加入放大缩小功能

Question

我已经写了这个代码从网址加载多个图像，并在图像上刷卡效果.....但现在我需要放大&出手指传播的图像...我认为捏缩放...我无法实现缩放功能..也不知道在哪里放置的功能，或者我应该为此做一个类..请帮助....感谢和问候..

这是我的代码：

package com.conn; 

import android.R; 
import android.app.Activity; 
import android.graphics.Bitmap; 
import android.graphics.BitmapFactory; 
import android.os.Bundle; 
import android.util.Log; 
import android.view.GestureDetector; 
import android.view.GestureDetector.SimpleOnGestureListener; 
import android.view.MotionEvent; 
import android.view.View; 
import android.view.animation.Animation; 
import android.view.animation.AnimationUtils; 
import android.widget.ImageView; 
import android.widget.ViewFlipper; 

public class swipe_touch extends Activity { 
    private static final String LOGID = "CHECKTHISOUT"; 

    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; 
    private GestureDetector gestureDetector; 
    View.OnTouchListener gestureListener; 

    private Animation slideLeftIn; 
    private Animation slideLeftOut; 
    private Animation slideRightIn; 
    private Animation slideRightOut; 
    private ViewFlipper viewFlipper; 
    int i; 
    ImageView[] img = new ImageView[24]; 

    String message = "Initial Message"; 
    /** Called when the activity is first created. */ 
    @Override 
    public void onCreate(Bundle savedInstanceState) { 
     super.onCreate(savedInstanceState); 
//  setContentView(R.layout.main); 
     //Set up viewflipper 
     try 
     { 
     viewFlipper = new ViewFlipper(this); 
     for(i=1;i<=3;i++) 
     { 
     Log.i("for","loop"); 
     j_comm_func funs = new j_comm_func(); 
     BitmapFactory.Options bmOptions; 
     bmOptions = new BitmapFactory.Options(); 
     bmOptions.inSampleSize = 1; 
     Bitmap bm = funs.LoadImage("http://65.175.77.34/newsnow/2462011/largest3/2462011-md-hr-"+i+".jpg", bmOptions); 
     img[i] = new ImageView(this); 
     img[i].setImageBitmap(bm); 
     viewFlipper.addView(img[i]); 

     } 
     } 
     catch(Exception e) 
     { 
      Log.i("error",e.getMessage()); 
     } 


     //set up animations 
     slideLeftIn = AnimationUtils.loadAnimation(this, R.anim.slide_out_right); 
     slideLeftOut = AnimationUtils.loadAnimation(this, R.anim.slide_in_left); 
     slideRightIn = AnimationUtils.loadAnimation(this, R.anim.slide_in_left); 
     slideRightOut = AnimationUtils.loadAnimation(this, R.anim.slide_out_right); 


     //put up a brownie as a starter 
     setContentView(viewFlipper); 

     gestureDetector = new GestureDetector(new MyGestureDetector()); 
    } 

    public class MyGestureDetector extends SimpleOnGestureListener { 
     @Override 
     public boolean onFling(MotionEvent e1, MotionEvent e2, float velocityX, float velocityY) { 
      try { 
       if (Math.abs(e1.getY() - e2.getY()) > SWIPE_MAX_OFF_PATH) 
        return false; 
       // right to left swipe 
       if(e1.getX() - e2.getX() > SWIPE_MIN_DISTANCE && Math.abs(velocityX) > SWIPE_THRESHOLD_VELOCITY) { 
        Log.v(LOGID,"right to left swipe detected"); 
        viewFlipper.setInAnimation(slideLeftIn); 
        viewFlipper.setOutAnimation(slideLeftOut); 
        viewFlipper.showNext(); 
        setContentView(viewFlipper); 

       } // left to right swipe 
       else if (e2.getX() - e1.getX() > SWIPE_MIN_DISTANCE && Math.abs(velocityX) > SWIPE_THRESHOLD_VELOCITY) { 
        Log.v(LOGID,"left to right swipe detected");      
        viewFlipper.setInAnimation(slideRightIn); 
        viewFlipper.setOutAnimation(slideRightOut); 
        viewFlipper.showPrevious(); 
        setContentView(viewFlipper); 

       } 
      } catch (Exception e) { 
       // nothing 
      } 
      return false; 
     } 
    } 



    // This doesn't work 
    @Override 
    public boolean onTouchEvent(MotionEvent event) { 
     if (gestureDetector.onTouchEvent(event)){ 
      Log.v(LOGID,"screen touched"); 
      return true; 
     } 
     else{ 
      return false; 
     } 
    } 
} 

Answer 1

加载一个网页视图，它具有捏放大内置功能的图像