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.permissionpresenterservice; 18 19 import android.annotation.SystemApi; 20 import android.app.Service; 21 import android.content.Context; 22 import android.content.Intent; 23 import android.content.pm.ApplicationInfo; 24 import android.content.pm.permission.IRuntimePermissionPresenter; 25 import android.content.pm.permission.RuntimePermissionPresentationInfo; 26 import android.content.pm.permission.RuntimePermissionPresenter; 27 import android.os.Bundle; 28 import android.os.Handler; 29 import android.os.IBinder; 30 import android.os.Looper; 31 import android.os.Message; 32 import android.os.RemoteCallback; 33 import com.android.internal.os.SomeArgs; 34 35 import java.util.List; 36 37 /** 38 * This service presents information regarding runtime permissions that is 39 * used for presenting them in the UI. Runtime permissions are presented as 40 * a single permission in the UI but may be composed of several individual 41 * permissions. 42 * 43 * @see RuntimePermissionPresenter 44 * @see RuntimePermissionPresentationInfo 45 * 46 * @hide 47 */ 48 @SystemApi 49 public abstract class RuntimePermissionPresenterService extends Service { 50 51 /** 52 * The {@link Intent} action that must be declared as handled by a service 53 * in its manifest for the system to recognize it as a runtime permission 54 * presenter service. 55 */ 56 public static final String SERVICE_INTERFACE = 57 "android.permissionpresenterservice.RuntimePermissionPresenterService"; 58 59 // No need for locking - always set first and never modified 60 private Handler mHandler; 61 62 @Override attachBaseContext(Context base)63 public final void attachBaseContext(Context base) { 64 super.attachBaseContext(base); 65 mHandler = new MyHandler(base.getMainLooper()); 66 } 67 68 /** 69 * Gets the runtime permissions for an app. 70 * 71 * @param packageName The package for which to query. 72 */ onGetAppPermissions(String packageName)73 public abstract List<RuntimePermissionPresentationInfo> onGetAppPermissions(String packageName); 74 75 /** 76 * Gets the apps that use runtime permissions. 77 * 78 * @param system Whether to return only the system apps or only the non-system ones. 79 * @return The app list. 80 */ onGetAppsUsingPermissions(boolean system)81 public abstract List<ApplicationInfo> onGetAppsUsingPermissions(boolean system); 82 83 @Override onBind(Intent intent)84 public final IBinder onBind(Intent intent) { 85 return new IRuntimePermissionPresenter.Stub() { 86 @Override 87 public void getAppPermissions(String packageName, RemoteCallback callback) { 88 SomeArgs args = SomeArgs.obtain(); 89 args.arg1 = packageName; 90 args.arg2 = callback; 91 mHandler.obtainMessage(MyHandler.MSG_GET_APP_PERMISSIONS, 92 args).sendToTarget(); 93 } 94 95 @Override 96 public void getAppsUsingPermissions(boolean system, RemoteCallback callback) { 97 mHandler.obtainMessage(MyHandler.MSG_GET_APPS_USING_PERMISSIONS, 98 system ? 1 : 0, 0, callback).sendToTarget(); 99 } 100 }; 101 } 102 103 private final class MyHandler extends Handler { 104 public static final int MSG_GET_APP_PERMISSIONS = 1; 105 public static final int MSG_GET_APPS_USING_PERMISSIONS = 2; 106 107 public MyHandler(Looper looper) { 108 super(looper, null, false); 109 } 110 111 @Override 112 public void handleMessage(Message msg) { 113 switch (msg.what) { 114 case MSG_GET_APP_PERMISSIONS: { 115 SomeArgs args = (SomeArgs) msg.obj; 116 String packageName = (String) args.arg1; 117 RemoteCallback callback = (RemoteCallback) args.arg2; 118 args.recycle(); 119 List<RuntimePermissionPresentationInfo> permissions = 120 onGetAppPermissions(packageName); 121 if (permissions != null && !permissions.isEmpty()) { 122 Bundle result = new Bundle(); 123 result.putParcelableList(RuntimePermissionPresenter.KEY_RESULT, 124 permissions); 125 callback.sendResult(result); 126 } else { 127 callback.sendResult(null); 128 } 129 } break; 130 131 case MSG_GET_APPS_USING_PERMISSIONS: { 132 RemoteCallback callback = (RemoteCallback) msg.obj; 133 final boolean system = msg.arg1 == 1; 134 List<ApplicationInfo> apps = onGetAppsUsingPermissions(system); 135 if (apps != null && !apps.isEmpty()) { 136 Bundle result = new Bundle(); 137 result.putParcelableList(RuntimePermissionPresenter.KEY_RESULT, apps); 138 callback.sendResult(result); 139 } else { 140 callback.sendResult(null); 141 } 142 } break; 143 } 144 } 145 } 146 } 147