Android LinearLayout : Add border with shadow around a LinearLayout

Android LinearLayout : Add border with shadow around a LinearLayout

To add a border with shadow around a LinearLayout in Android, you can achieve this by using a combination of CardView and adjusting its elevation for shadow effects. Here's how you can do it:

Using CardView for Border and Shadow

  1. Add CardView Dependency: Ensure you have the CardView dependency in your build.gradle file:

    implementation 'androidx.cardview:cardview:1.0.0'

  2. XML Layout: Replace your existing LinearLayout with a CardView in your XML layout file. Set the cardElevation for the shadow and cardBackgroundColor for the border color:

    <androidx.cardview.widget.CardView android:layout_width="match_parent" android:layout_height="wrap_content" app:cardBackgroundColor="#FFFFFF" <!-- Border color --> app:cardCornerRadius="8dp" <!-- Border corner radius --> app:cardElevation="4dp" <!-- Shadow elevation --> app:cardUseCompatPadding="true" <!-- Padding for shadow --> app:contentPadding="8dp" <!-- Content padding inside the CardView --> > <LinearLayout android:layout_width="match_parent" android:layout_height="wrap_content" android:orientation="vertical" android:padding="16dp" <!-- Padding inside the LinearLayout --> > <!-- Add your LinearLayout content here --> </LinearLayout> </androidx.cardview.widget.CardView>

  3. Explanation:

    • CardView Attributes:
      • cardElevation: Sets the elevation (z-depth) of the CardView to create a shadow effect.
      • cardBackgroundColor: Defines the background color of the CardView, which acts as the border color.
      • cardCornerRadius: Specifies the corner radius of the CardView, giving it rounded corners.
      • cardUseCompatPadding: Ensures compatibility padding for shadow on pre-Lollipop devices.
      • contentPadding: Adds padding inside the CardView, adjusting the space between the border and its content.
    • LinearLayout: Contains your original LinearLayout content. Adjust its properties (like orientation and padding) as needed.

  4. Additional Considerations:

    • Ensure that your project has migrated to AndroidX if you're using the androidx.cardview.widget.CardView class.
    • Adjust cardElevation and cardCornerRadius values to achieve the desired shadow and border radius effect.
    • Customize cardBackgroundColor to change the border color as per your design requirements.

By using CardView with appropriate attributes, you can easily add a border with shadow effects around a LinearLayout in your Android application layout. This method provides flexibility in design and ensures compatibility across different Android versions.

Examples

  1. Android LinearLayout with border and shadow

    • Description: Create a LinearLayout with both a border and shadow effect in Android.
    • Code Implementation: Use a combination of background drawable for border and elevation for shadow.
    <LinearLayout android:layout_width="match_parent" android:layout_height="wrap_content" android:background="@drawable/linearlayout_background" android:elevation="4dp" android:padding="16dp"> <!-- Add child views here --> </LinearLayout> 
    <!-- res/drawable/linearlayout_background.xml --> <shape xmlns:android="http://schemas.android.com/apk/res/android" android:shape="rectangle"> <solid android:color="@android:color/white" /> <stroke android:width="1dp" android:color="@android:color/black" /> <corners android:radius="8dp" /> </shape>

  2. Android LinearLayout with rounded corners, border, and shadow

    • Description: Customize a LinearLayout to have rounded corners, a border, and a shadow effect in Android.
    • Code Implementation: Use a combination of shape drawable for rounded corners, background drawable for border, and elevation for shadow.
    <LinearLayout android:layout_width="match_parent" android:layout_height="wrap_content" android:background="@drawable/rounded_linearlayout_background" android:elevation="8dp" android:padding="16dp"> <!-- Add child views here --> </LinearLayout> 
    <!-- res/drawable/rounded_linearlayout_background.xml --> <shape xmlns:android="http://schemas.android.com/apk/res/android" android:shape="rectangle"> <solid android:color="@android:color/white" /> <stroke android:width="1dp" android:color="@android:color/black" /> <corners android:radius="12dp" /> </shape>

  3. Android LinearLayout with border and inner shadow

    • Description: Implement a LinearLayout with a border and an inner shadow effect in Android.
    • Code Implementation: Use a layer list drawable for inner shadow effect and stroke for border.
    <LinearLayout android:layout_width="match_parent" android:layout_height="wrap_content" android:background="@drawable/linearlayout_inner_shadow" android:padding="16dp"> <!-- Add child views here --> </LinearLayout> 
    <!-- res/drawable/linearlayout_inner_shadow.xml --> <layer-list xmlns:android="http://schemas.android.com/apk/res/android"> <item android:right="1dp" android:top="1dp" android:left="1dp" android:bottom="1dp"> <shape android:shape="rectangle"> <solid android:color="@android:color/white" /> <corners android:radius="8dp" /> <stroke android:width="1dp" android:color="@android:color/black" /> </shape> </item> <item android:right="1dp" android:top="1dp" android:left="1dp" android:bottom="1dp"> <shape android:shape="rectangle"> <solid android:color="@android:color/transparent" /> <corners android:radius="8dp" /> <stroke android:width="1dp" android:color="@android:color/gray" /> <padding android:bottom="5dp" android:left="5dp" android:right="5dp" android:top="5dp" /> <corners android:radius="8dp" /> </shape> </item> </layer-list>

  4. Android LinearLayout with border and rounded corners

    • Description: Display a LinearLayout with a border and rounded corners in Android.
    • Code Implementation: Use a shape drawable for rounded corners and stroke for border.
    <LinearLayout android:layout_width="match_parent" android:layout_height="wrap_content" android:background="@drawable/rounded_border_linearlayout" android:padding="16dp"> <!-- Add child views here --> </LinearLayout> 
    <!-- res/drawable/rounded_border_linearlayout.xml --> <shape xmlns:android="http://schemas.android.com/apk/res/android" android:shape="rectangle"> <solid android:color="@android:color/white" /> <stroke android:width="1dp" android:color="@android:color/black" /> <corners android:radius="12dp" /> </shape>

  5. Android LinearLayout with gradient border and shadow

    • Description: Create a LinearLayout with a gradient border and shadow effect in Android.
    • Code Implementation: Use a combination of shape drawable for gradient border and elevation for shadow.
    <LinearLayout android:layout_width="match_parent" android:layout_height="wrap_content" android:background="@drawable/gradient_border_linearlayout" android:elevation="8dp" android:padding="16dp"> <!-- Add child views here --> </LinearLayout> 
    <!-- res/drawable/gradient_border_linearlayout.xml --> <shape xmlns:android="http://schemas.android.com/apk/res/android" android:shape="rectangle"> <gradient android:startColor="#FF4081" android:endColor="#3F51B5" android:angle="45" /> <stroke android:width="2dp" android:color="@android:color/black" /> <corners android:radius="8dp" /> </shape>

  6. Android LinearLayout with dashed border and shadow

    • Description: Implement a LinearLayout with a dashed border and shadow effect in Android.
    • Code Implementation: Use a combination of shape drawable with dash effect for border and elevation for shadow.
    <LinearLayout android:layout_width="match_parent" android:layout_height="wrap_content" android:background="@drawable/dashed_border_linearlayout" android:elevation="4dp" android:padding="16dp"> <!-- Add child views here --> </LinearLayout> 
    <!-- res/drawable/dashed_border_linearlayout.xml --> <shape xmlns:android="http://schemas.android.com/apk/res/android" android:shape="rectangle"> <solid android:color="@android:color/white" /> <stroke android:width="2dp" android:color="@android:color/black" android:dashWidth="5dp" android:dashGap="5dp" /> <corners android:radius="8dp" /> </shape>

  7. Android LinearLayout with border and gradient shadow

    • Description: Customize a LinearLayout to have a border with a gradient shadow effect in Android.
    • Code Implementation: Use a shape drawable for border and a layer list drawable for gradient shadow.
    <LinearLayout android:layout_width="match_parent" android:layout_height="wrap_content" android:background="@drawable/linearlayout_border_gradient_shadow" android:padding="16dp"> <!-- Add child views here --> </LinearLayout> 
    <!-- res/drawable/linearlayout_border_gradient_shadow.xml --> <layer-list xmlns:android="http://schemas.android.com/apk/res/android"> <item> <shape android:shape="rectangle"> <solid android:color="@android:color/white" /> <stroke android:width="1dp" android:color="@android:color/black" /> <corners android:radius="8dp" /> </shape> </item> <item android:right="1dp" android:top="1dp" android:left="1dp" android:bottom="1dp"> <shape android:shape="rectangle"> <gradient android:startColor="#DD000000" android:endColor="#33000000" android:angle="45" /> <corners android:radius="8dp" /> </shape> </item> </layer-list>

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