请大家帮忙看看这个滑动手势代码的问题

Helldance 2011-11-18 01:50:53

大家好，

我是参考网上比较广的code shogun的代码，但是运行总是有问题，请知道的指点啊

11-18 13:54:21.311: E/AndroidRuntime(12959): java.lang.StackOverflowError
11-18 13:54:21.311: E/AndroidRuntime(12959): at com.stee.android.SwipeDemo$1.onTouchEvent(SwipeDemo.java:57)
11-18 13:54:21.311: E/AndroidRuntime(12959): at com.stee.android.SwipeDemo$1.onTouchEvent(SwipeDemo.java:57)
11-18 13:54:21.311: E/AndroidRuntime(12959): at com.stee.android.SwipeDemo$1.onTouchEvent(SwipeDemo.java:57)
11-18 13:54:21.311: E/AndroidRuntime(12959): at com.stee.android.SwipeDemo$1.onTouchEvent(SwipeDemo.java:57)

/**

 * 

 */

package com.stee.android;



import android.app.Activity;

import android.content.Context;

import android.os.Bundle;

import android.util.Log;

import android.view.GestureDetector;

import android.view.MotionEvent;

import android.view.GestureDetector.SimpleOnGestureListener;

import android.view.View;

import android.widget.TextView;

import android.widget.Toast;



/**

 * @author Administrator

 * 

 */

public class SwipeDemo extends Activity implements View.OnTouchListener{

	GestureDetector gestureDetector;

	MyGestureDetectorListener lsnr;

	Context ctx;



	public void onCreate(Bundle savedInstanceState) {

		super.onCreate(savedInstanceState);

		

		setContentView(R.layout.main);

		

		View v = findViewById(android.R.id.content);

		

		ctx = this.getApplicationContext();



		lsnr = new MyGestureDetectorListener();

		

		v.setOnTouchListener(this);

	

		gestureDetector = new GestureDetector(ctx, lsnr) {

			@Override

			public boolean onTouchEvent(MotionEvent event) {

				if (gestureDetector.onTouchEvent(event))

					return true;

				else

					return false;

			}

		};

	}

	



	@Override

	public boolean onTouch(View v, MotionEvent event) {

		// TODO Auto-generated method stub

		return gestureDetector.onTouchEvent(event);

	}



	private class MyGestureDetectorListener extends SimpleOnGestureListener {

		

		@Override

		public boolean onDown (MotionEvent e){

			Log.i("", "ondown");

			return true;

		}



		@Override

		public boolean onFling(MotionEvent e1, MotionEvent e2, float velocityX,

				float velocityY) {

			if (e1.getX() - e2.getX() > SWIPE_MIN_DISTANCE

					&& Math.abs(velocityX) > SWIPE_THRESHOLD_VELOCITY) {

				Toast.makeText(ctx, "swipe left", Toast.LENGTH_SHORT).show();



			} else if (e2.getX() - e1.getX() > SWIPE_MIN_DISTANCE

					&& Math.abs(velocityX) > SWIPE_THRESHOLD_VELOCITY) {

				Toast.makeText(ctx, "swipe right", Toast.LENGTH_SHORT).show();

			}



			return true;

		}



		private static final int SWIPE_MIN_DISTANCE = 120;

		private static final int SWIPE_MAX_OFF_PATH = 250;

		private static final int SWIPE_THRESHOLD_VELOCITY = 200;

	}



}