ExoPlayer - play local mp4 file in SD card

Question

I am using the Exoplayer Demo app and want to preload a MP4 video from SD card. I have tried out the implementation from this post, but it does not work. There is no such class

Answer 1

If you need to get data from the assets field this will work. THIS WON'T WORK FOR DATA TAKEN FROM THE SD CARD

package com.studio.mattiaferigutti.exoplayertest

import android.annotation.SuppressLint
import android.net.Uri
import android.os.Bundle
import android.util.Log
import android.view.View
import androidx.appcompat.app.AppCompatActivity
import com.google.android.exoplayer2.*
import com.google.android.exoplayer2.source.ProgressiveMediaSource
import com.google.android.exoplayer2.trackselection.DefaultTrackSelector
import com.google.android.exoplayer2.upstream.*
import com.google.android.exoplayer2.upstream.DataSource.Factory
import com.google.android.exoplayer2.util.Util
import kotlinx.android.synthetic.main.activity_main.*


class MainActivity : AppCompatActivity(), Player.EventListener {

    private var player: SimpleExoPlayer? = null
    private var playWhenReady = true
    private var currentWindow = 0
    private var playbackPosition: Long = 0

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

    public override fun onStart() {
        super.onStart()
        if (Util.SDK_INT > 23) {
            initializePlayer("assets:///your_file.your_extension")
        }
    }

    public override fun onResume() {
        super.onResume()
        hideSystemUi()
        if (Util.SDK_INT <= 23 || player == null) {
            initializePlayer("assets:///your_file.your_extension")
        }
    }

    public override fun onPause() {
        super.onPause()
        if (Util.SDK_INT <= 23) {
            releasePlayer()
        }
    }

    public override fun onStop() {
        super.onStop()
        if (Util.SDK_INT > 23) {
            releasePlayer()
        }
    }

    private fun initializePlayer(path: String) {
        if (player == null) {
            val trackSelector = DefaultTrackSelector(this)
            trackSelector.setParameters(
                trackSelector.buildUponParameters().setMaxVideoSizeSd())
            player = SimpleExoPlayer.Builder(this)
                .setTrackSelector(trackSelector)
                .build()
        }
        video_view?.player = player
        video_view?.requestFocus()

        val dataSourceFactory = Factory { AssetDataSource(this@MainActivity) }

        val videoSource = ProgressiveMediaSource.Factory(dataSourceFactory)
            .createMediaSource(Uri.parse(path))

        player?.playWhenReady = playWhenReady
        player?.seekTo(currentWindow, playbackPosition)
        player?.addListener(this)
        player?.prepare(videoSource)
    }

    private fun releasePlayer() {
        if (player != null) {
            playbackPosition = player?.currentPosition!!
            currentWindow = player?.currentWindowIndex!!
            playWhenReady = player?.playWhenReady!!
            player?.removeListener(this)
            player?.release()
            player = null
        }
    }

    /**
     * set fullscreen
     */
    @SuppressLint("InlinedApi")
    private fun hideSystemUi() {
        video_view?.systemUiVisibility = (View.SYSTEM_UI_FLAG_LOW_PROFILE
                or View.SYSTEM_UI_FLAG_FULLSCREEN
                or View.SYSTEM_UI_FLAG_LAYOUT_STABLE
                or View.SYSTEM_UI_FLAG_IMMERSIVE_STICKY
                or View.SYSTEM_UI_FLAG_LAYOUT_HIDE_NAVIGATION
                or View.SYSTEM_UI_FLAG_HIDE_NAVIGATION)
    }

    override fun onPlayerError(error: ExoPlaybackException) {
        super.onPlayerError(error)

        //handle the error
    }

    override fun onPlayerStateChanged(playWhenReady: Boolean, playbackState: Int) {
        val stateString: String = when (playbackState) {
            ExoPlayer.STATE_IDLE -> "ExoPlayer.STATE_IDLE      -"
            ExoPlayer.STATE_BUFFERING -> "ExoPlayer.STATE_BUFFERING -"
            ExoPlayer.STATE_READY -> "ExoPlayer.STATE_READY     -"
            ExoPlayer.STATE_ENDED -> "ExoPlayer.STATE_ENDED     -"
            else -> "UNKNOWN_STATE             -"
        }
        Log.d(TAG, "changed state to " + stateString
                + " playWhenReady: " + playWhenReady)
    }

    companion object {
        private val TAG = MainActivity::class.java.name
    }
}