protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.id.activity_main);
}
工程是我copy的,结果一直提示:R cannot be resolved to a variable
这是什么原因?
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.id.activity_main);
}
工程是我copy的,结果一直提示:R cannot be resolved to a variable
这是什么原因?