Harmony OS — ToastDialog提示对话框

Posted 2021-07-16 王睿丶

文章目录

• • 1、ToastDialog 是什么？
  • 2、简单实用
  • 3、设置 ToastDialog
  • 4、自定义ToastDialog的Component
  • 5、实战：自定义添加多个视图的场景
  • 6、更多

1、ToastDialog 是什么？

简单：提示对话框
官方：ToastDialog是在窗口上方弹出的对话框，是通知操作的简单反馈。ToastDialog会在一段时间后消失，在此期间，用户还可以操作当前窗口的其他组件。

2、简单实用

 Button button = (Button) findComponentById(ResourceTable.Id_btn_dianwo);
        button.setClickedListener(new Component.ClickedListener() {
            @Override
            public void onClick(Component component) {
            //创建一个ToastDialog
                new ToastDialog(getContext())
                        .setText("This is a ToastDialog")
                        .show();
            }
        });

    <Button
        ohos:id="$+id:btn_dianwo"
        ohos:height="match_content"
        ohos:width="match_parent"
        ohos:layout_alignment="center"
        ohos:text="点我"
        ohos:margin="40fp"
        ohos:text_size="25fp"
        ohos:background_element="#FF53C3DE"/>

3、设置 ToastDialog

（1）设置位置

new ToastDialog(getContext())
    .setText("This is a ToastDialog displayed in the middle")
    .setAlignment(LayoutAlignment.CENTER)
    .show();

4、自定义ToastDialog的Component

新建：layout_toast.xml

<?xml version="1.0" encoding="utf-8"?>
<DirectionalLayout
    xmlns:ohos="http://schemas.huawei.com/res/ohos"
    ohos:height="match_content"
    ohos:width="match_content"
    ohos:orientation="vertical">
    <Text
        ohos:id="$+id:msg_toast"
        ohos:height="match_content"
        ohos:width="match_content"
        ohos:left_padding="16vp"
        ohos:right_padding="16vp"
        ohos:top_padding="4vp"
        ohos:bottom_padding="4vp"
        ohos:layout_alignment="center"
        ohos:text_size="16fp"
        ohos:text="This is a ToastDialog for the customized component"
        ohos:background_element="$graphic:background_toast_element"/>
</DirectionalLayout>    

background_toast_element.xml

<?xml version="1.0" encoding="utf-8"?>
<shape xmlns:ohos="http://schemas.huawei.com/res/ohos"
       ohos:shape="rectangle">
    <corners
        ohos:radius="30vp"/>
    <solid
        ohos:color="#66808080"/>
</shape>

Button button = (Button) findComponentById(ResourceTable.Id_btn_dianwo);
        button.setClickedListener(new Component.ClickedListener() {
            @Override
            public void onClick(Component component) {
            //自定义ToastDialog的Component
                DirectionalLayout toastLayout = (DirectionalLayout) LayoutScatter.getInstance(MainAbilitySlice.this)
                        .parse(ResourceTable.Layout_layout_toast, null, false);
                new ToastDialog(getContext())
                        .setContentCustomComponent(toastLayout)
                        .setSize(DirectionalLayout.LayoutConfig.MATCH_CONTENT, DirectionalLayout.LayoutConfig.MATCH_CONTENT)
                        .setAlignment(LayoutAlignment.CENTER)
                        .show();
            }
        });

5、实战：自定义添加多个视图的场景

新建：layout_toast_and_image.xml

<?xml version="1.0" encoding="utf-8"?>
<DirectionalLayout
    xmlns:ohos="http://schemas.huawei.com/res/ohos"
    ohos:height="match_content"
    ohos:width="match_content"
    ohos:orientation="horizontal">

    <Image
        ohos:width="30vp"
        ohos:height="30vp"
        ohos:scale_mode="inside"
        ohos:image_src="$media:icon"/>

    <Text
        ohos:id="$+id:msg_toast"
        ohos:height="match_content"
        ohos:width="match_content"
        ohos:background_element="$graphic:background_toast_element"
        ohos:bottom_padding="4vp"
        ohos:layout_alignment="vertical_center"
        ohos:left_padding="16vp"
        ohos:right_padding="16vp"
        ohos:text="This is a ToastDialog with An Image"
        ohos:text_size="16fp"
        ohos:top_padding="4vp"/>
</DirectionalLayout>

background_toast_element.xml

<?xml version="1.0" encoding="utf-8"?>
<shape xmlns:ohos="http://schemas.huawei.com/res/ohos"
       ohos:shape="rectangle">
    <corners
        ohos:radius="30vp"/>
    <solid
        ohos:color="#66808080"/>
</shape>

        Button button = (Button) findComponentById(ResourceTable.Id_btn_dianwo);
        button.setClickedListener(new Component.ClickedListener() {
            @Override
            public void onClick(Component component) {
                DirectionalLayout layout = (DirectionalLayout) LayoutScatter.getInstance(MainAbilitySlice.this)
                        .parse(ResourceTable.Layout_layout_toast_and_image, null, false);
                new ToastDialog(getContext())
                        .setContentCustomComponent(layout)
                        .setSize(DirectionalLayout.LayoutConfig.MATCH_CONTENT, DirectionalLayout.LayoutConfig.MATCH_CONTENT)
                        .setAlignment(LayoutAlignment.CENTER)
                        .show();
            }
        });

6、更多

ToastDialog 更多