背景textview半屏

Question

！[我輸入圖片描述] [1]我需要設置一個textview（及其背景），填充固定大小背景的設備的一半屏幕。我嘗試這個代碼，但我不能。目標是：半屏幕，向上顯示圖像，沿着textview。

<?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:background="#000000" 
android:orientation="vertical" > 

<LinearLayout 
    xmlns:android="http://schemas.android.com/apk/res/android" 
    android:layout_width="fill_parent" 
    android:layout_height="wrap_content" 
    android:layout_weight="1" 
    android:orientation="vertical" > 

    <ImageView 
     android:layout_width="fill_parent" 
     android:layout_height="fill_parent" 
     android:background="@drawable/luna" 
     android:textSize="15pt" /> 

    <ScrollView 
     android:id="@+id/scrollView10" 
     android:layout_width="match_parent" 
     android:layout_height="wrap_content" 
     android:layout_gravity="center" 
     android:background="#000000" > 

     <TextView 
      android:id="@+id/textView10" 
      android:layout_width="match_parent" 
      android:layout_height="320dp" 
      android:background="#000000" 
      android:gravity="center" 
      android:textColor="#ffffff" 
      android:textSize="14sp" 
      android:text="jjkjkljkjkldjklsdfjkljklsdfjklsdfjklsdfjklsdfjklsdfjklsdfjklfjlsdfjkl" 
      android:autoLink="web|email" 
      android:textStyle="italic" /> 
    </ScrollView> 
</LinearLayout> 

<Button 
    android:id="@+id/button10" 
    android:layout_width="match_parent" 
    android:layout_height="wrap_content" 
    android:text="Chiudi" /> 

    </LinearLayout> 

Answer 1

您可以通過添加權重來實現此目的。

<?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:background="#000000" 
android:orientation="vertical" > 

<LinearLayout 
    xmlns:android="http://schemas.android.com/apk/res/android" 
    android:layout_width="fill_parent" 
    android:layout_height="wrap_content" 
    android:layout_weight="1" 
    android:orientation="vertical" > 

<ImageView 
    android:layout_width="fill_parent" 
    android:layout_height="fill_parent" 
    android:background="@drawable/luna" 
    android:textSize="15pt" 
    android:layout_weight="1"/> 

<ScrollView 
    android:id="@+id/scrollView10" 
    android:layout_width="match_parent" 
    android:layout_height="fill_parent" 
    android:layout_gravity="center" 
    android:background="#000000" 
    android:layout_weight="1" > 

    <TextView 
     android:id="@+id/textView10" 
     android:layout_width="match_parent" 
     android:layout_height="320dp" 
     android:background="#000000" 
     android:gravity="center" 
     android:textColor="#ffffff" 
     android:textSize="14sp" 
       android:text="jjkjkljkjkldjklsdfjkljklsdfjklsdfjklsdfjklsdfjklsdfjklsdfjklfjlsdfjkl" 
     android:autoLink="web|email" 
     android:textStyle="italic" /> 
</ScrollView> 
</LinearLayout> 

<Button 
android:id="@+id/button10" 
android:layout_width="match_parent" 
android:layout_height="wrap_content" 
android:text="Chiudi" /> 

</LinearLayout> 

Answer 2

檢查

此：

我已經改變了內線性佈局相對佈局。我認爲它會給你想要的結果：

<?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:background="#000000" 
    android:orientation="vertical" > 

    <RelativeLayout 
     xmlns:android="http://schemas.android.com/apk/res/android" 
     android:layout_width="fill_parent" 
     android:layout_height="wrap_content" 
     android:layout_weight="1" 
     android:orientation="vertical" > 

     <ScrollView 
      android:id="@+id/scrollView10" 
      android:layout_width="wrap_content" 
      android:layout_height="wrap_content" 
      android:layout_alignParentBottom="true" 
      android:layout_gravity="center" 
      android:background="#000000" > 

      <TextView 
       android:id="@+id/textView10" 
       android:layout_width="match_parent" 
       android:layout_height="320dp" 
       android:autoLink="web|email" 
       android:background="#000000" 
       android:gravity="center" 
       android:text="jjkjkljkjkldjklsdfjkljklsdfjklsdfjklsdfjklsdfjklsdfjklsdfjklfjlsdfjkl" 
       android:textColor="#ffffff" 
       android:textSize="14sp" 
       android:textStyle="italic" /> 
     </ScrollView> 

     <ImageView 
      android:id="@+id/img" 
      android:layout_width="fill_parent" 
      android:layout_height="fill_parent" 
      android:layout_above="@id/scrollView10" 
      android:background="@drawable/luna" 
      android:textSize="15pt" /> 
    </RelativeLayout> 

    <Button 
     android:id="@+id/button10" 
     android:layout_width="match_parent" 
     android:layout_height="wrap_content" 
     android:text="Chiudi" /> 

</LinearLayout> 

我先定義了scrollview。然後我用match_parent大小定義ImageView。所以它佔用了屏幕的所有剩餘空間。這樣，圖像比例也是適當的。希望能幫助到你。