android 11 AOSP emulator problem

[Emrah Mr]

I try to develop android system, I have some problems about development. I get used to ubuntu18 and tag of android 11 is android-11.0.0_r17, I have built successfully with lunch 30 "aosp_x86-eng" and I have seen $OUT files and checked then I prepared test_aosp.sh file under ~/bin the results are like that and no emulator window appears: 

$ ./test_aosp.sh 

emulator: Android emulator version 30.0.21.0 (build_id 6647651) (CL:N/A) 

emulator: Found AVD name 'a25x86' 

emulator: Found AVD target architecture: x86 

emulator: argv[0]: 'emulator'; program directory: '/home/ubuntu/aosp/prebuilts/android-

emulator/linux-x86_64' PANIC: Cannot find AVD system path. Please define ANDROID_SDK_ROOT

the content of test_aosp.sh is : 

#!/bin/sh 

emulator -avd a25x86 -verbose -show-kernel -system $OUT/system.img -ramdisk $OUT/ramdisk.img -initdata $OUT/userdata.img

when I checked ROGER YE notes, before that partition he had run ~/Android/Sdk/emulato/emulator @a25x86, also I did it with the last version of android-studio.

Also I try to do following thing but is has loop in the command line and the black window of emulator shows up but not appear any menu and any more: 

$ sudo ~/Android/Sdk/emulator/emulator -avd a25x86 -verbose -show-kernel -system $OUT/system.img -ramdisk $OUT/ramdisk.img -initdata $OUT/userdata.img

also I have checked the emulator location with the following command: 

$ which emulator 

/home/ubuntu/aosp/prebuilts/android-emulator/linux-x86_64/emulator

also I want to add following results, maybe you want to check it: 

$ printenv |grep ANDROID 

ANDROID_DEV_SCRIPTS=/home/ubuntu/aosp/development/scripts:/home/ubuntu/aosp/prebuilts/devtools/tools:/home/ubuntu/aosp/external/selinux/prebuilts/bin:/home/ubuntu/aosp/prebuilts/misc/linux-x86/dtc:/home/ubuntu/aosp/prebuilts/misc/linux-x86/libufdt ANDROID_TOOLCHAIN_2ND_ARCH= ANDROID_PRE_BUILD_PATHS=/home/ubuntu/aosp/prebuilts/jdk/jdk11/linux-x86/bin: ANDROID_HOST_OUT_TESTCASES=/home/ubuntu/aosp/out/host/linux-x86/testcases ANDROID_JAVA_TOOLCHAIN=/home/ubuntu/aosp/prebuilts/jdk/jdk11/linux-x86/bin ANDROID_TARGET_OUT_TESTCASES=/home/ubuntu/aosp/out/target/product/generic_x86/testcases ANDROID_BUILD_TOP=/home/ubuntu/aosp ANDROID_BUILD_PATHS=/home/ubuntu/aosp/out/soong/host/linux-x86/bin:/home/ubuntu/aosp/out/host/linux-x86/bin:/home/ubuntu/aosp/prebuilts/gcc/linux-x86/x86/x86_64-linux-android-4.9/bin:/home/ubuntu/aosp/development/scripts:/home/ubuntu/aosp/prebuilts/devtools/tools:/home/ubuntu/aosp/external/selinux/prebuilts/bin:/home/ubuntu/aosp/prebuilts/misc/linux-x86/dtc:/home/ubuntu/aosp/prebuilts/misc/linux-x86/libufdt:/home/ubuntu/aosp/prebuilts/clang/host/linux-x86/llvm-binutils-stable:/home/ubuntu/aosp/prebuilts/android-emulator/linux-x86_64:/home/ubuntu/aosp/prebuilts/asuite/acloud/linux-x86:/home/ubuntu/aosp/prebuilts/asuite/aidegen/linux-x86:/home/ubuntu/aosp/prebuilts/asuite/atest/linux-x86: ANDROID_EMULATOR_PREBUILTS=/home/ubuntu/aosp/prebuilts/android-emulator/linux-x86_64 ANDROID_PRODUCT_OUT=/home/ubuntu/aosp/out/target/product/generic_x86 ANDROID_PYTHONPATH=/home/ubuntu/aosp/development/python-packages: ANDROID_TOOLCHAIN=/home/ubuntu/aosp/prebuilts/gcc/linux-x86/x86/x86_64-linux-android-4.9/bin ANDROID_JAVA_HOME=/home/ubuntu/aosp/prebuilts/jdk/jdk11/linux-x86 ANDROID_HOST_OUT=/home/ubuntu/aosp/out/host/linux-x86

Could you guide me? 

Thank you 

Regards