android滚动视图隐藏顶部内容

Question

我在使用 ScrollView 时遇到问题。出于某种奇怪的原因，它隐藏了要显示在顶部的内容。我尝试提供边距、填充等，但似乎没有任何效果。这是我的布局：

    <?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent" android:layout_height="fill_parent"
    android:orientation="vertical" android:background="@drawable/background">
    <LinearLayout android:layout_width="fill_parent"
        android:layout_height="wrap_content" android:background="@drawable/titlebar"
        android:id="@+id/titlebar">
        <TextView android:layout_width="fill_parent" android:id="@+id/textView1"
            android:layout_height="fill_parent" android:layout_gravity="center"
            android:gravity="center" android:textColor="@color/white"
            android:textSize="20dip" android:text="Help"></TextView>
    </LinearLayout>
    <ScrollView android:layout_height="wrap_content" android:id="@+id/scrollView1"
        android:layout_width="fill_parent">
        <LinearLayout android:orientation="vertical" android:id="@+id/linearLayout2"
            android:gravity="center" android:layout_width="fill_parent"
            android:layout_gravity="center" android:layout_height="fill_parent"
            android:paddingLeft="10dip" android:paddingRight="5dip">
            <ImageView android:layout_height="wrap_content"
                android:src="@drawable/icon" android:layout_marginTop="10dip"
                android:id="@+id/help_icon" android:layout_width="fill_parent"
                android:layout_marginBottom="15dip"></ImageView>
            <TextView android:layout_height="wrap_content"
                android:text="Lorem ipsum dolor sit amet, consectetur adipiscing elit. Sed dapibus venenatis suscipit.\n\nCras lacus sem, cursus a dictum sed, condimentum quis urna. Ut vel metus lorem, quis semper lacus. Suspendisse eu urna massa, a blandit mi. "
                android:id="@+id/help_text" android:layout_width="wrap_content"
                android:textColor="@color/black" android:textSize="15dip"
                android:paddingBottom="10dip"></TextView>
        </LinearLayout>
    </ScrollView>
</LinearLayout>

我的图像隐藏在顶部标题栏后面，在设备/模拟器中只有一小部分底部可见。它在 Eclipse 中看起来不错。我正在使用 ADT11

提前致谢！

Answer 1

您好，我遇到了同样的问题，经过调查，我找到了解决方案，在您的 XML 代码中，我可以看到您在布局中犯了同样的错误。

问题是您将 ScrollView 子 (LinearLayout) layout_gravity 设置为居中。删除这一行，它应该对你有用。

android:layout_gravity="center"   //remove this 

Answer 2

我想你想要这样的东西：

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent" android:layout_height="fill_parent"
    android:orientation="vertical">
    <LinearLayout android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:orientation="vertical"
        android:id="@+id/titlebar">
        <TextView android:layout_width="fill_parent" android:id="@+id/textView1"
            android:layout_height="wrap_content" android:layout_gravity="center"
            android:gravity="center" android:textColor="@android:color/white"
            android:textSize="20dip" android:text="Help"></TextView>

                 <ImageView android:layout_height="wrap_content"
                android:src="@drawable/icon" android:layout_marginTop="10dip"
                android:id="@+id/help_icon" android:layout_width="fill_parent"
                android:layout_marginBottom="15dip"></ImageView>
    </LinearLayout>
    <ScrollView android:layout_height="match_parent" android:id="@+id/scrollView1"
        android:layout_width="fill_parent">
        <LinearLayout android:orientation="vertical" android:id="@+id/linearLayout2"
            android:gravity="center" android:layout_width="fill_parent"
             android:layout_height="fill_parent"
            android:paddingLeft="10dip" android:paddingRight="5dip">

            <TextView android:layout_height="wrap_content"
                android:text="Lorem ipsum dolor sit amet, consectetur adipiscing elit. Sed dapibus venenatis suscipit.\n\nCras lacus sem, cursus a dictum sed, condimentum quis urna. Ut vel metus lorem, quis semper lacus. Suspendisse eu urna massa, a blandit mi. Lorem ipsum dolor sit amet, consectetur adipiscing elit. Sed dapibus venenatis suscipit.\n\nCras lacus sem, cursus a dictum sed, condimentum quis urna. Ut vel metus lorem, quis semper lacus. Suspendisse eu urna massa, a blandit mi.Lorem ipsum dolor sit amet, consectetur adipiscing elit. Sed dapibus venenatis suscipit.\n\nCras lacus sem, cursus a dictum sed, condimentum quis urna. Ut vel metus lorem, quis semper lacus. Suspendisse eu urna massa, a blandit mi.Lorem ipsum dolor sit amet, consectetur adipiscing elit. Sed dapibus venenatis suscipit.\n\nCras lacus sem, cursus a dictum sed, condimentum quis urna. Ut vel metus lorem, quis semper lacus. Suspendisse eu urna massa, a blandit mi.Lorem ipsum dolor sit amet, consectetur adipiscing elit. Sed dapibus venenatis suscipit.\n\nCras lacus sem, cursus a dictum sed, condimentum quis urna. Ut vel metus lorem, quis semper lacus. Suspendisse eu urna massa, a blandit mi.Lorem ipsum dolor sit amet, consectetur adipiscing elit. Sed dapibus venenatis suscipit.\n\nCras lacus sem, cursus a dictum sed, condimentum quis urna. Ut vel metus lorem, quis semper lacus. Suspendisse eu urna massa, a blandit mi."
                android:id="@+id/help_text" android:layout_width="wrap_content"
                android:textColor="@android:color/white" android:textSize="15sp"
                android:paddingBottom="10dip"></TextView>
        </LinearLayout>
    </ScrollView>
</LinearLayout>

Answer 3

将 android:layout_weight="1" 添加到您的滚动视图中。它将解决问题。像这样的

 <ScrollView
        android:id="@+id/scroll"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content" android:layout_weight="1" >