1.问题展示

0.理想效果

错误效果:

1.首页展示页面 (未点击按钮前)

2.点击按钮之后，弹窗不在同一个位置

2.代码展示

1.点击按钮的

<?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:alignment="center"
    ohos:orientation="vertical">

    <Button
        ohos:id="$+id:btn1"
        ohos:height="match_content"
        ohos:width="match_content"
        ohos:background_element="red"
        ohos:text="点我展示土司弹窗"
        ohos:text_size="40fp"
        />

</DirectionalLayout>

2内嵌的页面

<?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:ts_text"
        ohos:height="match_content"
        ohos:width="match_content"
        ohos:text_size="30fp"

        ohos:text_alignment="center"
        ohos:background_element="red"/>


</DirectionalLayout>

3.工具类

package com.jsxs.dialogapplication.toastutil;

import com.jsxs.dialogapplication.ResourceTable;
import ohos.agp.components.Component;
import ohos.agp.components.DirectionalLayout;
import ohos.agp.components.LayoutScatter;
import ohos.agp.components.Text;
import ohos.agp.text.Layout;
import ohos.agp.utils.LayoutAlignment;
import ohos.agp.window.dialog.ToastDialog;
import ohos.app.Context;


public class toast {
    public static void showToast(Context context,String message){
        // 1.读取xml文件
        DirectionalLayout dl = (DirectionalLayout) LayoutScatter.getInstance(context).parse(ResourceTable.Layout_ability_toast, null, false);
        Text toast_ts = (Text) dl.findComponentById(ResourceTable.Id_ts_text);
        // 2.对文本进行赋值
        toast_ts.setText(message);

        // 3.创建一个土司对象
        ToastDialog td = new ToastDialog(context);
        td.setAlignment(LayoutAlignment.BOTTOM);  // 居中对其
        td.setSize(DirectionalLayout.LayoutConfig.MATCH_CONTENT,DirectionalLayout.LayoutConfig.MATCH_CONTENT);

        td.setDuration(2000);  // 出现的时长
        // 4.将我们自定义的组件放入到我们的土司弹窗中
        td.setContentCustomComponent(dl);
        // 5.让弹窗展示
        td.show();

    }
}

4.主类调用

package com.jsxs.dialogapplication.slice;

import com.jsxs.dialogapplication.ResourceTable;
import com.jsxs.dialogapplication.toastutil.toast;
import ohos.aafwk.ability.AbilitySlice;
import ohos.aafwk.content.Intent;
import ohos.agp.components.*;
import ohos.agp.utils.LayoutAlignment;
import ohos.agp.window.dialog.CommonDialog;
import ohos.agp.window.dialog.IDialog;
import ohos.agp.window.dialog.ToastDialog;

public class MainAbilitySlice extends AbilitySlice implements Component.ClickedListener {
    @Override
    public void onStart(Intent intent) {
        super.onStart(intent);
        super.setUIContent(ResourceTable.Layout_ability_main);

        // 1.找到我们的按钮
        Button button = (Button) this.findComponentById(ResourceTable.Id_btn1);

        // 2.给按钮添加我们的点击事件
        button.setClickedListener(this);
    }

    @Override
    public void onActive() {
        super.onActive();
    }

    @Override
    public void onForeground(Intent intent) {
        super.onForeground(intent);
    }

    @Override
    public void onClick(Component component) {
        toast.showToast(this,"无法找到当前位置");  // ⭐
    }
}

3.问题分析

因为我们有两个组件，且两个组件的 width 和 height 都是match_parent占据了整个屏幕。所以每次我们使用一个xml组件的时候，每一个都会占据一个整个页面。问题就在于这,解决办法就是将 两个xml的DirectionalLayout更改成自适应 match_content 即可 。

<DirectionalLayout
    xmlns:ohos="http://schemas.huawei.com/res/ohos"
    ohos:height="match_content"   ✅✅✅✅✅✅
    ohos:width="match_content"    ✅✅✅✅✅✅
    ohos:orientation="vertical">
</DirectionalLayout>