Implement queryRoot method of MtpDocumentsProvider. (50d17aa8) · Commits · e / os / android_frameworks_base

packages/MtpDocumentsProvider/src/com/android/mtp/Identifier.java

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+32 −0

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		/*
		* Copyright (C) 2015 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.mtp;

		/**
		* Static utilities for ID.
		*/
		abstract class Identifier {
		// TODO: Make the ID persistent.
		static String createRootId(long deviceId, long storageId) {
		return String.format("%d:%d", deviceId, storageId);
		}

		// TODO: Make the ID persistent.
		static String createDocumentId(String rootId, long objectHandle) {
		return String.format("%s:%d", rootId, objectHandle);
		}
		}

packages/MtpDocumentsProvider/src/com/android/mtp/MtpDocument.java

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+23 −0

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		/*
		* Copyright (C) 2015 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.mtp;

		class MtpDocument {
		static final int DUMMY_HANDLE_FOR_ROOT = 0;

		// TODO: Implement model class for MTP document.
		}

packages/MtpDocumentsProvider/src/com/android/mtp/MtpDocumentsProvider.java

+36 −9

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		@@ -18,6 +18,7 @@ package com.android.mtp;

		import android.content.ContentResolver;
		import android.database.Cursor;
		import android.database.MatrixCursor;
		import android.os.CancellationSignal;
		import android.os.ParcelFileDescriptor;
		import android.provider.DocumentsContract;
		@@ -76,7 +77,33 @@ public class MtpDocumentsProvider extends DocumentsProvider {

		@Override
		public Cursor queryRoots(String[] projection) throws FileNotFoundException {
		throw new FileNotFoundException();
		if (projection == null) {
		projection = MtpDocumentsProvider.DEFAULT_ROOT_PROJECTION;
		}
		final MatrixCursor cursor = new MatrixCursor(projection);
		for (final int deviceId : mMtpManager.getOpenedDeviceIds()) {
		try {
		final MtpRoot[] roots = mMtpManager.getRoots(deviceId);
		// TODO: Add retry logic here.

		for (final MtpRoot root : roots) {
		final String rootId = Identifier.createRootId(deviceId, root.mStorageId);
		final MatrixCursor.RowBuilder builder = cursor.newRow();
		builder.add(Root.COLUMN_ROOT_ID, rootId);
		builder.add(Root.COLUMN_FLAGS, Root.FLAG_SUPPORTS_IS_CHILD);
		builder.add(Root.COLUMN_TITLE, root.mDescription);
		builder.add(
		Root.COLUMN_DOCUMENT_ID,
		Identifier.createDocumentId(rootId, MtpDocument.DUMMY_HANDLE_FOR_ROOT));
		builder.add(Root.COLUMN_AVAILABLE_BYTES , root.mFreeSpace);
		}
		} catch (IOException error) {
		Log.d(TAG, error.getMessage());
		}
		}
		cursor.setNotificationUri(
		mResolver, DocumentsContract.buildRootsUri(MtpDocumentsProvider.AUTHORITY));
		return cursor;
		}

		@Override
		@@ -100,12 +127,12 @@ public class MtpDocumentsProvider extends DocumentsProvider {

		void openDevice(int deviceId) throws IOException {
		mMtpManager.openDevice(deviceId);
		notifyRootsUpdate();
		notifyRootsChange();
		}

		void closeDevice(int deviceId) throws IOException {
		mMtpManager.closeDevice(deviceId);
		notifyRootsUpdate();
		notifyRootsChange();
		}

		void closeAllDevices() {
		@@ -119,18 +146,18 @@ public class MtpDocumentsProvider extends DocumentsProvider {
		}
		}
		if (closed) {
		notifyRootsUpdate();
		notifyRootsChange();
		}
		}

		private void notifyRootsUpdate() {
		boolean hasOpenedDevices() {
		return mMtpManager.getOpenedDeviceIds().length != 0;
		}

		private void notifyRootsChange() {
		mResolver.notifyChange(
		DocumentsContract.buildRootsUri(MtpDocumentsProvider.AUTHORITY),
		null,
		false);
		}

		boolean hasOpenedDevices() {
		return mMtpManager.getOpenedDeviceIds().length != 0;
		}
		}

packages/MtpDocumentsProvider/src/com/android/mtp/MtpManager.java

+19 −5

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		@@ -76,11 +76,7 @@ class MtpManager {
		}

		synchronized void closeDevice(int deviceId) throws IOException {
		final MtpDevice device = mDevices.get(deviceId);
		if (device == null) {
		throw new IOException("USB device " + deviceId + " is not opened.");
		}
		mDevices.get(deviceId).close();
		getDevice(deviceId).close();
		mDevices.remove(deviceId);
		}

		@@ -91,4 +87,22 @@ class MtpManager {
		}
		return result;
		}

		synchronized MtpRoot[] getRoots(int deviceId) throws IOException {
		final MtpDevice device = getDevice(deviceId);
		final int[] storageIds = device.getStorageIds();
		final MtpRoot[] results = new MtpRoot[storageIds.length];
		for (int i = 0; i < storageIds.length; i++) {
		results[i] = new MtpRoot(device.getStorageInfo(storageIds[i]));
		}
		return results;
		}

		private MtpDevice getDevice(int deviceId) throws IOException {
		final MtpDevice device = mDevices.get(deviceId);
		if (device == null) {
		throw new IOException("USB device " + deviceId + " is not opened.");
		}
		return device;
		}
		}

packages/MtpDocumentsProvider/src/com/android/mtp/MtpRoot.java

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+39 −0

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		/*
		* Copyright (C) 2015 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.mtp;

		import android.mtp.MtpStorageInfo;

		class MtpRoot {
		final long mStorageId;
		final String mDescription;
		final long mFreeSpace;
		final long mMaxCapacity;
		final String mVolumeIdentifier;

		MtpRoot(MtpStorageInfo storageInfo) {
		mStorageId = storageInfo.getStorageId();
		mDescription = storageInfo.getDescription();
		mFreeSpace = storageInfo.getFreeSpace();
		mMaxCapacity = storageInfo.getMaxCapacity();
		if (!storageInfo.getVolumeIdentifier().equals("")) {
		mVolumeIdentifier = storageInfo.getVolumeIdentifier();
		} else {
		mVolumeIdentifier = null;
		}
		}
		}