OnTouchListener ACTION_MOVE is not working while moving finger on the screen

Here is what I want:

1. Touch the screen.
2. keep moving your finger.
3. If you touch any buttons on the screen while moving your finger, the color of the button changes its color to green.

Issue: The 'if' condition not working on its way in the 57th row (.java)

if (motionEvent.getAction() == MotionEvent.ACTION_MOVE) until it changes to if (motionEvent.getAction() == MotionEvent.ACTION_DOWN) which is I don't want.

Please, take a look to .java file below:

public class MainActivity extends AppCompatActivity implements View.OnTouchListener , GestureDetector.OnGestureListener{

    private Button bt1,bt2,bt3
    
    private GestureDetector mGestureDetector;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        
        
        // ------ buttons findViewByID
      
            bt1 = (Button) findViewById(R.id.b1);
            bt2 = (Button) findViewById(R.id.b2);
            bt3 = (Button) findViewById(R.id.b3);  
       

        //------Set UP id for buttons    

            bt1.setId(1);
            bt2.setId(2);
            bt3.setId(3);
        
       //-------set up touchlisteners for buttons
        
            bt1.setOnTouchListener(this);
            bt2.setOnTouchListener(this);
            bt3.setOnTouchListener(this);
    
        //
        mGestureDetector = new GestureDetector(this,this);

    }
    //---------Override Event
    @Override
    public boolean onTouch(View view, MotionEvent motionEvent) {
    
       /*----------When finger  touched + finger is moving. But the  condition below is not working  finger moving event (ACTION_MOVE) not working. but finger touch event(ACTION_DOWN) is working*/
        if (motionEvent.getAction() == MotionEvent.ACTION_MOVE)   // condition doesn't work until it changes                                //if(motionEvent.getAction() == MotionEvent.ACTION_DOWN).
        {
                switch (view.getId())
                    {
                    case 1:
                        bt1.setBackgroundColor(GREEN);
                        break;
                    case 2:
                        bt2.setBackgroundColor(GREEN);
                        break;
                    case 3:
                        bt3.setBackgroundColor(GREEN);
                        break;
                    }
                            
        }

            return true;
                }
//--------Other Overrides
    @Override
    public boolean onDown(MotionEvent motionEvent) {
        return false;
    }

    @Override
    public void onShowPress(MotionEvent motionEvent) {

    }

    @Override
    public boolean onSingleTapUp(MotionEvent motionEvent) {
        return false;
    }

    @Override
    public boolean onScroll(MotionEvent motionEvent, MotionEvent motionEvent1, float v, float v1) {

        return false;
    }

    @Override
    public void onLongPress(MotionEvent motionEvent) {

    }

    @Override
    public boolean onFling(MotionEvent motionEvent, MotionEvent motionEvent1, float v, float v1) {
        return false;
    }

 
 
 }

And please, take a look to the .XML file below

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
        xmlns:android="http://schemas.android.com/apk/res/android"
        xmlns:tools="http://schemas.android.com/tools"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:orientation="vertical"
        android:id="@+id/lin"

        tools:context=".MainActivity">
        
        //------Mode: HORIZONTAL
    <LinearLayout
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:orientation="horizontal">
            // ------ BUTTONS
        <Button
                android:id="@+id/b1"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:textSize="60sp"
                android:layout_weight="1"/>
        <Button
                android:id="@+id/b2"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:textSize="60sp"
                android:layout_weight="1" />
        <Button
                android:id="@+id/b3"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:textSize="60sp"
                android:layout_weight="1"/>
    </LinearLayout>
    
</LinearLayout>