Velocity tracker Demo : VelocityTracker « UI « Android

1. Android
2. UI
3. VelocityTracker

Velocity tracker Demo

   

package app.test;

import android.app.Activity;
import android.os.Bundle;
import android.util.Log;
import android.view.MotionEvent;
import android.view.VelocityTracker;

public class Test extends Activity {
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
    }
    private VelocityTracker vTracker = null;
    public boolean onTouchEvent(MotionEvent event) {
        int action = event.getAction();
        switch(action) {
            case MotionEvent.ACTION_DOWN:
                if(vTracker == null) {
                    vTracker = VelocityTracker.obtain();
                }
                else {
                    vTracker.clear();
                }
                vTracker.addMovement(event);
                break;
            case MotionEvent.ACTION_MOVE:
                vTracker.addMovement(event);
                vTracker.computeCurrentVelocity(1000);
                Log.v("", "X velocity is " + vTracker.getXVelocity() +" pixels per second");
                Log.v("", "Y velocity is " + vTracker.getYVelocity() +" pixels per second");
                break;
            case MotionEvent.ACTION_UP:
            case MotionEvent.ACTION_CANCEL:
                vTracker.recycle();
                break;
        }
        return true;
    }
}

   
    
    
  

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