1+ /*
2+ * Copyright 2023 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+ * https://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+
17+ package com.example.platform.storage.storageaccessframework
18+
19+ import androidx.activity.compose.rememberLauncherForActivityResult
20+ import androidx.activity.result.contract.ActivityResultContracts
21+ import androidx.compose.foundation.layout.Box
22+ import androidx.compose.foundation.layout.fillMaxSize
23+ import androidx.compose.foundation.layout.padding
24+ import androidx.compose.foundation.layout.size
25+ import androidx.compose.foundation.layout.wrapContentSize
26+ import androidx.compose.foundation.lazy.LazyColumn
27+ import androidx.compose.foundation.lazy.items
28+ import androidx.compose.foundation.rememberScrollState
29+ import androidx.compose.material.icons.Icons
30+ import androidx.compose.material.icons.filled.Check
31+ import androidx.compose.material.icons.outlined.Check
32+ import androidx.compose.material3.DropdownMenu
33+ import androidx.compose.material3.DropdownMenuItem
34+ import androidx.compose.material3.ExtendedFloatingActionButton
35+ import androidx.compose.material3.HorizontalDivider
36+ import androidx.compose.material3.Icon
37+ import androidx.compose.material3.IconButton
38+ import androidx.compose.material3.ListItem
39+ import androidx.compose.material3.Scaffold
40+ import androidx.compose.material3.Switch
41+ import androidx.compose.material3.SwitchDefaults
42+ import androidx.compose.material3.Text
43+ import androidx.compose.runtime.Composable
44+ import androidx.compose.runtime.LaunchedEffect
45+ import androidx.compose.runtime.getValue
46+ import androidx.compose.runtime.mutableStateOf
47+ import androidx.compose.runtime.remember
48+ import androidx.compose.runtime.rememberCoroutineScope
49+ import androidx.compose.runtime.setValue
50+ import androidx.compose.ui.Alignment
51+ import androidx.compose.ui.Modifier
52+ import androidx.compose.ui.platform.LocalContext
53+ import androidx.compose.ui.res.painterResource
54+ import androidx.compose.ui.semantics.contentDescription
55+ import androidx.compose.ui.semantics.semantics
56+ import com.example.platform.storage.R
57+ import com.example.platform.storage.storageaccessframework.shared.AudioFileCard
58+ import com.example.platform.storage.storageaccessframework.shared.BinaryFileCard
59+ import com.example.platform.storage.storageaccessframework.shared.FileRecord
60+ import com.example.platform.storage.storageaccessframework.shared.FileType
61+ import com.example.platform.storage.storageaccessframework.shared.ImageFileCard
62+ import com.example.platform.storage.storageaccessframework.shared.PdfFileCard
63+ import com.example.platform.storage.storageaccessframework.shared.TextFileCard
64+ import com.example.platform.storage.storageaccessframework.shared.VideoFileCard
65+ import kotlinx.coroutines.launch
66+
67+ @Composable
68+ fun GetContentSample () {
69+ val coroutineScope = rememberCoroutineScope()
70+ val context = LocalContext .current
71+ var selectedFilter by remember { mutableStateOf(FileType .Any ) }
72+ var selectMultiple by remember { mutableStateOf(false ) }
73+ var expanded by remember { mutableStateOf(false ) }
74+ var selectedFiles by remember { mutableStateOf(emptyList<FileRecord >()) }
75+
76+ val getSingleDocument =
77+ rememberLauncherForActivityResult(ActivityResultContracts .GetContent ()) { uri ->
78+ coroutineScope.launch {
79+ selectedFiles = uri?.let { uri ->
80+ FileRecord .fromUri(uri, context)?.let { listOf (it) }
81+ } ? : emptyList()
82+ }
83+ }
84+
85+ val getMultipleDocuments =
86+ rememberLauncherForActivityResult(ActivityResultContracts .GetMultipleContents ()) { uris ->
87+ coroutineScope.launch {
88+ selectedFiles = uris.mapNotNull { uri ->
89+ FileRecord .fromUri(uri, context)
90+ }
91+ }
92+ }
93+
94+ Scaffold (
95+ modifier = Modifier .fillMaxSize(),
96+ floatingActionButton = {
97+ ExtendedFloatingActionButton (
98+ onClick = {
99+ if (selectMultiple) {
100+ getMultipleDocuments.launch(selectedFilter.mimeType)
101+ } else {
102+ getSingleDocument.launch(selectedFilter.mimeType)
103+ }
104+ },
105+ ) {
106+ Text (if (selectMultiple) " Select Files" else " Select File"
107+ }
108+ },
109+ ) { paddingValues ->
110+ LazyColumn (Modifier .padding(paddingValues)) {
111+ item {
112+ ListItem (
113+ headlineContent = { Text (" File type filter"
114+ supportingContent = {
115+ Text (selectedFilter.name)
116+ },
117+ trailingContent = {
118+ val scrollState = rememberScrollState()
119+ Box (
120+ modifier = Modifier
121+ .wrapContentSize(Alignment .TopStart ),
122+ ) {
123+ IconButton (onClick = { expanded = true }) {
124+ Icon (
125+ painter = painterResource(R .drawable.ic_filter_alt_24),
126+ contentDescription = " Localized description"
127+ )
128+ }
129+ DropdownMenu (
130+ expanded = expanded,
131+ onDismissRequest = { expanded = false },
132+ scrollState = scrollState,
133+ ) {
134+ FileType .entries.forEach { fileType ->
135+ DropdownMenuItem (
136+ text = { Text (fileType.name) },
137+ onClick = { selectedFilter = fileType },
138+ leadingIcon = {
139+ if (selectedFilter == fileType) {
140+ Icon (
141+ Icons .Outlined .Check ,
142+ contentDescription = " Selected"
143+ )
144+ }
145+ },
146+ )
147+ }
148+ }
149+ LaunchedEffect (expanded) {
150+ if (expanded) {
151+ // Scroll to show the bottom menu items.
152+ scrollState.scrollTo(scrollState.maxValue)
153+ }
154+ }
155+ }
156+ },
157+ )
158+ HorizontalDivider ()
159+ }
160+ item {
161+ ListItem (
162+ headlineContent = { Text (" Select multiple files?"
163+ trailingContent = {
164+ Switch (
165+ modifier = Modifier .semantics {
166+ contentDescription = " Select multiple files"
167+ },
168+ checked = selectMultiple,
169+ onCheckedChange = { selectMultiple = it },
170+ thumbContent = {
171+ if (selectMultiple) {
172+ Icon (
173+ imageVector = Icons .Filled .Check ,
174+ contentDescription = null ,
175+ modifier = Modifier .size(SwitchDefaults .IconSize ),
176+ )
177+ }
178+ },
179+ )
180+ },
181+ )
182+ HorizontalDivider ()
183+ }
184+ items(selectedFiles) { file ->
185+ when (file.fileType) {
186+ FileType .Image -> ImageFileCard (file)
187+ FileType .Video -> VideoFileCard (file)
188+ FileType .Audio -> AudioFileCard (file)
189+ FileType .Text -> TextFileCard (file)
190+ FileType .Pdf -> PdfFileCard (file)
191+ FileType .Any -> BinaryFileCard (file)
192+ }
193+ }
194+ }
195+ }
196+ }
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