com.ravi.apps.android.newsbytes.widget.NewsWidgetProvider.java Source code

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Here is the source code for com.ravi.apps.android.newsbytes.widget.NewsWidgetProvider.java

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/*
 * Copyright (C) 2015 Ravi
 *
 * 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 com.ravi.apps.android.newsbytes.widget;

import android.app.PendingIntent;
import android.appwidget.AppWidgetManager;
import android.appwidget.AppWidgetProvider;
import android.content.ComponentName;
import android.content.Context;
import android.content.Intent;
import android.net.Uri;
import android.os.Build;
import android.support.v4.app.TaskStackBuilder;
import android.util.Log;
import android.widget.RemoteViews;

import com.ravi.apps.android.newsbytes.MainActivity;
import com.ravi.apps.android.newsbytes.R;
import com.ravi.apps.android.newsbytes.sync.NewsSyncAdapter;

/**
 * Provides news headlines collection widgets.
 */
public class NewsWidgetProvider extends AppWidgetProvider {

    // Tag for logging messages.
    private static final String LOG_TAG = NewsWidgetProvider.class.getSimpleName();

    @Override
    public void onUpdate(Context context, AppWidgetManager appWidgetManager, int[] appWidgetIds) {
        Log.d(LOG_TAG, context.getString(R.string.log_on_update));

        // Update each app widget instance with remote view and corresponding remote adapter.
        for (int appWidgetId : appWidgetIds) {
            // Create the remote views object for the widget instance.
            RemoteViews remoteView = new RemoteViews(context.getPackageName(), R.layout.widget_news);

            // Create the intent that starts the service which will provide the views for this collection.
            Intent serviceIntent = new Intent(context, NewsWidgetRemoteViewsService.class);

            // Add the app widget id to the intent extras.
            serviceIntent.putExtra(AppWidgetManager.EXTRA_APPWIDGET_ID, appWidgetId);
            serviceIntent.setData(Uri.parse(serviceIntent.toUri(Intent.URI_INTENT_SCHEME)));

            // Set the remote adapter onto the scores list view in the remote view.
            if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.ICE_CREAM_SANDWICH) {
                remoteView.setRemoteAdapter(R.id.widget_list_view, serviceIntent);
            } else {
                remoteView.setRemoteAdapter(appWidgetId, R.id.widget_list_view, serviceIntent);
            }

            // Create an intent to launch the main activity and set it on the remote view's title.
            Intent intent = new Intent(context, MainActivity.class);
            PendingIntent pendingIntent = PendingIntent.getActivity(context, 0, intent, 0);
            remoteView.setOnClickPendingIntent(R.id.widget, pendingIntent);

            // Create and add the list item click pending intent template.
            Intent listItemClickIntent = new Intent(context, MainActivity.class);
            listItemClickIntent.setAction(context.getString(R.string.action_item_clicked))
                    .setData(Uri.parse(listItemClickIntent.toUri(Intent.URI_INTENT_SCHEME)));

            // Set the pending intent template.
            PendingIntent clickPendingIntentTemplate = TaskStackBuilder.create(context)
                    .addNextIntentWithParentStack(listItemClickIntent)
                    .getPendingIntent(0, PendingIntent.FLAG_UPDATE_CURRENT);
            remoteView.setPendingIntentTemplate(R.id.widget_list_view, clickPendingIntentTemplate);

            // Set an empty view in case of no data.
            remoteView.setEmptyView(R.id.widget_list_view, R.id.widget_empty);

            // Call app widget manager to update the app widget instance.
            appWidgetManager.updateAppWidget(appWidgetId, remoteView);
        }

        super.onUpdate(context, appWidgetManager, appWidgetIds);
    }

    @Override
    public void onReceive(Context context, Intent intent) {
        super.onReceive(context, intent);

        // Get the intent action.
        String action = intent.getAction();
        Log.d(LOG_TAG, context.getString(R.string.log_on_receive) + action);

        // If the widget was enabled, start the sync adapter for immediate sync.
        if (AppWidgetManager.ACTION_APPWIDGET_ENABLED.equals(action)) {
            // Initialize the sync adapter and trigger an immediate sync.
            NewsSyncAdapter.initializeSyncAdapter(context);
            NewsSyncAdapter.syncImmediately(context);
        }

        // If the underlying data has been updated, notify the widgets to refresh their views
        if (context.getString(R.string.action_data_updated).equals(action)) {
            // Get the app widget manager.
            AppWidgetManager appWidgetManager = AppWidgetManager.getInstance(context);

            // Get app widget ids from the app widget manager.
            int[] appWidgetIds = appWidgetManager.getAppWidgetIds(new ComponentName(context, getClass()));

            // Notify the app widget manager that the underlying widget data has changed.
            appWidgetManager.notifyAppWidgetViewDataChanged(appWidgetIds, R.id.widget_list_view);
        }
    }
}