เขียน Plugin Android สำหรับ Unity3d ด้วย Kotlin เพื่อรับผลจาก onActivityResult โดยไม่ต้อง override activity หลัก

class LineSDKActivity : AppCompatActivity() {

    companion object {
        lateinit var lineLoginCallback: LineLoginCallback

        fun startLineSDKActivity(activity: Activity, lineLoginCallback: LineLoginCallback) {
            LineSDKActivity.lineLoginCallback = lineLoginCallback;
            val intent = Intent(activity._applicationContext_, LineSDKActivity::class._java_)
            activity.startActivity(intent);
        }
    }

    data class PlayerProfile(
            val displayName: String,
            val statusMessage: String?,
            val userId: String,
            val pictureUri: Uri?
    )

    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)

        login()
    }

    override fun onActivityResult(requestCode: Int, resultCode: Int, data: Intent?) {
        super.onActivityResult(requestCode, resultCode, data)
        if (requestCode != Constants.REQUEST\_CODE) {
            Log.e("ERROR", "Unsupported Request");
            lineLoginCallback.onLoginFailed("Unsupported Request")
            finish()
        }

        if (data == null) {
            lineLoginCallback.onLoginFailed("Can't connect with Line")
            finish()
        }

        val result: LineLoginResult = LineLoginApi.getLoginResultFromIntent(data)

        when (result._responseCode_) {
            LineApiResponseCode.SUCCESS -> {
                lineLoginCallback.onLoginSuccess(
                        result._lineProfile_!!._displayName_  
)
            }
            else -> {
                lineLoginCallback.onLoginFailed("Login Unsuccessful")
            }
        }

        finish()

    }

    fun login() {
        startActivityForResult(getLineLoginIntent(), Constants.REQUEST\_CODE)
    }

    private fun getLineLoginIntent() : Intent {
        return LineLoginApi.getLoginIntent(this._applicationContext_, Constants.CHANNEL\_ID)
    }
}

interface LineLoginCallback {
    fun onLoginSuccess(displayName: String)
    fun onLoginFailed(errorMessage: String)
}

dependencies {
    implementation fileTree(dir: 'libs', include: ['\*.jar'])
    implementation 'androidx.appcompat:appcompat:1.0.0-beta01'
    implementation 'androidx.browser:browser:1.0.0-beta01'
    implementation "org.jetbrains.kotlin:kotlin-stdlib-jdk7:$kotlin\_version"
    implementation(name: 'line-sdk-4.0.8', ext: 'aar')
}

implementation(name:'line-sdk-4.0.8', ext:'aar')
implementation 'org.jetbrains.kotlin:kotlin-stdlib-jdk7:1.2.51'
implementation 'androidx.appcompat:appcompat:1.0.0-alpha1'
implementation 'androidx.browser:browser:1.0.0-alpha1'

// LineSDK.cs

public class LineSDK {
  public class LineLoginCallback : AndroidJavaProxy {
    public LineLoginCallback : base("xxx.xx.xxx.LineSDKActivity") {}

    public void onLoginSuccess(string displayName) {
      Debug.Log("Line login success");
    }

    public void onLoginFailed(string errorMessage) {
      Debug.Log("Line login failed");
    }
  }

  ...
}

...

<activity
  android:name="app.zosimos.linesdk.LineSDKActivity"
  android:theme="@style/Theme.AppCompat.NoActionBar"
/>

...