Android ScrollView 高度不变

Question

我有一个包含以下 XML 的布局:

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

    <ScrollView
        android:id="@+id/myScrollview"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:fillViewport="true" >

        <LinearLayout
            android:id="@+id/myEditLinearLayout"
            android:layout_width="match_parent"
            android:orientation="vertical"
            android:layout_height="wrap_content">
            <EditText
                android:id="@+id/myEdit"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:paddingLeft="8dip"
                android:paddingRight="8dip"
                android:maxLines="300"
                android:scrollHorizontally="false"
                android:hint="Type notes here..."
                android:inputType="textNoSuggestions|textMultiLine"
                android:layout_gravity="center_horizontal|center_vertical"
                android:gravity="left"
                android:textAppearance="?android:attr/textAppearanceSmall" />
            </LinearLayout>
        </LinearLayout>
    </ScrollView>
    <RelativeLayout
        android:id="@+id/layoutKbd"
        android:layout_width="match_parent"
        android:layout_height="wrap_content" >

        <android.inputmethodservice.KeyboardView
               android:id="@+id/myKeyboardView"
               android:layout_width="fill_parent"
               android:layout_height="wrap_content"
               android:layout_alignParentBottom="true"
               android:layout_centerHorizontal="true"
               android:focusable="true"
               android:focusableInTouchMode="true"
               android:keyPreviewLayout ="@layout/kbdpreview"
               android:visibility="gone" />
    </RelativeLayout>
</RelativeLayout>

顶部 View 是 RelativeLayout，主要内容有一个 ScrollView(其中包含一个 EditText)和自定义键盘 View 。当用户点击 EditText 时自定义键盘弹出。

它在大多数情况下都能完美运行，但如果在 EditText 中输入的文本很大，它会被自定义键盘 View 覆盖。所以那个时候，我需要调整ScrollView的高度。我是按以下方式做的:

// Activity's onCreate implementation
public void onCreate(Bundle savedInstanceState)
{
    ...

    EditText editText = (EditText) findViewById(R.id.myEditLinearLayout);
    editText.addTextChangedListener(m_tw);

    ...
}

private TextWatcher m_tw = new TextWatcher()
{
    @Override
    public void afterTextChanged(Editable s)
    {
    // This function returns if the custom keyboard is visible
    if (m_customKeyboard.isCustomKeyboardVisible())
    {
        int kbdHeight = m_customKeyboard.mKeyboardView.getHeight();
        int editTextBottom = m_editText.getBottom();
        ScrollView scrollView = (ScrollView) findViewById(R.id.myScrollview);

        Rect scrollBounds = new Rect();
        Log.d(TAG, "Setting scrollview height = " + (editTextBottom + kbdHeight + 20));
        scrollView.getHitRect(scrollBounds);
        Log.d(TAG, "Old scroll bounds: left = " + scrollBounds.left + " right = " + scrollBounds.right + " top = " + scrollBounds.top + " bottom = " + scrollBounds.bottom);

        scrollView.getLayoutParams().height = editTextBottom + kbdHeight + 20;

        Log.d(TAG, "Setting scrollview height = " + (editTextBottom + kbdHeight + 20));
        scrollView.getHitRect(scrollBounds);
        Log.d(TAG, "New scroll bounds: left = " + scrollBounds.left + " right = " + scrollBounds.right + " top = " + scrollBounds.top + " bottom = " + scrollBounds.bottom);
    }
    }
};

以上是行不通的。它在设置 scrollView 高度之前和之后显示相同的 scrollBounds.bottom 值。

我错过了什么？

Answer 1

放置属性

android:layout_above="@+id/yourKeyboardLayout" 

在你的 ScrollView 中。