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「Android/kotlin/http通信」の版間の差分

提供: 初心者エンジニアの簡易メモ
移動: 案内検索
(asynkでアクセス)
行41: 行41:
 
     override fun doInBackground(vararg p: Void?): Boolean {
 
     override fun doInBackground(vararg p: Void?): Boolean {
 
         var httpRequest = HttpRequest()
 
         var httpRequest = HttpRequest()
         var success = httpRequest.request("https://example.com/?hogehoge")
+
         var success: Boolean = httpRequest.request("https://example.com/?hogehoge")
 
         Log.i(TAG, "body=" + httpRequest.getBody())
 
         Log.i(TAG, "body=" + httpRequest.getBody())
 
         return false
 
         return false

2020年2月14日 (金) 12:13時点における版

サンプル

HttpRequest.kt

class HttpRequest {
    private var body = "";
    fun request(requestUrl: String): Boolean {
        if (requestUrl.isEmpty()) {
            Log.w(TAG, "URLが空です。")
            return false
        }
        val url = URL(requestUrl)
        val urlConnection = url.openConnection() as HttpURLConnection
        urlConnection.requestMethod = "GET"
        urlConnection.connect()
        val br = BufferedReader(InputStreamReader(urlConnection.inputStream))
        val sb = StringBuilder()
        for (line: String? in br.readLines()) {
            line?.let { sb.append(line) }
        }
        br.close()
        body = sb.toString()
        return true
    }
    fun getBody(): String {
        return body
    }
    companion object {
        private const val TAG = "HttpRequest"
    }
}

参考:https://qiita.com/naoi/items/8df1409ad48ad8f3c632

asyncでアクセス

直アクセスだとアクセスできないのでAsyncTaskをかます。

HttpAsyncTask.kt

import android.os.AsyncTask
class HttpAsyncTask : AsyncTask<Void, Void, Boolean>() {
    override fun doInBackground(vararg p: Void?): Boolean {
        var httpRequest = HttpRequest()
        var success: Boolean = httpRequest.request("https://example.com/?hogehoge")
        Log.i(TAG, "body=" + httpRequest.getBody())
        return false
    }
    override fun onPostExecute(result: Boolean?) {
        super.onPostExecute(result)
    }
    companion object {
        private const val TAG = "HttpAsyncTask"
    }
}