findViewById工作不适合的包括哪些内容？ [英] findViewById not working for an include?

问题描述

我有一个包括像：

<include
    android:id="@+id/placeHolder"
    layout="@layout/test" />

在包括布局看起来像（的test.xml）：

The include layout looks like (test.xml):

<?xml version="1.0" encoding="utf-8"?>

<FrameLayout 
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:id="@+id/outer"
    ... >

    <ImageView
        android:id="@+id/inner"
        ... />
</FrameLayout>

我似乎无法找到ID =内心在运行时内ImageView的：

I can't seem to find the inner ImageView with id="inner" at runtime:

ImageView iv = (ImageView)findViewById(R.id.inner);
if (iv == null) {
    Log.e(TAG, "Not found!");
}

我应该能找到它？这似乎是因为它使用的是有，正常的findViewById方法是行不通的。

Should I be able to find it? It seems like since it's using an "include", the normal findViewById method does not work.

---------- ----------------更新

---------- Update ----------------

所以，我可以找到分配给该ID的包括：

So I can find the id assigned to the include:

View view = findViewById(R.id.placeHolder); // ok

但我找不到它的任何儿童的ID，如：

but I can't find any of its children by id like:

view.findViewById(R.id.outer); // nope
view.findViewById(R.id.inner); // nope

如果我尝试直接搜索他们像原来一样的：

same as the original if I try searching for them directly like:

findViewById(R.id.outer); // nope
findViewById(R.id.inner); // nope

做的IDS只是获得在运行时扒掉元素的可能？

Do ids just get stripped off of elements at runtime maybe?

感谢

推荐答案

尝试检索＆LT;有/＆GT; ，然后内搜索

请确保你的根具有相同的ID所包含的XML文件中的根元素..恩

Make sure your root has the same ID as the root element in the included XML file.. ex

<include
    android:id="@+id/outer"
    layout="@layout/test" />

然后使用检索您的内心的内容：

Then retrieve your "inner" content using:

FrameLayout outer = (FrameLayout)findViewById(R.id.outer);

ImageView iv = (ImageView)outer.findViewById(R.id.inner);
if (iv == null) {
    Log.e(TAG, "Not found!");
}

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