Is there a similar function just like onStopTrackingTouch of SeekBar with verticalSeekBar control in Android?

user_828896 0
Viewed 163

The VerticalSeekBar control is a vertical seekBar, you can see more details at https://github.com/lukelorusso/VerticalSeekBar .

Is there a event function in VerticalSeekBar control just like onStopTrackingTouch in SeekBar control?

I hope to do something in VerticalSeekBar when I stop to thumb.

Code A

horizontalSeekBar?.setOnSeekBarChangeListener(object : SeekBar.OnSeekBarChangeListener {
            override fun onProgressChanged(seekBar: SeekBar, i: Int, b: Boolean) {
                // Display the current progress of SeekBar
            }

            override fun onStartTrackingTouch(seekBar: SeekBar) {
                // Do something
            }

            override fun onStopTrackingTouch(seekBar: SeekBar) {                
                requireContext().toast(seekBar.progress.toString() +"M")
            }
})


verticalSeekBar?.setOnProgressChangeListener { progressValue ->
      requireContext().toast(  progressValue.toString()+"X")
}

Layout A

<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:id="@+id/camera_ui_container"
        android:layout_width="match_parent"
        android:layout_height="match_parent">


    <SeekBar
            android:id="@+id/horizontalSeekBar"
            android:layout_width="100dp"
            android:layout_height="30dp"

            android:background="@color/white"

            android:max="10"
            android:thumb="@drawable/ic_thumb"

            app:layout_constraintBottom_toBottomOf="parent"
            app:layout_constraintEnd_toEndOf="@+id/verticalSeekBar"
            app:layout_constraintStart_toStartOf="parent"
            app:layout_constraintTop_toTopOf="parent" />


    <com.lukelorusso.verticalseekbar.VerticalSeekBar
            android:id="@+id/verticalSeekBar"
            android:layout_width="30dp"
            android:layout_height="150dp"

            app:layout_constraintBottom_toBottomOf="parent"
            app:layout_constraintEnd_toEndOf="parent"
            app:layout_constraintTop_toTopOf="parent"
            app:vsb_progress="2" />

</androidx.constraintlayout.widget.ConstraintLayout>
android-seekbar android
1 Answers

From an inspection of the code, it is clear that VerticalSeekBar does not provide all the functionality of SeekBar.OnSeekBarChangeListener. Specifically, callbacks that mimic the functionaility of onStartTrackingTouch() and onStopTrackingTouch() are missing, although a progress change listener is supported.

You can, however, add this missing functionality by extending the VerticalSeekBar as follows:

class MyVerticalSeekBar(context: Context, attrs: AttributeSet) : VerticalSeekBar(context, attrs) {

    private var mChangeListener: OnVerticalSeekBarChangeListener? = null

    fun setOnVerticalSeekBarChangeListener(listener: OnVerticalSeekBarChangeListener?) {
        mChangeListener = listener
        // We will use the progress listener as defined in VerticalSeekBar.
        if (listener == null) {
            super.setOnProgressChangeListener(null)
        } else {
            super.setOnProgressChangeListener { newProgress ->
                listener.onProgressChanged(this, newProgress, true)
            }
        }
    }

    // Spy on touch events targeting the vertical seek bar to handle
    // onStartTrackingTouch() and onStopTrackingTouch()
    override fun onInterceptTouchEvent(ev: MotionEvent): Boolean {
        if (mChangeListener != null) {
            when (ev.actionMasked) {
                MotionEvent.ACTION_DOWN -> mChangeListener?.onStartTrackingTouch(this)
                MotionEvent.ACTION_UP,
                MotionEvent.ACTION_CANCEL -> mChangeListener?.onStopTrackingTouch(this)
            }
        }
        return super.onInterceptTouchEvent(ev)
    }

    interface OnVerticalSeekBarChangeListener {
        fun onProgressChanged(seekBar: MyVerticalSeekBar, progress: Int, fromUser: Boolean)
        fun onStartTrackingTouch(seekBar: MyVerticalSeekBar)
        fun onStopTrackingTouch(seekBar: MyVerticalSeekBar)
    }
}

An example using MyVerticalSeekBar based upon the sample app in the GitHub repository for VerticalSeekBar:

class MainActivity : AppCompatActivity() {

    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContentView(R.layout.activity_main)
        mainVerticalSeekBar.progress = 75

        mainVerticalSeekBar.setOnVerticalSeekBarChangeListener(
            object : MyVerticalSeekBar.OnVerticalSeekBarChangeListener {
                override fun onProgressChanged(
                    seekBar: MyVerticalSeekBar, progress: Int, fromUser: Boolean
                ) {
                    Log.d("MainActivity", "<<<<onProgressChanged (V)")
                    mainProgressValue.text = progress.toString()
                }

                override fun onStartTrackingTouch(seekBar: MyVerticalSeekBar) {
                    Log.d("MainActivity", "<<<<onStartTrackingTouch (V)")
                }

                override fun onStopTrackingTouch(seekBar: MyVerticalSeekBar) {
                    Log.d("MainActivity", "<<<<onStopTrackingTouch (V)")
                }
            }
        )

        mainProgressValue.text = mainVerticalSeekBar.progress.toString()

    }
}
user_62879100
Related