CODEWITHSUNDEEP
androidimageviewscreen-resolutionlayoutparams
u3l
u3l

Reputation: 3412

Setting ImageView size programmatically depending on resolution

I have an ImageView which I want to set the size of programmatically. So I don't have the option of putting different-sized images in their respective drawable folders.

Basically, instead of doing what I've done below, I want to set the LayoutParams according to the screen resolution. If the device is ldpi or mdpi, then 100,100... if it was hdpi, then 150,150 etc. How can I achieve this?

ImageVIew imageView = new ImageView(this);
imageView.setLayoutParams(new ViewGroup.LayoutParams(100, 100));
layout.add(imageView);

Upvotes: 1

Views: 4341

Answers (6)

Peter Blomsma
Peter Blomsma

Reputation: 11

To find out which densitity the device has, you can use:

DisplayMetrics metrics = new DisplayMetrics();
getWindowManager().getDefaultDisplay().getMetrics(metrics);
switch(metrics.densityDpi){
     case DisplayMetrics.DENSITY_LOW:
                break;
     case DisplayMetrics.DENSITY_MEDIUM:
                 break;
     case DisplayMetrics.DENSITY_HIGH:
                 break;
}

Upvotes: 1

sjain
sjain

Reputation: 23344

Use DisplayMetrics to get the device dpi value in pixels -

DisplayMetrics dm = new DisplayMetrics();

getActivity().getWindowManager().getDefaultDisplay().getMetrics(dm);

// Display device dpi value of Y in pixels
int screenDPIy = (int)dm.ydpi;

if (screenDPIy <= 180) 
{           
    ImageVIew imageView = new ImageView(this);
    imageView.setLayoutParams(new ViewGroup.LayoutParams(100, 100));
    layout.add(imageView);
}
else
{
    ImageVIew imageView = new ImageView(this);
    imageView.setLayoutParams(new ViewGroup.LayoutParams(150, 150));
    layout.add(imageView);

}

Upvotes: 1

0101100101
0101100101

Reputation: 5911

Use density independent pixels. Works programmatically using the strategy here: Converting pixels to dp

ImageView imageView = new ImageView(this);
int width = (int) TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP, 100, getResources().getDisplayMetrics());
int height= (int) TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP, 100, getResources().getDisplayMetrics());
imageView.setLayoutParams(new ViewGroup.LayoutParams(width, height));
layout.add(imageView);

Upvotes: 0

Kalpesh Lakhani
Kalpesh Lakhani

Reputation: 993

once i have used this:

 int density= getResources().getDisplayMetrics().densityDpi;

switch(density)
{
case DisplayMetrics.DENSITY_LOW:
Toast.makeText(context, "LDPI", Toast.LENGTH_SHORT).show();
break;
case DisplayMetrics.DENSITY_MEDIUM:
 Toast.makeText(context, "MDPI", Toast.LENGTH_SHORT).show();
break;
case DisplayMetrics.DENSITY_HIGH:
Toast.makeText(context, "HDPI", Toast.LENGTH_SHORT).show();
break;
case DisplayMetrics.DENSITY_XHIGH:
 Toast.makeText(context, "XHDPI", Toast.LENGTH_SHORT).show();
break;

}

Upvotes: 1

Giru Bhai
Giru Bhai

Reputation: 14398

You can use 

ImageVIew imageView = new ImageView(this);
int size = getImageSize();
imageView.setLayoutParams(new ViewGroup.LayoutParams(size , size ));
layout.add(imageView);

and your getImageSize function will be 

private int getImageSize(){
         int density= getResources().getDisplayMetrics().densityDpi;
         int size =100; 
         switch(density)
         {
         case DisplayMetrics.DENSITY_LOW:
             size = 100;
             break;
         case DisplayMetrics.DENSITY_MEDIUM:
             size = 100;
             break;
         case DisplayMetrics.DENSITY_HIGH:
             size = 150;
             break;
         }

         return size;
       }

where getImageSize return different size as per different density.

Upvotes: 5

Lazy
Lazy

Reputation: 1837

First get screen width, and multiply it with what you want. I multiplied with 0,2

DisplayMetrics displaymetrics = new DisplayMetrics();
                   getWindowManager().getDefaultDisplay().getMetrics(displaymetrics);
                   int screen_width = displaymetrics.widthPixels;
                   int icon_width = screen_width * 2 / 10;

Then 

ImageVIew imageView = new ImageView(this);
imageView.setLayoutParams(new ViewGroup.LayoutParams(icon_width, icon_width));
layout.add(imageView);

Upvotes: 1

Related Questions