Textview email;

email.setPaintFlags(email.getPaintFlags() or Paint.UNDERLINE_TEXT_FLAG)

email.setOnClickListener {
val it = Intent(Intent.ACTION_SEND)
val tos = arrayOf("email@gmail.com")

it.putExtra(Intent.EXTRA_SUBJECT, "subject")
it.putExtra(Intent.EXTRA_EMAIL, tos)
it.type = "message/rfc822"

startActivity(Intent.createChooser(it, ""))
}

I was also facing the same issueremote: Repository not found fatal: repository 'https://github.com/MyRepo/project.git/' not found

I uninstalled the git credentials manager and reinstalled it and then I could easily pull and push to the repository. Here are the commands

$ git credential-manager uninstall

$ git credential-manager install

let image = UIImage(named: "image_name")?.withRenderingMode(.alwaysTemplate)

button.setImage(image, for: .normal)

button.tintColor = UIColor.red

이전에 GCM은 상당히 복잡했지만 지금은 너무나 간편해졌다.

- 2019.8.21 최신 업데이트

gradle(app) 추가

implementation 'com.google.firebase:firebase-messaging:19.0.1'
 

Menifest 추가

<service
        android:name=".java.MyFirebaseMessagingService"
        android:exported="false">
    <intent-filter>
        <action android:name="com.google.firebase.MESSAGING_EVENT" />
    </intent-filter>
</service>
 

Service Class 생성
 
class MyFirebaseMessagingService : FirebaseMessagingService() {

    override fun onNewToken(token: String?) {
        // Get updated InstanceID token.
        val refreshedToken = FirebaseInstanceId.getInstance().token
        Log.d(TAG, "Refreshed token: " + refreshedToken!!)

        //관리하는 DB에 Token 추가
    }


    override fun onMessageReceived(remoteMessage: RemoteMessage?) {
        Log.d(TAG, "From: " + remoteMessage!!.from!!)
    }

    companion object {
        private val TAG = "MyFirebaseMsgService"
    }
}

     끝!

Android -> S3

get Android key

https://console.aws.amazon.com/cognito/home 

Manage identity -> insert identity pool name -> enable access to unauthorized identities -> get aws credentials

Policy setting

http://awspolicygen.s3.amazonaws.com/policygen.html

select type: S3 bucket policy

Principal: *

Actions: get object

Arn:aws:s3:::(bucketname)/*

Statement 복사 S3 setting -> 붙여넣기

Android pro guard

# Class names are needed in reflection

-keepnames class com.amazonaws.**

-keepnames class com.amazon.**

# Request handlers defined in request.handlers

-keep class com.amazonaws.services.**.*Handler

# The following are referenced but aren't required to run

-dontwarn com.fasterxml.jackson.**

-dontwarn org.apache.commons.logging.**

# Android 6.0 release removes support for the Apache HTTP client

-dontwarn org.apache.http.**

# The SDK has several references of Apache HTTP client

-dontwarn com.amazonaws.http.**

-dontwarn com.amazonaws.metrics.**

로그아웃 버튼 클릭 시 

LoginManager.getInstance().logOut();

이전 Fragment에서 전환할때 fragmentTransaction.addToBackStack(null) 추가

해석을 하면 null이 아닌 파라미터가 null이다…. 뭔말이니? 찾아보니 파라미터 값이 null 일수도 있기 때문에 파라미터 뒤에 ?를 붙여줘야한다