PostActivity.kt

package io.github.bugaevc.phread

import android.content.Context
import android.os.Bundle
import android.support.v4.app.LoaderManager
import android.support.v4.app.ShareCompat
import android.support.v4.content.AsyncTaskLoader
import android.support.v4.content.Loader
import android.support.v7.app.AppCompatActivity

import kotlinx.android.synthetic.main.activity_post.*
import kotlinx.android.synthetic.main.content_post.*

import org.jsoup.Jsoup

import java.net.URL

import okhttp3.OkHttpClient
import okhttp3.Request

class PostActivity : AppCompatActivity(), LoaderManager.LoaderCallbacks<PostActivity.PostData> {

    companion object {
        val POST_LOADER_ID: Int = 0
    }

    data class PostData(var title: String, val htmlText: String)

    private lateinit var url: String

    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContentView(R.layout.activity_post)
        setSupportActionBar(toolbar)

        url = intent.dataString

        fab.setOnClickListener {
            ShareCompat.IntentBuilder
                .from(this)
                .setText(url)
                .setType("text/plain")
                .startChooser()
        }
        supportActionBar!!.setDisplayHomeAsUpEnabled(true)

        supportLoaderManager.initLoader(POST_LOADER_ID, null, this).forceLoad()
    }

    override fun onCreateLoader(id: Int, args: Bundle?) = PostLoader(this, URL(url))

    override fun onLoadFinished(loader: Loader<PostData>, result: PostData?) {
        if (result == null) {
            return
        }
        webView.loadDataWithBaseURL(url, result.htmlText, "text/html", null, null)
        toolbar_layout.title = result.title
    }

    override fun onLoaderReset(loader: Loader<PostData>?) {
        TODO("not implemented")
    }

    class PostLoader(context: Context, val url: URL) : AsyncTaskLoader<PostData>(context) {
        override fun loadInBackground(): PostData? {
            try {
                // fetch the post from the network
                val client = OkHttpClient()
                val request = Request.Builder().url(url).build()
                val response = client.newCall(request).execute()
                val content = response.body().string()
                // parse it
                val doc = Jsoup.parse(content.replace("<br>", "\n"), url.toString())
                return PostData(
                        title = doc.select("header").text(),
                        htmlText = doc.select("div.content").html()
                )
            } catch (e: Exception) {
                e.printStackTrace()
                return null
            }
        }
    }
}