| /* |
| * 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.hardware.usb.UsbDevice; |
| import android.hardware.usb.UsbDeviceConnection; |
| import android.hardware.usb.UsbManager; |
| import android.os.SystemClock; |
| |
| import java.io.IOException; |
| import java.util.HashMap; |
| import java.util.Objects; |
| |
| import junit.framework.Assert; |
| |
| /** |
| * Static utility methods for testing. |
| */ |
| final class TestUtil { |
| private TestUtil() {} |
| |
| /** |
| * Requests permission for a MTP device and returns the first MTP device that has at least one |
| * storage. |
| */ |
| static UsbDevice setupMtpDevice( |
| TestResultInstrumentation instrumentation, |
| UsbManager usbManager, |
| MtpManager manager) { |
| while (true) { |
| final UsbDevice device = findMtpDevice(instrumentation, usbManager, manager); |
| try { |
| manager.openDevice(device.getDeviceId()); |
| waitForStorages(instrumentation, manager, device.getDeviceId()); |
| return device; |
| } catch (IOException exp) { |
| instrumentation.show(Objects.toString(exp.getMessage())); |
| SystemClock.sleep(1000); |
| // When the MTP device is Android, and it changes the USB device type from |
| // "Charging" to "MTP", the device ID will be updated. We need to find a device |
| // again. |
| continue; |
| } |
| } |
| } |
| |
| private static UsbDevice findMtpDevice( |
| TestResultInstrumentation instrumentation, |
| UsbManager usbManager, |
| MtpManager manager) { |
| while (true) { |
| final HashMap<String,UsbDevice> devices = usbManager.getDeviceList(); |
| if (devices.size() == 0) { |
| instrumentation.show("Wait for devices."); |
| SystemClock.sleep(1000); |
| continue; |
| } |
| final UsbDevice device = devices.values().iterator().next(); |
| try { |
| manager.openDevice(device.getDeviceId()); |
| } catch (IOException e) { |
| // Maybe other application is using the device. |
| // Force to obtain ownership of the device so that we can use the device next call |
| // of findMtpDevice. |
| instrumentation.show("Tries to get ownership of MTP device."); |
| final UsbDeviceConnection connection = usbManager.openDevice(device); |
| if (connection == null) { |
| Assert.fail("Cannot open USB connection."); |
| return null; |
| } |
| for (int i = 0; i < device.getInterfaceCount(); i++) { |
| // Since the test runs real environment, we need to call claim interface with |
| // force = true to rob interfaces from other applications. |
| connection.claimInterface(device.getInterface(i), true); |
| connection.releaseInterface(device.getInterface(i)); |
| } |
| connection.close(); |
| SystemClock.sleep(1000); |
| continue; |
| } |
| return device; |
| } |
| } |
| |
| private static void waitForStorages( |
| TestResultInstrumentation instrumentation, |
| MtpManager manager, |
| int deviceId) throws IOException { |
| while (true) { |
| MtpDeviceRecord device = null; |
| for (final MtpDeviceRecord deviceCandidate : manager.getDevices()) { |
| if (deviceCandidate.deviceId == deviceId) { |
| device = deviceCandidate; |
| break; |
| } |
| } |
| if (device == null) { |
| throw new IOException("Device was detached."); |
| } |
| if (device.roots.length == 0) { |
| instrumentation.show("Wait for storages."); |
| SystemClock.sleep(1000); |
| continue; |
| } |
| return; |
| } |
| } |
| } |