No need to cast the result of findViewById?

Starting with API 26, findViewById uses inference for its return type, so you no longer have to cast.

Old definition:

View findViewById(int id)

New definition:

<T extends View> T findViewById(int id)

So if your compileSdk is at least 26, it means that you can make use of this :)

android casting findviewbyid

According to this article:

The following function relies on Java’s generics automatic type inference in order to eliminate a need for manual casting:

protected <T extends View> T findViewById(@IdRes int id) {    return (T) getRootView().findViewById(id);}

android casting findviewbyid

In older versions:

AutoCompleteTextView name = (AutoCompleteTextView) findViewById(R.id.autoCompleteTextView);

From Android Studio 3.0 with SDK 26:

AutoCompleteTextView name = findViewById(R.id.autoCompleteTextView);

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