Android开发基础实现音频文件的播放详解

<ImageView
    android:layout_width="wrap_content"
    android:layout_height="300dp"
    android:layout_gravity="center"
    android:src="@mipmap/rabbit"/>
<LinearLayout
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:orientation="horizontal">
    <Button
        android:id="@+id/stopAudio"
        android:layout_width="0dp"
        android:layout_height="wrap_content"
        android:layout_weight="1"
        android:text="@string/str_stop_audio"/>
    <Button
        android:id="@+id/playAudio"
        android:layout_width="0dp"
        android:layout_height="wrap_content"
        android:layout_weight="1"
        android:text="@string/str_play"/>
    <Button
        android:id="@+id/pauseAudio"
        android:layout_width="0dp"
        android:layout_height="wrap_content"
        android:layout_weight="1"
        android:text="@string/str_pause"/>
</LinearLayout>

private val mediaPlayer = MediaPlayer()

private fun initAudio() {
    initMediaPlayer()
    binding.playAudio.setOnClickListener {
        if (!mediaPlayer.isPlaying) {
            mediaPlayer.start()
        }
    }
    binding.pauseAudio.setOnClickListener {
        if (mediaPlayer.isPlaying) {
            mediaPlayer.pause()
        }
    }
    binding.stopAudio.setOnClickListener {
        if (!mediaPlayer.isPlaying) {
            mediaPlayer.reset()
            initMediaPlayer()
        }
    }
}
//初始化MediaPlayer
private fun initMediaPlayer() {
    val assetManager = assets
    val fd = assetManager.openFd("music.mp3")
    mediaPlayer.setDataSource(fd.fileDescriptor, fd.startOffset, fd.length)
    mediaPlayer.prepare()
}

//释放资源
mediaPlayer.stop()
mediaPlayer.release()