【HarmonyOS】【JAVA UI】自定义通知的实现

 我们怎么实现自定义通知呢？今天写一个demo作为经验分享，我们从以下五个步骤进行描述

1.      绘画基本界面

2.     自定义通知的view界面

3.     代码层实现view的实现设置Text文字，设置Image图片

4.     运行效果

在开发中基本通知我们可以参考资料：

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第一步：绘画基本界面

1.1我们在布局绘画一个Text用于触发发布通知 xml代码如下

<?xml version="1.0" encoding="utf-8"?>
<DirectionalLayout
    xmlns:ohos="http://schemas.huawei.com/res/ohos"
    ohos:height="match_parent"
    ohos:width="match_parent"
    ohos:orientation="vertical">
 
    <Text
        ohos:id="$+id:PushNotification"
        ohos:height="100vp"
        ohos:width="match_parent"
        ohos:background_element="#ed6262"
        ohos:layout_alignment="horizontal_center"
        ohos:text="发布通知"
        ohos:text_color="#ffffff"
        ohos:text_alignment="center"
        ohos:text_size="40vp"
        />
 
</DirectionalLayout>

第二步：自定义通知的view界面

自定义通知布局，新建一个xml 布局名称notification_view.xml 需要设置remote为true

代码如下

<?xml version="1.0" encoding="utf-8"?>
<DirectionalLayout
    xmlns:ohos="http://schemas.huawei.com/res/ohos"
    ohos:height="100vp"
    ohos:width="match_parent"
    ohos:orientation="horizontal"
    ohos:remote="true">
<Image
    ohos:left_margin="30px"
    ohos:id="$+id:myImage"
    ohos:height="50vp"
    ohos:width="50vp"
    ohos:image_src="$media:icon"/>
    <DirectionalLayout
        ohos:height="match_parent"
        ohos:width="match_parent"
        ohos:orientation="vertical">
        <Text
            ohos:id="$+id:title"
            ohos:height="0fp"
            ohos:weight="1"
            ohos:left_padding="20fp"
            ohos:text_size="30fp"
            ohos:text="通知标题"
            ohos:text_alignment="center|left"
            ohos:width="match_parent"/>
        <Text
            ohos:left_padding="20fp"
            ohos:height="0fp"
            ohos:weight="1"
            ohos:text_size="20fp"
            ohos:text="通知内容"
            ohos:text_alignment="center|left"
            ohos:width="match_parent"/>
 
    </DirectionalLayout>
 
</DirectionalLayout>

效果如下

第三步 代码层实现view的实现设置Text文字，设置Image图片

3.1 使用ComponentProvider加载布局代码如下

ComponentProvider remoteView = new ComponentProvider(ResourceTable.Layout_notification_view, this);

3.2设置文字

   //todo 通知设置文字
 
        remoteView.setTextColor(ResourceTable.Id_title, new Color(0xFFFF0000));
        remoteView.setFloat(ResourceTable.Id_title, "setTextSize", 20);
        remoteView.setString(ResourceTable.Id_title, "setText", "这是通知标题");

3.2使用setImageContent的api设置图片资源，

准备工作

1）在resources/base/media 文件存放一个图片为myicon.png图片，结构如下

2）我们需要在resources/base/profile文件新建一个名为remote.xml文件，图片如下

3）romote.xml

<?xml version="1.0" encoding="UTF-8"?>
<remoteresources>
    <item>$media:myicon</item>
</remoteresources>

4）Java代码设置图片

  remoteView.setImageContent(ResourceTable.Id_myImage, ResourceTable.Media_myicon);

5）通知代码实现

  NotificationRequest.NotificationNormalContent content = new NotificationRequest.NotificationNormalContent();
        NotificationRequest.NotificationContent notificationContent = new NotificationRequest.NotificationContent(content);
        NotificationRequest request = new NotificationRequest(this, 1);
        request.setContent(notificationContent).setCustomView(remoteView);

6）全部代码如下

public class MainAbilitySlice extends AbilitySlice  {
    private Text PushNotification;
    private String event = "com.utils.test";
    static final HiLogLabel LABEL = new HiLogLabel(HiLog.LOG_APP, 0x00201, "######");
    @Override
    public void onStart(Intent intent) {
        super.onStart(intent);
        super.setUIContent(ResourceTable.Layout_ability_main);
        PushNotification = findComponentById(ResourceTable.Id_PushNotification);
        ComponentProvider remoteView = new ComponentProvider(ResourceTable.Layout_notification_view, this);
        //todo 通知设置文字
        remoteView.setTextColor(ResourceTable.Id_title, new Color(0xFFFF0000));
        remoteView.setFloat(ResourceTable.Id_title, "setTextSize", 20);
        remoteView.setString(ResourceTable.Id_title, "setText", "这是通知标题");
        //todo 通知设置图片
        remoteView.setImageContent(ResourceTable.Id_myImage, ResourceTable.Media_myicon);
 
        NotificationRequest.NotificationNormalContent content = new NotificationRequest.NotificationNormalContent();
        NotificationRequest.NotificationContent notificationContent = new NotificationRequest.NotificationContent(content);
        NotificationRequest request = new NotificationRequest(this, 1);
        request.setContent(notificationContent).setCustomView(remoteView);
        PushNotification.setClickedListener(new Component.ClickedListener() {
            @Override
            public void onClick(Component component) {
                try {
                    NotificationHelper.publishNotification(request);
                } catch (ohos.rpc.RemoteException ex) {
                    HiLog.error(LABEL, ex.getLocalizedMessage());
                }
            }
        });
    }}

第四步：效果图如下

更多相关学习资料：
https://developer.huawei.com/consumer/cn/forum/topic/0201768617076660043?fid=0102683795438680754?ha_source=zzh