当显示键盘时,viewpager片段内的Scrollview不会滚动

Question

我有一个活动,其布局内容如下:

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical">

    <android.support.v7.widget.Toolbar 
     android:id="@+id/toolbar"
     android:layout_width="match_parent"
     android:layout_height="wrap_content"
     android:background="?attr/colorPrimary"
     android:minHeight="?attr/actionBarSize"
     style="@style/ToolBarStyle.Event" />

    <com.mypackage.corecode.ui.view.SlidingTabLayout
        android:id="@+id/sliding_tabs"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:background="@color/primary_color" />

    <android.support.v4.view.ViewPager
        android:id="@+id/vendor_main_tabview_pager"
        android:layout_width="match_parent"
        android:layout_height="0dp"
        android:layout_weight="1" />

</LinearLayout>

在viewpager中,我有一个片段,它具有以下布局:

<?xml version="1.0" encoding="utf-8"?>
<ScrollView xmlns:android="http://schemas.android.com/apk/res/android"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:orientation="vertical">

        <LinearLayout
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:orientation="vertical">

                    <LinearLayout
                        android:layout_width="wrap_content"
                        android:layout_height="wrap_content"
                        android:weightSum="3"
                        android:orientation="horizontal">

                        <EditText
                            android:theme="@style/ScrollableContentThemeNoActionBar"
                            android:id="@+id/edit_text_vendor_sms_phone_number"
                            android:layout_width="0dp"
                            android:layout_weight="2"
                            android:layout_height="wrap_content"
                            android:inputType="number" />

                        <Button
                            android:id="@+id/button_send_sms"
                            android:layout_width="0dp"
                            android:layout_weight="1"
                            android:layout_height="wrap_content"
                            />
                    </LinearLayout>
         </LinearLayout>
 </ScrollView>

当片段内的内容不适合屏幕时,滚动视图允许用户查看屏幕下方的内容.(按预期工作)

问题是当edittext获得焦点时,键盘与edittext区域重叠,而不是滚动视图导致内容滚动.

我希望片段能够处理键盘和scrollview以适应屏幕上的键盘.

或者我错了,是否对键盘负责？由于活动布局中的根视图是linearlayout,它是否限制了扩展？

我尝试用滚动视图包装活动布局的整个内容,但是如果我没有给它一个固定的大小,这次viewpager不会出现在屏幕上.即使我这样做,我最终在片段内部有一个滚动视图,它位于主布局的滚动视图下方,而键盘仍然在编辑文本上方盘旋.

我在这里有点迷失,我的目标是能够在编辑文本聚焦时滚动片段内容,而是键盘当前与edittext重叠.

Answer 1

我可能会搞错,但可能是因为已知的Android错误,您只需要在项目中添加下一个类:

public class AndroidBug5497Workaround {

    // For more information, see https://code.google.com/p/android/issues/detail?id=5497
    // To use this class, simply invoke assistActivity() on an Activity that already has its content view set.

    public static void assistActivity (Activity activity) {
        new AndroidBug5497Workaround(activity);
    }

    private View mChildOfContent;
    private int usableHeightPrevious;
    private FrameLayout.LayoutParams frameLayoutParams;

    private AndroidBug5497Workaround(Activity activity) {
        FrameLayout content = (FrameLayout) activity.findViewById(android.R.id.content);
        mChildOfContent = content.getChildAt(0);
        mChildOfContent.getViewTreeObserver().addOnGlobalLayoutListener(new ViewTreeObserver.OnGlobalLayoutListener() {
            public void onGlobalLayout() {
                possiblyResizeChildOfContent();
            }
        });
        frameLayoutParams = (FrameLayout.LayoutParams) mChildOfContent.getLayoutParams();
    }

    private void possiblyResizeChildOfContent() {
        int usableHeightNow = computeUsableHeight();
        if (usableHeightNow != usableHeightPrevious) {
            int usableHeightSansKeyboard = mChildOfContent.getRootView().getHeight();
            int heightDifference = usableHeightSansKeyboard - usableHeightNow;
            if (heightDifference > (usableHeightSansKeyboard/4)) {
                // keyboard probably just became visible
                frameLayoutParams.height = usableHeightSansKeyboard - heightDifference;
            } else {
                // keyboard probably just became hidden
                frameLayoutParams.height = usableHeightSansKeyboard;
            }
            mChildOfContent.requestLayout();
            usableHeightPrevious = usableHeightNow;
        }
    }

    private int computeUsableHeight() {
        Rect r = new Rect();
        mChildOfContent.getWindowVisibleDisplayFrame(r);
        return (r.bottom - r.top);
    }

}

然后简单地通过调用使用它assistActivity()在你的活动方法保存ViewPager和SlidingTabLayout:

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(...);
    AndroidBug5497Workaround.assistActivity(this);
    ...
}

有关更多背景,请查看此主题.