无法在方法括号内传入新List？TextView批量隐藏方法调用报错求助

Got it, let's break down what's going on here and fix that error, plus make your code even cleaner as you wanted.

Why You're Seeing That Error #

The core issue is that List is an interface in Java—you can't directly instantiate it with new List<>(). Interfaces define a contract but don't have concrete implementation code, so you need to use one of its concrete subclasses (like ArrayList) or a utility method that creates a valid List instance for you.

Correct Ways to Call Your Method #

Here are a few valid ways to pass a List of TextViews directly in the method call:

Option 1: Use Arrays.asList() (Quick & Simple) #

This creates a fixed-size List from your TextView instances—perfect if you don't need to modify the list later:

makeTextViewsInvisible(Arrays.asList(textView1, textView2, textView3));

Option 2: Use ArrayList (For Modifiable Lists) #

If you might need to add/remove items from the list later, wrap the Arrays.asList() result in an ArrayList:

makeTextViewsInvisible(new ArrayList<>(Arrays.asList(textView1, textView2, textView3)));

Option 3: Java 9+? Use List.of() #

Java 9 introduced a more concise way to create immutable lists:

makeTextViewsInvisible(List.of(textView1, textView2, textView3));

Simplify Your makeTextViewsInvisible Method Even More #

Since your goal is to simplify code, let's trim that method down to be more readable and concise:

Enhanced For Loop (Clean & Readable) #

Replace the while loop with an enhanced for loop—no need to track an index variable:

private void makeTextViewsInvisible(List<TextView> listOfTextViews) {
    for (TextView textView : listOfTextViews) {
        textView.setVisibility(View.INVISIBLE);
    }
}

Java 8+ Stream API (One-Liner Magic) #

If you're using Java 8 or later, you can use forEach() to turn the method body into a single line:

private void makeTextViewsInvisible(List<TextView> listOfTextViews) {
    listOfTextViews.forEach(tv -> tv.setVisibility(View.INVISIBLE));
}

Skip the Method Entirely (Ultra-Simplified) #

If you don't need to reuse this logic elsewhere, you can even combine the list creation and visibility setup into one line directly where you need it:

Arrays.asList(textView1, textView2, textView3).forEach(tv -> tv.setVisibility(View.INVISIBLE));

Quick Test Class Tip #

When writing your test class, make sure you're initializing valid TextView instances to avoid null pointer exceptions. For example, in unit tests you can mock them:

@Test
void testMakeTextViewsInvisible() {
    TextView tv1 = Mockito.mock(TextView.class);
    TextView tv2 = Mockito.mock(TextView.class);
    
    makeTextViewsInvisible(Arrays.asList(tv1, tv2));
    
    Mockito.verify(tv1).setVisibility(View.INVISIBLE);
    Mockito.verify(tv2).setVisibility(View.INVISIBLE);
}

内容的提问来源于stack exchange，提问作者CodingM