#2020征文-TV#「3.1.4 按钮」Button组件介绍和应用 原创

<?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">

    <Button
        ohos:id="$+id:btn"
        ohos:height="match_content"
        ohos:width="match_content"
        ohos:background_element="$graphic:background_button_component_example_layout"
        ohos:layout_alignment="horizontal_center"
        ohos:text="我是一个按钮"
        ohos:padding="20vp"
        ohos:text_color="#FFFFFF"
        ohos:text_size="50"
        />

</DirectionalLayout>
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    public void onStart(Intent intent) {
        super.onStart(intent);
        super.setUIContent(ResourceTable.Layout_button_component_example_layout);
        Button button = (Button) findComponentById(ResourceTable.Id_btn);
        button.setClickedListener(l -> {
            //更改Button组件的内容
            button.setText("我被点击了~");
        });
    }
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