我知道我的问题究竟在哪里,我只是不知道如何解决它。我正在尝试更改TextView的值,并且使用我的代码,应用程序崩溃,我在标题中收到错误。
我的代码:
@Override
protected void onStart() {
super.onStart();
if(authenticate() == true) {
displayUserDetails();
} else {
startActivity(new Intent(MainActivity.this, Login.class));
}
}
private boolean authenticate() {
return userLocalStore.getUserStatus();
}
private void displayUserDetails() {
User user = userLocalStore.getLoggedInUser();
final TextView userName = (TextView) findViewById(R.id.userName);
userName.setText(user.name);
final TextView userEmail = (TextView) findViewById(R.id.userEmail);
userEmail.setText(user.email);
}
你有我的代码片段,如果你需要全班,我很乐意提供。先感谢您。
更新:
问题是内容视图,因为它被设置为activity_main,因为我无法切换到另一个,我只是这样做:
private void displayUserDetails() {
User user = userLocalStore.getLoggedInUser();
NavigationView navigationView = (NavigationView) findViewById(R.id.nav_view);
navigationView.setNavigationItemSelectedListener(this);
View header=navigationView.getHeaderView(0);
final TextView userName = (TextView) header.findViewById(R.id.userName);
userName.setText(user.name);
final TextView userEmail = (TextView) header.findViewById(R.id.userEmail);
userEmail.setText(user.email);
}