diff --git a/main.go b/basic/main.go
similarity index 100%
rename from main.go
rename to basic/main.go
diff --git a/container/main.go b/container/main.go
new file mode 100644
index 0000000..ba6d012
--- /dev/null
+++ b/container/main.go
@@ -0,0 +1,25 @@
+package main
+
+import (
+	"image/color"
+
+	"fyne.io/fyne/v2"
+	"fyne.io/fyne/v2/app"
+	"fyne.io/fyne/v2/canvas"
+	"fyne.io/fyne/v2/container"
+)
+
+func main() {
+	application := app.New()
+	win := application.NewWindow("container")
+	win.SetMaster()
+	win.Resize(fyne.NewSize(300, 360))
+
+	green := color.NRGBA{0, 255, 0, 255}
+	txt1 := canvas.NewText("Hello", green)
+	txt2 := canvas.NewText("fyne", green)
+	txt2.Move(fyne.NewPos(20, 20))
+	content := container.NewWithoutLayout(txt1, txt2)
+	win.SetContent(content)
+	win.ShowAndRun()
+}
diff --git a/readme.md b/readme.md
index 470cf68..2a4268b 100644
--- a/readme.md
+++ b/readme.md
@@ -12,9 +12,10 @@
 #### 打包
 
 * go install fyne.io/fyne/v2/cmd/fyne@latest
-* fyne package -icon 
+* export ANDROID_NDK_HOME=/home/suguo/Android/android-ndk-r19c
+* fyne package -os android -appID me.myschools.fyne.basic -icon '/home/suguo/project/fyne-demo/Icon.png'
 * fyne package -os android -appID me.myschools.fyne-demo -icon '/Users/suguo/project/fyne-demo/Icon.png'
-    no Android NDK found in $ANDROID_HOME/ndk-bundle nor in $ANDROID_NDK_HOME
+
 
 #### 模拟器
 
@@ -24,4 +25,17 @@
 #### 资料
 
 * https://github.com/fyne-io/fyne
-* https://developer.fyne.io/
\ No newline at end of file
+* document https://developer.fyne.io/
+
+#### QA
+* no Android NDK found in $ANDROID_HOME/ndk-bundle nor in $ANDROID_NDK_HOME
+
+    只需要下载ndk包
+
+* 程序不能运行，提示'-'
+
+    包名称中不能包含‘－’
+
+* /usr/bin/ld: 找不到 -lXxf86vm: 没有那个文件或目录
+
+    sudo apt-get install libgl1-mesa-dev xorg-dev