Android studio SeekbarChangelistner上的接口没有构造函数/未找到要实现的成员

[！[无法实现Menbers`package com.manan.musicx

导入android.content.Context 导入android.media.AudioManager 导入android.media.MediaPlayer 导入androidx.appcompat.app.appcompat活动 导入android.os.Bundle 导入android.provider.MediaStore 导入android.widget.Button 导入android.widget.MediaController 导入android.widget.SeekBar

类MainActivity:AppCompatActivity（）{

---

}`]]您应该将

Seekbar.onseekbarchaneglistener编写为：

sbVolume.setOnSeekBarChangeListener(object : SeekBar.OnSeekBarChangeListener {
    override fun onProgressChanged(seekBar: SeekBar?, progress: Int, fromUser: Boolean) {
        //onProgressChanged
    }

    override fun onStartTrackingTouch(seekBar: SeekBar?) {
        //onStartTrackingTouch
    }

    override fun onStopTrackingTouch(seekBar: SeekBar?) {
        //onStopTrackingTouch
    }
})

private class MySeekbarChangeListener : SeekBar.OnSeekBarChangeListener {
    override fun onProgressChanged(seekBar: SeekBar?, progress: Int, fromUser: Boolean) {
        //onProgressChanged
    }

    override fun onStartTrackingTouch(seekBar: SeekBar?) {
        //onStartTrackingTouch
    }

    override fun onStopTrackingTouch(seekBar: SeekBar?) {
        //onStopTrackingTouch
    }
}

或者创建一个类，实现
SeekBar.onseekbarchaneglistener
为：

sbVolume.setOnSeekBarChangeListener(object : SeekBar.OnSeekBarChangeListener {
    override fun onProgressChanged(seekBar: SeekBar?, progress: Int, fromUser: Boolean) {
        //onProgressChanged
    }

    override fun onStartTrackingTouch(seekBar: SeekBar?) {
        //onStartTrackingTouch
    }

    override fun onStopTrackingTouch(seekBar: SeekBar?) {
        //onStopTrackingTouch
    }
})

private class MySeekbarChangeListener : SeekBar.OnSeekBarChangeListener {
    override fun onProgressChanged(seekBar: SeekBar?, progress: Int, fromUser: Boolean) {
        //onProgressChanged
    }

    override fun onStartTrackingTouch(seekBar: SeekBar?) {
        //onStartTrackingTouch
    }

    override fun onStopTrackingTouch(seekBar: SeekBar?) {
        //onStopTrackingTouch
    }
}

并将其用作：

sbVolume.setOnSeekBarChangeListener(MySeekbarChangeListener())