how to fix Constant expression required in Android Studio | How to Fix switch case Error | 2024

#java
It seems like you are trying to use a switch statement in Android code, and you're encountering an error related to a constant expression. In Java, the expressions inside a case statement in a switch block must be constant at compile time. In this context, item.getItemId() is likely not considered a constant expression.
If you want to use if-else statements instead, you can modify your code like this:
java
Copy code
int itemId = item.getItemId();
if (itemId == R.id.nav_scan) {
mViewPager.setCurrentItem(0, true);
} else if (itemId == R.id.nav_generate) {
mViewPager.setCurrentItem(1, true);
} else if (itemId == R.id.nav_history) {
mViewPager.setCurrentItem(2, true);
}
This way, you can achieve the same functionality as the switch statement but with if-else conditions, which are more flexible in handling non-constant expressions.
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