事前作業

Serverkey取得

Firebaseコンソールから確認できます。

token取得

FirebaseInstanceId.getInstance().instanceId
        .addOnCompleteListener(OnCompleteListener { task ->
            if (!task.isSuccessful) {
                Log.w(TAG, "getInstanceId failed", task.exception)
                return@OnCompleteListener
            }

            // Get new Instance ID token
            val token = task.result?.token

            // Log and toast
            val msg = getString(R.string.msg_token_fmt, token)
            Log.d(TAG, msg)
            Toast.makeText(baseContext, msg, Toast.LENGTH_SHORT).show()
        })

スクリプト

push_test.sh

# !/bin/bash
token='xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxWmdyQhVDolOSTp_XRjmv'
server_key='AAAAjfX2vXY:APxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx'

read -r -d '' payload <<-'EOF'
{
     "title":"ホゲホゲ",
     "body":"hugahuga"
}
EOF

echo $payload

curl \
    --header "Authorization: key=${server_key}" \
    --header Content-Type:"application/json" \
    https://fcm.googleapis.com/fcm/send \
    -d "{
        \"to\" : \"${token}\",
        \"data\": $payload
    }"

実行

下記のスクリプト叩くだけ

/bin/bash push_test.sh

以上。