Imageadapter Cannot Be Applied To Fragment Class

I've followed the documentation on how to use GridView and had the same issue as this guy ImageAdapter cannot be applied to a Fragment Class The code in my Fragment Class is as fol

Solution 1:

You need to have a constructor in your ImageAdapter class which will take the context as a parameter.

And you have to set the background of the image based on the adapter position as well.

Here's the modified adapter class.

publicclassImageAdapterextendsBaseAdapter {

    private Context mcontext;

    publicImageAdapter(Context context) {
        mContext = context;
    }

    @OverridepublicintgetCount() {
        return mthumbids.length;
    }

    @Overridepublic Object getItem(int position) {
        returnnull;
    }

    @OverridepubliclonggetItemId(int position) {
        return0;
    }

    @Overridepublic View getView(int position, View convertView, ViewGroup parent) {
        ImageView imageView;
        if (convertView == null) {
            imageView = newImageView(mcontext);
            imageView.setLayoutParams(newGridView.LayoutParams(85, 85));
            imageView.setScaleType(ImageView.ScaleType.CENTER_CROP);
            imageView.setPadding(8, 8, 8, 8);

            // Add the following to load the image
            imageView.setBackground(ContextCompat.getDrawable(context, mthumbids[position]));
        }
        else  {
            imageView = (ImageView)convertView;
        }

        return imageView;
    }

    private Integer[] mthumbids =
            {
              R.drawable.img1, R.drawable.img2,
              R.drawable.img3, R.drawable.img4,
              R.drawable.img5, R.drawable.img6
            };
}

Solution 2:

You can also get the context from the parent in getView(). Then you don't have to pass and store the context. So your getView looks like this:

@Overridepublic View getView(int position, View convertView, ViewGroup parent) {
    ImageView imageView;
    if (convertView == null) {
        Contextcontext= parent.getContext(); // <-- add this line
        imageView = newImageView(context); // use the context from the parent
        imageView.setLayoutParams(newGridView.LayoutParams(85, 85));
        imageView.setScaleType(ImageView.ScaleType.CENTER_CROP);
        imageView.setPadding(8, 8, 8, 8);
    }
    else  {
        imageView = (ImageView)convertView;
    }

    return imageView;
}

Solution 3:

Missing constructor with argument context for ImageAdapter. Only empty constructor will be created automatically you should write constructors with specific argument values.

publicImageAdapter(Context context){

mContext = context; }

Solution 4:

Add this code in ImageAdapter class.

publicImageAdapter(Context context) {
    super();
    mContext = context;
}