你的activity 不是public 的
emulator -avd xx
一直报错：
PANIC: Missing emulator engine program for ‘x86’ CPU.
最终找到原因：
在创建虚拟机的时候，AS会默认推荐下载带Google APIs的x86 Images，由于大陆对google的限制，所以会导致报错。
解决办法，下载不带Google APIs的x86 Images, 然后再重启终端，重新输入命令，成功启动安卓虚拟机。
android
running gradle task assembledebug stuck
Here is solution in my case.
- Open your flutter Project directory.
- Change directory to android directory in your flutter project directory
cd android - clean gradle
./gradlew clean - Build gradle
./gradlew buildor you can combine both commands with just./gradlew clean build(Thanks @daniel for the tip) - Now run your flutter project. If you use vscode, press F5. First time gradle running assembleDebug will take time.
PS: Delete gradle in case of all that steps don’t work