將視圖對齊到Android中的屏幕中心

Question

我在佈局中間放置滾動視圖時遇到了問題。當我在平板電腦上看到它時，滾動視圖已放置在屏幕頂部。我需要將滾動視圖放置在屏幕中央（center_vertical | center_horizo​​ntal），圖像應位於（Center_vertical | top）。任何人都可以引導我。如何實現它爲所有類型的屏幕

layout.xml

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" 
    xmlns:tools="http://schemas.android.com/tools" 
    android:layout_width="match_parent" 
    android:layout_height="match_parent" 
    android:background="@drawable/background" 
    android:gravity="center_horizontal" 
    tools:context=".SplashActivity" > 

    <ImageView 
     android:id="@+id/imgSplash" 
     android:layout_width="match_parent" 
     android:layout_height="60dp" 
     android:layout_gravity="center_horizontal|top" 
     android:layout_marginTop="20dp" 
     android:contentDescription="@string/app_name" 
     android:scaleType="fitCenter" 
     android:src="@drawable/ic_launcher1" /> 

    <ScrollView 
     android:layout_width="match_parent" 
     android:layout_height="wrap_content" 
     android:layout_below="@id/imgSplash" 
     android:layout_gravity="center_vertical|center_horizontal" 
     android:layout_marginLeft="20dp" 
     android:layout_marginRight="20dp" 
     android:layout_marginTop="45dp" 
     android:fillViewport="true" > 

     <LinearLayout 
      android:id="@+id/mylay" 
      android:layout_width="match_parent" 
      android:layout_height="wrap_content" 
      android:orientation="vertical" > 

      <EditText 
       android:id="@+id/name" 
       android:layout_width="match_parent" 
       android:layout_height="40dp" 
       android:background="@drawable/edittext_design" 
       android:hint="Username" 
       android:paddingLeft="10dp" /> 

      <EditText 
       android:id="@+id/pass" 
       android:layout_width="match_parent" 
       android:layout_height="40dp" 
       android:layout_marginTop="10dp" 
       android:background="@drawable/edittext_design" 
       android:hint="Password" 
       android:paddingLeft="10dp" /> 

      <Button 
       android:id="@+id/but" 
       android:layout_width="match_parent" 
       android:layout_height="40dp" 
       android:layout_marginTop="10dp" 
       android:background="@drawable/bottom_shape" 
       android:text="Login" /> 
     </LinearLayout> 
    </ScrollView> 

</RelativeLayout> 

Answer 1

// try this way,hope this will help you... 

<?xml version="1.0" encoding="utf-8"?> 
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" 
    xmlns:tools="http://schemas.android.com/tools" 
    android:layout_width="match_parent" 
    android:layout_height="match_parent" 
    android:background="@drawable/background" 
    android:gravity="center" 
    tools:context=".SplashActivity" 
    android:orientation="vertical"> 

    <ImageView 
     android:id="@+id/imgSplash" 
     android:layout_width="match_parent" 
     android:layout_height="60dp" 
     android:layout_marginTop="20dp" 
     android:contentDescription="@string/app_name" 
     android:scaleType="fitCenter" 
     android:src="@drawable/ic_launcher1" /> 

    <ScrollView 
     android:layout_width="match_parent" 
     android:layout_height="0dp" 
     android:layout_weight="1" 
     android:fillViewport="true" > 

     <LinearLayout 
      android:id="@+id/mylay" 
      android:layout_width="match_parent" 
      android:layout_height="wrap_content" 
      android:orientation="vertical" 
      android:padding="20dp" 
      android:gravity="center"> 

      <EditText 
       android:id="@+id/name" 
       android:layout_width="match_parent" 
       android:layout_height="40dp" 
       android:background="@drawable/edittext_design" 
       android:hint="Username" 
       android:paddingLeft="10dp" /> 

      <EditText 
       android:id="@+id/pass" 
       android:layout_width="match_parent" 
       android:layout_height="40dp" 
       android:layout_marginTop="10dp" 
       android:background="@drawable/edittext_design" 
       android:hint="Password" 
       android:paddingLeft="10dp" /> 

      <Button 
       android:id="@+id/but" 
       android:layout_width="match_parent" 
       android:layout_height="40dp" 
       android:layout_marginTop="10dp" 
       android:background="@drawable/bottom_shape" 
       android:text="Login" /> 
     </LinearLayout> 
    </ScrollView> 

</LinearLayout> 

Answer 2

試試這個

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" 
    xmlns:tools="http://schemas.android.com/tools" 
    android:layout_width="match_parent" 
    android:layout_height="match_parent" 
    android:background="@drawable/background" 
    android:gravity="center" 
    android:layout_gravity="center" 
    tools:context=".SplashActivity" > 

    <ImageView 
     android:id="@+id/imgSplash" 
     android:layout_width="match_parent" 
     android:layout_height="60dp" 
     android:layout_gravity="center_horizontal|top" 
     android:layout_marginTop="20dp" 
     android:contentDescription="@string/app_name" 
     android:scaleType="fitCenter" 
     android:src="@drawable/ic_launcher" /> 

    <RelativeLayout 

    android:layout_width="match_parent" 
    android:layout_height="match_parent" 

    android:gravity="center" 
    android:layout_gravity="center" 
    tools:context=".SplashActivity" > 



    <ScrollView 
     android:layout_width="match_parent" 
     android:layout_height="wrap_content" 
     android:layout_below="@id/imgSplash" 
     android:layout_gravity="center_vertical|center_horizontal" 
     android:layout_marginLeft="20dp" 
     android:layout_marginRight="20dp" 
     android:layout_marginTop="45dp" 
     android:fillViewport="true" > 

     <LinearLayout 
      android:id="@+id/mylay" 
      android:layout_width="match_parent" 
      android:layout_height="wrap_content" 
      android:orientation="vertical" > 

      <EditText 
       android:id="@+id/name" 
       android:layout_width="match_parent" 
       android:layout_height="40dp" 
       android:background="@drawable/edittext_design" 
       android:hint="Username" 
       android:paddingLeft="10dp" /> 

      <EditText 
       android:id="@+id/pass" 
       android:layout_width="match_parent" 
       android:layout_height="40dp" 
       android:layout_marginTop="10dp" 
       android:background="@drawable/edittext_design" 
       android:hint="Password" 
       android:paddingLeft="10dp" /> 

      <Button 
       android:id="@+id/but" 
       android:layout_width="match_parent" 
       android:layout_height="40dp" 
       android:layout_marginTop="10dp" 
       android:background="@drawable/bottom_shape" 
       android:text="Login" /> 
     </LinearLayout> 
    </ScrollView> 

</RelativeLayout> 
</RelativeLayout> 

Answer 3

嘗試：只需添加相對佈局;

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" 
xmlns:tools="http://schemas.android.com/tools" 
android:layout_width="match_parent" 
android:layout_height="match_parent" 
android:gravity="center_horizontal" 
tools:context=".SplashActivity" > 

<ImageView 
    android:id="@+id/imgSplash" 
    android:layout_width="match_parent" 
    android:layout_height="60dp" 
    android:layout_gravity="center_horizontal|top" 
    android:layout_marginTop="20dp" 
    android:contentDescription="@string/app_name" 
    android:scaleType="fitCenter" 
    android:src="@drawable/ic_launcher1" /> 

<RelativeLayout 
    android:layout_width="wrap_content" 
    android:layout_height="wrap_content" 
    android:layout_centerHorizontal="true" 
    android:layout_centerVertical="true" > 

    <ScrollView 
     android:layout_width="match_parent" 
     android:layout_height="wrap_content" 
     android:layout_below="@id/imgSplash" 
     android:layout_gravity="center_vertical|center_horizontal" 
     android:layout_marginLeft="20dp" 
     android:layout_marginRight="20dp" 
     android:layout_marginTop="45dp" 
     android:fillViewport="true" > 

     <LinearLayout 
      android:id="@+id/mylay" 
      android:layout_width="match_parent" 
      android:layout_height="wrap_content" 
      android:orientation="vertical" > 

      <EditText 
       android:id="@+id/name" 
       android:layout_width="match_parent" 
       android:layout_height="40dp" 
       android:background="@drawable/edittext_design" 
       android:hint="Username" 
       android:paddingLeft="10dp" /> 

      <EditText 
       android:id="@+id/pass" 
       android:layout_width="match_parent" 
       android:layout_height="40dp" 
       android:layout_marginTop="10dp" 
       android:background="@drawable/edittext_design" 
       android:hint="Password" 
       android:paddingLeft="10dp" /> 

      <Button 
       android:id="@+id/but" 
       android:layout_width="match_parent" 
       android:layout_height="40dp" 
       android:layout_marginTop="10dp" 
       android:background="@drawable/bottom_shape" 
       android:text="Login" /> 
     </LinearLayout> 
    </ScrollView> 
</RelativeLayout>