我正在创建一个Android应用。它包含两个活动。一个用于登录，另一个用于注册。它们都在不同的标签中，我可以通过滑动在它们之间切换。
但是如果需要登录，两个标签底部都有一个按钮。我需要在单击按钮时移动到注册选项卡，还有另一个按钮返回登录选项卡。
如何使用onclick侦听器事件实现它？
public static class PlaceholderFragment extends Fragment {
/**
* The fragment argument representing the section number for this
* fragment.
*/
private static final String ARG_SECTION_NUMBER = "section_number";
public PlaceholderFragment() {
}
private static final String lTAG = RegisterActivity.class.getSimpleName();
private Button btnLogin;
private Button btnLinkToRegister;
private EditText linputEmail;
private EditText linputPassword;
private ProgressDialog lpDialog;
private SessionManager lsession;
private SQLiteHandler ldb;
private static final String rTAG = RegisterActivity.class.getSimpleName();
private Button btnRegister;
private Button btnLinkToLogin;
private EditText rinputFullName;
private EditText rinputEmail;
private EditText rinputPassword;
private ProgressDialog rpDialog;
private SessionManager rsession;
private SQLiteHandler rdb;
public static Context context;
/**
* Returns a new instance of this fragment for the given section
* number.
*/
public static PlaceholderFragment newInstance(int sectionNumber) {
PlaceholderFragment fragment = new PlaceholderFragment();
Bundle args = new Bundle();
args.putInt(ARG_SECTION_NUMBER, sectionNumber);
fragment.setArguments(args);
return fragment;
}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
if(getArguments().getInt(ARG_SECTION_NUMBER)==1) {
View rootView = inflater.inflate(R.layout.activity_login, container, false);
linputEmail = (EditText) rootView.findViewById(R.id.email);
linputPassword = (EditText) rootView.findViewById(R.id.password);
btnLogin = (Button) rootView.findViewById(R.id.btnLogin);
btnLinkToRegister = (Button) rootView.findViewById(R.id.btnLinkToRegisterScreen);
// Progress dialog
lpDialog = new ProgressDialog(getActivity());
lpDialog.setCancelable(false);
// SQLite database handler
context=getContext();
ldb = new SQLiteHandler(context);
// Session manager
lsession = new SessionManager(context);
// Check if user is already logged in or not
if (lsession.isLoggedIn()) {
// User is already logged in. Take him to main activity
Intent intent = new Intent(context, MainActivity.class);
startActivity(intent);
getActivity().finish();
}
// Login button Click Event
btnLogin.setOnClickListener(new View.OnClickListener() {
public void onClick(View view) {
String email = linputEmail.getText().toString().trim();
String password = linputPassword.getText().toString().trim();
// Check for empty data in the form
if (!email.isEmpty() && !password.isEmpty()) {
// login user
checkLogin(email, password);
} else {
// Prompt user to enter credentials
Toast.makeText(context,
"Please enter the credentials!", Toast.LENGTH_LONG)
.show();
}
}
});
// Link to Register Screen
btnLinkToRegister.setOnClickListener(new View.OnClickListener() {
public void onClick(View view) {
Intent i = new Intent(context,
RegisterActivity.class);
startActivity(i);
getActivity().finish();
}
});
return rootView;
}
else if (getArguments().getInt(ARG_SECTION_NUMBER)==2){
View rootView = inflater.inflate(R.layout.activity_register, container, false);
rinputFullName = (EditText) rootView.findViewById(R.id.name);
rinputEmail = (EditText) rootView.findViewById(R.id.email);
rinputPassword = (EditText) rootView.findViewById(R.id.password);
btnRegister = (Button) rootView.findViewById(R.id.btnRegister);
btnLinkToLogin = (Button) rootView.findViewById(R.id.btnLinkToLoginScreen);
// Progress dialog
rpDialog = new ProgressDialog(getActivity());
rpDialog.setCancelable(false);
// Session manager
context=getContext();
rsession = new SessionManager(context);
// SQLite database handler
rdb = new SQLiteHandler(context);
// Check if user is already logged in or not
if (rsession.isLoggedIn()) {
// User is already logged in. Take him to main activity
Intent intent = new Intent(context,
MainActivity.class);
startActivity(intent);
getActivity().finish();
}
// Register Button Click event
btnRegister.setOnClickListener(new View.OnClickListener() {
public void onClick(View view) {
String name = rinputFullName.getText().toString().trim();
String email = rinputEmail.getText().toString().trim();
String password = rinputPassword.getText().toString().trim();
if (!name.isEmpty() && !email.isEmpty() && !password.isEmpty()) {
if(isEmailValid(email)) {
registerUser(name, email, password);
}else{
Toast.makeText(context,
"Please enter valid email!", Toast.LENGTH_LONG)
.show();
}
} else {
Toast.makeText(context,
"Please enter your details!", Toast.LENGTH_LONG)
.show();
}
}
});
// Link to Login Screen
btnLinkToLogin.setOnClickListener(new View.OnClickListener() {
public void onClick(View view) {
Intent i = new Intent(context,
LoginActivity.class);
startActivity(i);
getActivity().finish();
}
});
return rootView;
}
return null;
}
``
/**
* A {@link FragmentPagerAdapter} that returns a fragment corresponding to
* one of the sections/tabs/pages.
*/
public class SectionsPagerAdapter extends FragmentPagerAdapter {
public SectionsPagerAdapter(FragmentManager fm) {
super(fm);
}
@Override
public Fragment getItem(int position) {
// getItem is called to instantiate the fragment for the given page.
// Return a PlaceholderFragment (defined as a static inner class below).
return PlaceholderFragment.newInstance(position + 1);
}
@Override
public int getCount() {
// Show 3 total pages.
return 2;
}
@Override
public CharSequence getPageTitle(int position) {
switch (position) {
case 0:
return "LOGIN";
case 1:
return "REGISTER";
}
return null;
}
}
答案 0 :(得分：0)
这种情况有两种可能性： -
如果您使用framelayout，则无法滑动标签。您必须单击标签才能对其进行更改。
使用framelayout后，您可以从主活动中获取famelayout id，并且可以使用FragmentTransaction切换片段。
按钮单击片段
FragmentTransaction fragmentTransaction = getFragmentManager().beginTransaction();
fragmentTransaction.replace(R.id.framelayout, new TwoFragment(), "NewFragment TAG");
fragmentTransaction.addToBackStack(null);
fragmentTransaction.commit();