Harmony OS — ToastDialog提示對話框

文章目錄

• • 1、ToastDialog 是什麼？
  • 2、簡單實用
  • 3、設定 ToastDialog
  • 4、自定義ToastDialog的Component
  • 5、實戰：自定義添加多個視圖的場景
  • 6、更多

1、ToastDialog 是什麼？

簡單：提示對話框

官方：ToastDialog是在視窗上方彈出的對話框，是通知操作的簡單回報。ToastDialog會在一段時間後消失，在此期間，使用者還可以操作目前視窗的其他元件。

2、簡單實用

Button button = (Button) findComponentById(ResourceTable.Id_btn_dianwo);
        button.setClickedListener(new Component.ClickedListener() {
            @Override
            public void onClick(Component component) {
            //建立一個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="點我"
        ohos:margin="40fp"
        ohos:text_size="25fp"
        ohos:background_element="#FF53C3DE"/>
           

3、設定 ToastDialog

（1）設定位置

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

4、自定義ToastDialog的Component

建立：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) {
            //自定義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、實戰：自定義添加多個視圖的場景

建立：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