Android Networking: Fundamentals

Sep 6 2022 · Kotlin 1.6, Android 12, Android Studio Chipmunk | 2021.2.1 Patch 1

Part 1: Learn About HTTP & Threading

04. Create a HTTP Connection

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Previous episode: 03. Connect to the Internet Next episode: 05. Parse Data as JSON

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Notes: 04. Create a HTTP Connection

The student materials have been reviewed and are updated as of July 2022.

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After creating the NetworkStatusChecker, you can implement and API call or request, to register a user!

private val networkStatusChecker by lazy {
  NetworkStatusChecker(getSystemService(ConnectivityManager::class.java))
}
networkStatusChecker.performIfConnectedToInternet {
 ...
}
Thread(Runnable {

}).start()
Thread(Runnable {
  val connection = URL("$BASE_URL/api/register").openConnection() as HttpURLConnection
  connection.requestMethod = "POST"
  connection.setRequestProperty("Content-Type", "application/json")
  connection.setRequestProperty("Accept", "application/json")
}).start()
Thread(Runnable {
  val connection = URL("$BASE_URL/api/register").openConnection() as HttpURLConnection
  connection.requestMethod = "POST"
  connection.setRequestProperty("Content-Type", "application/json")
  connection.setRequestProperty("Accept", "application/json")
  connection.readTimeout = 10000
  connection.connectTimeout = 10000
  connection.doOutput = true
  connection.doInput = true
}).start()
Thread(Runnable {
  val connection = URL("$BASE_URL/api/register").openConnection() as HttpURLConnection
  connection.requestMethod = "POST"
  connection.setRequestProperty("Content-Type", "application/json")
  connection.setRequestProperty("Accept", "application/json")
  connection.readTimeout = 10000
  connection.connectTimeout = 10000
  connection.doOutput = true
  connection.doInput = true

  val body = "{\"name\":\"${userDataRequest.name}\", \"email\":\"${userDataRequest.email}\", " +
      "\"password\":\"${userDataRequest.password}\"}"

  val bytes = body.toByteArray()
}).start()
Thread(Runnable {
  val connection = URL("$BASE_URL/api/register").openConnection() as HttpURLConnection
  connection.requestMethod = "POST"
  connection.setRequestProperty("Content-Type", "application/json")
  connection.setRequestProperty("Accept", "application/json")
  connection.readTimeout = 10000
  connection.connectTimeout = 10000
  connection.doOutput = true
  connection.doInput = true

  val body = "{\"name\":\"${userDataRequest.name}\", \"email\":\"${userDataRequest.email}\", " +
      "\"password\":\"${userDataRequest.password}\"}"

  val bytes = body.toByteArray()

  try {
    connection.outputStream.use { outputStream ->
      outputStream.write(bytes)
    }
  } catch (error: Throwable) {
    
  }
}).start()
Thread(Runnable {
  val connection = URL("$BASE_URL/api/register").openConnection() as HttpURLConnection
  connection.requestMethod = "POST"
  connection.setRequestProperty("Content-Type", "application/json")
  connection.setRequestProperty("Accept", "application/json")
  connection.readTimeout = 10000
  connection.connectTimeout = 10000
  connection.doOutput = true
  connection.doInput = true

  val body = "{\"name\":\"${userDataRequest.name}\", \"email\":\"${userDataRequest.email}\", " +
      "\"password\":\"${userDataRequest.password}\"}"

  val bytes = body.toByteArray()

  try {
    connection.outputStream.use { outputStream ->
      outputStream.write(bytes)
    }

    val reader = InputStreamReader(connection.inputStream)

    reader.use { input ->
      val response = StringBuilder()
      val bufferedReader = BufferedReader(input)

      bufferedReader.useLines { lines ->
        lines.forEach {
          response.append(it.trim())
        }
      }

    }
  } catch (error: Throwable) {
    
  }
}).start()
Thread(Runnable {
  val connection = URL("$BASE_URL/api/register").openConnection() as HttpURLConnection
  connection.requestMethod = "POST"
  connection.setRequestProperty("Content-Type", "application/json")
  connection.setRequestProperty("Accept", "application/json")
  connection.readTimeout = 10000
  connection.connectTimeout = 10000
  connection.doOutput = true
  connection.doInput = true

  val body = "{\"name\":\"${userDataRequest.name}\", \"email\":\"${userDataRequest.email}\", " +
      "\"password\":\"${userDataRequest.password}\"}"

  val bytes = body.toByteArray()

  try {
    connection.outputStream.use { outputStream ->
      outputStream.write(bytes)
    }

    val reader = InputStreamReader(connection.inputStream)

    reader.use { input ->
      val response = StringBuilder()
      val bufferedReader = BufferedReader(input)

      bufferedReader.useLines { lines ->
        lines.forEach {
          response.append(it.trim())
        }
      }

      onUserCreated(response.toString(), null)
    }
  } catch (error: Throwable) {
    onUserCreated(null, error)
  }

  connection.disconnect()
}).start()
runOnUiThread {
...
}