| /* |
| * Copyright (C) 2015 The Android Open Source Project |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| |
| package android.service.chooser; |
| |
| import android.annotation.SdkConstant; |
| import android.app.Service; |
| import android.content.ComponentName; |
| import android.content.Intent; |
| import android.content.IntentFilter; |
| import android.os.IBinder; |
| import android.os.RemoteException; |
| import android.util.Log; |
| |
| import java.util.List; |
| |
| /** |
| * A service that receives calls from the system when the user is asked to choose |
| * a target for an intent explicitly by another app. The calling app must have invoked |
| * {@link android.content.Intent#ACTION_CHOOSER ACTION_CHOOSER} as handled by the system; |
| * applications do not have the ability to query a ChooserTargetService directly. |
| * |
| * <p>Which ChooserTargetServices are queried depends on a system-level policy decision |
| * made at the moment the chooser is invoked, including but not limited to user time |
| * spent with the app package or associated components in the foreground, recency of usage |
| * or frequency of usage. These will generally correlate with the order that app targets |
| * are shown in the list of intent handlers shown in the system chooser or resolver.</p> |
| * |
| * <p>To extend this class, you must declare the service in your manifest file with |
| * the {@link android.Manifest.permission#BIND_CHOOSER_TARGET_SERVICE} permission |
| * and include an intent filter with the {@link #SERVICE_INTERFACE} action. For example:</p> |
| * <pre> |
| * <service android:name=".MyChooserTargetService" |
| * android:label="@string/service_name" |
| * android:permission="android.permission.BIND_CHOOSER_TARGET_SERVICE"> |
| * <intent-filter> |
| * <action android:name="android.service.chooser.ChooserTargetService" /> |
| * </intent-filter> |
| * </service> |
| * </pre> |
| * |
| * <p>For the system to query your service, you must add a <meta-data> element to the |
| * Activity in your manifest that can handle Intents that you would also like to provide |
| * optional deep links for. For example, a chat app might offer deep links to recent active |
| * conversations instead of invoking a generic picker after the app itself is chosen as a target. |
| * </p> |
| * |
| * <p>The meta-data element should have the name |
| * <code>android.service.chooser.chooser_target_service</code> and a value corresponding to |
| * the component name of your service. Example:</p> |
| * <pre> |
| * <activity android:name=".MyShareActivity" |
| * android:label="@string/share_activity_label"> |
| * <intent-filter> |
| * <action android:name="android.intent.action.SEND" /> |
| * </intent-filter> |
| * <meta-data android:name="android.service.chooser.chooser_target_service" |
| * android:value=".MyChooserTargetService" /> |
| * </activity> |
| * </pre> |
| */ |
| public abstract class ChooserTargetService extends Service { |
| // TAG = "ChooserTargetService[MySubclass]"; |
| private final String TAG = ChooserTargetService.class.getSimpleName() |
| + '[' + getClass().getSimpleName() + ']'; |
| |
| private static final boolean DEBUG = false; |
| |
| /** |
| * The Intent action that a ChooserTargetService must respond to |
| */ |
| @SdkConstant(SdkConstant.SdkConstantType.SERVICE_ACTION) |
| public static final String SERVICE_INTERFACE = "android.service.chooser.ChooserTargetService"; |
| |
| /** |
| * The name of the <code>meta-data</code> element that must be present on an |
| * <code>activity</code> element in a manifest to link it to a ChooserTargetService |
| */ |
| public static final String META_DATA_NAME = "android.service.chooser.chooser_target_service"; |
| |
| /** |
| * The permission that a ChooserTargetService must require in order to bind to it. |
| * If this permission is not enforced the system will skip that ChooserTargetService. |
| */ |
| public static final String BIND_PERMISSION = "android.permission.BIND_CHOOSER_TARGET_SERVICE"; |
| |
| private IChooserTargetServiceWrapper mWrapper = null; |
| |
| /** |
| * Called by the system to retrieve a set of deep-link {@link ChooserTarget targets} that |
| * can handle an intent. |
| * |
| * <p>The returned list should be sorted such that the most relevant targets appear first. |
| * The score for each ChooserTarget will be combined with the system's score for the original |
| * target Activity to sort and filter targets presented to the user.</p> |
| * |
| * <p><em>Important:</em> Calls to this method from other applications will occur on |
| * a binder thread, not on your app's main thread. Make sure that access to relevant data |
| * within your app is thread-safe.</p> |
| * |
| * @param targetActivityName the ComponentName of the matched activity that referred the system |
| * to this ChooserTargetService |
| * @param matchedFilter the specific IntentFilter on the component that was matched |
| * @return a list of deep-link targets to fulfill the intent match, sorted by relevance |
| */ |
| public abstract List<ChooserTarget> onGetChooserTargets(ComponentName targetActivityName, |
| IntentFilter matchedFilter); |
| |
| @Override |
| public IBinder onBind(Intent intent) { |
| if (DEBUG) Log.d(TAG, "onBind " + intent); |
| if (!SERVICE_INTERFACE.equals(intent.getAction())) { |
| if (DEBUG) Log.d(TAG, "bad intent action " + intent.getAction() + "; returning null"); |
| return null; |
| } |
| |
| if (mWrapper == null) { |
| mWrapper = new IChooserTargetServiceWrapper(); |
| } |
| return mWrapper; |
| } |
| |
| private class IChooserTargetServiceWrapper extends IChooserTargetService.Stub { |
| @Override |
| public void getChooserTargets(ComponentName targetComponentName, |
| IntentFilter matchedFilter, IChooserTargetResult result) throws RemoteException { |
| List<ChooserTarget> targets = null; |
| try { |
| if (DEBUG) { |
| Log.d(TAG, "getChooserTargets calling onGetChooserTargets; " |
| + targetComponentName + " filter: " + matchedFilter); |
| } |
| targets = onGetChooserTargets(targetComponentName, matchedFilter); |
| } finally { |
| result.sendResult(targets); |
| if (DEBUG) Log.d(TAG, "Sent results"); |
| } |
| } |
| } |
| } |