Android scrollView自动调整大小 [英] Android scrollView autosize

问题描述

我是android开发的新手.我正在尝试做一些我认为简单的事情，但是经过大量的阅读，反复试验和确定之后，我仍然找不到一种简单而优雅的解决方案，因此我正在寻求有关以下方面的帮助:

I'm new to android development. I'm attempting to do something that I thought was simple but after much reading, trial and error and determination I've failed to find a solution I find simple and elegant and therefore I'm looking for help on how to approach the following:

我有两个UI元素，一个读取"TextView"的文本视图和一个EditText框:

I have two UI elemnents, a textview that reads "TextView" and an EditText box:

<LinearLayout 
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:orientation="vertical" >

<TextView
    android:id="@+id/textView1"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:text="TextView" />

<EditText
    android:id="@+id/editText1"
    android:layout_width="match_parent"
    android:layout_height="fill_parent"
    android:ems="10"
    android:gravity="top|left"
    android:inputType="textMultiLine"
    android:scrollbarAlwaysDrawVerticalTrack="false"
    android:scrollbarStyle="insideOverlay" >
    <requestFocus />
</EditText>

</LinearLayout>

我尝试实现的行为是: 当用户将文本添加到EditText框中时，它会扩展和增长-在某些时候，它的增长足以使TextView在屏幕外滚动.我希望TextView内容始终保持可见.因此，EditText或它所在的容器可能需要剪切其内容，而不是滚动整个屏幕.

The behavior I'm attempting to implement is: As a user adds text to the EditText box it expands and grows -- at some point it grows large enough to scroll the TextView off screen. I want the TextView content to remain visible at all times. Therefore the EditText or possibly a container it lives within needs to clip it's contents instead of scrolling the entire screen.

与EditText一起，我尝试了使用以下元素的所有可能的迭代，但找不到解决方案.

Along with EditText I tried every possible iteration of using following elements and could not figure out a solution.

• Scrollview
• FrameLayout
• LinearLayout

如果有可能，我宁愿在纯xml中实现此解决方案，以便可以保持良好的关注点分离.

If it's at all possible, I'd prefer to implement this solution in pure xml so that I can maintain good separation of concerns.

推荐答案

尝试将EditText包装在ScrollView内以使其可滚动.将ScrollView layout_weight属性设置为1，将fillViewport设置为true将强制ScrollView填充可用空间，但绝不会将TextView推出屏幕.

Try to wrap EditText inside ScrollView to make it scrollable. Setting ScrollView layout_weight attribute to 1 and fillViewport to true will force ScrollView to fill available space but never push TextView out of the screen.

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:orientation="vertical" >
    <TextView
        android:id="@+id/textView1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="TextView" />
    <ScrollView
        android:layout_width="match_parent"
        android:layout_height="0dp"
        android:layout_weight="1"
        android:fillViewport="true" >
        <EditText
            android:id="@+id/editText1"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:ems="10"
            android:gravity="top|left"
            android:inputType="textMultiLine"
            android:scrollbarAlwaysDrawVerticalTrack="false"
            android:scrollbarStyle="insideOverlay" >
            <requestFocus />
        </EditText>
    </ScrollView>
</LinearLayout>

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