diff --git a/app/src/main/res/drawable/ic_launcher_background.xml b/app/src/main/res/drawable/ic_launcher_background.xml
new file mode 100644
index 00000000..49c86ecb
--- /dev/null
+++ b/app/src/main/res/drawable/ic_launcher_background.xml
@@ -0,0 +1,24 @@
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+        android:width="108dp"
+        android:height="108dp"
+        android:viewportWidth="512"
+        android:viewportHeight="512">
+  <path
+      android:pathData="M0,0h512v256h-512z"
+      android:strokeAlpha="0.94117647"
+      android:strokeWidth="0.40000001"
+      android:fillColor="#d7d7d7"
+      android:strokeColor="#00000000"
+      android:fillType="nonZero"
+      android:fillAlpha="1"
+      android:strokeLineCap="butt"/>
+  <path
+      android:pathData="M0,256h512v256h-512z"
+      android:strokeAlpha="0.94117647"
+      android:strokeWidth="0.40000001"
+      android:fillColor="#eeeeee"
+      android:strokeColor="#00000000"
+      android:fillType="nonZero"
+      android:fillAlpha="1"
+      android:strokeLineCap="butt"/>
+</vector>
diff --git a/app/src/main/res/mipmap-anydpi-v26/ic_launcher_round.xml b/app/src/main/res/mipmap-anydpi-v26/ic_launcher_round.xml
deleted file mode 100644
index c4a603d4..00000000
--- a/app/src/main/res/mipmap-anydpi-v26/ic_launcher_round.xml
+++ /dev/null
@@ -1,5 +0,0 @@
-<?xml version="1.0" encoding="utf-8"?>
-<adaptive-icon xmlns:android="http://schemas.android.com/apk/res/android">
-    <background android:drawable="@drawable/ic_launcher_background"/>
-    <foreground android:drawable="@mipmap/ic_launcher_foreground"/>
-</adaptive-icon>
\ No newline at end of file
diff --git a/app/src/main/res/mipmap-hdpi-v26/ic_launcher_foreground.png b/app/src/main/res/mipmap-hdpi-v26/ic_launcher_foreground.png
new file mode 100644
index 00000000..89979b2e
Binary files /dev/null and b/app/src/main/res/mipmap-hdpi-v26/ic_launcher_foreground.png differ
diff --git a/app/src/main/res/mipmap-hdpi/ic_launcher.png b/app/src/main/res/mipmap-hdpi/ic_launcher.png
index 869b9cbc..61bb0e66 100644
Binary files a/app/src/main/res/mipmap-hdpi/ic_launcher.png and b/app/src/main/res/mipmap-hdpi/ic_launcher.png differ
diff --git a/app/src/main/res/mipmap-hdpi/ic_launcher_foreground.png b/app/src/main/res/mipmap-hdpi/ic_launcher_foreground.png
deleted file mode 100644
index b7b1ba74..00000000
Binary files a/app/src/main/res/mipmap-hdpi/ic_launcher_foreground.png and /dev/null differ
diff --git a/app/src/main/res/mipmap-hdpi/ic_launcher_round.png b/app/src/main/res/mipmap-hdpi/ic_launcher_round.png
deleted file mode 100644
index e5ccbc97..00000000
Binary files a/app/src/main/res/mipmap-hdpi/ic_launcher_round.png and /dev/null differ
diff --git a/app/src/main/res/mipmap-xhdpi-v26/ic_launcher_foreground.png b/app/src/main/res/mipmap-xhdpi-v26/ic_launcher_foreground.png
new file mode 100644
index 00000000..c61b1584
Binary files /dev/null and b/app/src/main/res/mipmap-xhdpi-v26/ic_launcher_foreground.png differ
diff --git a/app/src/main/res/mipmap-xhdpi/ic_launcher.png b/app/src/main/res/mipmap-xhdpi/ic_launcher.png
index 8b6c884d..80952f3d 100644
Binary files a/app/src/main/res/mipmap-xhdpi/ic_launcher.png and b/app/src/main/res/mipmap-xhdpi/ic_launcher.png differ
diff --git a/app/src/main/res/mipmap-xhdpi/ic_launcher_foreground.png b/app/src/main/res/mipmap-xhdpi/ic_launcher_foreground.png
deleted file mode 100644
index bd4a74e4..00000000
Binary files a/app/src/main/res/mipmap-xhdpi/ic_launcher_foreground.png and /dev/null differ
diff --git a/app/src/main/res/mipmap-xhdpi/ic_launcher_round.png b/app/src/main/res/mipmap-xhdpi/ic_launcher_round.png
deleted file mode 100644
index 95013374..00000000
Binary files a/app/src/main/res/mipmap-xhdpi/ic_launcher_round.png and /dev/null differ
diff --git a/app/src/main/res/mipmap-xxhdpi-v26/ic_launcher_foreground.png b/app/src/main/res/mipmap-xxhdpi-v26/ic_launcher_foreground.png
new file mode 100644
index 00000000..f5213a49
Binary files /dev/null and b/app/src/main/res/mipmap-xxhdpi-v26/ic_launcher_foreground.png differ
diff --git a/app/src/main/res/mipmap-xxhdpi/ic_launcher.png b/app/src/main/res/mipmap-xxhdpi/ic_launcher.png
index af43070f..d0b015ba 100644
Binary files a/app/src/main/res/mipmap-xxhdpi/ic_launcher.png and b/app/src/main/res/mipmap-xxhdpi/ic_launcher.png differ
diff --git a/app/src/main/res/mipmap-xxhdpi/ic_launcher_foreground.png b/app/src/main/res/mipmap-xxhdpi/ic_launcher_foreground.png
deleted file mode 100644
index dcc2caa4..00000000
Binary files a/app/src/main/res/mipmap-xxhdpi/ic_launcher_foreground.png and /dev/null differ
diff --git a/app/src/main/res/mipmap-xxhdpi/ic_launcher_round.png b/app/src/main/res/mipmap-xxhdpi/ic_launcher_round.png
deleted file mode 100644
index 837bc659..00000000
Binary files a/app/src/main/res/mipmap-xxhdpi/ic_launcher_round.png and /dev/null differ
diff --git a/app/src/main/res/mipmap-xxxhdpi-v26/ic_launcher_foreground.png b/app/src/main/res/mipmap-xxxhdpi-v26/ic_launcher_foreground.png
new file mode 100644
index 00000000..37333547
Binary files /dev/null and b/app/src/main/res/mipmap-xxxhdpi-v26/ic_launcher_foreground.png differ
diff --git a/app/src/main/res/mipmap-xxxhdpi/ic_launcher.png b/app/src/main/res/mipmap-xxxhdpi/ic_launcher.png
index fac98df4..df7e0fc6 100644
Binary files a/app/src/main/res/mipmap-xxxhdpi/ic_launcher.png and b/app/src/main/res/mipmap-xxxhdpi/ic_launcher.png differ
diff --git a/app/src/main/res/mipmap-xxxhdpi/ic_launcher_foreground.png b/app/src/main/res/mipmap-xxxhdpi/ic_launcher_foreground.png
deleted file mode 100644
index 0a73d18c..00000000
Binary files a/app/src/main/res/mipmap-xxxhdpi/ic_launcher_foreground.png and /dev/null differ
diff --git a/app/src/main/res/mipmap-xxxhdpi/ic_launcher_round.png b/app/src/main/res/mipmap-xxxhdpi/ic_launcher_round.png
deleted file mode 100644
index ab9c9042..00000000
Binary files a/app/src/main/res/mipmap-xxxhdpi/ic_launcher_round.png and /dev/null differ
diff --git a/art/markwon-icon-foreground.svg b/art/markwon-icon-foreground.svg
new file mode 100644
index 00000000..64cf269b
--- /dev/null
+++ b/art/markwon-icon-foreground.svg
@@ -0,0 +1,97 @@
+<?xml version="1.0" encoding="UTF-8" standalone="no"?>
+<!-- Created with Inkscape (http://www.inkscape.org/) -->
+
+<svg
+   xmlns:dc="http://purl.org/dc/elements/1.1/"
+   xmlns:cc="http://creativecommons.org/ns#"
+   xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"
+   xmlns:svg="http://www.w3.org/2000/svg"
+   xmlns="http://www.w3.org/2000/svg"
+   xmlns:sodipodi="http://sodipodi.sourceforge.net/DTD/sodipodi-0.dtd"
+   xmlns:inkscape="http://www.inkscape.org/namespaces/inkscape"
+   width="512"
+   height="512"
+   viewBox="0 0 512.00001 512.00001"
+   id="svg2"
+   version="1.1"
+   inkscape:version="0.91 r13725"
+   inkscape:export-filename="/Users/di/text4169.png"
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+     id="defs4" />
+  <sodipodi:namedview
+     id="base"
+     pagecolor="#ffffff"
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+     borderopacity="1.0"
+     inkscape:pageopacity="0.0"
+     inkscape:pageshadow="2"
+     inkscape:zoom="0.92578125"
+     inkscape:cx="163.7657"
+     inkscape:cy="186.451"
+     inkscape:document-units="px"
+     inkscape:current-layer="layer1"
+     showgrid="false"
+     units="px"
+     inkscape:window-width="1442"
+     inkscape:window-height="788"
+     inkscape:window-x="-1"
+     inkscape:window-y="0"
+     inkscape:window-maximized="0" />
+  <metadata
+     id="metadata7">
+    <rdf:RDF>
+      <cc:Work
+         rdf:about="">
+        <dc:format>image/svg+xml</dc:format>
+        <dc:type
+           rdf:resource="http://purl.org/dc/dcmitype/StillImage" />
+        <dc:title></dc:title>
+      </cc:Work>
+    </rdf:RDF>
+  </metadata>
+  <g
+     inkscape:label="Layer 1"
+     inkscape:groupmode="layer"
+     id="layer1"
+     transform="translate(0,-540.36216)">
+    <text
+       xml:space="preserve"
+       style="font-style:normal;font-weight:normal;font-size:34.96873856px;line-height:125%;font-family:sans-serif;letter-spacing:0px;word-spacing:0px;fill:#000000;fill-opacity:1;stroke:none;stroke-width:1px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1"
+       x="106.24741"
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+       id="text4136"
+       sodipodi:linespacing="125%"><tspan
+         sodipodi:role="line"
+         id="tspan4138"
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+    <text
+       xml:space="preserve"
+       style="font-style:normal;font-weight:normal;font-size:65.1031189px;line-height:125%;font-family:sans-serif;letter-spacing:0px;word-spacing:0px;fill:#666666;fill-opacity:1;stroke:none;stroke-width:1px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1;"
+       x="109.9856"
+       y="780.45221"
+       id="text4140"
+       sodipodi:linespacing="125%"><tspan
+         sodipodi:role="line"
+         id="tspan4142"
+         x="109.9856"
+         y="780.45221"
+         style="font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;font-size:293.75px;font-family:'Noto Serif';-inkscape-font-specification:'Noto Serif';fill:#666666;">**</tspan></text>
+    <text
+       xml:space="preserve"
+       style="font-style:normal;font-weight:normal;font-size:40.77807617px;line-height:125%;font-family:sans-serif;letter-spacing:0px;word-spacing:0px;fill:#666666;fill-opacity:1;stroke:none;stroke-width:1px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1;"
+       x="109.9856"
+       y="1150.7955"
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+       sodipodi:linespacing="125%"><tspan
+         sodipodi:role="line"
+         id="tspan4171"
+         x="109.9856"
+         y="1150.7955"
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+  </g>
+</svg>
diff --git a/art/sample-icon-foreground.svg b/art/sample-icon-foreground.svg
new file mode 100644
index 00000000..ae284cf4
--- /dev/null
+++ b/art/sample-icon-foreground.svg
@@ -0,0 +1,97 @@
+<?xml version="1.0" encoding="UTF-8" standalone="no"?>
+<!-- Created with Inkscape (http://www.inkscape.org/) -->
+
+<svg
+   xmlns:dc="http://purl.org/dc/elements/1.1/"
+   xmlns:cc="http://creativecommons.org/ns#"
+   xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"
+   xmlns:svg="http://www.w3.org/2000/svg"
+   xmlns="http://www.w3.org/2000/svg"
+   xmlns:sodipodi="http://sodipodi.sourceforge.net/DTD/sodipodi-0.dtd"
+   xmlns:inkscape="http://www.inkscape.org/namespaces/inkscape"
+   width="512"
+   height="512"
+   viewBox="0 0 512.00001 512.00001"
+   id="svg2"
+   version="1.1"
+   inkscape:version="0.91 r13725"
+   inkscape:export-filename="/Users/di/text4169.png"
+   inkscape:export-xdpi="89.93"
+   inkscape:export-ydpi="89.93"
+   sodipodi:docname="sample-icon-foreground.svg">
+  <defs
+     id="defs4" />
+  <sodipodi:namedview
+     id="base"
+     pagecolor="#ffffff"
+     bordercolor="#666666"
+     borderopacity="1.0"
+     inkscape:pageopacity="0.0"
+     inkscape:pageshadow="2"
+     inkscape:zoom="0.92578125"
+     inkscape:cx="163.7657"
+     inkscape:cy="186.451"
+     inkscape:document-units="px"
+     inkscape:current-layer="layer1"
+     showgrid="false"
+     units="px"
+     inkscape:window-width="1442"
+     inkscape:window-height="788"
+     inkscape:window-x="-1"
+     inkscape:window-y="0"
+     inkscape:window-maximized="0" />
+  <metadata
+     id="metadata7">
+    <rdf:RDF>
+      <cc:Work
+         rdf:about="">
+        <dc:format>image/svg+xml</dc:format>
+        <dc:type
+           rdf:resource="http://purl.org/dc/dcmitype/StillImage" />
+        <dc:title></dc:title>
+      </cc:Work>
+    </rdf:RDF>
+  </metadata>
+  <g
+     inkscape:label="Layer 1"
+     inkscape:groupmode="layer"
+     id="layer1"
+     transform="translate(0,-540.36216)">
+    <text
+       xml:space="preserve"
+       style="font-style:normal;font-weight:normal;font-size:34.96873856px;line-height:125%;font-family:sans-serif;letter-spacing:0px;word-spacing:0px;fill:#ffffff;fill-opacity:1;stroke:none;stroke-width:1px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1;"
+       x="106.24741"
+       y="908.6958"
+       id="text4136"
+       sodipodi:linespacing="125%"><tspan
+         sodipodi:role="line"
+         id="tspan4138"
+         x="106.24741"
+         y="908.6958"
+         style="font-style:normal;font-variant:normal;font-weight:bold;font-stretch:normal;font-size:314.71862793px;font-family:'Noto Serif';-inkscape-font-specification:'Noto Serif Bold';fill:#ffffff;">M</tspan></text>
+    <text
+       xml:space="preserve"
+       style="font-style:normal;font-weight:normal;font-size:65.1031189px;line-height:125%;font-family:sans-serif;letter-spacing:0px;word-spacing:0px;fill:#999999;fill-opacity:1;stroke:none;stroke-width:1px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1;"
+       x="109.9856"
+       y="780.45221"
+       id="text4140"
+       sodipodi:linespacing="125%"><tspan
+         sodipodi:role="line"
+         id="tspan4142"
+         x="109.9856"
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+    <text
+       xml:space="preserve"
+       style="font-style:normal;font-weight:normal;font-size:40.77807617px;line-height:125%;font-family:sans-serif;letter-spacing:0px;word-spacing:0px;fill:#999999;fill-opacity:1;stroke:none;stroke-width:1px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1;"
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+       y="1150.7955"
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+       sodipodi:linespacing="125%"><tspan
+         sodipodi:role="line"
+         id="tspan4171"
+         x="109.9856"
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+  </g>
+</svg>
diff --git a/sample/src/main/AndroidManifest.xml b/sample/src/main/AndroidManifest.xml
index 732928be..d3c2b0e1 100644
--- a/sample/src/main/AndroidManifest.xml
+++ b/sample/src/main/AndroidManifest.xml
@@ -8,8 +8,8 @@
     <application
         android:allowBackup="true"
         android:icon="@mipmap/ic_launcher"
+        android:roundIcon="@mipmap/ic_launcher"
         android:label="@string/app_name"
-        android:roundIcon="@mipmap/ic_launcher_round"
         android:theme="@style/AppTheme"
         tools:ignore="AllowBackup,GoogleAppIndexingWarning">
 
diff --git a/sample/src/main/res/drawable/ic_launcher_background.xml b/sample/src/main/res/drawable/ic_launcher_background.xml
new file mode 100644
index 00000000..02e8ba59
--- /dev/null
+++ b/sample/src/main/res/drawable/ic_launcher_background.xml
@@ -0,0 +1,24 @@
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+        android:width="108dp"
+        android:height="108dp"
+        android:viewportWidth="512"
+        android:viewportHeight="512">
+  <path
+      android:pathData="M0,256h512v256h-512z"
+      android:strokeAlpha="0.8574118"
+      android:strokeWidth="0.40000001"
+      android:fillColor="#1a1a1a"
+      android:strokeColor="#00000000"
+      android:fillType="nonZero"
+      android:fillAlpha="0.911"
+      android:strokeLineCap="butt"/>
+  <path
+      android:pathData="M0,2h512v256h-512z"
+      android:strokeAlpha="0.94117647"
+      android:strokeWidth="0.40000001"
+      android:fillColor="#1a1a1a"
+      android:strokeColor="#00000000"
+      android:fillType="nonZero"
+      android:fillAlpha="1"
+      android:strokeLineCap="butt"/>
+</vector>
diff --git a/sample/src/main/res/mipmap-anydpi-v26/ic_launcher_round.xml b/sample/src/main/res/mipmap-anydpi-v26/ic_launcher_round.xml
deleted file mode 100644
index c4a603d4..00000000
--- a/sample/src/main/res/mipmap-anydpi-v26/ic_launcher_round.xml
+++ /dev/null
@@ -1,5 +0,0 @@
-<?xml version="1.0" encoding="utf-8"?>
-<adaptive-icon xmlns:android="http://schemas.android.com/apk/res/android">
-    <background android:drawable="@drawable/ic_launcher_background"/>
-    <foreground android:drawable="@mipmap/ic_launcher_foreground"/>
-</adaptive-icon>
\ No newline at end of file
diff --git a/sample/src/main/res/mipmap-hdpi-v26/ic_launcher_foreground.png b/sample/src/main/res/mipmap-hdpi-v26/ic_launcher_foreground.png
new file mode 100644
index 00000000..01bae147
Binary files /dev/null and b/sample/src/main/res/mipmap-hdpi-v26/ic_launcher_foreground.png differ
diff --git a/sample/src/main/res/mipmap-hdpi/ic_launcher.png b/sample/src/main/res/mipmap-hdpi/ic_launcher.png
index 5bfd1e42..1ba57872 100644
Binary files a/sample/src/main/res/mipmap-hdpi/ic_launcher.png and b/sample/src/main/res/mipmap-hdpi/ic_launcher.png differ
diff --git a/sample/src/main/res/mipmap-hdpi/ic_launcher_foreground.png b/sample/src/main/res/mipmap-hdpi/ic_launcher_foreground.png
deleted file mode 100644
index 63bbeda6..00000000
Binary files a/sample/src/main/res/mipmap-hdpi/ic_launcher_foreground.png and /dev/null differ
diff --git a/sample/src/main/res/mipmap-hdpi/ic_launcher_round.png b/sample/src/main/res/mipmap-hdpi/ic_launcher_round.png
deleted file mode 100644
index dfe6fde3..00000000
Binary files a/sample/src/main/res/mipmap-hdpi/ic_launcher_round.png and /dev/null differ
diff --git a/sample/src/main/res/mipmap-xhdpi-v26/ic_launcher_foreground.png b/sample/src/main/res/mipmap-xhdpi-v26/ic_launcher_foreground.png
new file mode 100644
index 00000000..7361012f
Binary files /dev/null and b/sample/src/main/res/mipmap-xhdpi-v26/ic_launcher_foreground.png differ
diff --git a/sample/src/main/res/mipmap-xhdpi/ic_launcher.png b/sample/src/main/res/mipmap-xhdpi/ic_launcher.png
index 2bb8ba3d..8025e6dc 100644
Binary files a/sample/src/main/res/mipmap-xhdpi/ic_launcher.png and b/sample/src/main/res/mipmap-xhdpi/ic_launcher.png differ
diff --git a/sample/src/main/res/mipmap-xhdpi/ic_launcher_foreground.png b/sample/src/main/res/mipmap-xhdpi/ic_launcher_foreground.png
deleted file mode 100644
index 605adf67..00000000
Binary files a/sample/src/main/res/mipmap-xhdpi/ic_launcher_foreground.png and /dev/null differ
diff --git a/sample/src/main/res/mipmap-xhdpi/ic_launcher_round.png b/sample/src/main/res/mipmap-xhdpi/ic_launcher_round.png
deleted file mode 100644
index 4575fa1d..00000000
Binary files a/sample/src/main/res/mipmap-xhdpi/ic_launcher_round.png and /dev/null differ
diff --git a/sample/src/main/res/mipmap-xxhdpi-v26/ic_launcher_foreground.png b/sample/src/main/res/mipmap-xxhdpi-v26/ic_launcher_foreground.png
new file mode 100644
index 00000000..24f9ddbc
Binary files /dev/null and b/sample/src/main/res/mipmap-xxhdpi-v26/ic_launcher_foreground.png differ
diff --git a/sample/src/main/res/mipmap-xxhdpi/ic_launcher.png b/sample/src/main/res/mipmap-xxhdpi/ic_launcher.png
index e7dc9e94..11dcdbc9 100644
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