compile 'com.github.devlight.shadowlayout:library:1.0.2'

 <com.gigamole.library.ShadowLayout

        android:layout_width="wrap_content"

        android:layout_height="wrap_content"

        app:sl_shadow_angle="2"

        app:sl_shadow_color="#000"

        android:id="@+id/sl"

        app:sl_shadow_distance="5dp"

        app:sl_shadow_radius="1dp"

        app:sl_shadowed="true">

        <ImageView

            android:layout_width="100dp"

            android:id="@+id/ls"

            android:layout_height="100dp"

            android:src="@mipmap/menu_stick" />

    </com.gigamole.library.ShadowLayout>

        final ShadowLayout shadowLayout = (ShadowLayout) findViewById(R.id.sl);

        shadowLayout.setIsShadowed(true);

        shadowLayout.setShadowAngle(45);//阴影角度

        shadowLayout.setShadowRadius(20);//阴影半径

        shadowLayout.setShadowDistance(30);//阴影距离

        shadowLayout.setShadowColor(Color.DKGRAY);//阴影颜色