped.onPrepareActionMode(mode, menu);
|
|
}
|
|
|
|
@Override
|
|
public boolean onActionItemClicked(ActionMode mode, MenuItem item) {
|
|
return mWrapped.onActionItemClicked(mode, item);
|
|
}
|
|
|
|
@Override
|
|
public void onDestroyActionMode(ActionMode mode) {
|
|
mWrapped.onDestroyActionMode(mode);
|
|
mChoiceActionMode = null;
|
|
|
|
// Ending selection mode means deselecting everything.
|
|
clearChoices();
|
|
|
|
requestLayout();
|
|
|
|
setLongClickable(true);
|
|
}
|
|
|
|
@Override
|
|
public void onItemCheckedStateChanged(ActionMode mode,
|
|
int position, long id, boolean checked) {
|
|
mWrapped.onItemCheckedStateChanged(mode, position, id, checked);
|
|
|
|
// If there are no items selected we no longer need the selection mode.
|
|
if (getCheckedItemCount() == 0) {
|
|
mode.finish();
|
|
}
|
|
}
|
|
}
|
|
}
|