Android Studio’s Android Virtual Device (AVD) is a powerful tool for emulating Android devices. However, it can be a bit confusing when it comes to network settings.
Typically, 127.0.0.1 (or localhost ) refers to itself, i.e., the current machine. However, in AVD, 127.0.0.1 refers to the emulator itself. In other words, the emulator sees itself as localhost.
Therefore, if you want to access the localhost on the development machine from the emulator, use 10.0.2.2. In other words, the URL to access the localhost on the development machine is http://10.0.2.2/になります.