【Android】15.5 例15-3—Notification的各种属性演示

分类：C#、Android、VS2015；

创建日期：2016-02-29

一、简介

利用这个例子，可测试通知的各种属性以及这些不同属性选项呈现的效果。

另外，在这个例子中，还演示了如何读写SD中的图像文件。

二、示例3运行截图

 

三、主要设计步骤

本示例使用了下面的图像文件：

ch1503_monkey_icon.png

ch1503_notification.png

ch1503_x_bldg.jpg

如果你不想使用这些文件，也可以用其他的图像文件代替。

1、添加ch1503arrays.xml

在values文件夹下添加该文件。

<?xml version="1.0" encoding="utf-8"?>
<resources>
    <string-array name="notification_style">
        <item>Normal</item>
        <item>Big Text</item>
        <item>Inbox</item>
        <item>Image</item>
    </string-array>
    <string-array name="notification_visibility">
        <item>Public</item>
        <item>Private</item>
        <item>Secret</item>
    </string-array>
    <string-array name="notification_priority">
        <item>Default</item>
        <item>High</item>
        <item>Low</item>
        <item>Maximum</item>
        <item>Minimum</item>
    </string-array>
    <string-array name="notification_category">
        <item>Call</item>
        <item>Message</item>
        <item>Alarm</item>
        <item>Email</item>
        <item>Event</item>
        <item>Promo</item>
        <item>Progress</item>
        <item>Social</item>
        <item>Error</item>
        <item>Transport</item>
        <item>System</item>
        <item>Service</item>
        <item>Recommendation</item>
        <item>Status</item>
    </string-array>
</resources>

2、添加权限（如果已经有这些权限就不用添加了）

在AndroidManifest.xml文件中添加下面的权限（允许震动、允许读取外部存储）：

<uses-permission android:name="android.permission.VIBRATE" />
<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />

3、添加ch1503_Main.axml

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical"
    android:gravity="center_horizontal"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent">
    <TextView
        android:id="@+id/textView1"
        android:layout_width="300dp"
        android:layout_height="wrap_content"
        android:layout_marginTop="10dp"
        android:layout_marginBottom="5dp"
        android:gravity="center_horizontal"
        android:textAppearance="?android:attr/textAppearanceMedium"
        android:text="这是通知的标题" />
    <EditText
        android:id="@+id/notifyText"
        android:layout_width="300dp"
        android:layout_height="100dp"
        android:layout_marginBottom="8dp"
        android:layout_below="@+id/textView1"
        android:singleLine="false"
        android:textAppearance="?android:attr/textAppearanceSmall"
        android:text="这是通知的详细信息。" />
    <TextView
        android:id="@+id/textViewStyle"
        android:layout_width="100dp"
        android:layout_height="35dp"
        android:layout_gravity="center_horizontal"
        android:layout_marginRight="10dp"
        android:layout_marginBottom="2dp"
        android:layout_below="@+id/notifyText"
        android:gravity="right"
        android:textAppearance="?android:attr/textAppearanceMedium"
        android:text="Style:" />
    <Spinner
        android:layout_width="150dp"
        android:layout_height="35dp"
        android:layout_gravity="center_horizontal"
        android:layout_marginBottom="2dp"
        android:layout_below="@+id/notifyText"
        android:layout_toRightOf="@+id/textViewStyle"
        android:layout_alignBaseline="@+id/textViewStyle"
        android:id="@+id/styleSpinner" />
    <TextView
        android:id="@+id/textViewVisibility"
        android:layout_width="100dp"
        android:layout_height="35dp"
        android:layout_gravity="center_horizontal"
        android:layout_marginRight="10dp"
        android:layout_marginBottom="2dp"
        android:layout_below="@+id/styleSpinner"
        android:gravity="right"
        android:textAppearance="?android:attr/textAppearanceMedium"
        android:text="Visibility:" />
    <Spinner
        android:layout_width="150dp"
        android:layout_height="35dp"
        android:layout_gravity="center_horizontal"
        android:layout_marginBottom="2dp"
        android:layout_below="@+id/styleSpinner"
        android:layout_toRightOf="@+id/textViewVisibility"
        android:layout_alignBaseline="@+id/textViewVisibility"
        android:id="@+id/visibilitySpinner" />
    <TextView
        android:id="@+id/textViewPriority"
        android:layout_width="100dp"
        android:layout_height="35dp"
        android:layout_gravity="center_horizontal"
        android:layout_marginRight="10dp"
        android:layout_marginBottom="2dp"
        android:layout_below="@+id/visibilitySpinner"
        android:gravity="right"
        android:textAppearance="?android:attr/textAppearanceMedium"
        android:text="Priority:" />
    <Spinner
        android:layout_width="150dp"
        android:layout_height="35dp"
        android:layout_gravity="center_horizontal"
        android:layout_marginBottom="2dp"
        android:layout_below="@+id/visibilitySpinner"
        android:layout_toRightOf="@+id/textViewPriority"
        android:layout_alignBaseline="@+id/textViewPriority"
        android:id="@+id/prioritySpinner" />
    <TextView
        android:id="@+id/textViewCategory"
        android:layout_width="100dp"
        android:layout_height="35dp"
        android:layout_gravity="center_horizontal"
        android:layout_marginRight="10dp"
        android:layout_marginBottom="10dp"
        android:layout_below="@+id/prioritySpinner"
        android:gravity="right"
        android:textAppearance="?android:attr/textAppearanceMedium"
        android:text="Category:" />
    <Spinner
        android:layout_width="150dp"
        android:layout_height="35dp"
        android:layout_gravity="center_horizontal"
        android:layout_marginBottom="10dp"
        android:layout_below="@+id/prioritySpinner"
        android:layout_toRightOf="@+id/textViewCategory"
        android:layout_alignBaseline="@+id/textViewCategory"
        android:id="@+id/categorySpinner" />
    <Switch
        android:layout_width="200dp"
        android:layout_height="wrap_content"
        android:layout_gravity="center_horizontal"
        android:gravity="right"
        android:layout_marginBottom="10dp"
        android:layout_below="@+id/categorySpinner"
        android:textAppearance="?android:attr/textAppearanceMedium"
        android:text="Large Icon:"
        android:id="@+id/largeIconSwitch" />
    <Switch
        android:layout_width="200dp"
        android:layout_height="wrap_content"
        android:layout_gravity="center_horizontal"
        android:gravity="right"
        android:layout_marginBottom="10dp"
        android:layout_below="@+id/largeIconSwitch"
        android:textAppearance="?android:attr/textAppearanceMedium"
        android:text="Sound:"
        android:id="@+id/soundSwitch" />
    <Switch
        android:layout_width="200dp"
        android:layout_height="wrap_content"
        android:layout_gravity="center_horizontal"
        android:gravity="right"
        android:layout_below="@+id/soundSwitch"
        android:textAppearance="?android:attr/textAppearanceMedium"
        android:text="Vibrate:"
        android:id="@+id/vibrateSwitch" />
    <Button
        android:text="发送通知"
        android:layout_width="300dp"
        android:layout_height="wrap_content"
        android:layout_marginTop="25dp"
        android:layout_below="@+id/vibrateSwitch"
        android:id="@+id/launchButton" />
</RelativeLayout>

4、添加ch1503_Second.axml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:minWidth="25px"
    android:minHeight="25px">
    <TextView
        android:text=""
        android:layout_width="300dp"
        android:layout_height="wrap_content"
        android:layout_marginTop="10dp"
        android:gravity="center_horizontal"
        android:textAppearance="?android:attr/textAppearanceLarge"
        android:id="@+id/textView1" />
</LinearLayout>

5、添加ch1503SecondActivity.cs

using Android.App;
using Android.Content;
using Android.OS;
using Android.Widget;

namespace MyDemos.SrcDemos
{
    [Activity(Label = "ch1503SecondActivity")]
    public class ch1503SecondActivity : Activity
    {
        protected override void OnCreate(Bundle savedInstanceState)
        {
            base.OnCreate(savedInstanceState);
            string message = Intent.Extras.GetString("message", "");
            SetContentView(Resource.Layout.ch1503_Second);
            TextView textView = FindViewById<TextView>(Resource.Id.textView1);
            textView.Text = string.Format("传递到SecondActivity的消息是：
 {0}", message);
        }
    }
}

6、添加ch1503MainActivity.cs

using System;
using Android.App;
using Android.Content;
using Android.OS;
using Android.Widget;
using Android.Graphics;

namespace MyDemos.SrcDemos
{
    [Activity(Label = "【例15-3】通知的各种基本用法")]
    public class ch1503MainActivity : Activity
    {
        EditText notifyMsg;
        protected override void OnCreate(Bundle savedInstanceState)
        {
            base.OnCreate(savedInstanceState);
            SetContentView(Resource.Layout.ch1503_Main);

            var notificationManager = GetSystemService(NotificationService) as NotificationManager;

            // 可在文本框中直接编辑通知消息：
            notifyMsg = FindViewById<EditText>(Resource.Id.notifyText);

            #region 设置在Resources/values/arrays.xml中定义的下拉框（Spinners）
            //样式下拉框
            Spinner styleSpinner = FindViewById<Spinner>(Resource.Id.styleSpinner);
            var styleAdapter = ArrayAdapter.CreateFromResource(this,
                Resource.Array.notification_style,
                Android.Resource.Layout.SimpleSpinnerDropDownItem);
            styleSpinner.Adapter = styleAdapter;
            // 选择下拉框时控制文本框的样式:
            styleSpinner.ItemSelected += new EventHandler<AdapterView.ItemSelectedEventArgs>(styleSpinnerSelected);

            //可见性下拉框
            Spinner visibilitySpinner = FindViewById<Spinner>(Resource.Id.visibilitySpinner);
            var visibilityAdapter = ArrayAdapter.CreateFromResource(this,
                Resource.Array.notification_visibility,
                Android.Resource.Layout.SimpleSpinnerDropDownItem);
            visibilitySpinner.Adapter = visibilityAdapter;

            //优先级下拉框
            Spinner prioritySpinner = FindViewById<Spinner>(Resource.Id.prioritySpinner);
            var priorityAdapter = ArrayAdapter.CreateFromResource(this,
                Resource.Array.notification_priority,
                Android.Resource.Layout.SimpleSpinnerDropDownItem);
            prioritySpinner.Adapter = priorityAdapter;

            // 分类下拉框
            Spinner categorySpinner = FindViewById<Spinner>(Resource.Id.categorySpinner);
            var categoryAdapter = ArrayAdapter.CreateFromResource(this,
                Resource.Array.notification_category,
                Android.Resource.Layout.SimpleSpinnerDropDownItem);
            categorySpinner.Adapter = categoryAdapter;
            #endregion

            #region 选项开关
            // 获取布局中的大图标、声音、振动开关:
            Switch largeIconSw = FindViewById<Switch>(Resource.Id.largeIconSwitch);
            Switch soundSw = FindViewById<Switch>(Resource.Id.soundSwitch);
            Switch vibrateSw = FindViewById<Switch>(Resource.Id.vibrateSwitch);
            #endregion

            #region 执行通知的按钮
            Button launchBtn = FindViewById<Button>(Resource.Id.launchButton);
            launchBtn.Click += delegate
            {
                Notification.Builder builder = new Notification.Builder(this)
                    .SetContentTitle("Sample Notification")
                    .SetContentText(notifyMsg.Text)
                    .SetSmallIcon(Resource.Drawable.ch1503_notification)
                    .SetAutoCancel(true);

                if (largeIconSw.Checked)
                    builder.SetLargeIcon(BitmapFactory.DecodeResource(Resources, Resource.Drawable.ch1503_monkey_icon));

                switch (styleSpinner.SelectedItem.ToString())
                {
                    case "Big Text":
                        builder.SetContentTitle("Big Text Notification");
                        var textStyle = new Notification.BigTextStyle();
                        textStyle.BigText(notifyMsg.Text);
                        textStyle.SetSummaryText("The summary text goes here.");
                        builder.SetStyle(textStyle);
                        break;
                    case "Inbox":
                        var inboxStyle = new Notification.InboxStyle();
                        builder.SetContentTitle("5 条新消息");
                        builder.SetContentText("abc@126.com");
                        inboxStyle.AddLine("张三：香蕉便宜了");
                        inboxStyle.AddLine("李四：那事咋样了");
                        inboxStyle.AddLine("王五：别忘了给我回邮件");
                        inboxStyle.SetSummaryText("+2 more");
                        builder.SetStyle(inboxStyle);
                        break;
                    case "Image":
                        builder.SetContentTitle("Image Notification");
                        var picStyle = new Notification.BigPictureStyle();

                        //用法1
                        picStyle.BigPicture(BitmapFactory.DecodeResource(Resources, Resource.Drawable.ch1503_x_bldg));
                        picStyle.SetSummaryText("The summary text goes here.");

                        // 用法2（从SD卡中读取图像）
                        // BitmapFactory.Options options = new BitmapFactory.Options();
                        // options.InSampleSize = 2;
                        // string imagePath = "/sdcard/Pictures/my-tshirt.jpg";
                        // picStyle.BigPicture(BitmapFactory.DecodeFile(imagePath, options));
                        // picStyle.SetSummaryText("Check out my new T-shirt!");

                        builder.SetStyle(picStyle);
                        break;
                    default:
                        // 使用默认的通知样式
                        break;
                }

                switch (visibilitySpinner.SelectedItem.ToString())
                {
                    case "Public": builder.SetVisibility(NotificationVisibility.Public); break;
                    case "Private": builder.SetVisibility(NotificationVisibility.Private); break;
                    case "Secret": builder.SetVisibility(NotificationVisibility.Secret); break;
                }

                switch (prioritySpinner.SelectedItem.ToString())
                {
                    case "High": builder.SetPriority((int)NotificationPriority.High); break;
                    case "Low": builder.SetPriority((int)NotificationPriority.Low); break;
                    case "Maximum": builder.SetPriority((int)NotificationPriority.Max); break;
                    case "Minimum": builder.SetPriority((int)NotificationPriority.Min); break;
                    default: builder.SetPriority((int)NotificationPriority.Default); break;
                }

                switch (categorySpinner.SelectedItem.ToString())
                {
                    case "Call": builder.SetCategory(Notification.CategoryCall); break;
                    case "Message": builder.SetCategory(Notification.CategoryMessage); break;
                    case "Alarm": builder.SetCategory(Notification.CategoryAlarm); break;
                    case "Email": builder.SetCategory(Notification.CategoryEmail); break;
                    case "Event": builder.SetCategory(Notification.CategoryEvent); break;
                    case "Promo": builder.SetCategory(Notification.CategoryPromo); break;
                    case "Progress": builder.SetCategory(Notification.CategoryProgress); break;
                    case "Social": builder.SetCategory(Notification.CategorySocial); break;
                    case "Error": builder.SetCategory(Notification.CategoryError); break;
                    case "Transport": builder.SetCategory(Notification.CategoryTransport); break;
                    case "System": builder.SetCategory(Notification.CategorySystem); break;
                    case "Service": builder.SetCategory(Notification.CategoryService); break;
                    case "Recommendation": builder.SetCategory(Notification.CategoryRecommendation); break;
                    case "Status": builder.SetCategory(Notification.CategoryStatus); break;
                    default: builder.SetCategory(Notification.CategoryStatus); break;
                }
                #endregion

                Intent secondIntent = new Intent(this, typeof(ch1503SecondActivity));
                secondIntent.PutExtra("message", notifyMsg.Text);
                TaskStackBuilder stackBuilder = TaskStackBuilder.Create(this);
                stackBuilder.AddParentStack(Java.Lang.Class.FromType(typeof(ch1503SecondActivity)));
                stackBuilder.AddNextIntent(secondIntent);
                const int pendingIntentId = 0;
                PendingIntent pendingIntent = stackBuilder.GetPendingIntent(pendingIntentId, PendingIntentFlags.OneShot);

                // 下面的代码用于从通知返回到MainActivity
                // Intent intent = new Intent (this, typeof(MainActivity));
                // const int pendingIntentId = 0;
                // pendingIntent = PendingIntent.GetActivity (this, pendingIntentId, intent, PendingIntentFlags.OneShot);
                // builder.SetContentText("Hello World! This is my first action notification!");

                builder.SetContentIntent(pendingIntent);

                Notification notification = builder.Build();
                if (soundSw.Checked) notification.Defaults |= NotificationDefaults.Sound;
                if (vibrateSw.Checked) notification.Defaults |= NotificationDefaults.Vibrate;
                const int notificationId = 1;
                notificationManager.Notify(notificationId, notification);

                // 下面的代码用于5秒后更新通知
                // Thread.Sleep(5000);
                // builder.SetContentTitle("Updated Notification");
                // builder.SetContentText("Changed to this message after five seconds.");
                // notification = builder.Build();
                // notificationManager.Notify(notificationId, notification);
            };
        }

        private void styleSpinnerSelected(object sender, AdapterView.ItemSelectedEventArgs e)
        {
            Spinner spinner = sender as Spinner;
            switch (spinner.SelectedItem.ToString())
            {
                case "Big Text":
                    notifyMsg.Text = "这是通知消息。你可以在文本框中修改要发送的消息，";
                    notifyMsg.Text += "然后单击发送消息按钮观察效果。";
                    break;
                case "Big Picture":
                    notifyMsg.Text = "该通知包含一个图像。发送通知后，可下拉通知观察图像。";
                    break;
                case "Inbox":
                    notifyMsg.Text = "该通知包含邮件消息的摘要。发送通知后，可下拉通知观察这些摘要。";
                    break;
                default:
                    notifyMsg.Text = "Notification message text goes here.";
                    break;
            }
        }
    }
}