Svet Ganov | ae0e03a | 2016-02-25 18:22:10 -0800 | [diff] [blame] | 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 android.content.pm.permission; |
| 18 | |
| 19 | import android.annotation.NonNull; |
| 20 | import android.annotation.Nullable; |
| 21 | import android.content.ComponentName; |
| 22 | import android.content.Context; |
| 23 | import android.content.Intent; |
| 24 | import android.content.ServiceConnection; |
Svet Ganov | ae0e03a | 2016-02-25 18:22:10 -0800 | [diff] [blame] | 25 | import android.os.Bundle; |
| 26 | import android.os.Handler; |
| 27 | import android.os.IBinder; |
| 28 | import android.os.Message; |
| 29 | import android.os.RemoteCallback; |
| 30 | import android.os.RemoteException; |
| 31 | import android.permissionpresenterservice.RuntimePermissionPresenterService; |
| 32 | import android.util.Log; |
jackqdyulei | a90bfb5 | 2017-06-22 16:27:29 -0700 | [diff] [blame] | 33 | |
Svet Ganov | ae0e03a | 2016-02-25 18:22:10 -0800 | [diff] [blame] | 34 | import com.android.internal.annotations.GuardedBy; |
| 35 | import com.android.internal.os.SomeArgs; |
| 36 | |
| 37 | import java.util.ArrayList; |
| 38 | import java.util.Collections; |
| 39 | import java.util.List; |
| 40 | |
| 41 | /** |
| 42 | * This class provides information about runtime permissions for a specific |
| 43 | * app or all apps. This information is dedicated for presentation purposes |
| 44 | * and does not necessarily reflect the individual permissions requested/ |
| 45 | * granted to an app as the platform may be grouping permissions to improve |
| 46 | * presentation and help the user make an informed choice. For example, all |
| 47 | * runtime permissions in the same permission group may be presented as a |
| 48 | * single permission in the UI. |
| 49 | * |
| 50 | * @hide |
| 51 | */ |
| 52 | public final class RuntimePermissionPresenter { |
| 53 | private static final String TAG = "RuntimePermPresenter"; |
| 54 | |
| 55 | /** |
| 56 | * The key for retrieving the result from the returned bundle. |
| 57 | * |
| 58 | * @hide |
| 59 | */ |
| 60 | public static final String KEY_RESULT = |
| 61 | "android.content.pm.permission.RuntimePermissionPresenter.key.result"; |
| 62 | |
| 63 | /** |
| 64 | * Listener for delivering a result. |
| 65 | */ |
| 66 | public static abstract class OnResultCallback { |
| 67 | /** |
| 68 | * The result for {@link #getAppPermissions(String, OnResultCallback, Handler)}. |
| 69 | * @param permissions The permissions list. |
| 70 | */ |
| 71 | public void onGetAppPermissions(@NonNull |
| 72 | List<RuntimePermissionPresentationInfo> permissions) { |
| 73 | /* do nothing - stub */ |
| 74 | } |
Svet Ganov | ae0e03a | 2016-02-25 18:22:10 -0800 | [diff] [blame] | 75 | } |
| 76 | |
| 77 | private static final Object sLock = new Object(); |
| 78 | |
| 79 | @GuardedBy("sLock") |
| 80 | private static RuntimePermissionPresenter sInstance; |
| 81 | |
| 82 | private final RemoteService mRemoteService; |
| 83 | |
| 84 | /** |
| 85 | * Gets the singleton runtime permission presenter. |
| 86 | * |
| 87 | * @param context Context for accessing resources. |
| 88 | * @return The singleton instance. |
| 89 | */ |
| 90 | public static RuntimePermissionPresenter getInstance(@NonNull Context context) { |
| 91 | synchronized (sLock) { |
| 92 | if (sInstance == null) { |
| 93 | sInstance = new RuntimePermissionPresenter(context.getApplicationContext()); |
| 94 | } |
| 95 | return sInstance; |
| 96 | } |
| 97 | } |
| 98 | |
| 99 | private RuntimePermissionPresenter(Context context) { |
| 100 | mRemoteService = new RemoteService(context); |
| 101 | } |
| 102 | |
| 103 | /** |
| 104 | * Gets the runtime permissions for an app. |
| 105 | * |
| 106 | * @param packageName The package for which to query. |
| 107 | * @param callback Callback to receive the result. |
| 108 | * @param handler Handler on which to invoke the callback. |
| 109 | */ |
| 110 | public void getAppPermissions(@NonNull String packageName, |
| 111 | @NonNull OnResultCallback callback, @Nullable Handler handler) { |
| 112 | SomeArgs args = SomeArgs.obtain(); |
| 113 | args.arg1 = packageName; |
| 114 | args.arg2 = callback; |
| 115 | args.arg3 = handler; |
| 116 | Message message = mRemoteService.obtainMessage( |
| 117 | RemoteService.MSG_GET_APP_PERMISSIONS, args); |
| 118 | mRemoteService.processMessage(message); |
| 119 | } |
| 120 | |
jackqdyulei | a90bfb5 | 2017-06-22 16:27:29 -0700 | [diff] [blame] | 121 | /** |
| 122 | * Revoke the permission {@code permissionName} for app {@code packageName} |
| 123 | * |
| 124 | * @param packageName The package for which to revoke |
| 125 | * @param permissionName The permission to revoke |
| 126 | */ |
| 127 | public void revokeRuntimePermission(String packageName, String permissionName) { |
| 128 | SomeArgs args = SomeArgs.obtain(); |
| 129 | args.arg1 = packageName; |
| 130 | args.arg2 = permissionName; |
| 131 | |
| 132 | Message message = mRemoteService.obtainMessage( |
| 133 | RemoteService.MSG_REVOKE_APP_PERMISSIONS, args); |
| 134 | mRemoteService.processMessage(message); |
| 135 | } |
| 136 | |
Svet Ganov | ae0e03a | 2016-02-25 18:22:10 -0800 | [diff] [blame] | 137 | private static final class RemoteService |
| 138 | extends Handler implements ServiceConnection { |
| 139 | private static final long UNBIND_TIMEOUT_MILLIS = 10000; |
| 140 | |
| 141 | public static final int MSG_GET_APP_PERMISSIONS = 1; |
| 142 | public static final int MSG_GET_APPS_USING_PERMISSIONS = 2; |
| 143 | public static final int MSG_UNBIND = 3; |
jackqdyulei | a90bfb5 | 2017-06-22 16:27:29 -0700 | [diff] [blame] | 144 | public static final int MSG_REVOKE_APP_PERMISSIONS = 4; |
Svet Ganov | ae0e03a | 2016-02-25 18:22:10 -0800 | [diff] [blame] | 145 | |
| 146 | private final Object mLock = new Object(); |
| 147 | |
| 148 | private final Context mContext; |
| 149 | |
| 150 | @GuardedBy("mLock") |
| 151 | private final List<Message> mPendingWork = new ArrayList<>(); |
| 152 | |
| 153 | @GuardedBy("mLock") |
| 154 | private IRuntimePermissionPresenter mRemoteInstance; |
| 155 | |
| 156 | @GuardedBy("mLock") |
| 157 | private boolean mBound; |
| 158 | |
| 159 | public RemoteService(Context context) { |
| 160 | super(context.getMainLooper(), null, false); |
| 161 | mContext = context; |
| 162 | } |
| 163 | |
| 164 | public void processMessage(Message message) { |
| 165 | synchronized (mLock) { |
| 166 | if (!mBound) { |
| 167 | Intent intent = new Intent( |
| 168 | RuntimePermissionPresenterService.SERVICE_INTERFACE); |
| 169 | intent.setPackage(mContext.getPackageManager() |
| 170 | .getPermissionControllerPackageName()); |
| 171 | mBound = mContext.bindService(intent, this, |
| 172 | Context.BIND_AUTO_CREATE); |
| 173 | } |
| 174 | mPendingWork.add(message); |
| 175 | scheduleNextMessageIfNeededLocked(); |
| 176 | } |
| 177 | } |
| 178 | |
| 179 | @Override |
| 180 | public void onServiceConnected(ComponentName name, IBinder service) { |
| 181 | synchronized (mLock) { |
| 182 | mRemoteInstance = IRuntimePermissionPresenter.Stub.asInterface(service); |
| 183 | scheduleNextMessageIfNeededLocked(); |
| 184 | } |
| 185 | } |
| 186 | |
| 187 | @Override |
| 188 | public void onServiceDisconnected(ComponentName name) { |
| 189 | synchronized (mLock) { |
| 190 | mRemoteInstance = null; |
| 191 | } |
| 192 | } |
| 193 | |
| 194 | @Override |
| 195 | public void handleMessage(Message msg) { |
| 196 | switch (msg.what) { |
| 197 | case MSG_GET_APP_PERMISSIONS: { |
| 198 | SomeArgs args = (SomeArgs) msg.obj; |
| 199 | final String packageName = (String) args.arg1; |
| 200 | final OnResultCallback callback = (OnResultCallback) args.arg2; |
| 201 | final Handler handler = (Handler) args.arg3; |
| 202 | args.recycle(); |
| 203 | final IRuntimePermissionPresenter remoteInstance; |
| 204 | synchronized (mLock) { |
| 205 | remoteInstance = mRemoteInstance; |
| 206 | } |
| 207 | if (remoteInstance == null) { |
| 208 | return; |
| 209 | } |
| 210 | try { |
| 211 | remoteInstance.getAppPermissions(packageName, |
| 212 | new RemoteCallback(new RemoteCallback.OnResultListener() { |
| 213 | @Override |
| 214 | public void onResult(Bundle result) { |
| 215 | final List<RuntimePermissionPresentationInfo> reportedPermissions; |
| 216 | List<RuntimePermissionPresentationInfo> permissions = null; |
| 217 | if (result != null) { |
| 218 | permissions = result.getParcelableArrayList(KEY_RESULT); |
| 219 | } |
| 220 | if (permissions == null) { |
| 221 | permissions = Collections.emptyList(); |
| 222 | } |
| 223 | reportedPermissions = permissions; |
| 224 | if (handler != null) { |
| 225 | handler.post(new Runnable() { |
| 226 | @Override |
| 227 | public void run() { |
| 228 | callback.onGetAppPermissions(reportedPermissions); |
| 229 | } |
| 230 | }); |
| 231 | } else { |
| 232 | callback.onGetAppPermissions(reportedPermissions); |
| 233 | } |
| 234 | } |
| 235 | }, this)); |
| 236 | } catch (RemoteException re) { |
| 237 | Log.e(TAG, "Error getting app permissions", re); |
| 238 | } |
| 239 | scheduleUnbind(); |
| 240 | } break; |
| 241 | |
Svet Ganov | ae0e03a | 2016-02-25 18:22:10 -0800 | [diff] [blame] | 242 | case MSG_UNBIND: { |
| 243 | synchronized (mLock) { |
| 244 | if (mBound) { |
| 245 | mContext.unbindService(this); |
| 246 | mBound = false; |
| 247 | } |
| 248 | mRemoteInstance = null; |
| 249 | } |
| 250 | } break; |
jackqdyulei | a90bfb5 | 2017-06-22 16:27:29 -0700 | [diff] [blame] | 251 | |
| 252 | case MSG_REVOKE_APP_PERMISSIONS: { |
| 253 | SomeArgs args = (SomeArgs) msg.obj; |
| 254 | final String packageName = (String) args.arg1; |
| 255 | final String permissionName = (String) args.arg2; |
| 256 | args.recycle(); |
| 257 | final IRuntimePermissionPresenter remoteInstance; |
| 258 | synchronized (mLock) { |
| 259 | remoteInstance = mRemoteInstance; |
| 260 | } |
| 261 | if (remoteInstance == null) { |
| 262 | return; |
| 263 | } |
| 264 | try { |
| 265 | remoteInstance.revokeRuntimePermission(packageName, permissionName); |
| 266 | } catch (RemoteException re) { |
| 267 | Log.e(TAG, "Error getting app permissions", re); |
| 268 | } |
| 269 | } break; |
Svet Ganov | ae0e03a | 2016-02-25 18:22:10 -0800 | [diff] [blame] | 270 | } |
| 271 | |
| 272 | synchronized (mLock) { |
| 273 | scheduleNextMessageIfNeededLocked(); |
| 274 | } |
| 275 | } |
| 276 | |
| 277 | private void scheduleNextMessageIfNeededLocked() { |
| 278 | if (mBound && mRemoteInstance != null && !mPendingWork.isEmpty()) { |
| 279 | Message nextMessage = mPendingWork.remove(0); |
| 280 | sendMessage(nextMessage); |
| 281 | } |
| 282 | } |
| 283 | |
| 284 | private void scheduleUnbind() { |
| 285 | removeMessages(MSG_UNBIND); |
| 286 | sendEmptyMessageDelayed(MSG_UNBIND, UNBIND_TIMEOUT_MILLIS); |
| 287 | } |
| 288 | } |
| 289 | } |