diff --git a/.obsidian/workspace b/.obsidian/workspace
index 0cb6d15..c0087e4 100644
--- a/.obsidian/workspace
+++ b/.obsidian/workspace
@@ -9,7 +9,7 @@
         "state": {
           "type": "markdown",
           "state": {
-            "file": "02. PARA/01. Project（專案）/008. Sentinel.md",
+            "file": "02. PARA/02. Area（領域）/20150803 - Android/ADB 取得 APK 的 icon.md",
             "mode": "source",
             "source": true
           }
@@ -69,7 +69,7 @@
             "state": {
               "type": "backlink",
               "state": {
-                "file": "02. PARA/01. Project（專案）/008. Sentinel.md",
+                "file": "02. PARA/02. Area（領域）/20150803 - Android/ADB 取得 APK 的 icon.md",
                 "collapseAll": false,
                 "extraContext": false,
                 "sortOrder": "alphabetical",
@@ -86,7 +86,7 @@
             "state": {
               "type": "outline",
               "state": {
-                "file": "02. PARA/01. Project（專案）/008. Sentinel.md"
+                "file": "02. PARA/02. Area（領域）/20150803 - Android/ADB 取得 APK 的 icon.md"
               }
             }
           }
@@ -116,6 +116,8 @@
   },
   "active": "ec13ce58b15fa6d4",
   "lastOpenFiles": [
+    "02. PARA/02. Area（領域）/20150803 - Android/ADB 取得 APK 的 icon.md",
+    "02. PARA/02. Area（領域）/20150803 - Android/ADB.md",
     "02. PARA/01. Project（專案）/008. Sentinel.md",
     "02. PARA/03. Resources（資源）/QT/QVariant.md",
     "00. TOP/01. TODO.md",
@@ -123,8 +125,6 @@
     "01. Daily/2021/06/2021-06-10(週四).md",
     "02. PARA/03. Resources（資源）/OpenGL.md",
     "02. PARA/03. Resources（資源）/C++17/Structured binding declaration.md",
-    "02. PARA/03. Resources（資源）/Tool Setup/Chrome.md",
-    "02. PARA/03. Resources（資源）/買書清單.md",
-    "02. PARA/03. Resources（資源）/量子電腦.md"
+    "02. PARA/03. Resources（資源）/Tool Setup/Chrome.md"
   ]
 }
\ No newline at end of file
diff --git a/02. PARA/02. Area（領域）/20150803 - Android/ADB 取得 APK 的 icon.md b/02. PARA/02. Area（領域）/20150803 - Android/ADB 取得 APK 的 icon.md
new file mode 100644
index 0000000..4268a8f
--- /dev/null
+++ b/02. PARA/02. Area（領域）/20150803 - Android/ADB 取得 APK 的 icon.md	
@@ -0,0 +1,7 @@
+所有 apk 在安裝之後必須要 launcher 註冊，並將 icon 存在 launcher 的 `app_icons.db` 裡面。
+launcher 的 package 是 `com.android.launcher3`，所以 `app_icons.db` 的位置在 `/data/data/com.android.launcher3/databases/launcher.db`。
+
+用 SQLiteDatabaseBrowserPortable.exe 之類的工具可以打開 `app_icons.db`，其內容如下：
+![[Pasted image 20220712100904.png|800]]
+
+icon 欄位的blob就是icon的圖檔，看來是PNG檔。
\ No newline at end of file
diff --git a/attachments/Pasted image 20220712100904.png b/attachments/Pasted image 20220712100904.png
new file mode 100644
index 0000000..6e73e69
Binary files /dev/null and b/attachments/Pasted image 20220712100904.png differ