How to check which current image resource is attached to ImageView in android xml?

Question

I want to check which image resource is attached to ImageView in xml, I am able to check that which image resource is attached to image view but my requirement is to how to check that the ImageView has the same resource which I have set into xml or not, based on that I need to perform some actions.Code always executes else part. Following is my code,

  if (regProfile.getDrawable() == getResources().getDrawable( R.drawable.ivpic)) 
    {
      Toast.makeText(_con, "Image is ivPic", Toast.LENGTH_LONG).show(); 
      // new RegisterAsyntaskNew().execute(); 
    } 
  else 
    {
     Toast.makeText(_con, "Image isn't ivPic", Toast.LENGTH_LONG).show(); 
     // new RegisterAsyntask().execute(); 
    }

Answer 1

Hi please have a try with this as follows

if (regProfile.getDrawable().getConstantState() == getResources().getDrawable( R.drawable.ivpic).getConstantState()) 
{
  Toast.makeText(_con, "Image is ivPic", Toast.LENGTH_LONG).show(); 
  // new RegisterAsyntaskNew().execute(); 
} 
else 
{
 Toast.makeText(_con, "Image isn't ivPic", Toast.LENGTH_LONG).show(); 
 // new RegisterAsyntask().execute(); 
}

please use .getConstantState() to compare

visit

http://developer.android.com/reference/android/graphics/drawable/Drawable.html

http://developer.android.com/reference/android/graphics/drawable/Drawable.ConstantState.html

EDIT:

.getResources().getDrawable(imageResource)

Is deprecated in API21, so I changed Jitesh Upadhyay's answer.

Here is the code:

@SuppressWarnings("deprecation")
@SuppressLint("NewApi")
public static boolean checkImageResource(Context ctx, ImageView imageView,
        int imageResource) {
    boolean result = false;

    if (ctx != null && imageView != null && imageView.getDrawable() != null) {
        ConstantState constantState;

        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
            constantState = ctx.getResources()
                    .getDrawable(imageResource, ctx.getTheme())
                    .getConstantState();
        } else {
            constantState = ctx.getResources().getDrawable(imageResource)
                    .getConstantState();
        }

        if (imageView.getDrawable().getConstantState() == constantState) {
            result = true;
        }
    }

    return result;
}

Answer 2

You can do something like following,

Set a tag either through xml or dynamically as per your requirement.

Through xml,

<ImageView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:id="@+id/imageview1" 
        android:background="@drawable/bg"
        android:tag="bg"/>

Dynamically,

ImageView imageView=(ImageView)findViewById(R.id.imageview1);
imageView.setTag("bg");

Use imageView.getTag() to retrieve image information.

String backgroundImageName = String.valueOf(imageView.getTag()); 

Edit:

if you are changing ImageView background frequently then,

imageView.setTag(R.drawable.drawablename);
imageView.setImageResource(R.drawable.drawablename);
String backgroundImageName = String.valueOf(imageView.getTag());

Now you can make your check.

if (backgroundImageName.equals("bg"))  // here "bg" is the tag that you set previously
    {
      Toast.makeText(_con, "Image is ivPic", Toast.LENGTH_LONG).show(); 
      // new RegisterAsyntaskNew().execute(); 
    } 
  else 
    {
     Toast.makeText(_con, "Image isn't ivPic", Toast.LENGTH_LONG).show(); 
     // new RegisterAsyntask().execute(); 
    }

Answer 3

Same solution in kotlin:

if (regProfile.drawable.constantState == ContextCompat.getDrawable(this, R.drawable.ivpic).constantState) 
   { 
       Toast.makeText(_con, "Image is ivPic", Toast.LENGTH_LONG).show(); 
       // new RegisterAsyntaskNew().execute(); 
   } 
else 
   {
       Toast.makeText(_con, "Image isn't ivPic", Toast.LENGTH_LONG).show(); 
       // new RegisterAsyntask().execute(); 
   }

Answer 4

I face same problem but i resolved in kotlin Android

override fun onClick(v: View?) {

    when (v!!.getId()) {

        R.id.exo_fullscreen_button -> {
            if (exo_fullscreen_icon.drawable.constantState == resources.getDrawable( R.drawable.exo_controls_fullscreen_enter).constantState) {
                Toast.makeText(activity, "Correct Image ", Toast.LENGTH_LONG).show();

            }else{
                Toast.makeText(activity, "wrong image", Toast.LENGTH_LONG).show();

            }
        }
    }

}

Answer 5

u can do like this. first u need to set tag property of imageview like this

 android:tag="ic_grade_grey_24dp"

if (viewHolder.imgfav.getTag().equals("ic_grade_grey_24dp"))  // here "bg" is the tag that you set previously
            {
                Toast.makeText(mContext, "ic_grade_black_24dp", Toast.LENGTH_LONG).show();
                // new RegisterAsyntaskNew().execute();
                viewHolder.imgfav.setImageResource(R.drawable.ic_grade_black_24dp);
                viewHolder.imgfav.setTag("ic_grade_black_24dp");
            }
            else
            {
                Toast.makeText(mContext, "Second", Toast.LENGTH_LONG).show();
                viewHolder.imgfav.setImageResource(R.drawable.ic_grade_grey_24dp);
                viewHolder.imgfav.setTag("ic_grade_grey_24dp");
            }

Answer 6

I already answered on the similar topic here: Get the ID of a drawable in ImageView. The approach is based on tagging a view with a specified resource id in the custom LayoutInflater. Whole process is automated by a simple library TagView.

As a result, you can compare two drawables just by their ids:

TagViewUtils.getTag(regProfile, ViewTag.IMAGEVIEW_SRC.id) == R.drawable.ivpic