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。
接口说明
构造方法
常用方法
创建和使用
创建一个ToastDialog
new ToastDialog(getContext())
.setText("This is a ToastDialog")
.show();
图1 ToastDialog效果图
设置位置
new ToastDialog(getContext())
.setText("This is a ToastDialog displayed in the middle")
.setAlignment(LayoutAlignment.CENTER)
.show();
图2 设置显示位置的效果
自定义ToastDialog的Component
Java代码示例:
DirectionalLayout toastLayout = (DirectionalLayout) LayoutScatter.getInstance(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();
layout_toast.xml布局:
<?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>
其中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>
图3 自定义Component效果
场景示例
自定义视图:添加多个视图的场景。
图4 自定义多个组件的效果
layout_toast_and_image.xml代码示例:
<?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>
其中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>
Java示例代码:
DirectionalLayout layout = (DirectionalLayout) LayoutScatter.getInstance(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();