AndroidSoundboard/app/src/main/java/de/mlte/soundboard/MainActivity.kt

package de.mlte.soundboard

import android.animation.ObjectAnimator
import android.app.Activity
import android.content.Context
import android.content.Intent
import android.media.MediaPlayer
import android.net.Uri
import android.os.Bundle
import android.support.v7.app.AppCompatActivity
import android.view.LayoutInflater
import android.view.animation.LinearInterpolator
import android.widget.FrameLayout
import android.widget.GridLayout
import android.widget.ProgressBar
import android.widget.TextView
import java.io.BufferedInputStream
import java.io.BufferedOutputStream


class MainActivity : AppCompatActivity() {
    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContentView(R.layout.activity_main)

        duplicateButton()

        loadPreferences()

        var player: MediaPlayer? = null
        val progressBar = findViewById<ProgressBar>(R.id.progress_bar)
        val objectAnimator = ObjectAnimator.ofInt(progressBar, "progress", progressBar.getProgress(), 1000)
        objectAnimator.interpolator = LinearInterpolator()
        progressBar.max = 1000
        objectAnimator.addUpdateListener({ valueAnimator ->
            val progress = valueAnimator.animatedValue as Int
            progressBar.progress = progress
        })
        var playing = false

        val btn = findViewById<TextView>(R.id.text_view_button)
        btn.setOnClickListener {
            if (playing) {
                player?.let { mp ->
                    if (mp.isPlaying) {
                        mp.stop()
                    }
                    mp.reset()
                    mp.release()
                }
                objectAnimator.cancel()
                playing = false
                progressBar.progress = 0
            } else {
                val file = getFileStreamPath("audio")
                if (file.exists()) {
                    val mp = MediaPlayer.create(this, Uri.fromFile(file))
                    mp.setOnCompletionListener {
                        progressBar.progress = 0
                        mp.reset()
                        mp.release()
                        playing = false
                    }
                    mp.start()
                    player = mp
                    playing = true

                    progressBar.progress = 0
                    objectAnimator.setDuration(mp.duration.toLong()).start()
                }
            }
        }

        btn.setOnLongClickListener {
            val intent = Intent(baseContext, EditActivity::class.java)
            intent.putExtra("caption", btn.text)
            startActivityForResult(intent, 1234)

            true
        }
    }

    private fun duplicateButton() {
        val inflater = getSystemService(Context.LAYOUT_INFLATER_SERVICE) as LayoutInflater
        val parent = findViewById<GridLayout>(R.id.grid_layout)

        parent.columnCount = 2

        for (row in 0..1) {
            for (col in 0..1) {
                val soundButton = SoundButton(this, col, row)
                parent.addView(soundButton)
            }
        }
    }

    private fun loadPreferences() {
        val preferences = getPreferences(Context.MODE_PRIVATE)
        val caption = preferences.getString("caption", "")
        val btn = findViewById<TextView>(R.id.text_view_button)
        btn.setText(caption)
    }

    override fun onActivityResult(requestCode: Int, resultCode: Int, data: Intent?) {
        super.onActivityResult(requestCode, resultCode, data)

        if (requestCode == 1234 && resultCode == Activity.RESULT_OK && data != null) {
            val btn = findViewById<TextView>(R.id.text_view_button)
            val caption = data.getStringExtra("caption")
            if (caption != null) {
                btn.setText(caption)
            }
            val uri = data.getParcelableExtra<Uri>("uri")
            savePreferences(caption, uri)
        }
    }

    private fun savePreferences(caption: String, uri: Uri?) {
        val btn = findViewById<TextView>(R.id.text_view_button)
        val editor = getPreferences(Context.MODE_PRIVATE).edit()
        editor.putString("caption", btn.text.toString())
        editor.commit()

        uri?.let { uri ->
            grantUriPermission(getPackageName(), uri, Intent.FLAG_GRANT_READ_URI_PERMISSION)
            val output = BufferedOutputStream(openFileOutput("audio", Context.MODE_PRIVATE))
            val input = BufferedInputStream(getContentResolver().openInputStream(uri))
            try {
                val buf = ByteArray(1024)
                input.read(buf)
                do {
                    output.write(buf)
                } while (input.read(buf) !== -1)
            } finally {
                input.close()
                output.close()
            }
        }
    }
}