Android Studio 2.1, Java V8 Update 91, Gradle 2.1.0 .
I know that this questions has been asked many times here, but none of the recommendation solutions works out.
In a sudden after compiling ready to run on Emulator, my IDE give an error at the R.id attribute. Every Java files suddenly give the same error even I don't make any changes to the file.
I tried to make a new project, see if things different but the error keep coming. In my mind it could be internal error, again. Even I just update my IDE just now.
The Java file;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_science);
list_View = (ListView) findViewById(R.id.maintable);
String[] Days = new String[] { "Sunday", "Monday", "Tuesday", "Wednesday","Thursday", "Friday", "Saturday"};
dayList.addAll(Arrays.asList(Days));
adapter = new ArrayAdapter<>(this, android.R.layout.simple_list_item_1, dayList);
list_View.setAdapter(adapter);
NfcAdapter nfc = NfcAdapter.getDefaultAdapter(this);
if (nfc.isEnabled()) {
adapter = new ArrayAdapter<>(this, android.R.layout.simple_list_item_1, dayList);
Toast.makeText(this, "NFC turned ON", Toast.LENGTH_SHORT).show();
}
else {
Toast.makeText(this, "Please turn On NFC", Toast.LENGTH_SHORT).show();
}
}
The R
is the error.
XML file that associate to the Java;
<ListView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:id="@+id/maintable"
>
</ListView>
Is this, again, an internal error?