Show specific error message for busy device. (c18f8076) · Commits · e / os / android_frameworks_base

packages/MtpDocumentsProvider/res/values/strings.xml

+2 −0

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		@@ -25,4 +25,6 @@
		<string name="accessing_notification_title">Accessing files from <xliff:g id="device_model" example="Nexus 9">%1$s</xliff:g></string>
		<!-- Description of notification showing Files app is accessing files in a MTP device. [CHAR LIMIT=60]-->
		<string name="accessing_notification_description">Don\'t disconnect the device</string>
		<!-- Error message shown in Files app when the connected MTP device is busy. [CHAR LIMIT=150]-->
		<string name="error_busy_device">The other device is busy. You can\'t transfer files until it\'s available.</string>
		</resources>

+11 −0

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		@@ -20,10 +20,12 @@ import android.content.ContentResolver;
		import android.content.res.AssetFileDescriptor;
		import android.content.res.Resources;
		import android.database.Cursor;
		import android.database.MatrixCursor;
		import android.graphics.Point;
		import android.media.MediaFile;
		import android.mtp.MtpConstants;
		import android.mtp.MtpObjectInfo;
		import android.os.Bundle;
		import android.os.CancellationSignal;
		import android.os.ParcelFileDescriptor;
		import android.os.storage.StorageManager;
		@@ -35,6 +37,7 @@ import android.util.Log;

		import com.android.internal.annotations.GuardedBy;
		import com.android.internal.annotations.VisibleForTesting;
		import com.android.mtp.exceptions.BusyDeviceException;

		import java.io.FileNotFoundException;
		import java.io.IOException;
		@@ -174,6 +177,14 @@ public class MtpDocumentsProvider extends DocumentsProvider {
		// Returns object list from document loader.
		return getDocumentLoader(parentIdentifier).queryChildDocuments(
		projection, parentIdentifier);
		} catch (BusyDeviceException exception) {
		final Bundle bundle = new Bundle();
		bundle.putString(
		DocumentsContract.EXTRA_ERROR,
		mResources.getString(R.string.error_busy_device));
		final Cursor cursor = new MatrixCursor(projection);
		cursor.setExtras(bundle);
		return cursor;
		} catch (IOException exception) {
		Log.e(MtpDocumentsProvider.TAG, "queryChildDocuments", exception);
		throw new FileNotFoundException(exception.getMessage());

+4 −2

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		@@ -33,6 +33,7 @@ import android.util.Log;
		import android.util.SparseArray;

		import com.android.internal.annotations.VisibleForTesting;
		import com.android.mtp.exceptions.BusyDeviceException;

		import java.io.FileNotFoundException;
		import java.io.IOException;
		@@ -101,7 +102,8 @@ class MtpManager {
		}

		if (!device.open(connection)) {
		throw new IOException("Failed to open a MTP device.");
		// We cannot open connection when another application use the device.
		throw new BusyDeviceException();
		}

		// Handle devices that fail to obtain storages just after opening a MTP session.
		@@ -134,7 +136,7 @@ class MtpManager {
		try {
		roots = getRoots(device.getDeviceId());
		} catch (IOException exp) {
		Log.e(MtpDocumentsProvider.TAG, exp.getMessage());
		Log.e(MtpDocumentsProvider.TAG, "Failed to open device", exp);
		// If we failed to fetch roots for the device, we still returns device model
		// with an empty set of roots so that the device is shown DocumentsUI as long as
		// the device is physically connected.

0 → 100644

+25 −0

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		/*
		* Copyright (C) 2016 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.exceptions;

		import java.io.IOException;

		/**
		* Exception thrown when the device is busy and the requested operation cannon be completed.
		*/
		public class BusyDeviceException extends IOException {
		}

+28 −0

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		@@ -29,6 +29,8 @@ import android.provider.DocumentsContract;
		import android.test.AndroidTestCase;
		import android.test.suitebuilder.annotation.MediumTest;

		import com.android.mtp.exceptions.BusyDeviceException;

		import java.io.FileNotFoundException;
		import java.io.IOException;
		import java.util.Arrays;
		@@ -526,6 +528,32 @@ public class MtpDocumentsProviderTest extends AndroidTestCase {
		}
		}

		public void testBusyDevice() throws Exception {
		mMtpManager = new TestMtpManager(getContext()) {
		@Override
		void openDevice(int deviceId) throws IOException {
		throw new BusyDeviceException();
		}
		};
		setupProvider(MtpDatabaseConstants.FLAG_DATABASE_IN_MEMORY);
		mMtpManager.addValidDevice(new MtpDeviceRecord(
		0, "Device A", false /* unopened */, new MtpRoot[0], null, null));

		mProvider.resumeRootScanner();
		mResolver.waitForNotification(ROOTS_URI, 1);

		try (final Cursor cursor = mProvider.queryRoots(null)) {
		assertEquals(1, cursor.getCount());
		}

		try (final Cursor cursor = mProvider.queryChildDocuments("1", null, null)) {
		assertEquals(0, cursor.getCount());
		assertEquals(
		"error_busy_device",
		cursor.getExtras().getString(DocumentsContract.EXTRA_ERROR));
		}
		}

		private void setupProvider(int flag) {
		mDatabase = new MtpDatabase(getContext(), flag);
		mProvider = new MtpDocumentsProvider();