GestureManager.java

package cm.android.util;

import android.annotation.TargetApi;
import android.content.Context;
import android.view.GestureDetector;
import android.view.GestureDetector.SimpleOnGestureListener;
import android.view.MotionEvent;
import android.view.View;
import android.view.View.OnTouchListener;

/**
 * 手势管理类
 */
public class GestureManager extends SimpleOnGestureListener implements
        OnTouchListener {

    private GestureDetector mGestureDetector;

    private OnGestureFlingListener mListener;

    @TargetApi(3)
    public GestureManager(Context context, OnGestureFlingListener listener) {
        mGestureDetector = new GestureDetector(context, this);
        mListener = listener;
    }

    /**
     * 注册touch监听
     */
    public void register(View view) {
        view.setLongClickable(true);
        view.setOnTouchListener(this);
    }

    /**
     * 去注册touch监听
     */
    public void unRegister(View view) {
        view.setOnTouchListener(null);
    }

    // @Override
    // public boolean onDown(MotionEvent arg0) {
    // return false;
    // }

    @Override
    public boolean onFling(MotionEvent e1, MotionEvent e2, float velocityX,
            float velocityY) {
        if (e1.getX() - e2.getX() > 50) {
            return mListener.onFling(OnGestureFlingListener.TYPE_LEFT);
        } else if (e1.getX() - e2.getX() < -50) {
            return mListener.onFling(OnGestureFlingListener.TYPE_RIGHT);
        } else if (e1.getY() - e2.getY() > 50) {
            return mListener.onFling(OnGestureFlingListener.TYPE_UP);
        } else if (e1.getY() - e2.getY() < -50) {
            return mListener.onFling(OnGestureFlingListener.TYPE_DOWN);
        }
        return false;
    }

    // @Override
    // public void onLongPress(MotionEvent e) {
    //
    // }
    //
    // @Override
    // public boolean onScroll(MotionEvent e1, MotionEvent e2, float distanceX,
    // float distanceY) {
    // return false;
    // }
    //
    // @Override
    // public void onShowPress(MotionEvent e) {
    //
    // }
    //
    // @Override
    // public boolean onSingleTapUp(MotionEvent e) {
    // return false;
    // }

    @Override
    public boolean onTouch(View view, MotionEvent event) {
        return mGestureDetector.onTouchEvent(event);
    }

    /**
     * 手势动作接口
     */
    public interface OnGestureFlingListener {

        /**
         * 向左滑动
         */
        public static final int TYPE_LEFT = 0x01;
        /**
         * 向右滑动
         */
        public static final int TYPE_RIGHT = TYPE_LEFT + 1;
        /**
         * 向上滑动
         */
        public static final int TYPE_UP = TYPE_LEFT + 2;
        /**
         * 向下滑动
         */
        public static final int TYPE_DOWN = TYPE_LEFT + 3;

        /**
         * 手势滑动时出发
         *
         * @param type 手势滑动类型
         */
        boolean onFling(int type);
    }

}