Plugin.java

/***
  Copyright (c) 2012 CommonsWare, LLC
  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.
  
  Covered in detail in the book _The Busy Coder's Guide to Android Development_
    https://commonsware.com/Android
 */

package com.commonsware.android.rv.plugin;

import android.content.BroadcastReceiver;
import android.content.ComponentName;
import android.content.Context;
import android.content.Intent;
import android.widget.RemoteViews;

public class Plugin extends BroadcastReceiver {
  public static final String ACTION_CALL_FOR_PLUGINS=
      "com.commonsware.android.rv.host.CALL_FOR_PLUGINS";
  public static final String ACTION_REGISTER_PLUGIN=
      "com.commonsware.android.rv.host.REGISTER_PLUGIN";
  public static final String ACTION_CALL_FOR_CONTENT=
      "com.commonsware.android.rv.host.CALL_FOR_CONTENT";
  public static final String ACTION_DELIVER_CONTENT=
      "com.commonsware.android.rv.host.DELIVER_CONTENT";
  public static final String EXTRA_COMPONENT="component";
  public static final String EXTRA_CONTENT="content";
  private static final String HOST_PACKAGE="com.commonsware.android.rv.host";

  @Override
  public void onReceive(Context ctxt, Intent i) {
    if (ACTION_CALL_FOR_PLUGINS.equals(i.getAction())) {
      Intent registration=new Intent(ACTION_REGISTER_PLUGIN);

      registration.setPackage(HOST_PACKAGE);
      registration.putExtra(EXTRA_COMPONENT,
                            new ComponentName(ctxt, getClass()));
      
      ctxt.sendBroadcast(registration);
    }
    else if (ACTION_CALL_FOR_CONTENT.equals(i.getAction())) {
      RemoteViews rv=
          new RemoteViews(ctxt.getPackageName(), R.layout.plugin);
      Intent update=new Intent(ACTION_DELIVER_CONTENT);
      
      update.setPackage(HOST_PACKAGE);
      update.putExtra(EXTRA_CONTENT, rv);
      ctxt.sendBroadcast(update);
    }
  }
}