package com.leu.gesturedetectordemo;

import android.os.Bundle;
import android.support.v7.app.ActionBarActivity;
import android.util.Log;
import android.view.GestureDetector;
import android.view.MotionEvent;
import android.view.View;
import android.widget.ImageView;
import android.widget.Toast;


public class MainActivity extends ActionBarActivity {
    ImageView img;
    GestureDetector myGestureDetector;
    class myGestureListener extends GestureDetector.SimpleOnGestureListener{
        @Override
        
        public boolean onFling(MotionEvent e1, MotionEvent e2, float velocityX, float velocityY) {
            if (e1.getX()-e2.getX()>50){
                Log.d("img","right to left");
                Toast.makeText(MainActivity.this,"right to left",Toast.LENGTH_LONG).show();

            }else if (e2.getX()-e1.getX()>50){
                Toast.makeText(MainActivity.this,"left to right",Toast.LENGTH_LONG).show();
                Log.d("img","left to right");
            }


            return super.onFling(e1, e2, velocityX, velocityY);

        }
    }
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        img= (ImageView) findViewById(R.id.img);
        myGestureDetector =new GestureDetector(new myGestureListener());
        img.setOnTouchListener(new View.OnTouchListener() {
            @Override//可以捕获到触摸屏幕发生的event事件
            public boolean onTouch(View v, MotionEvent event) {
                //转发MotionEvent对象到OnGestureListener
                myGestureDetector.onTouchEvent(event);
                return true;
            }
        });
    }


}