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Material Shadow 9-Patch

This library provides 9-patch based drop shadow for view elements. Works on API level 14 or later.

Android Arsenal Maven Central


Example on Android 4.0 Example on Android 5.0


Target platforms

  • API level 14 or later

Latest version

  • Version 1.0.0 (September 25, 2018)

Getting started

This library is published on Maven Central. Just add these lines to build.gradle.

dependencies {
    compile 'com.h6ah4i.android.materialshadowninepatch:materialshadowninepatch:1.0.0'
}

Usage

Layout XML

<com.h6ah4i.android.materialshadowninepatch.MaterialShadowContainerView
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    style="@style/ms9_DefaultShadowStyle"
    android:id="@+id/shadow_item_container"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    app:ms9_shadowTranslationZ="2dp"
    app:ms9_shadowElevation="4dp">

    <!-- NOTE 1: only 1 child can be accepted -->
    <!-- NOTE 2: margins are required to draw shadow properly -->
    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginLeft="8dp"
        android:layout_marginTop="8dp"
        android:layout_marginRight="8dp"
        android:layout_marginBottom="8dp"
        android:background="@android:color/white"
        android:text="Inner content view" />

</com.h6ah4i.android.materialshadowninepatch.MaterialShadowContainerView>

Java code

MaterialShadowContainerView shadowView =
        (MaterialShadowContainerView) findViewById(R.id.shadow_item_container);

float density = getResources().getDisplayMetrics().density;

shadowView.setShadowTranslationZ(density * 2.0f); // 2.0 dp
shadowView.setShadowElevation(density * 4.0f); // 4.0 dp

Advanced Usages

<com.h6ah4i.android.materialshadowninepatch.MaterialShadowContainerView
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    style="@style/ms9_DefaultShadowStyle"
    android:id="@+id/shadow_item_container"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    app:ms9_shadowTranslationZ="2dp"
    app:ms9_shadowElevation="4dp"
    app:ms9_useAmbientShadow="true"
    app:ms9_useSpotShadow="true"
    app:ms9_forceUseCompatShadow="true"
    app:ms9_affectsDisplayedPosition="true"
    app:ms9_spotShadowDrawablesList="@array/ms9_spot_shadow_drawables_z18"
    app:ms9_ambientShadowDrawablesList="@array/ms9_ambient_shadow_drawables_z18">

    ...

</com.h6ah4i.android.materialshadowninepatch.MaterialShadowContainerView>
Property name Default Description
ms9_shadowTranslationZ 0dp Compatibility version of android:translationZ
ms9_shadowElevation 0dp Compatibility version of android:elevation
ms9_forceUseCompatShadow false Enforces to use compatibility shadow on Lollipop or later
ms9_affectsDisplayedPosition true Specify whether the shadow position is affected by the target view's position (emulates Lollipop's behavior)
app:ms9_useAmbientShadow true Specify whether to use ambient shadow
app:ms9_useSpotShadow true Specify whether to use spot shadow
ms9_spotShadowDrawablesList @array/ms9_spot_shadow_drawables Specify Spot shadow (Key shadow) 9-patch resources
ms9_ambientShadowDrawablesList @array/ms9_ambient_shadow_drawables Specify Ambient shadow 9-patch resources
Style name
ms9_DefaultShadowStyle([ Z6 or Z9 orZ18 ]) Default style (uses spot & ambient shadow, position affects)
ms9_DefaultShadowStyle([ Z6 or Z9 or Z18 ])CompatOnly Default style with ms9_forceUseCompatShadow="true"
ms9_NoDisplayedPositionAffectShadowStyle([ Z6 or Z9 or Z18 ]) No displayed position affects style
ms9_NoDisplayedPositionAffectShadowStyle([ Z6 or Z9 or Z18 ])CompatOnly No displayed position affects style with ms9_forceUseCompatShadow="true"
ms9_CompositeShadowStyle([ Z6 or Z9 ]) Pre-composite shadow style (less overdraws)
ms9_CompositeShadowStyle([ Z6 or Z9 ])CompatOnly Pre-composite shadow style with ms9_forceUseCompatShadow="true"

NOTE: You can specify Z[6|9|18] suffix for style names. This limits the deepest limit of shadow nine patch resources and it makes resource shrinking (shrinkResources true) work more effectively!

License

This library is licensed under the Apache Software License, Version 2.0.

See LICENSE for full of the license text.

Copyright (C) 2015 Haruki Hasegawa

Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at

    http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.

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Provides 9-patch based drop shadow for view elements. Works on API level 9 or later.

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