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 
17 package com.android.mtp;
18 
19 import android.app.Activity;
20 import android.content.Intent;
21 import android.hardware.usb.UsbDevice;
22 import android.hardware.usb.UsbManager;
23 import android.net.Uri;
24 import android.os.Bundle;
25 import android.provider.DocumentsContract;
26 import android.util.Log;
27 
28 import 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  */
36 public class ReceiverActivity extends Activity {
37     @Override
onCreate(Bundle savedInstanceState)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