add folder provider (/data/data)
This commit is contained in:
ShirosakiMio
parent
4743331017
commit
379c12a9d8
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@ -117,13 +117,17 @@
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android:process=":processService"
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android:process=":processService"
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android:enabled="true"/>
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android:enabled="true"/>
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<provider
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<provider
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android:name="androidx.core.content.FileProvider"
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android:name=".scoped.FolderProvider"
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android:authorities="@string/file_browser_provider"
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android:authorities="@string/file_browser_provider"
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android:exported="false"
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android:exported="true"
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android:grantUriPermissions="true">
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android:grantUriPermissions="true"
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android:permission="android.permission.MANAGE_DOCUMENTS">
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<meta-data
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<meta-data
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android:name="android.support.FILE_PROVIDER_PATHS"
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android:name="android.support.FILE_PROVIDER_PATHS"
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android:resource="@xml/provider_paths"/>
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android:resource="@xml/provider_paths"/>
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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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</provider>
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</application>
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</application>
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<queries>
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<queries>
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@ -0,0 +1,332 @@
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package com.tungsten.fcl.scoped;
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import android.annotation.TargetApi;
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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;
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import android.os.CancellationSignal;
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import android.os.ParcelFileDescriptor;
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import android.provider.DocumentsContract;
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import android.provider.DocumentsContract.Document;
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import android.provider.DocumentsContract.Root;
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import android.provider.DocumentsProvider;
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import android.util.Log;
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import android.webkit.MimeTypeMap;
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import androidx.annotation.Nullable;
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import com.tungsten.fcl.R;
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import com.tungsten.fclcore.util.io.FileUtils;
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import java.io.File;
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import java.io.FileNotFoundException;
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import java.io.IOException;
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import java.util.ArrayList;
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import java.util.Collections;
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import java.util.LinkedList;
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import java.util.List;
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/**
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* A document provider for the Storage Access Framework which exposes the files in the
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* $HOME/ directory to other apps.
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* <p/>
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* Note that this replaces providing an activity matching the ACTION_GET_CONTENT intent:
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* <p/>
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* "A document provider and ACTION_GET_CONTENT should be considered mutually exclusive. If you
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* support both of them simultaneously, your app will appear twice in the system picker UI,
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* offering two different ways of accessing your stored data. This would be confusing for users."
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* - <a href="http://developer.android.com/guide/topics/providers/document-provider.html#43">...</a>
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*/
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public class FolderProvider extends DocumentsProvider {
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private static final String ALL_MIME_TYPES = "*/*";
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// The default columns to return information about a root if no specific
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// columns are requested in a query.
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private static final String[] DEFAULT_ROOT_PROJECTION = new String[]{
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Root.COLUMN_ROOT_ID,
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Root.COLUMN_MIME_TYPES,
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Root.COLUMN_FLAGS,
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Root.COLUMN_ICON,
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Root.COLUMN_TITLE,
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Root.COLUMN_SUMMARY,
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Root.COLUMN_DOCUMENT_ID,
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Root.COLUMN_AVAILABLE_BYTES
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};
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// The default columns to return information about a document if no specific
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// columns are requested in a query.
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private static final String[] DEFAULT_DOCUMENT_PROJECTION = new String[]{
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Document.COLUMN_DOCUMENT_ID,
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Document.COLUMN_MIME_TYPE,
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Document.COLUMN_DISPLAY_NAME,
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Document.COLUMN_LAST_MODIFIED,
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Document.COLUMN_FLAGS,
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Document.COLUMN_SIZE
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};
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@Override
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public Cursor queryRoots(String[] projection) {
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final MatrixCursor result = new MatrixCursor(projection != null ? projection : DEFAULT_ROOT_PROJECTION);
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final String applicationName = getContext().getString(R.string.app_name);
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final File BASE_DIR = getContext().getFilesDir().getParentFile();
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final MatrixCursor.RowBuilder row = result.newRow();
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row.add(Root.COLUMN_ROOT_ID, getDocIdForFile(BASE_DIR));
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row.add(Root.COLUMN_DOCUMENT_ID, getDocIdForFile(BASE_DIR));
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row.add(Root.COLUMN_SUMMARY, null);
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row.add(Root.COLUMN_FLAGS, Root.FLAG_SUPPORTS_CREATE | Root.FLAG_SUPPORTS_SEARCH | Root.FLAG_SUPPORTS_IS_CHILD);
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row.add(Root.COLUMN_TITLE, applicationName);
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row.add(Root.COLUMN_MIME_TYPES, ALL_MIME_TYPES);
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row.add(Root.COLUMN_AVAILABLE_BYTES, BASE_DIR.getFreeSpace());
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row.add(Root.COLUMN_ICON, R.mipmap.ic_launcher);
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return result;
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}
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@Override
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public Cursor queryDocument(String documentId, String[] projection) throws FileNotFoundException {
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final MatrixCursor result = new MatrixCursor(projection != null ? projection : DEFAULT_DOCUMENT_PROJECTION);
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includeFile(result, documentId, null);
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return result;
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}
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@Override
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public Cursor queryChildDocuments(String parentDocumentId, String[] projection, String sortOrder) throws FileNotFoundException {
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final MatrixCursor result = new MatrixCursor(projection != null ? projection : DEFAULT_DOCUMENT_PROJECTION);
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final File parent = getFileForDocId(parentDocumentId);
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final File[] children = parent.listFiles();
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if(children == null) throw new FileNotFoundException("Unable to list files in "+parent.getAbsolutePath());
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for (File file : children) {
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includeFile(result, null, file);
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}
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return result;
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}
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@Override
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public ParcelFileDescriptor openDocument(final String documentId, String mode, CancellationSignal signal) throws FileNotFoundException {
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final File file = getFileForDocId(documentId);
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final int accessMode = ParcelFileDescriptor.parseMode(mode);
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return ParcelFileDescriptor.open(file, accessMode);
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}
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@Override
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public AssetFileDescriptor openDocumentThumbnail(String documentId, Point sizeHint, CancellationSignal signal) throws FileNotFoundException {
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final File file = getFileForDocId(documentId);
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final ParcelFileDescriptor pfd = ParcelFileDescriptor.open(file, ParcelFileDescriptor.MODE_READ_ONLY);
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return new AssetFileDescriptor(pfd, 0, file.length());
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}
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@Override
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public boolean onCreate() {
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return true;
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}
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@Override
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public String createDocument(String parentDocumentId, String mimeType, String displayName) throws FileNotFoundException {
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File newFile = new File(parentDocumentId, displayName);
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int noConflictId = 2;
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while (newFile.exists()) {
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newFile = new File(parentDocumentId, displayName + " (" + noConflictId++ + ")");
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}
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try {
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boolean succeeded;
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if (Document.MIME_TYPE_DIR.equals(mimeType)) {
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succeeded = newFile.mkdir();
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} else {
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succeeded = newFile.createNewFile();
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}
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if (!succeeded) {
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throw new FileNotFoundException("Failed to create document with id " + newFile.getPath());
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}
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} catch (IOException e) {
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throw new FileNotFoundException("Failed to create document with id " + newFile.getPath());
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}
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return newFile.getPath();
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}
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@Override
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public String renameDocument(String documentId, String displayName) throws FileNotFoundException {
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File sourceFile = getFileForDocId(documentId);
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File sourceParent = sourceFile.getParentFile();
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if(sourceParent == null) throw new FileNotFoundException("Cannot rename root");
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File targetFile = new File(getDocIdForFile(sourceParent) + "/" + displayName);
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if(!sourceFile.renameTo(targetFile)){
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throw new FileNotFoundException("Couldn't rename the document with id" + documentId);
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}
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return getDocIdForFile(targetFile);
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}
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@Override
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public String moveDocument(String sourceDocumentId, String sourceParentDocumentId, String targetParentDocumentId) throws FileNotFoundException {
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File sourceFile = getFileForDocId(sourceParentDocumentId + sourceDocumentId);
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File targetFile = new File(targetParentDocumentId + sourceDocumentId);
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if(!sourceFile.renameTo(targetFile)){
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throw new FileNotFoundException("Failed to move the document with id " + sourceFile.getPath());
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}
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return getDocIdForFile(targetFile);
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}
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@Override
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public void removeDocument(String documentId, String parentDocumentId) throws FileNotFoundException {
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deleteDocument(parentDocumentId + "/" + documentId);
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}
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@Override
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public void deleteDocument(String documentId) throws FileNotFoundException {
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File file = getFileForDocId(documentId);
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if(file.isDirectory()){
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try {
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FileUtils.deleteDirectory(file);
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} catch (IOException e) {
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throw new FileNotFoundException("Failed to delete document with id " + documentId);
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}
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}else{
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if (!file.delete()) {
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throw new FileNotFoundException("Failed to delete document with id " + documentId);
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}
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}
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}
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@Override
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public String getDocumentType(String documentId) throws FileNotFoundException {
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Log.i("FolderPRovider", "getDocumentType("+documentId+")");
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File file = getFileForDocId(documentId);
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return getMimeType(file);
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}
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@Override
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public Cursor querySearchDocuments(String rootId, String query, String[] projection) throws FileNotFoundException {
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final MatrixCursor result = new MatrixCursor(projection != null ? projection : DEFAULT_DOCUMENT_PROJECTION);
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final File parent = getFileForDocId(rootId);
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// This example implementation searches file names for the query and doesn't rank search
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// results, so we can stop as soon as we find a sufficient number of matches. Other
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// implementations might rank results and use other data about files, rather than the file
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// name, to produce a match.
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final LinkedList<File> pending = new LinkedList<>();
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pending.add(parent);
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final int MAX_SEARCH_RESULTS = 50;
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while (!pending.isEmpty() && result.getCount() < MAX_SEARCH_RESULTS) {
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final File file = pending.removeFirst();
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// Avoid directories outside the $HOME directory linked with symlinks (to avoid e.g. search
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// through the whole SD card).
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boolean isInsideHome;
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try {
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final File BASE_DIR = getContext().getFilesDir().getParentFile();
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isInsideHome = file.getCanonicalPath().startsWith(BASE_DIR.getAbsolutePath());
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} catch (IOException e) {
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isInsideHome = true;
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}
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if (isInsideHome) {
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if (file.isDirectory()) {
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File[] listing = file.listFiles();
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if(listing != null) Collections.addAll(pending, listing);
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} else {
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if (file.getName().toLowerCase().contains(query)) {
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includeFile(result, null, file);
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}
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}
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}
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}
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return result;
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}
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@Override
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public boolean isChildDocument(String parentDocumentId, String documentId) {
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return documentId.startsWith(parentDocumentId);
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}
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/**
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* Get the document id given a file. This document id must be consistent across time as other
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* applications may save the ID and use it to reference documents later.
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* <p/>
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* The reverse of @{link #getFileForDocId}.
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*/
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private static String getDocIdForFile(File file) {
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return file.getAbsolutePath();
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}
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/**
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* Get the file given a document id (the reverse of {@link #getDocIdForFile(File)}).
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*/
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private static File getFileForDocId(String docId) throws FileNotFoundException {
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final File f = new File(docId);
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if (!f.exists()) throw new FileNotFoundException(f.getAbsolutePath() + " not found");
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return f;
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}
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private static String getMimeType(File file) {
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if (file.isDirectory()) {
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return Document.MIME_TYPE_DIR;
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} else {
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final String name = file.getName();
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final int lastDot = name.lastIndexOf('.');
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if (lastDot >= 0) {
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final String extension = name.substring(lastDot + 1).toLowerCase();
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final String mime = MimeTypeMap.getSingleton().getMimeTypeFromExtension(extension);
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if (mime != null) return mime;
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}
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return "application/octet-stream";
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}
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}
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/**
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* Add a representation of a file to a cursor.
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*
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* @param result the cursor to modify
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* @param docId the document ID representing the desired file (may be null if given file)
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* @param file the File object representing the desired file (may be null if given docID)
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*/
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private void includeFile(MatrixCursor result, String docId, File file)
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throws FileNotFoundException {
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if (docId == null) {
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docId = getDocIdForFile(file);
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} else {
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file = getFileForDocId(docId);
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}
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int flags = 0;
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if (file.isDirectory()) {
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if (file.canWrite()) flags |= Document.FLAG_DIR_SUPPORTS_CREATE;
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} else if (file.canWrite()) {
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flags |= Document.FLAG_SUPPORTS_WRITE;
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}
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File parent = file.getParentFile();
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if(parent != null) { // Only fails in one case: when the parent is /, which you can't delete.
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if(parent.canWrite()) flags |= Document.FLAG_SUPPORTS_DELETE;
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}
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final String displayName = file.getName();
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final String mimeType = getMimeType(file);
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if (mimeType.startsWith("image/")) flags |= Document.FLAG_SUPPORTS_THUMBNAIL;
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final MatrixCursor.RowBuilder row = result.newRow();
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row.add(Document.COLUMN_DOCUMENT_ID, docId);
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row.add(Document.COLUMN_DISPLAY_NAME, displayName);
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row.add(Document.COLUMN_SIZE, file.length());
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row.add(Document.COLUMN_MIME_TYPE, mimeType);
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row.add(Document.COLUMN_LAST_MODIFIED, file.lastModified());
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row.add(Document.COLUMN_FLAGS, flags);
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row.add(Document.COLUMN_ICON, R.mipmap.ic_launcher);
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}
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@Override
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@TargetApi(26)
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public DocumentsContract.Path findDocumentPath(@Nullable String parentDocumentId, String childDocumentId) throws FileNotFoundException {
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File source = getContext().getFilesDir().getParentFile();;
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if(parentDocumentId != null) source = getFileForDocId(parentDocumentId);
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File destination = getFileForDocId(childDocumentId);
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List<String> pathIds = new ArrayList<>();
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while(!source.equals(destination) && destination != null) {
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pathIds.add(getDocIdForFile(destination));
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destination = destination.getParentFile();
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}
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pathIds.add(getDocIdForFile(source));
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Collections.reverse(pathIds);
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Log.i("FolderProvider", pathIds.toString());
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return new DocumentsContract.Path(getDocIdForFile(source), pathIds);
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}
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}
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