Post notification after fetching articles

chrome/android/java/src/org/chromium/chrome/browser/ntp/ContentSuggestionsNotificationHelper.java

 // Copyright 2016 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 package org.chromium.chrome.browser.ntp;
 
+import android.app.NotificationManager;
+import android.app.PendingIntent;
 import android.content.Context;
 import android.content.Intent;
+import android.graphics.Bitmap;
 import android.net.Uri;
 import android.provider.Browser;
+import android.support.v4.app.NotificationCompat;
 
 import org.chromium.base.ContextUtils;
 import org.chromium.base.annotations.CalledByNative;
+import org.chromium.chrome.R;
 import org.chromium.chrome.browser.IntentHandler;
 import org.chromium.chrome.browser.ShortcutHelper;
 import org.chromium.chrome.browser.document.ChromeLauncherActivity;
 
 /**
  * Provides functionality needed for content suggestion notifications.
  *
  * Exposes helper functions to native C++ code.
  */
 public class ContentSuggestionsNotificationHelper {
+    private static final String NOTIFICATION_TAG = "ContentSuggestionsNotification";
+    private static final int NOTIFICATION_ID = 0;
+
     private ContentSuggestionsNotificationHelper() {} // Prevent instantiation
 
     @CalledByNative
     private static void openUrl(String url) {
         Context context = ContextUtils.getApplicationContext();
         Intent intent = new Intent();
         intent.setAction(Intent.ACTION_VIEW);
         intent.setData(Uri.parse(url));
         intent.setClass(context, ChromeLauncherActivity.class);
         intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
         intent.putExtra(Browser.EXTRA_APPLICATION_ID, context.getPackageName());
         intent.putExtra(ShortcutHelper.REUSE_URL_MATCHING_TAB_ELSE_NEW_TAB, true);
         IntentHandler.addTrustedIntentExtras(intent, context);
         context.startActivity(intent);
     }
+
+    @CalledByNative
+    private static void showNotification(String url, String title, String text, Bitmap image) {
+        Context context = ContextUtils.getApplicationContext();
+        NotificationManager manager =
+                (NotificationManager) context.getSystemService(Context.NOTIFICATION_SERVICE);
+        Intent intent = new Intent()
+                                .setAction(Intent.ACTION_VIEW)
+                                .setData(Uri.parse(url))
+                                .setClass(context, ChromeLauncherActivity.class)
+                                .putExtra(ShortcutHelper.REUSE_URL_MATCHING_TAB_ELSE_NEW_TAB, true)
+                                .putExtra(Browser.EXTRA_APPLICATION_ID, context.getPackageName());
+        NotificationCompat.Builder builder =
+                new NotificationCompat.Builder(context)
+                        .setAutoCancel(true)
+                        .setContentIntent(PendingIntent.getActivity(context, 0, intent, 0))
+                        .setContentTitle(title)
+                        .setContentText(text)
+                        .setLargeIcon(image)
+                        .setSmallIcon(R.drawable.ic_chrome);
+        manager.notify(NOTIFICATION_TAG, NOTIFICATION_ID, builder.build());
+    }
+
+    @CalledByNative
+    private static void hideNotification() {
+        Context context = ContextUtils.getApplicationContext();
+        NotificationManager manager =
+                (NotificationManager) context.getSystemService(Context.NOTIFICATION_SERVICE);
+        manager.cancel(NOTIFICATION_TAG, NOTIFICATION_ID);
+    }
 }