SeekBar.java has error

Question

I have this SeekBar.java :

package android.widget;

import android.content.Context;
import android.util.AttributeSet;
public class SeekBar extends AbsSeekBar {
public interface OnSeekBarChangeListener {
  void onProgressChanged(SeekBar seekBar, int progress, boolean fromUser);


        void onStartTrackingTouch(SeekBar seekBar);


        void onStopTrackingTouch(SeekBar seekBar);


  private OnSeekBarChangeListener mOnSeekBarChangeListener;

    public SeekBar(Context context) {
        this(context, null);
    }

    public SeekBar(Context context, AttributeSet attrs) {
        this(context, attrs, com.android.internal.R.attr.seekBarStyle);
    }

    public SeekBar(Context context, AttributeSet attrs, int defStyleAttr) {
        this(context, attrs, defStyleAttr, 0);
    }

    public SeekBar(Context context, AttributeSet attrs, int defStyleAttr, int defStyleRes) {
        super(context, attrs, defStyleAttr, defStyleRes);
    }

    @Override
    void onProgressRefresh(float scale, boolean fromUser, int progress) {
        super.onProgressRefresh(scale, fromUser, progress);

        if (mOnSeekBarChangeListener != null) {
            mOnSeekBarChangeListener.onProgressChanged(this, progress, fromUser);
        }
    }


    public void setOnSeekBarChangeListener(OnSeekBarChangeListener l) {
        mOnSeekBarChangeListener = l;
    }

    @Override
    void onStartTrackingTouch() {
        super.onStartTrackingTouch();
        if (mOnSeekBarChangeListener != null) {
            mOnSeekBarChangeListener.onStartTrackingTouch(this);
        }
    }

    @Override
    void onStopTrackingTouch() {
        super.onStopTrackingTouch();
        if (mOnSeekBarChangeListener != null) {
            mOnSeekBarChangeListener.onStopTrackingTouch(this);
        }
    }

    @Override
    public CharSequence getAccessibilityClassName() {
        return SeekBar.class.getName();
    }
}

The Override lines in onProgressRefresh, onStartTrackingTouch, onStopTrackingTouch give this error :

Method does not override from its super class.

And this problem causes another error in my code, how can I fix this? Thanks.

Answer 1

SeekBar extends AbsSeekBar

AbsSeekBar doesn't have a method named onProgressRefresh yet you are using the override annotation.
The onProgressRefresh is in OnSeekBarChangeListener interface.
I am guessing you forgot to write implents.

SeekBar extends AbsSeekBar implements OnSeekBarChangeListener