65.4 Implementing the SeekBar

The SeekBar controls the number of asynchronous coroutines, ranging from 1 to 2000, that are launched each time the button is clicked. Remaining within the activity_main.xml file, select the SeekBar and use the Attributes tool window to change the max property to 2000. Next, edit the MainActivity.kt file, add a variable in which to store the current slider setting and modify the onCreate() method to add a SeekBar listener:

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import android.widget.SeekBar

import kotlinx.android.synthetic.main.activity_main.*

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class MainActivity : AppCompatActivity() {

 

    private var count: Int = 1

 

    override fun onCreate(savedInstanceState: Bundle?) {

        super.onCreate(savedInstanceState)

        setContentView(R.layout.activity_main)

 

       ...