| /* |
| * Copyright (C) 2006 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.gadget; |
| |
| import android.content.BroadcastReceiver; |
| import android.content.Context; |
| import android.content.Intent; |
| import android.os.Bundle; |
| |
| /** |
| * A conveience class to aid in implementing a gadget provider. |
| * Everything you can do with GadgetProvider, you can do with a regular {@link BroadcastReceiver}. |
| * GadgetProvider merely parses the relevant fields out of the Intent that is received in |
| * {@link #onReceive(Context,Intent) onReceive(Context,Intent)}, and calls hook methods |
| * with the received extras. |
| * |
| * <p>Extend this class and override one or more of the {@link #onUpdate}, {@link #onDeleted}, |
| * {@link #onEnabled} or {@link #onDisabled} methods to implement your own gadget functionality. |
| * |
| * <h3>Sample Code</h3> |
| * For an example of how to write a gadget provider, see the |
| * <a href="{@toroot}reference/android/gadget/package-descr.html#providers">android.gadget |
| * package overview</a>. |
| */ |
| public class GadgetProvider extends BroadcastReceiver { |
| /** |
| * Constructor to initialize GadgetProvider. |
| */ |
| public GadgetProvider() { |
| } |
| |
| /** |
| * Implements {@link BroadcastReceiver#onReceive} to dispatch calls to the various |
| * other methods on GadgetProvider. |
| * |
| * @param context The Context in which the receiver is running. |
| * @param intent The Intent being received. |
| */ |
| // BEGIN_INCLUDE(onReceive) |
| public void onReceive(Context context, Intent intent) { |
| // Protect against rogue update broadcasts (not really a security issue, |
| // just filter bad broacasts out so subclasses are less likely to crash). |
| String action = intent.getAction(); |
| if (GadgetManager.ACTION_GADGET_UPDATE.equals(action)) { |
| Bundle extras = intent.getExtras(); |
| if (extras != null) { |
| int[] gadgetIds = extras.getIntArray(GadgetManager.EXTRA_GADGET_IDS); |
| if (gadgetIds != null && gadgetIds.length > 0) { |
| this.onUpdate(context, GadgetManager.getInstance(context), gadgetIds); |
| } |
| } |
| } |
| else if (GadgetManager.ACTION_GADGET_DELETED.equals(action)) { |
| Bundle extras = intent.getExtras(); |
| if (extras != null) { |
| int[] gadgetIds = extras.getIntArray(GadgetManager.EXTRA_GADGET_IDS); |
| if (gadgetIds != null && gadgetIds.length > 0) { |
| this.onDeleted(context, gadgetIds); |
| } |
| } |
| } |
| else if (GadgetManager.ACTION_GADGET_ENABLED.equals(action)) { |
| this.onEnabled(context); |
| } |
| else if (GadgetManager.ACTION_GADGET_DISABLED.equals(action)) { |
| this.onDisabled(context); |
| } |
| } |
| // END_INCLUDE(onReceive) |
| |
| /** |
| * Called in response to the {@link GadgetManager#ACTION_GADGET_UPDATE} broadcast when |
| * this gadget provider is being asked to provide {@link android.widget.RemoteViews RemoteViews} |
| * for a set of gadgets. Override this method to implement your own gadget functionality. |
| * |
| * {@more} |
| * |
| * @param context The {@link android.content.Context Context} in which this receiver is |
| * running. |
| * @param gadgetManager A {@link GadgetManager} object you can call {@link |
| * GadgetManager#updateGadget} on. |
| * @param gadgetIds The gadgetsIds for which an update is needed. Note that this |
| * may be all of the gadget instances for this provider, or just |
| * a subset of them. |
| * |
| * @see GadgetManager#ACTION_GADGET_UPDATE |
| */ |
| public void onUpdate(Context context, GadgetManager gadgetManager, int[] gadgetIds) { |
| } |
| |
| /** |
| * Called in response to the {@link GadgetManager#ACTION_GADGET_DELETED} broadcast when |
| * one or more gadget instances have been deleted. Override this method to implement |
| * your own gadget functionality. |
| * |
| * {@more} |
| * |
| * @param context The {@link android.content.Context Context} in which this receiver is |
| * running. |
| * @param gadgetIds The gadgetsIds that have been deleted from their host. |
| * |
| * @see GadgetManager#ACTION_GADGET_DELETED |
| */ |
| public void onDeleted(Context context, int[] gadgetIds) { |
| } |
| |
| /** |
| * Called in response to the {@link GadgetManager#ACTION_GADGET_ENABLED} broadcast when |
| * the a gadget for this provider is instantiated. Override this method to implement your |
| * own gadget functionality. |
| * |
| * {@more} |
| * When the last gadget for this provider is deleted, |
| * {@link GadgetManager#ACTION_GADGET_DISABLED} is sent by the gadget manager, and |
| * {@link #onDisabled} is called. If after that, a gadget for this provider is created |
| * again, onEnabled() will be called again. |
| * |
| * @param context The {@link android.content.Context Context} in which this receiver is |
| * running. |
| * |
| * @see GadgetManager#ACTION_GADGET_ENABLED |
| */ |
| public void onEnabled(Context context) { |
| } |
| |
| /** |
| * Called in response to the {@link GadgetManager#ACTION_GADGET_DISABLED} broadcast, which |
| * is sent when the last gadget instance for this provider is deleted. Override this method |
| * to implement your own gadget functionality. |
| * |
| * {@more} |
| * |
| * @param context The {@link android.content.Context Context} in which this receiver is |
| * running. |
| * |
| * @see GadgetManager#ACTION_GADGET_DISABLED |
| */ |
| public void onDisabled(Context context) { |
| } |
| } |