Question

在所有布局上，我有一个共同的页眉和页脚，如何在运行时更改布局？

main_latout.xml -

    <RelativeLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent" >

<include 
    android:id="@+id/header"
    layout="@layout/mytask_header"
    android:layout_width="fill_parent"
    android:layout_height="60dp"
    android:layout_alignParentTop="true"/>

<include 
    android:id="@+id/footer"
    layout="@layout/mytask_footer_ads"
    android:layout_width="fill_parent"
    android:layout_height="60dp"
    android:layout_alignParentBottom="true"/>

<RelativeLayout 
    android:id="@+id/common_place_for_xml"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:layout_below="@id/header"
    android:layout_above="@id/footer"
    android:background="@android:color/darker_gray">

</RelativeLayout>

</RelativeLayout>

我想更改ID为RelativeLayout的{{1}}中的其他布局？我是新手？请帮忙。

Answer 1

不确定我是否理解你想要的东西，但我会尽力帮助。

尝试为您的外部RelativeLayout提供一个id，例如“parentLayout”，另一个名为newLayout的XML文件将替换您的“common_place_for_xml”布局。

然后在运行时尝试：

RelativeLayout parentLayout = findViewById(R.id.parentLayout);
RelativeLayout childLayout = parentLayout.findViewById(R.id.common_place_for_xml);
RelativeLayout.LayoutParams params = (RelativeLayout.LayoutParams) childLayout.getLayoutParams();
int index = parentLayout.indexOfChild(childLayout);
parentLayout.removeView(childLayout);
RelativeLayout newLayout = findViewById(R.id.newLayout);
parentLayout.addView(newLayout, index);
newLayout.setLayoutParams(params);

Answer 2

您可以在运行时向相对布局添加视图。这是一个示例：

RelativeLayout relativeLayout = (RelativeLayout) findViewById(R.id.common_place_for_xml);
RelativeLayout.LayoutParams params = new RelativeLayout.LayoutParams(
            RelativeLayout.LayoutParams.WRAP_CONTENT,
            RelativeLayout.LayoutParams.WRAP_CONTENT);
Button dummy = new Button(this);
dummy.setText("Hello");
dummy.setLayoutParams(params);
relativeLayout.addView(dummy);

添加子布局保持页眉和页脚在android中的所有布局上通用

2 个答案: