1/*
2 * Copyright (C) 2014 Dominik Schürmann <dominik@dominikschuermann.de>
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 org.openintents.openpgp.util;
18
19import org.openintents.openpgp.IOpenPgpService;
20
21import android.content.ComponentName;
22import android.content.Context;
23import android.content.Intent;
24import android.content.ServiceConnection;
25import android.os.IBinder;
26
27public class OpenPgpServiceConnection {
28
29 // interface to create callbacks for onServiceConnected
30 public interface OnBound {
31 public void onBound(IOpenPgpService service);
32 }
33
34 private Context mApplicationContext;
35
36 private IOpenPgpService mService;
37 private String mProviderPackageName;
38
39 private OnBound mOnBoundListener;
40
41 /**
42 * Create new OpenPgpServiceConnection
43 *
44 * @param context
45 * @param providerPackageName specify package name of OpenPGP provider,
46 * e.g., "org.sufficientlysecure.keychain"
47 */
48 public OpenPgpServiceConnection(Context context, String providerPackageName) {
49 this.mApplicationContext = context.getApplicationContext();
50 this.mProviderPackageName = providerPackageName;
51 }
52
53 /**
54 * Create new OpenPgpServiceConnection
55 *
56 * @param context
57 * @param providerPackageName specify package name of OpenPGP provider,
58 * e.g., "org.sufficientlysecure.keychain"
59 * @param onBoundListener callback, executed when connection to service has been established
60 */
61 public OpenPgpServiceConnection(Context context, String providerPackageName,
62 OnBound onBoundListener) {
63 this.mApplicationContext = context.getApplicationContext();
64 this.mProviderPackageName = providerPackageName;
65 this.mOnBoundListener = onBoundListener;
66 }
67
68 public IOpenPgpService getService() {
69 return mService;
70 }
71
72 public boolean isBound() {
73 return (mService != null);
74 }
75
76 private ServiceConnection mServiceConnection = new ServiceConnection() {
77 public void onServiceConnected(ComponentName name, IBinder service) {
78 mService = IOpenPgpService.Stub.asInterface(service);
79 if (mOnBoundListener != null) {
80 mOnBoundListener.onBound(mService);
81 }
82 }
83
84 public void onServiceDisconnected(ComponentName name) {
85 mService = null;
86 }
87 };
88
89 /**
90 * If not already bound, bind to service!
91 *
92 * @return
93 */
94 public boolean bindToService() {
95 // if not already bound...
96 if (mService == null) {
97 try {
98 Intent serviceIntent = new Intent();
99 serviceIntent.setAction(IOpenPgpService.class.getName());
100 // NOTE: setPackage is very important to restrict the intent to this provider only!
101 serviceIntent.setPackage(mProviderPackageName);
102 mApplicationContext.bindService(serviceIntent, mServiceConnection,
103 Context.BIND_AUTO_CREATE);
104
105 return true;
106 } catch (Exception e) {
107 return false;
108 }
109 } else {
110 return true;
111 }
112 }
113
114 public void unbindFromService() {
115 mApplicationContext.unbindService(mServiceConnection);
116 }
117
118}