1/*
2 * Copyright (C) 2016 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 *      http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17package com.android.mtp;
18
19import android.app.Activity;
20import android.content.Intent;
21import android.hardware.usb.UsbDevice;
22import android.hardware.usb.UsbManager;
23import android.net.Uri;
24import android.os.Bundle;
25import android.provider.DocumentsContract;
26import android.util.Log;
27
28import java.io.IOException;
29
30/**
31 * Invisible activity to receive intents.
32 * To show Files app for the UsbManager.ACTION_USB_DEVICE_ATTACHED intent, the intent should be
33 * received by activity. The activity has NoDisplay theme and immediately terminate after routing
34 * intent to DocumentsUI.
35 */
36public class ReceiverActivity extends Activity {
37    @Override
38    protected void onCreate(Bundle savedInstanceState) {
39        super.onCreate(savedInstanceState);
40        if (UsbManager.ACTION_USB_DEVICE_ATTACHED.equals(getIntent().getAction())) {
41            final UsbDevice device = getIntent().getParcelableExtra(UsbManager.EXTRA_DEVICE);
42            try {
43                final MtpDocumentsProvider provider = MtpDocumentsProvider.getInstance();
44                provider.openDevice(device.getDeviceId());
45                final String deviceRootId = provider.getDeviceDocumentId(device.getDeviceId());
46                final Uri uri = DocumentsContract.buildRootUri(
47                        MtpDocumentsProvider.AUTHORITY, deviceRootId);
48
49                final Intent intent = new Intent(Intent.ACTION_VIEW);
50                intent.setDataAndType(uri, DocumentsContract.Root.MIME_TYPE_ITEM);
51                intent.addCategory(Intent.CATEGORY_DEFAULT);
52                this.startActivity(intent);
53            } catch (IOException exception) {
54                Log.e(MtpDocumentsProvider.TAG, "Failed to open device", exception);
55            }
56        }
57        finish();
58    }
59}
60