Generally, you don't need it, but if your PC memory is less than 4G and the CPU is not very powerful, then buy a cheap mobile phone. If the PC is ok, it can be developed with the android virtual machine.

You only need to go to Android official website to download the Android sdk development kit and bring an emulator, but it should be noted that official website can't access it because of the "wall". You can download the SDK development kit from the Chinese community of android studio:

http://www.android-studio.org/index.php/download

When the download is complete, the directory will appear:

Click sdk Manager to download the images of the required SDK and emulator.

Take andorid7.0 as an example:

The screenshot above is all the image files of ADI. You can choose one of them to download what kind of devices you want to develop, which contains images of 64-bit intel, ARM mobile phone, TV, Wear watch and other devices.

Return to the SDK root directory after downloading. Start AVD Manager (android Virtual Device Manager)

The Virtual Device Management screen appears.

Click Create on the right to create the device you want:

There are devices with different resolutions, so I won't describe the details. After creating them, click OK.

When the screen above appears, just click Start. It takes time to load for the first time, please be patient.