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ExoPlayer简易播放器

ExoPlayer简易播放器

一个简单的基于ExoPlayer的播放器。
ExoPlayer官网：https://exoplayer.dev/
使用ExoPlayer版本：2.18.2

实现功能：通过url播放视频，简易自定义controller，监听播放器状态变化，首帧时间打印，错误信息打印。

如果需要深层次的UI定制，建议不要用exo_ui库下面的布局，用SurfaceView和TextureView完全自定义。具体代码如下:

1.播放器Fragment

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import android.os.Bundle
import android.util.Log
import android.view.LayoutInflater
import android.view.View
import android.view.ViewGroup
import androidx.fragment.app.Fragment
import com.google.android.exoplayer2.ExoPlayer
import com.google.android.exoplayer2.MediaItem
import com.google.android.exoplayer2.PlaybackException
import com.google.android.exoplayer2.Player
import com.google.android.exoplayer2.Player.Listener
import com.google.android.exoplayer2.ui.StyledPlayerView

class ExoPlayerFragment : Fragment() {

    companion object {
        fun newInstance(url: String): ExoPlayerFragment {
            val args = Bundle()
            args.putString(EXO_URI, url)
            val fragment = ExoPlayerFragment()
            fragment.arguments = args
            return fragment
        }

        private const val TAG = "ExoPlayerFragment"
        private const val EXO_URI = "EXO_URI"
    }

    private var videoUri: String? = null
    private var player: ExoPlayer? = null

    private val listener = object : Listener {

        override fun onEvents(player: Player, events: Player.Events) {
            super.onEvents(player, events)
            Log.d(TAG, "onEvents->${events}:")
        }

        override fun onPlaybackStateChanged(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, "onPlaybackStateChanged: state=$stateString")
            super.onPlaybackStateChanged(playbackState)
            printPlayerTimeLine("onPlaybackStateChanged:")
        }

        override fun onRenderedFirstFrame() {
            super.onRenderedFirstFrame()
            printPlayerTimeLine("onRenderedFirstFrame:")
        }

        override fun onPlayerError(error: PlaybackException) {
            super.onPlayerError(error)
            printPlayerTimeLine("onPlayerError:")
            error.printStackTrace()
        }
    }

    override fun onCreateView(
        inflater: LayoutInflater,
        container: ViewGroup?,
        savedInstanceState: Bundle?
    ): View? {
        videoUri = arguments?.getString(EXO_URI)
        val root = inflater.inflate(R.layout.exo_player_fragment, container, false)
        val playerView = root.findViewById<StyledPlayerView>(R.id.styled_player_view)
        initPlayerView(playerView)
        return root
    }

    override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
        super.onViewCreated(view, savedInstanceState)
        startPlay()
    }

    private fun initPlayerView(playerView: StyledPlayerView) {
        Log.d(TAG, "initPlayerView: ")
        player = ExoPlayer.Builder(requireContext()).build()
        player?.addListener(listener)
        // Bind the player to the view.
        playerView.player = player

        // back
        playerView.findViewById<View>(R.id.back).setOnClickListener {
            fragmentManager?.popBackStack()
            val ft = fragmentManager?.beginTransaction()
            ft?.remove(this@ExoPlayerFragment)
            ft?.commitAllowingStateLoss()
        }
    }

    private var prepareTime: Long = 0L
    private fun printPlayerTimeLine(method: String) {
        val c = System.currentTimeMillis()
        val duration = if (prepareTime == 0L) 0 else c - prepareTime
        prepareTime = c
        Log.i(TAG, "printPlayerTimeLine: method=$method, duration=$duration, uri=${videoUri}")
    }

    private fun startPlay() {
        Log.d(TAG, "startPlay: ")
        videoUri?.let {
            // Build the media item.
            val mediaItem: MediaItem = MediaItem.fromUri(it)

            // Set the media item to be played.
            player?.setMediaItem(mediaItem)

            // Prepare the player.
            player?.prepare()
            printPlayerTimeLine("player->prepare:")

            // Start the playback.
            player?.play()
//            calPlayerTimeLine("player->play:")
        }
    }

    override fun onDestroy() {
        player?.release()
        super.onDestroy()
    }
}

2.播放器布局

exo_player_fragment.xml

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<?xml version="1.0" encoding="utf-8"?>

<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:background="@color/black"
    android:clickable="true">

    <com.google.android.exoplayer2.ui.StyledPlayerView
        android:id="@+id/styled_player_view"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:keepScreenOn="true"
        app:animation_enabled="false"
        app:controller_layout_id="@layout/custom_player_control_view"
        app:use_controller="true" />

</FrameLayout>

3.自定义的controller布局

custom_player_control_view.xml

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<?xml version="1.0" encoding="utf-8"?>

<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:layout_gravity="bottom"
    android:background="#00000000"
    android:layoutDirection="ltr"
    android:orientation="vertical"
    tools:targetApi="28">

    <ImageView
        android:id="@+id/back"
        android:layout_width="42dp"
        android:layout_height="42dp"
        android:layout_marginStart="16dp"
        android:layout_marginTop="16dp"
        android:background="#33000000"
        android:scaleType="centerInside"
        android:src="@mipmap/back"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent" />

    <LinearLayout
        android:id="@id/exo_bottom_bar"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:background="#33000000"
        android:gravity="center_vertical"
        android:orientation="horizontal"
        android:paddingTop="4dp"
        android:paddingBottom="4dp"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintStart_toStartOf="parent">


        <ImageButton
            android:id="@id/exo_prev"
            style="@style/ExoStyledControls.Button.Center.Previous"
            android:padding="8dp" />

        <ImageButton
            android:id="@id/exo_play_pause"
            style="@style/ExoStyledControls.Button.Center.PlayPause"
            android:padding="8dp" />

        <ImageButton
            android:id="@id/exo_next"
            style="@style/ExoStyledControls.Button.Center.Next"
            android:padding="8dp" />

        <TextView
            android:id="@id/exo_position"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:includeFontPadding="false"
            android:paddingLeft="4dp"
            android:paddingRight="4dp"
            android:textColor="#FFBEBEBE"
            android:textSize="14sp"
            android:textStyle="bold" />

        <com.google.android.exoplayer2.ui.DefaultTimeBar
            android:id="@id/exo_progress"
            android:layout_width="0dp"
            android:layout_height="26dp"
            android:layout_weight="1" />

        <TextView
            android:id="@id/exo_duration"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:includeFontPadding="false"
            android:paddingLeft="4dp"
            android:paddingRight="4dp"
            android:textColor="#FFBEBEBE"
            android:textSize="14sp"
            android:textStyle="bold" />

    </LinearLayout>


</androidx.constraintlayout.widget.ConstraintLayout>
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