ImageView重新指定数据源的问题

	Tools.setGuidImage(this, R.id.r1, R.drawable.p1, "FirstLogin");

package com.example.navigatedemo;

import android.app.Activity;
import android.content.Context;
import android.content.SharedPreferences;
import android.content.res.Resources;
import android.util.Log;
import android.view.GestureDetector;
import android.view.Gravity;
import android.view.MotionEvent;
import android.view.View;
import android.view.View.OnGenericMotionListener;
import android.view.ViewGroup;
import android.view.ViewParent;
import android.widget.FrameLayout;
import android.widget.ImageView;
import android.widget.Toast;
import android.widget.ImageView.ScaleType;

public class Tools {
	public static int shownumber = 1;// 当前正在展示的图片下表

	static float mPosX = 0;
	static float mPosY = 0;
	static float mCurrentPosX = 0;
	static float mCurrentPosY = 0;

	/**
	 * 弹出相关的提示
	 * 
	 * @param context
	 * @param xmlSoruce
	 */
	public static void toastShow(Context context, String xmlSoruce) {
		Toast toast = null;

		toast = Toast.makeText(context, xmlSoruce, Toast.LENGTH_LONG);
		toast.setGravity(Gravity.CENTER, 0, 0);
		toast.show();
	}

	/**
	 * @author lianglin
	 * @param act
	 *            The Activity which invoke this function
	 * @param viewId
	 *            The view of the activity
	 * @param imageId
	 *            The guide image
	 * @param preferenceName
	 *            The sharePreference which save the flag whether first login in
	 * */
	public static void setGuidImage(final Activity act, int viewId,
			int imageId, String preferenceName) {
		@SuppressWarnings("static-access")
		SharedPreferences preferences = act.getSharedPreferences(
				preferenceName, act.MODE_PRIVATE);
		final SharedPreferences.Editor editor = preferences.edit();
		final String key = act.getClass().getName() + "_firstLogin";
		if (!preferences.contains(key)) {
			editor.putBoolean(key, true);
			editor.commit();
		}

		// 判断是否首次登陆
		/*
		 * if(!preferences.getBoolean(key, true)) return;
		 */

		View view = act.getWindow().getDecorView().findViewById(viewId);
		ViewParent viewParent = view.getParent();
		if (viewParent instanceof FrameLayout) {
			final FrameLayout frameLayout = (FrameLayout) viewParent;
			final ImageView guideImage = new ImageView(act.getApplication());
			FrameLayout.LayoutParams params = new FrameLayout.LayoutParams(
					ViewGroup.LayoutParams.MATCH_PARENT,
					ViewGroup.LayoutParams.MATCH_PARENT);
			guideImage.setLayoutParams(params);
			guideImage.setScaleType(ScaleType.FIT_XY);
			guideImage.setImageResource(imageId);
			/*
			 * guideImage.setOnClickListener(new View.OnClickListener() {
			 * 
			 * @Override public void onClick(View v) { switch(shownumber) { case
			 * 1: shownumber++; guideImage.setImageResource(R.drawable.p2);
			 * break; case 2: shownumber++;
			 * guideImage.setImageResource(R.drawable.p3); break; case 3:
			 * frameLayout.removeView(guideImage); editor.putBoolean(key,
			 * false); editor.commit(); break; }
			 * 
			 * 
			 * 
			 * } });
			 */
			// 设置图片的触碰事件
			guideImage.setOnTouchListener(new View.OnTouchListener() {

				@Override
				public boolean onTouch(View v, MotionEvent event) {
					switch (event.getAction()) {
					// 按下
					case MotionEvent.ACTION_DOWN:
						mPosX = event.getX();
						mPosY = event.getY();
						// toastShow(act.getApplicationContext(),
						// "按下按下按下按下按下按下mPosX:" + mPosX + "   mPosY:"
						// + mPosY);
						// Log.v("按下", "按下按下按下按下按下按下");
						// 移动
					case MotionEvent.ACTION_MOVE:
						mCurrentPosX = event.getX();
						mCurrentPosY = event.getY();
						// toastShow(act.getApplicationContext(),
						// "移动移动移动移动移动移动移动mCurrentPosX:"+mCurrentPosX+"    mCurrentPosY:"+mCurrentPosY);
						// Log.v("移动", "移动移动移动移动移动移动移动");
						break;

					// 拿起
					case MotionEvent.ACTION_UP:
						/*
						 * toastShow(act.getApplicationContext(),
						 * "拿起拿起拿起拿起拿起拿起mCurrentPosX:" + mCurrentPosX +
						 * "  mPosX:" + mPosX + "  mCurrentPosY:" + mCurrentPosY
						 * + "   mPosY:" + mPosY + "   mCurrentPosX - mPosX:" +
						 * (mCurrentPosX - mPosX) +
						 * "    Math.abs(mCurrentPosY - mPosY):" +
						 * Math.abs(mCurrentPosY - mPosY));
						 */
						// Log.v("拿起", "拿起拿起拿起拿起拿起拿起");

						// toastShow(act.getApplicationContext(),"Math.abs(mCurrentPosX - mPosX):"
						// +Math.abs(mCurrentPosX - mPosX)
						// +"     Math.abs(mCurrentPosY - mPosY):"+Math.abs(mCurrentPosY
						// - mPosY)
						// +"   \n mCurrentPosX:" + mCurrentPosX
						// + "  mPosX:" + mPosX
						// + "  mCurrentPosY:" + mCurrentPosY
						// + "   mPosY:" + mPosY);
						// x的值比y的值大，代表是横向x轴移动
						if ((int) Math.abs(mCurrentPosX - mPosX) > (int) Math
								.abs(mCurrentPosY - mPosY)) {
							// 如果拿起的点x值大于按下的点x值，代表向右滑动
							if (mCurrentPosX > mPosX) {
								switch (++shownumber) {
								case 2:
									guideImage.setImageResource(R.drawable.p2);
									guideImage.invalidate();
									break;
								case 3:
									guideImage.setImageResource(R.drawable.p3);
									guideImage.invalidate();
									break;
								case 4:
									shownumber = 1;
									guideImage.setImageResource(R.drawable.p1);
									guideImage.invalidate();
									/*
									 * frameLayout.removeView(guideImage);
									 * editor.putBoolean(key, false);
									 * editor.commit();
									 */
									break;
								}
							} else// 代表向左滑动
							{
								switch (--shownumber) {
								case 0:
								case 1:
									guideImage.setImageResource(R.drawable.p1);
									guideImage.invalidate();
									break;
								case 2:
									shownumber++;
									guideImage.setImageResource(R.drawable.p2);
									guideImage.invalidate();
									break;
								case 3:
									shownumber = 1;
									guideImage.setImageResource(R.drawable.p1);
									guideImage.invalidate();
									/*
									 * frameLayout.removeView(guideImage);
									 * editor.putBoolean(key, false);
									 * editor.commit();
									 */
									break;
								}
							}
						}
						// x的值比y的值小，代表是纵向y轴移动
						else {
							// 如果拿起的点y值大于按下的点y值，向下滑动
							if (mCurrentPosY > mPosY) {
								switch (++shownumber) {
								case 2:
									guideImage.setImageResource(R.drawable.p2);
									guideImage.invalidate();
									break;
								case 3:
									guideImage.setImageResource(R.drawable.p3);
									guideImage.invalidate();
									break;
								case 4:
									shownumber = 1;
									guideImage.setImageResource(R.drawable.p1);
									guideImage.invalidate();
									/*
									 * frameLayout.removeView(guideImage);
									 * editor.putBoolean(key, false);
									 * editor.commit();
									 */
									break;
								}
							} else// 代表向上滑动
							{
								switch (--shownumber) {
								case 0:
								case 1:
									guideImage.setImageResource(R.drawable.p1);
									guideImage.invalidate();
									break;
								case 2:
									shownumber++;
									guideImage.setImageResource(R.drawable.p2);
									guideImage.invalidate();
									break;
								case 3:
									shownumber = 1;
									guideImage.setImageResource(R.drawable.p1);
									guideImage.invalidate();
									/*
									 * frameLayout.removeView(guideImage);
									 * editor.putBoolean(key, false);
									 * editor.commit();
									 */
									break;
								}
							}

						}
						break;
					default:
						Log.v("default", "defaultdefaultdefaultdefaultdefault");
						break;
					}
					return true;
				}
			});

			frameLayout.addView(guideImage);// 添加引导图片

		}
	}
}