Scroll A Big Image in ImageSwitcher

by nico » Thu Jan 10, 2008 6:50 am

Hi, all

need help, again I tried to view a big image in its real size (not fit to screen) using ImageSwitcher. I set the ScaleType of ImageView to ScaleType.CENTER. It worked but i cant scroll the image, how can i do it?I tried setHorizontalScrollBarEnabled and setVerticalScrollBarEnabled but still not working

This is the source:

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Using java Syntax Highlighting

1. package com.nico.imageSwitcherTest;
2.  
3.  
4.  
5. import java.net.URISyntaxException;
6.  
7.  
8.  
9. import com.nico.imageSwitcherTest.R;
10.  
11.  
12.  
13. import android.app.Activity;
14.  
15. import android.net.ContentURI;
16.  
17. import android.os.Bundle;
18.  
19. import android.view.View;
20.  
21. import android.view.ViewGroup.LayoutParams;
22.  
23. import android.widget.ImageSwitcher;
24.  
25. import android.widget.ImageView;
26.  
27. import android.widget.ViewSwitcher;
28.  
29. import android.widget.ImageView.ScaleType;
30.  
31.  
32.  
33. public class ImageSwitcherTest extends Activity implements ViewSwitcher.ViewFactory {
34.  
35.     private ImageSwitcher mSwitcher;
36.  
37.  
38.  
39.         /** Called when the activity is first created. */
40.  
41.     @Override
42.  
43.     public void onCreate(Bundle icicle) {
44.  
45.         super.onCreate(icicle);
46.  
47.         setContentView(R.layout.main);
48.  
49.        
50.  
51.         mSwitcher = (ImageSwitcher) findViewById(R.id.switcher);
52.  
53.                 mSwitcher.setFactory(this);
54.  
55.                
56.  
57.                 try {
58.  
59.                         mSwitcher.setImageURI(new ContentURI("/tmp/somebigsizepicture.png"));
60.  
61.                 } catch (URISyntaxException e) {
62.  
63.                         // TODO Auto-generated catch block
64.  
65.                         e.printStackTrace();
66.  
67.                 }
68.  
69.     }
70.  
71.    
72.  
73.     public View makeView() {
74.  
75.                 // TODO Auto-generated method stub
76.  
77.                 ImageView i = new ImageView(this);
78.  
79.                 i.setBackgroundColor(0xFF000000);
80.  
81.                 i.setLayoutParams(new LayoutParams(LayoutParams.FILL_PARENT,
82.  
83.                                 LayoutParams.FILL_PARENT));
84.  
85.                 i.setScaleType(ScaleType.CENTER);
86.  
87.                 return i;
88.  
89.         }
90.  
91. }

Parsed in 0.036 seconds, using GeSHi 1.0.8.4

And here is the screenshot: (i want to be able to scroll or pan the image so i can see the rest of image)

Attachments

device.png (7.12 KiB) Viewed 13069 times

by snowtiger » Thu Jan 10, 2008 11:30 am

by nico » Thu Jan 10, 2008 1:58 pm

Hi snowtiger,

the directions all wrong but it works, thx a lot Though there's something weird with ScaleType.CENTER, the image is cropped on the up and left border So when i scrolled it using your suggestion, it can reach the right and bottom border but not the up and left border. what's goin on here?

Actually i'm trying to zoom in and out the image viewed on ImageSwitcher. Any other suggestion to accomplish this?Thanksss..

Attachments

This is when i used ScaleType.CENTER then scroll all the way to right border

rightBorder.png (7.84 KiB) Viewed 13042 times

This is when i didnt use ScaleType.CENTER

fitScale.png (7.27 KiB) Viewed 13042 times

by nico » Fri Jan 11, 2008 5:01 am

still can't figure out the croped-border-when-using-StyleType.CENTER-problem, anyone knows how to solve it? but i found another solution for image gallery that can zoom in and out, i just used the WebView instead of ImageView