Cannot Resolve Constructor Arrayadapter When Using Listview In Android Studio

I have an activity Mainactivity, in this when a button is pressed then it will show a listview. But in listAdapter = new ArrayAdapter(this, android.R.l

Solution 1:

The error shows that you are putting android view.View.OnClickListener as the first argument.

I know you said you have tried, but you really need to use Mainactivity.this. If it is not working please post the code of the start of your java file.

Also is your activity named as Mainactivity? Remember it is case sensitive, should it be MainActivity? If so, you have to use MainActivity.this

Solution 2:

I think it's happening because your class implements onclicklistener. So can you try cast this to Activity? Like the code below:

listAdapter = new ArrayAdapter((Activity)this, android.R.layout.simple_list_item_1, android.R.id.text1, value);

Solution 3:

ArrayAdapter needs Context as the first argument. What you can do is to have a field reference to your Context, like the followings.

1. Added a field to your Activity, private Context mContext;
2. Inside the onCreate() of your Activity, mContext = this;
3. Use the mContext to construct ArrayAdapter, listAdapter = new ArrayAdapter(mContext, android.R.layout.simple_list_item_1, android.R.id.text1, value);

Solution 4:

Maybe this will help you:

listAdapter = newArrayAdapter(MainActivity.this,
                               android.R.layout.simple_list_item_1,
                               android.R.id.text1,
                               Collections.singletonList(value));