[1]install termux from https://github.com/termux/termux-app

[2]enter termux

[3]install proot-distro with to execute command of

apt install proot-distro

[4]install a distro with using proot-distro

[5]login the distro

[6]install a kind of conda such as miniconda and enter conda environment

[7]create a conda virtual environment and activate it

[8]install pytorch from binary

conda install pytorch torchvision torchaudio cpuonly -c pytorch

[9]install pytorch from source

[9.1]enable the option of android located in [setting>> developer options>> disable child process restrictiona]

[9.2]