samples/browseable/LNotifications/src/com.example.android.lnotifications/HeadsUpNotificationFragment.java

/*
* Copyright 2014 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 com.example.android.lnotifications;

import android.app.Notification;
import android.app.NotificationManager;
import android.app.PendingIntent;
import android.content.Context;
import android.content.Intent;
import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.Button;
import android.widget.CheckBox;
import android.widget.Toast;

/**
 * Fragment that demonstrates options for displaying Heads-Up Notifications.
 */
public class HeadsUpNotificationFragment extends Fragment {

    /**
     * NotificationId used for the notifications from this Fragment.
     */
    private static final int NOTIFICATION_ID = 1;

    private NotificationManager mNotificationManager;

    /**
     * Button to show a notification.
     */
    private Button mShowNotificationButton;

    /**
     * If checked, notifications that this Fragment creates will be displayed as Heads-Up
     * Notifications.
     */
    private CheckBox mUseHeadsUpCheckbox;

    /**
     * Use this factory method to create a new instance of
     * this fragment using the provided parameters.
     *
     * @return A new instance of fragment NotificationFragment.
     */
    public static HeadsUpNotificationFragment newInstance() {
        HeadsUpNotificationFragment fragment = new HeadsUpNotificationFragment();
        fragment.setRetainInstance(true);
        return fragment;
    }

    public HeadsUpNotificationFragment() {
        // Required empty public constructor
    }

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        mNotificationManager = (NotificationManager) getActivity().getSystemService(Context
                .NOTIFICATION_SERVICE);
    }

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container,
                             Bundle savedInstanceState) {
        // Inflate the layout for this fragment
        return inflater.inflate(R.layout.fragment_heads_up_notification, container, false);
    }

    @Override
    public void onViewCreated(View view, Bundle savedInstanceState) {
        super.onViewCreated(view, savedInstanceState);
        mShowNotificationButton = (Button) view.findViewById(R.id.show_notification_button);
        mShowNotificationButton.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                mNotificationManager.notify(NOTIFICATION_ID, createNotification(
                        mUseHeadsUpCheckbox.isChecked()));
                Toast.makeText(getActivity(), "Show Notification clicked", Toast.LENGTH_SHORT).show();
            }
        });
        mUseHeadsUpCheckbox = (CheckBox) view.findViewById(R.id.use_heads_up_checkbox);
    }

    /**
     * Creates a new notification depending on the argument.
     *
     * @param makeHeadsUpNotification A boolean value to indicating whether a notification will be
     *                                created as a heads-up notification or not.
     *                                <ul>
     *                                <li>true : Creates a heads-up notification.</li>
     *                                <li>false : Creates a non-heads-up notification.</li>
     *                                </ul>
     *
     * @return A Notification instance.
     */
    private Notification createNotification(boolean makeHeadsUpNotification) {
        Notification.Builder notificationBuilder = new Notification.Builder(getActivity())
                .setSmallIcon(R.drawable.ic_launcher_notification)
                .setPriority(Notification.PRIORITY_DEFAULT)
                .setCategory(Notification.CATEGORY_MESSAGE)
                .setContentTitle("Sample Notification")
                .setContentText("This is a normal notification.");
        if (makeHeadsUpNotification) {
            Intent push = new Intent();
            push.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
            push.setClass(getActivity(), LNotificationActivity.class);

            PendingIntent fullScreenPendingIntent = PendingIntent.getActivity(getActivity(), 0,
                    push, PendingIntent.FLAG_CANCEL_CURRENT);
            notificationBuilder
                    .setContentText("Heads-Up Notification on Android L or above.")
                    .setFullScreenIntent(fullScreenPendingIntent, true);
        }
        return notificationBuilder.build();
    }
}