Zoom Image

nisha · by **nisha** » Mon May 19, 2008 1:20 pm

Hi All,

I wanted to zoom a image.. It will work perfectly with views... i.e setBounds...

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Using java Syntax Highlighting

image.setBounds((getWidth()/2)-zoomControler, (getHeight()/2)-zoomControler, (getWidth()/2)+zoomControler, (getHeight()/2)+zoomControler); 
Parsed in 0.030 seconds,  using GeSHi 1.0.8.4

I wanted to know how to do the same in class which is extending activity??

regards,
nisha

saty_32016 · by **saty_32016** » Tue May 20, 2008 5:25 am

Hi Nisha,

I think you want this. if need any other help let me know..........

Cheers!!!!!!!!!

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Using java Syntax Highlighting

]
 
package Com.TechM.Image;
 
//code to Zoom the Image
 
import android.app.Activity;
 
import android.os.Bundle;
 
import android.content.Context; 
 
import android.graphics.Canvas; 
 
import android.graphics.drawable.Drawable; 
 
import android.view.KeyEvent; 
 
import android.view.View; 
 
public class Image extends Activity {
 
    /** Called when the activity is first created. */
 
    /* 
 
     * @see android.app.Activity#onCreate(android.os.Bundle)
 
     */
 
    @Override
 
    public void onCreate(Bundle icicle) {
 
        super.onCreate(icicle);
 
        setContentView( new Zoom(this));
 
    }
 
}
 
class Zoom extends View { 
 
     private Drawable image; 
 
     private int zoomControler=20; 
 
     public Zoom(Context context) 
 
     { 
 
          super(context); 
 
          image=context.getResources().getDrawable(R.drawable.gallery_background_1); 
 
          setFocusable(true); 
 
     } 
 
     @Override 
 
     protected void onDraw(Canvas canvas) { 
 
          // TODO Auto-generated method stub 
 
          super.onDraw(canvas); 
 
     //here u can control the width and height of the images........ this line is very important 
 
     image.setBounds((getWidth()/2)-zoomControler, (getHeight()/2)-zoomControler, (getWidth()/2)+zoomControler, (getHeight()/2)+zoomControler); 
 
          image.draw(canvas); 
 
     } 
 
     @Override 
 
     public boolean onKeyDown(int keyCode, KeyEvent event) { 
 
          if(keyCode==KeyEvent.KEYCODE_DPAD_UP)// zoom in 
 
               zoomControler+=10; 
 
          if(keyCode==KeyEvent.KEYCODE_DPAD_DOWN) // zoom out 
 
               zoomControler-=10; 
 
          if(zoomControler<10) 
 
               zoomControler=10; 
 
          invalidate(); 
 
          return true; 
 
     } 
 
} 
Parsed in 0.037 seconds,  using GeSHi 1.0.8.4

nisha · by **nisha** » Tue May 20, 2008 6:01 am

Hi,

Thanks for your reply.. You are taking image from res i.e drawable.. In my case i have to take image from server.. I used this code

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   ImageView imageView = new ImageView(this); 
 
            imageView.setImageDrawable(drawable1); 
 
            imageView.setAdjustViewBounds(true);
 
                    imageView.setPadding(10, 140, 10,200);
 
                   imageView.setLayoutParams(new LayoutParams(LayoutParams.FILL_PARENT, 
 
                   LayoutParams.FILL_PARENT)); 
 
         imageView.setScaleType(ScaleType.CENTER_CROP); 
 
Parsed in 0.035 seconds,  using GeSHi 1.0.8.4

Image is coming and it is zoomed also.. However image is not very clear... Is there any other way to do the same?

thanks and regards,
nisha

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