1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
|
/*
* Copyright (C) 2019 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.quickstep;
import android.view.LayoutInflater;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.ViewGroup;
import android.widget.Button;
import androidx.annotation.NonNull;
import androidx.recyclerview.widget.RecyclerView.Adapter;
import androidx.recyclerview.widget.RecyclerView.ViewHolder;
import com.android.launcher3.R;
import com.android.quickstep.views.TaskItemView;
import com.android.systemui.shared.recents.model.Task;
import java.util.List;
import java.util.Objects;
import java.util.Optional;
/**
* Recycler view adapter that dynamically inflates and binds {@link TaskHolder} instances with the
* appropriate {@link Task} from the recents task list.
*/
public final class TaskAdapter extends Adapter<ViewHolder> {
public static final int CHANGE_EVENT_TYPE_EMPTY_TO_CONTENT = 0;
public static final int MAX_TASKS_TO_DISPLAY = 6;
public static final int TASKS_START_POSITION = 1;
public static final int ITEM_TYPE_TASK = 0;
public static final int ITEM_TYPE_CLEAR_ALL = 1;
private static final String TAG = "TaskAdapter";
private final TaskListLoader mLoader;
private TaskActionController mTaskActionController;
private OnClickListener mClearAllListener;
private boolean mIsShowingLoadingUi;
public TaskAdapter(@NonNull TaskListLoader loader) {
mLoader = loader;
}
public void setActionController(TaskActionController taskActionController) {
mTaskActionController = taskActionController;
}
public void setOnClearAllClickListener(OnClickListener listener) {
mClearAllListener = listener;
}
/**
* Sets all positions in the task adapter to loading views, binding new views if necessary.
* This changes the task adapter's view of the data, so the appropriate notify events should be
* called in addition to this method to reflect the changes.
*
* @param isShowingLoadingUi true to bind loading task views to all positions, false to return
* to the real data
*/
public void setIsShowingLoadingUi(boolean isShowingLoadingUi) {
mIsShowingLoadingUi = isShowingLoadingUi;
}
@Override
public ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
switch (viewType) {
case ITEM_TYPE_TASK:
TaskItemView itemView = (TaskItemView) LayoutInflater.from(parent.getContext())
.inflate(R.layout.task_item_view, parent, false);
TaskHolder taskHolder = new TaskHolder(itemView);
itemView.setOnClickListener(
view -> mTaskActionController.launchTaskFromView(taskHolder));
return taskHolder;
case ITEM_TYPE_CLEAR_ALL:
View clearView = LayoutInflater.from(parent.getContext())
.inflate(R.layout.clear_all_button, parent, false);
ClearAllHolder clearAllHolder = new ClearAllHolder(clearView);
Button clearViewButton = clearView.findViewById(R.id.clear_all_button);
clearViewButton.setOnClickListener(mClearAllListener);
return clearAllHolder;
default:
throw new IllegalArgumentException("No known holder for item type: " + viewType);
}
}
@Override
public void onBindViewHolder(ViewHolder holder, int position) {
onBindViewHolderInternal(holder, position, false /* willAnimate */);
}
@Override
public void onBindViewHolder(@NonNull ViewHolder holder, int position,
@NonNull List<Object> payloads) {
if (payloads.isEmpty()) {
super.onBindViewHolder(holder, position, payloads);
return;
}
int changeType = (int) payloads.get(0);
if (changeType == CHANGE_EVENT_TYPE_EMPTY_TO_CONTENT) {
// Bind in preparation for animation
onBindViewHolderInternal(holder, position, true /* willAnimate */);
} else {
throw new IllegalArgumentException("Payload content is not a valid change event type: "
+ changeType);
}
}
private void onBindViewHolderInternal(@NonNull ViewHolder holder, int position,
boolean willAnimate) {
int itemType = getItemViewType(position);
switch (itemType) {
case ITEM_TYPE_TASK:
TaskHolder taskHolder = (TaskHolder) holder;
if (mIsShowingLoadingUi) {
taskHolder.bindEmptyUi();
return;
}
List<Task> tasks = mLoader.getCurrentTaskList();
int taskPos = position - TASKS_START_POSITION;
if (taskPos >= tasks.size()) {
// Task list has updated.
return;
}
Task task = tasks.get(taskPos);
taskHolder.bindTask(task, willAnimate /* willAnimate */);
mLoader.loadTaskIconAndLabel(task, () -> {
// Ensure holder still has the same task.
if (Objects.equals(Optional.of(task), taskHolder.getTask())) {
taskHolder.getTaskItemView().setIcon(task.icon);
taskHolder.getTaskItemView().setLabel(task.titleDescription);
}
});
mLoader.loadTaskThumbnail(task, () -> {
if (Objects.equals(Optional.of(task), taskHolder.getTask())) {
taskHolder.getTaskItemView().setThumbnail(task.thumbnail);
}
});
break;
case ITEM_TYPE_CLEAR_ALL:
// Nothing to bind.
break;
default:
throw new IllegalArgumentException("No known holder for item type: " + itemType);
}
}
@Override
public int getItemViewType(int position) {
// Bottom is always clear all button.
return (position == 0) ? ITEM_TYPE_CLEAR_ALL : ITEM_TYPE_TASK;
}
@Override
public int getItemCount() {
int itemCount = TASKS_START_POSITION;
if (mIsShowingLoadingUi) {
// Show loading version of all items.
itemCount += MAX_TASKS_TO_DISPLAY;
} else {
itemCount += Math.min(mLoader.getCurrentTaskList().size(), MAX_TASKS_TO_DISPLAY);
}
return itemCount;
}
}
|
