I added a new launcher icon to my application by following the path below.
Res> new > Immage Asset
and AndroidManifest.xml look like that :
<application
android:allowBackup="true"
android:icon="@mipmap/ic_launcher"
android:label="@string/app_name"
android:roundIcon="@mipmap/ic_launcher_round"
android:supportsRtl="true"
android:theme="@style/AppTheme">
I want to create a circle logo, but my phone has a square logo, but a circle on the emulator.What could this be caused by? (also the logo of all the apps on my phone is square)
You app icon, is basically a background with a mask on top. Different Android manufacturers use different masks. Some use a square image, and some use rounded images. Hence, the result is different for many devices. Looks like your device happens to use a square mask.
A lot of devices have an option to change this in the general settings of your phone. E.g. for One Plus, you can find it under "Customisation | System Icons"