mirror of
https://github.com/love2d/love-android.git
synced 2026-08-12 08:31:04 +02:00
Merge branch 'vxdp' into 12.x
This commit is contained in:
Miku AuahDark
@@ -57,5 +57,15 @@
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||||
<data android:mimeType="*/*" />
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||||
</intent-filter>
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||||
</activity>
|
||||
<provider
|
||||
android:name="org.love2d.android.LoveDocumentsProvider"
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||||
android:authorities="${applicationId}.documents"
|
||||
android:exported="true"
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||||
android:grantUriPermissions="true"
|
||||
android:permission="android.permission.MANAGE_DOCUMENTS">
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||||
<intent-filter>
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||||
<action android:name="android.content.action.DOCUMENTS_PROVIDER" />
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||||
</intent-filter>
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||||
</provider>
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||||
</application>
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||||
</manifest>
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||||
|
||||
@@ -0,0 +1,663 @@
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||||
/*
|
||||
* Copyright (C) 2013 The Android Open Source Project
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||||
*
|
||||
* 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.
|
||||
*/
|
||||
|
||||
/*
|
||||
* Modified for use with LOVE by the LOVE Development Team
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||||
* Copyright (C) 2022 LOVE Development Team
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||||
*/
|
||||
|
||||
package org.love2d.android;
|
||||
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||||
import static android.os.Build.VERSION.SDK_INT;
|
||||
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||||
import android.content.res.AssetFileDescriptor;
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||||
import android.database.Cursor;
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||||
import android.database.MatrixCursor;
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||||
import android.graphics.Point;
|
||||
import android.os.Build;
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||||
import android.os.CancellationSignal;
|
||||
import android.os.Handler;
|
||||
import android.os.ParcelFileDescriptor;
|
||||
import android.provider.DocumentsContract.Document;
|
||||
import android.provider.DocumentsContract.Root;
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||||
import android.provider.DocumentsProvider;
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||||
import android.util.Log;
|
||||
import android.webkit.MimeTypeMap;
|
||||
|
||||
import java.io.File;
|
||||
import java.io.FileInputStream;
|
||||
import java.io.FileNotFoundException;
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||||
import java.io.FileOutputStream;
|
||||
import java.io.IOException;
|
||||
import java.io.InputStream;
|
||||
import java.io.OutputStream;
|
||||
import java.util.Collections;
|
||||
import java.util.Comparator;
|
||||
import java.util.HashSet;
|
||||
import java.util.LinkedList;
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||||
import java.util.PriorityQueue;
|
||||
import java.util.Set;
|
||||
|
||||
/**
|
||||
* Manages documents and exposes them to the Android system for sharing.
|
||||
*/
|
||||
public class LoveDocumentsProvider extends DocumentsProvider {
|
||||
private static final String TAG = "LoveDocumentsProvider";
|
||||
|
||||
// Use these as the default columns to return information about a root if no specific
|
||||
// columns are requested in a query.
|
||||
private static final String[] DEFAULT_ROOT_PROJECTION = new String[]{
|
||||
Root.COLUMN_ROOT_ID,
|
||||
Root.COLUMN_MIME_TYPES,
|
||||
Root.COLUMN_FLAGS,
|
||||
Root.COLUMN_ICON,
|
||||
Root.COLUMN_TITLE,
|
||||
Root.COLUMN_SUMMARY,
|
||||
Root.COLUMN_DOCUMENT_ID,
|
||||
Root.COLUMN_AVAILABLE_BYTES
|
||||
};
|
||||
|
||||
// Use these as the default columns to return information about a document if no specific
|
||||
// columns are requested in a query.
|
||||
private static final String[] DEFAULT_DOCUMENT_PROJECTION = new String[]{
|
||||
Document.COLUMN_DOCUMENT_ID,
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||||
Document.COLUMN_MIME_TYPE,
|
||||
Document.COLUMN_DISPLAY_NAME,
|
||||
Document.COLUMN_LAST_MODIFIED,
|
||||
Document.COLUMN_FLAGS,
|
||||
Document.COLUMN_SIZE
|
||||
};
|
||||
|
||||
// No official policy on how many to return, but make sure you do limit the number of recent
|
||||
// and search results.
|
||||
private static final int MAX_SEARCH_RESULTS = 20;
|
||||
private static final int MAX_LAST_MODIFIED = 5;
|
||||
|
||||
private static final String ROOT = "root";
|
||||
|
||||
// This file is the base of our root
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||||
private File mBaseDir;
|
||||
|
||||
@Override
|
||||
public boolean onCreate() {
|
||||
Log.v(TAG, "onCreate");
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||||
|
||||
mBaseDir = getContext().getExternalFilesDir(null);
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||||
return true;
|
||||
}
|
||||
|
||||
@Override
|
||||
public Cursor queryRoots(String[] projection) throws FileNotFoundException {
|
||||
Log.v(TAG, "queryRoots");
|
||||
|
||||
// Create a cursor with either the requested fields, or the default projection. This
|
||||
// cursor is returned to the Android system picker UI and used to display all roots from
|
||||
// this provider.
|
||||
final MatrixCursor result = new MatrixCursor(resolveRootProjection(projection));
|
||||
|
||||
// It's possible to have multiple roots
|
||||
final MatrixCursor.RowBuilder row = result.newRow();
|
||||
|
||||
row.add(Root.COLUMN_ROOT_ID, ROOT);
|
||||
row.add(Root.COLUMN_SUMMARY, null);
|
||||
|
||||
// FLAG_SUPPORTS_CREATE means at least one directory under the root supports creating
|
||||
// documents. FLAG_SUPPORTS_RECENTS means your application's most recently used
|
||||
// documents will show up in the "Recents" category. FLAG_SUPPORTS_SEARCH allows users
|
||||
// to search all documents the application shares. FLAG_SUPPORTS_IS_CHILD allows
|
||||
// testing parent child relationships, available after SDK 21 (Lollipop).
|
||||
if (SDK_INT < Build.VERSION_CODES.LOLLIPOP) {
|
||||
row.add(Root.COLUMN_FLAGS, Root.FLAG_SUPPORTS_CREATE |
|
||||
Root.FLAG_SUPPORTS_RECENTS |
|
||||
Root.FLAG_SUPPORTS_SEARCH);
|
||||
} else {
|
||||
row.add(Root.COLUMN_FLAGS, Root.FLAG_SUPPORTS_CREATE |
|
||||
Root.FLAG_SUPPORTS_RECENTS |
|
||||
Root.FLAG_SUPPORTS_SEARCH |
|
||||
Root.FLAG_SUPPORTS_IS_CHILD);
|
||||
}
|
||||
|
||||
// COLUMN_TITLE is the root title (e.g. what will be displayed to identify your provider).
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row.add(Root.COLUMN_TITLE, getContext().getApplicationInfo().loadLabel(getContext().getPackageManager()).toString());
|
||||
|
||||
// This document id must be unique within this provider and consistent across time. The
|
||||
// system picker UI may save it and refer to it later.
|
||||
row.add(Root.COLUMN_DOCUMENT_ID, getDocIdForFile(mBaseDir));
|
||||
|
||||
// The child MIME types are used to filter the roots and only present to the user roots
|
||||
// that contain the desired type somewhere in their file hierarchy.
|
||||
row.add(Root.COLUMN_MIME_TYPES, "*/*");
|
||||
row.add(Root.COLUMN_AVAILABLE_BYTES, mBaseDir.getFreeSpace());
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||||
row.add(Root.COLUMN_ICON, R.drawable.love);
|
||||
|
||||
return result;
|
||||
}
|
||||
|
||||
@Override
|
||||
public Cursor queryRecentDocuments(String rootId, String[] projection)
|
||||
throws FileNotFoundException {
|
||||
Log.v(TAG, "queryRecentDocuments");
|
||||
|
||||
// This implementation walks a local file structure to find the most recently
|
||||
// modified files.
|
||||
|
||||
// Create a cursor with the requested projection, or the default projection.
|
||||
final MatrixCursor result = new MatrixCursor(resolveDocumentProjection(projection));
|
||||
|
||||
final File parent = getFileForDocId(rootId);
|
||||
|
||||
// Create a queue to store the most recent documents, which orders by last modified.
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||||
PriorityQueue<File> lastModifiedFiles = new PriorityQueue<File>(5, new Comparator<File>() {
|
||||
public int compare(File i, File j) {
|
||||
return Long.compare(i.lastModified(), j.lastModified());
|
||||
}
|
||||
});
|
||||
|
||||
// Iterate through all files and directories in the file structure under the root. If
|
||||
// the file is more recent than the least recently modified, add it to the queue,
|
||||
// limiting the number of results.
|
||||
final LinkedList<File> pending = new LinkedList<File>();
|
||||
|
||||
// Start by adding the parent to the list of files to be processed
|
||||
pending.add(parent);
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||||
|
||||
// Do while we still have unexamined files
|
||||
while (!pending.isEmpty()) {
|
||||
// Take a file from the list of unprocessed files
|
||||
final File file = pending.removeFirst();
|
||||
if (file.isDirectory()) {
|
||||
// If it's a directory, add all its children to the unprocessed list
|
||||
Collections.addAll(pending, file.listFiles());
|
||||
} else {
|
||||
// If it's a file, add it to the ordered queue.
|
||||
lastModifiedFiles.add(file);
|
||||
}
|
||||
}
|
||||
|
||||
// Add the most recent files to the cursor, not exceeding the max number of results.
|
||||
int includedCount = 0;
|
||||
while (includedCount < MAX_LAST_MODIFIED + 1 && !lastModifiedFiles.isEmpty()) {
|
||||
final File file = lastModifiedFiles.remove();
|
||||
includeFile(result, null, file);
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||||
includedCount++;
|
||||
}
|
||||
return result;
|
||||
}
|
||||
|
||||
@Override
|
||||
public Cursor querySearchDocuments(String rootId, String query, String[] projection)
|
||||
throws FileNotFoundException {
|
||||
Log.v(TAG, "querySearchDocuments");
|
||||
|
||||
// Create a cursor with the requested projection, or the default projection.
|
||||
final MatrixCursor result = new MatrixCursor(resolveDocumentProjection(projection));
|
||||
final File parent = getFileForDocId(rootId);
|
||||
|
||||
// This implementation searches file names for the query and doesn't rank search
|
||||
// results, so we can stop as soon as we find a sufficient number of matches. Other
|
||||
// implementations might use other data about files, rather than the file name, to
|
||||
// produce a match;
|
||||
|
||||
// Iterate through all files in the file structure under the root until we reach the
|
||||
// desired number of matches.
|
||||
final LinkedList<File> pending = new LinkedList<File>();
|
||||
|
||||
// Start by adding the parent to the list of files to be processed
|
||||
pending.add(parent);
|
||||
|
||||
// Do while we still have unexamined files, and fewer than the max search results
|
||||
while (!pending.isEmpty() && result.getCount() < MAX_SEARCH_RESULTS) {
|
||||
// Take a file from the list of unprocessed files
|
||||
final File file = pending.removeFirst();
|
||||
if (file.isDirectory()) {
|
||||
// If it's a directory, add all its children to the unprocessed list
|
||||
Collections.addAll(pending, file.listFiles());
|
||||
} else {
|
||||
// If it's a file and it matches, add it to the result cursor.
|
||||
if (file.getName().toLowerCase().contains(query)) {
|
||||
includeFile(result, null, file);
|
||||
}
|
||||
}
|
||||
}
|
||||
return result;
|
||||
}
|
||||
|
||||
@Override
|
||||
public AssetFileDescriptor openDocumentThumbnail(String documentId, Point sizeHint,
|
||||
CancellationSignal signal)
|
||||
throws FileNotFoundException {
|
||||
Log.v(TAG, "openDocumentThumbnail");
|
||||
|
||||
final File file = getFileForDocId(documentId);
|
||||
final ParcelFileDescriptor pfd =
|
||||
ParcelFileDescriptor.open(file, ParcelFileDescriptor.MODE_READ_ONLY);
|
||||
return new AssetFileDescriptor(pfd, 0, AssetFileDescriptor.UNKNOWN_LENGTH);
|
||||
}
|
||||
|
||||
@Override
|
||||
public Cursor queryDocument(String documentId, String[] projection)
|
||||
throws FileNotFoundException {
|
||||
Log.v(TAG, "queryDocument");
|
||||
|
||||
// Create a cursor with the requested projection, or the default projection.
|
||||
final MatrixCursor result = new MatrixCursor(resolveDocumentProjection(projection));
|
||||
includeFile(result, documentId, null);
|
||||
return result;
|
||||
}
|
||||
|
||||
@Override
|
||||
public Cursor queryChildDocuments(String parentDocumentId, String[] projection,
|
||||
String sortOrder) throws FileNotFoundException {
|
||||
Log.v(TAG, "queryChildDocuments, parentDocumentId: " +
|
||||
parentDocumentId +
|
||||
" sortOrder: " +
|
||||
sortOrder);
|
||||
|
||||
final MatrixCursor result = new MatrixCursor(resolveDocumentProjection(projection));
|
||||
final File parent = getFileForDocId(parentDocumentId);
|
||||
for (File file : parent.listFiles()) {
|
||||
includeFile(result, null, file);
|
||||
}
|
||||
return result;
|
||||
}
|
||||
|
||||
@Override
|
||||
public ParcelFileDescriptor openDocument(final String documentId, final String mode, CancellationSignal signal) throws FileNotFoundException {
|
||||
Log.v(TAG, "openDocument, mode: " + mode);
|
||||
|
||||
final File file = getFileForDocId(documentId);
|
||||
final int accessMode = ParcelFileDescriptor.parseMode(mode);
|
||||
return ParcelFileDescriptor.open(file, accessMode);
|
||||
}
|
||||
|
||||
public boolean isChildFile(File parentFile, File childFile) {
|
||||
File realFileParent = childFile.getParentFile();
|
||||
return realFileParent == null || realFileParent.equals(parentFile);
|
||||
}
|
||||
|
||||
@Override
|
||||
public boolean isChildDocument(String parentDocumentId, String documentId) {
|
||||
Log.v(TAG, "isChildDocument");
|
||||
if(documentId.startsWith(parentDocumentId)) {
|
||||
return true;
|
||||
} else {
|
||||
return false;
|
||||
}
|
||||
}
|
||||
|
||||
@Override
|
||||
public String createDocument(String documentId, String mimeType, String displayName)
|
||||
throws FileNotFoundException {
|
||||
Log.v(TAG, "createDocument");
|
||||
|
||||
File parent = getFileForDocId(documentId);
|
||||
File file = new File(parent.getPath(), displayName);
|
||||
int conflictId = 1;
|
||||
while(file.exists()) {
|
||||
file = new File(parent.getPath(), displayName + "(" + conflictId++ + ")");
|
||||
}
|
||||
try {
|
||||
// Create the new File to copy into
|
||||
boolean wasNewFileCreated = false;
|
||||
if (Document.MIME_TYPE_DIR.equals(mimeType)) {
|
||||
wasNewFileCreated = file.mkdir();
|
||||
} else {
|
||||
wasNewFileCreated = file.createNewFile();
|
||||
}
|
||||
|
||||
if (!wasNewFileCreated) {
|
||||
throw new FileNotFoundException("Failed to create document with name " +
|
||||
displayName + " and documentId " + documentId);
|
||||
}
|
||||
} catch (IOException e) {
|
||||
throw new FileNotFoundException("Failed to create document with name " +
|
||||
displayName + " and documentId " + documentId);
|
||||
}
|
||||
return getDocIdForFile(file);
|
||||
}
|
||||
|
||||
@Override
|
||||
public String renameDocument(String documentId, String displayName)
|
||||
throws FileNotFoundException {
|
||||
Log.v(TAG, "renameDocument");
|
||||
if (displayName == null) {
|
||||
throw new FileNotFoundException("Failed to rename document, new name is null");
|
||||
}
|
||||
|
||||
// Create the destination file in the same directory as the source file
|
||||
File sourceFile = getFileForDocId(documentId);
|
||||
File sourceParentFile = sourceFile.getParentFile();
|
||||
if (sourceParentFile == null) {
|
||||
throw new FileNotFoundException("Failed to rename document. File has no parent.");
|
||||
}
|
||||
File destFile = new File(sourceParentFile.getPath(), displayName);
|
||||
|
||||
// Try to do the rename
|
||||
try {
|
||||
boolean renameSucceeded = sourceFile.renameTo(destFile);
|
||||
if (!renameSucceeded) {
|
||||
throw new FileNotFoundException("Failed to rename document. Renamed failed.");
|
||||
}
|
||||
} catch (Exception e) {
|
||||
Log.w(TAG, "Rename exception : " + e.getLocalizedMessage() + e.getCause());
|
||||
throw new FileNotFoundException("Failed to rename document. Error: " + e.getMessage());
|
||||
}
|
||||
|
||||
return getDocIdForFile(destFile);
|
||||
}
|
||||
|
||||
@Override
|
||||
public void deleteDocument(String documentId) throws FileNotFoundException {
|
||||
Log.v(TAG, "deleteDocument");
|
||||
File file = getFileForDocId(documentId);
|
||||
if (file.delete()) {
|
||||
Log.i(TAG, "Deleted file with id " + documentId);
|
||||
} else {
|
||||
throw new FileNotFoundException("Failed to delete document with id " + documentId);
|
||||
}
|
||||
}
|
||||
|
||||
@Override
|
||||
public void removeDocument(String documentId, String parentDocumentId)
|
||||
throws FileNotFoundException {
|
||||
Log.v(TAG, "removeDocument");
|
||||
File parent = getFileForDocId(parentDocumentId);
|
||||
File file = getFileForDocId(documentId);
|
||||
|
||||
if (file == null) {
|
||||
throw new FileNotFoundException("Failed to delete document with id " + documentId);
|
||||
}
|
||||
|
||||
// removeDocument is the same as deleteDocument but allows the parent to be specified
|
||||
// Check here if the specified parentDocumentId matches the true parent of documentId
|
||||
boolean doesFileParentMatch = false;
|
||||
File fileParent = file.getParentFile();
|
||||
|
||||
if (fileParent == null || fileParent.equals(parent)) {
|
||||
doesFileParentMatch = true;
|
||||
}
|
||||
|
||||
// Remove the file if parent matches or file and parent are equal
|
||||
if (parent.equals(file) || doesFileParentMatch) {
|
||||
if (file.delete()) {
|
||||
Log.i(TAG, "Deleted file with id " + documentId);
|
||||
} else {
|
||||
throw new FileNotFoundException("Failed to delete document with id " + documentId);
|
||||
}
|
||||
} else {
|
||||
throw new FileNotFoundException("Failed to delete document with id " + documentId);
|
||||
}
|
||||
}
|
||||
|
||||
/**
|
||||
* overload copyDocument to insist that the parent matches
|
||||
*/
|
||||
public String copyDocument(String sourceDocumentId, String sourceParentDocumentId,
|
||||
String targetParentDocumentId) throws FileNotFoundException {
|
||||
Log.v(TAG, "copyDocument with document parent");
|
||||
if (!isChildDocument(sourceParentDocumentId, sourceDocumentId)) {
|
||||
throw new FileNotFoundException("Failed to copy document with id " +
|
||||
sourceDocumentId + ". Parent is not: " + sourceParentDocumentId);
|
||||
}
|
||||
return copyDocument(sourceDocumentId, targetParentDocumentId);
|
||||
}
|
||||
|
||||
@Override
|
||||
public String copyDocument(String sourceDocumentId, String targetParentDocumentId)
|
||||
throws FileNotFoundException {
|
||||
Log.v(TAG, "copyDocument");
|
||||
|
||||
File parent = getFileForDocId(targetParentDocumentId);
|
||||
File oldFile = getFileForDocId(sourceDocumentId);
|
||||
File newFile = new File(parent.getPath(), oldFile.getName());
|
||||
try {
|
||||
int conflictId = 1;
|
||||
while(newFile.exists()) {
|
||||
newFile = new File(parent.getPath(), oldFile.getName() + "(" + conflictId++ + ")");
|
||||
}
|
||||
// Create the new File to copy into
|
||||
boolean wasNewFileCreated = false;
|
||||
boolean isDirectory = Document.MIME_TYPE_DIR.equals(getTypeForFile(oldFile));
|
||||
if(isDirectory) {
|
||||
if (newFile.mkdir()) {
|
||||
if (newFile.setWritable(true) && newFile.setReadable(true)) {
|
||||
wasNewFileCreated = true;
|
||||
}
|
||||
}
|
||||
} else {
|
||||
if (newFile.createNewFile()) {
|
||||
if (newFile.setWritable(true) && newFile.setReadable(true)) {
|
||||
wasNewFileCreated = true;
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
if (!wasNewFileCreated) {
|
||||
throw new FileNotFoundException("Failed to copy document " + sourceDocumentId +
|
||||
". Could not create new file.");
|
||||
}
|
||||
|
||||
if(!isDirectory) {
|
||||
// Copy the bytes into the new file
|
||||
try (InputStream inStream = new FileInputStream(oldFile)) {
|
||||
try (OutputStream outStream = new FileOutputStream(newFile)) {
|
||||
// Transfer bytes from in to out
|
||||
byte[] buf = new byte[16384]; // disk: 8-64k
|
||||
int len;
|
||||
while ((len = inStream.read(buf)) > 0) {
|
||||
outStream.write(buf, 0, len);
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
} catch (IOException e) {
|
||||
throw new FileNotFoundException("Failed to copy document: " + sourceDocumentId +
|
||||
". " + e.getMessage());
|
||||
}
|
||||
return getDocIdForFile(newFile);
|
||||
}
|
||||
|
||||
@Override
|
||||
public String moveDocument(String sourceDocumentId, String sourceParentDocumentId,
|
||||
String targetParentDocumentId) throws FileNotFoundException {
|
||||
Log.v(TAG, "moveDocument");
|
||||
try {
|
||||
// Copy document, insisting that the parent is correct
|
||||
String newDocumentId = copyDocument(sourceDocumentId, sourceParentDocumentId,
|
||||
targetParentDocumentId);
|
||||
// Remove old document
|
||||
removeDocument(sourceDocumentId, sourceParentDocumentId);
|
||||
return newDocumentId;
|
||||
} catch (FileNotFoundException e) {
|
||||
throw new FileNotFoundException("Failed to move document " + sourceDocumentId);
|
||||
}
|
||||
}
|
||||
|
||||
@Override
|
||||
public String getDocumentType(String documentId) throws FileNotFoundException {
|
||||
File file = getFileForDocId(documentId);
|
||||
return getTypeForFile(file);
|
||||
}
|
||||
|
||||
/**
|
||||
* @param projection the requested root column projection
|
||||
* @return either the requested root column projection, or the default projection if the
|
||||
* requested projection is null.
|
||||
*/
|
||||
private static String[] resolveRootProjection(String[] projection) {
|
||||
return projection != null ? projection : DEFAULT_ROOT_PROJECTION;
|
||||
}
|
||||
|
||||
private static String[] resolveDocumentProjection(String[] projection) {
|
||||
return projection != null ? projection : DEFAULT_DOCUMENT_PROJECTION;
|
||||
}
|
||||
|
||||
/**
|
||||
* Get a file's MIME type
|
||||
*
|
||||
* @param file the File object whose type we want
|
||||
* @return the MIME type of the file
|
||||
*/
|
||||
private static String getTypeForFile(File file) {
|
||||
if (file.isDirectory()) {
|
||||
return Document.MIME_TYPE_DIR;
|
||||
} else {
|
||||
return getTypeForName(file.getName());
|
||||
}
|
||||
}
|
||||
|
||||
/**
|
||||
* Get the MIME data type of a document, given its filename.
|
||||
*
|
||||
* @param name the filename of the document
|
||||
* @return the MIME data type of a document
|
||||
*/
|
||||
private static String getTypeForName(String name) {
|
||||
final int lastDot = name.lastIndexOf('.');
|
||||
if (lastDot >= 0) {
|
||||
final String extension = name.substring(lastDot + 1);
|
||||
if(extension == "love") {
|
||||
return "application/x-love-game";
|
||||
}
|
||||
final String mime = MimeTypeMap.getSingleton().getMimeTypeFromExtension(extension);
|
||||
if (mime != null) {
|
||||
return mime;
|
||||
}
|
||||
}
|
||||
return "application/octet-stream";
|
||||
}
|
||||
|
||||
/**
|
||||
* Get the document ID given a File. The document id must be consistent across time. Other
|
||||
* applications may save the ID and use it to reference documents later.
|
||||
* <p/>
|
||||
* This implementation is specific to this demo. It assumes only one root and is built
|
||||
* directly from the file structure. However, it is possible for a document to be a child of
|
||||
* multiple directories (for example "android" and "images"), in which case the file must have
|
||||
* the same consistent, unique document ID in both cases.
|
||||
*
|
||||
* @param file the File whose document ID you want
|
||||
* @return the corresponding document ID
|
||||
*/
|
||||
private String getDocIdForFile(File file) {
|
||||
String path = file.getAbsolutePath();
|
||||
|
||||
// Start at first char of path under root
|
||||
final String rootPath = mBaseDir.getPath();
|
||||
if (rootPath.equals(path)) {
|
||||
path = "";
|
||||
} else if (rootPath.endsWith("/")) {
|
||||
path = path.substring(rootPath.length());
|
||||
} else {
|
||||
path = path.substring(rootPath.length() + 1);
|
||||
}
|
||||
|
||||
return ROOT + ':' + path;
|
||||
}
|
||||
|
||||
/**
|
||||
* Add a representation of a file to a cursor.
|
||||
*
|
||||
* @param result the cursor to modify
|
||||
* @param docId the document ID representing the desired file (may be null if given file)
|
||||
* @param file the File object representing the desired file (may be null if given docID)
|
||||
* @throws FileNotFoundException
|
||||
*/
|
||||
private void includeFile(MatrixCursor result, String docId, File file)
|
||||
throws FileNotFoundException {
|
||||
if (docId == null) {
|
||||
docId = getDocIdForFile(file);
|
||||
} else {
|
||||
file = getFileForDocId(docId);
|
||||
}
|
||||
|
||||
int flags = 0;
|
||||
|
||||
if (file.isDirectory()) {
|
||||
// Add FLAG_DIR_SUPPORTS_CREATE if the file is a writable directory.
|
||||
if (file.isDirectory() && file.canWrite()) {
|
||||
flags |= Document.FLAG_DIR_SUPPORTS_CREATE;
|
||||
}
|
||||
} else if (file.canWrite()) {
|
||||
// If the file is writable set FLAG_SUPPORTS_WRITE and
|
||||
// FLAG_SUPPORTS_DELETE
|
||||
flags |= Document.FLAG_SUPPORTS_WRITE;
|
||||
flags |= Document.FLAG_SUPPORTS_DELETE;
|
||||
|
||||
// Add SDK specific flags if appropriate
|
||||
if (SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
|
||||
flags |= Document.FLAG_SUPPORTS_RENAME;
|
||||
}
|
||||
if (SDK_INT >= Build.VERSION_CODES.N) {
|
||||
flags |= Document.FLAG_SUPPORTS_REMOVE;
|
||||
flags |= Document.FLAG_SUPPORTS_MOVE;
|
||||
flags |= Document.FLAG_SUPPORTS_COPY;
|
||||
}
|
||||
}
|
||||
|
||||
final String displayName = file.getName();
|
||||
final String mimeType = getTypeForFile(file);
|
||||
|
||||
if (mimeType.startsWith("image/")) {
|
||||
// Allow the image to be represented by a thumbnail rather than an icon
|
||||
flags |= Document.FLAG_SUPPORTS_THUMBNAIL;
|
||||
}
|
||||
|
||||
final MatrixCursor.RowBuilder row = result.newRow();
|
||||
row.add(Document.COLUMN_DOCUMENT_ID, docId);
|
||||
if(file.getAbsolutePath() == mBaseDir.getAbsolutePath()) {
|
||||
row.add(Document.COLUMN_DISPLAY_NAME, getContext().getApplicationInfo().loadLabel(getContext().getPackageManager()).toString());
|
||||
} else {
|
||||
row.add(Document.COLUMN_DISPLAY_NAME, displayName);
|
||||
}
|
||||
row.add(Document.COLUMN_SIZE, file.length());
|
||||
row.add(Document.COLUMN_MIME_TYPE, mimeType);
|
||||
row.add(Document.COLUMN_LAST_MODIFIED, file.lastModified());
|
||||
row.add(Document.COLUMN_FLAGS, flags);
|
||||
|
||||
// Add a custom icon
|
||||
if(mimeType == "application/x-love-game") {
|
||||
row.add(Document.COLUMN_ICON, R.drawable.love);
|
||||
} else {
|
||||
row.add(Document.COLUMN_ICON, null);
|
||||
}
|
||||
}
|
||||
|
||||
/**
|
||||
* Translate your custom URI scheme into a File object.
|
||||
*
|
||||
* @param docId the document ID representing the desired file
|
||||
* @return a File represented by the given document ID
|
||||
* @throws java.io.FileNotFoundException
|
||||
*/
|
||||
private File getFileForDocId(String docId) throws FileNotFoundException {
|
||||
File target = mBaseDir;
|
||||
if (docId.equals(ROOT)) {
|
||||
return target;
|
||||
}
|
||||
final int splitIndex = docId.indexOf(':', 1);
|
||||
if (splitIndex < 0) {
|
||||
throw new FileNotFoundException("Missing root for " + docId);
|
||||
} else {
|
||||
final String path = docId.substring(splitIndex + 1);
|
||||
target = new File(target, path);
|
||||
if (!target.exists()) {
|
||||
throw new FileNotFoundException("Missing file for " + docId + " at " + target);
|
||||
}
|
||||
return target;
|
||||
}
|
||||
}
|
||||
}
|
||||
Reference in New Issue
Block a user