Question: I'm developing an Android app with the Android Developer Tool.
Now I tried the new Android Studio, everything works fine if connect my smartphone with the PC and directly run the program in the Android Studio.
But now I want to test the program with other smartphones without connecting them to my PC.

The ADT creates the .apk file under "projectname/bin" every time you compile the program. How I see it at the moment, Android Studio doesn't do that.

So, my question is: Is it possible to create an unsigned .apk file with Android Studio?

Answer: 
Following work for me: 

Keep following setting blank if you have made in build.gradle.

```
signingConfigs {
        release {
            storePassword ""
            keyAlias ""
            keyPassword ""
        }
    }

```

and choose Gradle Task from your Editor window. It will show list of all flavor if you have created.

![enter image description here](https://i.stack.imgur.com/XBJPV.png)
Steps for creating unsigned APK

```html
Steps for creating unsigned APK

• Click the dropdown menu in the toolbar at the top
• Select "Edit Configurations"
• Click the "+"
• Select "Gradle"
• Choose your module as a Gradle project
• In Tasks: enter assemble
• Press Run
• Your unsigned APK is now located in - ProjectName\app\build\outputs\apk

Note : Technically, what you want is an APK signed with a debug key. An APK that is actually unsigned will be refused by the device. So, Unsigned APK will give error if you install in device.
```

Note : Technically, what you want is an APK signed with a debug key. An APK that is actually unsigned will be refused by the device. So, Unsigned APK will give error if you install in device.