How to set image programmatically to an ImageView inside an adapter using String value?

Question

As mentioned in the title, I have a RecyclerView inside which I need to populate 20 images. Since the images are available in drawable I am trying to programmatically set these images from the adapter of RecyclerView.

    @Override
    public void onBindViewHolder(HomeTeamViewHolder homeTeamViewHolder, int i)
    {

        homeTeamViewHolder.teamName.setText(d1.teams.get(i));
        String str = "R.drawable.e0";

        homeTeamViewHolder.home_teams.setImageDrawable(ContextCompat.getDrawable(homeTeamViewHolder.mcontext,str));

    }

Now, this obviously doesn't work as Android studio says:

Wrong 2nd argument type. Found: 'java.lang.String', required: 'int'

For which, a solution already exists: Setting Android images from string value

However, when I tried:

    int resourceId = Activity.getResources().getIdentifier("testimage", "drawable", "your.package.name");

inside onBindViewHolder() :

 @Override
public void onBindViewHolder(HomeTeamViewHolder homeTeamViewHolder, int i)
{

    homeTeamViewHolder.teamName.setText(d1.teams.get(i));
    //String str = "R.drawable.e0";
    int resourceId = Activity.getResources().getIdentifier("testimage", "drawable", "your.package.name");
    homeTeamViewHolder.home_teams.setImageDrawable(ContextCompat.getDrawable(homeTeamViewHolder.mcontext,resourceId));

}

Android Studio says:

Non-static method getResources() cannot be referenced from a static context

So, the question is: how to fix this?

you need context or activity instance to use getRestources() method. Or simply try to call getApplicationContext().getResources() if your adapter in activity — squalle0nhart
– squalle0nhart, Commented Nov 25, 2016 at 8:31
int imageId = getResources().getIdentifier("image_name", "drawable", getPackageName()); imageView.setImageDrawable(ContextCompat.getDrawable(context, iStopImageId)); — Kintan Patel
– Kintan Patel, Commented Nov 25, 2016 at 8:33
instead of using String str = "R.drawable.e0"; use int img=R.drawable.e0 — vimal raj
– vimal raj, Commented Nov 25, 2016 at 8:33
@Kintanpatel There is no issue with context, the problem is only at getResources() — OBX
– OBX, Commented Nov 25, 2016 at 8:35
@Daryl That doesn't sound feasible, as I have e0,e1,.......e20 images — OBX
– OBX, Commented Nov 25, 2016 at 8:36

adalpari · Accepted Answer · 2016-11-25 09:08:41Z

1

You can pass the context to the Adapter in constructor. Then you can access to getResources() through that context.

public class MyAdapter extends RecyclerView.Adapter<MyHolder> {

    ...

    private Context context;

    public MyAdapter(Context context, Other_arguments_you_need) {
        this.context = context;
        // set other arguments
    }

    ...

    @Override
    public void onBindViewHolder(HomeTeamViewHolder homeTeamViewHolder, int i)
    {

        homeTeamViewHolder.teamName.setText(d1.teams.get(i));
        int resourceId = context.getResources().getIdentifier("testimage", "drawable", "your.package.name");
        homeTeamViewHolder.home_teams.setImageDrawable(ContextCompat.getDrawable(homeTeamViewHolder.mcontext,resourceId));

    }
}

edited Nov 25, 2016 at 9:08

answered Nov 25, 2016 at 9:03

adalpari

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Comments

OBX · Accepted Answer · 2016-11-25 08:44:24Z

0

Fixed it by passing context to the Adapter.

 Context mcontext = itemView.getContext();

then, inside onBindViewHolder() :

@Override
public void onBindViewHolder(HomeTeamViewHolder homeTeamViewHolder, int i)
{

    homeTeamViewHolder.teamName.setText(d1.teams.get(i));
    String x = "e"+i;
    int resourceId = homeTeamViewHolder.mcontext.getResources().getIdentifier(x, "drawable", "com.udacity.yaafl");
    homeTeamViewHolder.home_teams.setImageDrawable(ContextCompat.getDrawable(homeTeamViewHolder.mcontext,resourceId));

}

answered Nov 25, 2016 at 8:44

OBX

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Comments

Ovi · Accepted Answer · 2016-11-25 09:18:33Z

0

grab the Integer ID of a resource by this

  int resourceId = homeTeamViewHolder.itemView.getResources().getIdentifier("testimage", "drawable", "your.package.name");

edited Nov 25, 2016 at 9:18

Ovi

3623 silver badges18 bronze badges

answered Nov 25, 2016 at 8:45

kagami

11 bronze badge

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