This is great, easily understandable. Thanks

weldrian wrote:zooming.java

Syntax: [ Download ] [ Hide ]

Syntax: [ Download ] [ Show ]

Using java Syntax Highlighting

1. import android.app.Activity;
2. import android.os.Bundle;
3.  
4. public class zooming extends Activity {
5.     /** Called when the activity is first created. */
6.     @Override
7.     public void onCreate(Bundle icicle) {
8.         super.onCreate(icicle);
9.         setContentView(new Zoom(this));
10.     }
11. }

Parsed in 0.031 seconds, using GeSHi 1.0.8.4

Zoom.java

Syntax: [ Download ] [ Hide ]

Syntax: [ Download ] [ Show ]

Using java Syntax Highlighting

1. import android.content.Context;
2. import android.graphics.Canvas;
3. import android.graphics.drawable.Drawable;
4. import android.view.KeyEvent;
5. import android.view.View;
6.  
7. public class Zoom extends View {
8.         private Drawable image;
9.         private int zoomControler=20;
10.         public Zoom(Context context)
11.         {
12.                 super(context);
13.                 image=context.getResources().getDrawable(R.drawable.icon);
14.                 setFocusable(true);
15.                
16.         }
17.         @Override
18.         protected void onDraw(Canvas canvas) {
19.                 // TODO Auto-generated method stub
20.                 super.onDraw(canvas);
21.         //here u can control the width and height of the images........ this line is very important
22.         image.setBounds((getWidth()/2)-zoomControler, (getHeight()/2)-zoomControler, (getWidth()/2)+zoomControler, (getHeight()/2)+zoomControler);
23.                 image.draw(canvas);
24.         }
25.         @Override
26.         public boolean onKeyDown(int keyCode, KeyEvent event) {
27.                
28.                 if(keyCode==KeyEvent.KEYCODE_DPAD_UP)// zoom in
29.                         zoomControler+=10;
30.                 if(keyCode==KeyEvent.KEYCODE_DPAD_DOWN) // zoom out
31.                         zoomControler-=10;
32.                 if(zoomControler<10)
33.                         zoomControler=10;
34.                
35.                 invalidate();
36.                 return true;
37.         }
38. }
39.  

Parsed in 0.034 seconds, using GeSHi 1.0.8.4

Him Thx for your instruction above, but im a very new developer, can you kindly explaint step by step?
Many thanks =)

another question is how can i upload the picure into the android app.

welldrian...make a new project..put these two (java) files in ur src folder...change the names according to eclipse suggestion if u get any error...the codes should walk straight way..it did for me..

venkat wrote:Hi ben, it is very easy to Zoom in and zoom out Images. take a look here
using UP and Down Arrow keys , u can zoom in and zoom out the images.


zooming.java

Syntax: [ Download ] [ Hide ]

Syntax: [ Download ] [ Show ]

Using java Syntax Highlighting

1. import android.app.Activity;
2. import android.os.Bundle;
3.  
4. public class zooming extends Activity {
5.     /** Called when the activity is first created. */
6.     @Override
7.     public void onCreate(Bundle icicle) {
8.         super.onCreate(icicle);
9.         setContentView(new Zoom(this));
10.     }
11. }

Parsed in 0.034 seconds, using GeSHi 1.0.8.4

Zoom.java

Syntax: [ Download ] [ Hide ]

Syntax: [ Download ] [ Show ]

Using java Syntax Highlighting

1. import android.content.Context;
2. import android.graphics.Canvas;
3. import android.graphics.drawable.Drawable;
4. import android.view.KeyEvent;
5. import android.view.View;
6.  
7. public class Zoom extends View {
8.         private Drawable image;
9.         private int zoomControler=20;
10.         public Zoom(Context context)
11.         {
12.                 super(context);
13.                 image=context.getResources().getDrawable(R.drawable.icon);
14.                 setFocusable(true);
15.                
16.         }
17.         @Override
18.         protected void onDraw(Canvas canvas) {
19.                 // TODO Auto-generated method stub
20.                 super.onDraw(canvas);
21.         //here u can control the width and height of the images........ this line is very important
22.         image.setBounds((getWidth()/2)-zoomControler, (getHeight()/2)-zoomControler, (getWidth()/2)+zoomControler, (getHeight()/2)+zoomControler);
23.                 image.draw(canvas);
24.         }
25.         @Override
26.         public boolean onKeyDown(int keyCode, KeyEvent event) {
27.                
28.                 if(keyCode==KeyEvent.KEYCODE_DPAD_UP)// zoom in
29.                         zoomControler+=10;
30.                 if(keyCode==KeyEvent.KEYCODE_DPAD_DOWN) // zoom out
31.                         zoomControler-=10;
32.                 if(zoomControler<10)
33.                         zoomControler=10;
34.                
35.                 invalidate();
36.                 return true;
37.         }
38. }
39.  

Parsed in 0.038 seconds, using GeSHi 1.0.8.4

regards,
venkat

nice tutorial venkat thx a lot..but i would like to drag and scroll the image..how to do it?

The code works fine with the emulator. But the problem is I cannot see any changes when i use the application on HTC desire. How do i use this in the phone???

How to Zoom image of ImageViewer.........plz help.......us.

hmm i dont get it it doesnt work for me i always get an unexpected error and it closed