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  3. Почему мой фрагмент падает при переключении на пейзаж?

Почему мой фрагмент падает при переключении на пейзаж?

2014-01-10 2 views
0

Чтобы быть более конкретным, я создал фрагмент учетной записи и фрагмент входа. При переключении на пейзаж в фрагменте создания учетной записи он фактически возвращается к фрагменту входа. И затем, если вы попытаетесь переключиться на портрет, приложение перестанет работать. Я посмотрел на подобные вопросы, но я не мог ничего сделать из них. Я очень ценю помощь парням!Почему мой фрагмент падает при переключении на пейзаж?

CreateAccountFragment

package com.keyconsultant.parse.logintutorial; 
/** 
* Create an Account. Username is the primary method of login. Email is used for forgotten password recovery. 
* 
* @author Trey Robinson 
* 
*/ 
public class CreateAccountFragment extends BaseFragment implements OnClickListener { 

    protected static final String EXTRA_EMAIL = "com.keyconsultant.parse.logintutorial.fragment.extra.EMAIL"; 
    protected static final String EXTRA_USERNAME = "com.keyconsultant.parse.logintutorial.fragment.extra.USERNAME"; 
    protected static final String EXTRA_PASSWORD = "com.keyconsultant.parse.logintutorial.fragment.extra.PASSWORD"; 
    protected static final String EXTRA_CONFIRM = "com.keyconsultant.parse.logintutorial.fragment.extra.CONFIRMPASSWORD"; 

    private EditText mUserNameEditText; 
    private EditText mEmailEditText; 
    private EditText mPasswordEditText; 
    private EditText mConfirmPasswordEditText; 
    private Button mCreateAccountButton; 

    private String mEmail; 
    private String mUsername; 
    private String mPassword; 
    private String mConfirmPassword; 

    /** 
    * Factory method for creating fragment instances. 
    * @return 
    */ 
    public static CreateAccountFragment newInstance(){ 
     return new CreateAccountFragment(); 
    } 

    @Override 
    public View onCreateView(LayoutInflater inflater, ViewGroup container, 
      Bundle savedInstanceState) { 

     View view = inflater.inflate(R.layout.fragment_create_account, container, false); 

     mUserNameEditText = (EditText)view.findViewById(R.id.etUsername); 
     mEmailEditText = (EditText)view.findViewById(R.id.etEmail); 
     mPasswordEditText = (EditText)view.findViewById(R.id.etPassword); 
     mConfirmPasswordEditText = (EditText)view.findViewById(R.id.etPasswordConfirm); 

     mCreateAccountButton = (Button)view.findViewById(R.id.btnCreateAccount); 
     mCreateAccountButton.setOnClickListener(this); 
     return view; 
    } 


    @Override 
    public void onActivityCreated(Bundle savedInstanceState) { 
     super.onActivityCreated(savedInstanceState); 

     if(savedInstanceState != null){ 
      mEmailEditText.setText(savedInstanceState.getString(EXTRA_EMAIL)); 
      mUserNameEditText.setText(savedInstanceState.getString(EXTRA_USERNAME)); 
      mPasswordEditText.setText(savedInstanceState.getString(EXTRA_PASSWORD)); 
      mConfirmPasswordEditText.setText(savedInstanceState.getString(EXTRA_CONFIRM)); 
     } 
    } 

    @Override 
    public void onSaveInstanceState(Bundle outState) { 
     super.onSaveInstanceState(outState); 
     outState.putString(EXTRA_EMAIL, mEmailEditText.getText().toString()); 
     outState.putString(EXTRA_USERNAME, mUserNameEditText.getText().toString()); 
     outState.putString(EXTRA_PASSWORD, mPasswordEditText.getText().toString()); 
     outState.putString(EXTRA_CONFIRM, mConfirmPasswordEditText.getText().toString()); 
    } 

    @Override 
    public void onClick(View v) { 
     switch (v.getId()) { 
     case R.id.btnCreateAccount: 
      createAccount(); 
      break; 

     default: 
      break; 
     } 
    } 

    /** 
    * Some front end validation is done that is not monitored by the service. 
    * If the form is complete then the information is passed to the service. 
    */ 
    private void createAccount(){ 
     clearErrors(); 

     boolean cancel = false; 
     View focusView = null; 

    // Store values at the time of the login attempt. 
     mEmail = mEmailEditText.getText().toString(); 
     mUsername = mUserNameEditText.getText().toString(); 
     mPassword = mPasswordEditText.getText().toString(); 
     mConfirmPassword = mConfirmPasswordEditText.getText().toString(); 

     // Check for a valid confirm password. 
     if (TextUtils.isEmpty(mConfirmPassword)) { 
      mConfirmPasswordEditText.setError(getString(R.string.error_field_required)); 
      focusView = mConfirmPasswordEditText; 
      cancel = true; 
     } else if (mPassword != null && !mConfirmPassword.equals(mPassword)) { 
      mPasswordEditText.setError(getString(R.string.error_invalid_confirm_password)); 
      focusView = mPasswordEditText; 
      cancel = true; 
     } 
     // Check for a valid password. 
     if (TextUtils.isEmpty(mPassword)) { 
      mPasswordEditText.setError(getString(R.string.error_field_required)); 
      focusView = mPasswordEditText; 
      cancel = true; 
     } else if (mPassword.length() < 4) { 
      mPasswordEditText.setError(getString(R.string.error_invalid_password)); 
      focusView = mPasswordEditText; 
      cancel = true; 
     } 

     // Check for a valid email address. 
     if (TextUtils.isEmpty(mEmail)) { 
      mEmailEditText.setError(getString(R.string.error_field_required)); 
      focusView = mEmailEditText; 
      cancel = true; 
     } else if (!mEmail.contains("@")) { 
      mEmailEditText.setError(getString(R.string.error_invalid_email)); 
      focusView = mEmailEditText; 
      cancel = true; 
     } 

     if (cancel) { 
      // There was an error; don't attempt login and focus the first 
      // form field with an error. 
      focusView.requestFocus(); 
     } else { 
      // Show a progress spinner, and kick off a background task to 
      // perform the user login attempt. 
      UserManager.getInstance().signUp(mUsername.toLowerCase(Locale.getDefault()), mEmail, mPassword); 

     } 

    } 

    /** 
    * Remove error messages from all fields. 
    */ 
    private void clearErrors(){ mEmailEditText.setError(null); 
     mUserNameEditText.setError(null); 
     mPasswordEditText.setError(null); 
     mConfirmPasswordEditText.setError(null); 
    } 

    @Subscribe 
    public void onSignInError(AuthenticateUserErrorEvent event){ 
     clearErrors(); 
     switch (event.getErrorCode()) { 
      case ParseException.INVALID_EMAIL_ADDRESS: 
       mEmailEditText.setError(getString(R.string.error_invalid_email)); 
       mEmailEditText.requestFocus(); 
       break; 
      case ParseException.EMAIL_TAKEN: 
       mEmailEditText.setError(getString(R.string.error_duplicate_email)); 
       mEmailEditText.requestFocus(); 
       break; 
      case ParseException.USERNAME_TAKEN: 
       mUserNameEditText.setError(getString(R.string.error_duplicate_username)); 
       mUserNameEditText.requestFocus(); 
       break; 
      default: 
       UnknownErrorDialogFactory.createUnknownErrorDialog(this.getActivity()).show(); 
       break; 
     } 
    } 

}

LoginFragment

package com.keyconsultant.parse.logintutorial; 
/** 
* Fragment for logging in. Includes button for loading the Create account view. 
* 
* @author Trey Robinson 
* 
*/ 
public class LoginFragment extends BaseFragment { 

    public static final String EXTRA_USERNAME = "com.keyconsultant.parse.logintutorial.activity.extra.USERNAME"; 
    public static final String EXTRA_PASSWORD = "com.keyconsultant.parse.logintutorial.activity.extra.PASSWORD"; 

    // UI references. 
    private EditText mUserNameEditText; 
    private EditText mPasswordEditText; 

    /** 
    * Factory method for creating new fragments 
    * 
    * @return 
    */ 
    public static LoginFragment newInstance() { 
     return new LoginFragment(); 
    } 

    @Override 
    public View onCreateView(LayoutInflater inflater, ViewGroup container, 
      Bundle savedInstanceState) { 
     View view = inflater.inflate(R.layout.fragment_login, container, false); 

     mUserNameEditText = (EditText) view.findViewById(R.id.username); 

     mPasswordEditText = (EditText) view.findViewById(R.id.password); 
     mPasswordEditText 
       .setOnEditorActionListener(new TextView.OnEditorActionListener() { 
        @Override 
        public boolean onEditorAction(TextView textView, int id, 
          KeyEvent keyEvent) { 
         if (id == EditorInfo.IME_NULL) { 
          attemptLogin(); 
          return true; 
         } 
         return false; 
        } 
       }); 

     view.findViewById(R.id.sign_in_button).setOnClickListener(
       new View.OnClickListener() { 
        @Override 
        public void onClick(View view) { 
         attemptLogin(); 
        } 
       }); 

     view.findViewById(R.id.register_button).setOnClickListener(
       new View.OnClickListener() { 
        @Override 
        public void onClick(View view) { 
         createAccount(); 
        } 
       }); 

     view.findViewById(R.id.forgot_button).setOnClickListener(
       new View.OnClickListener() { 
        @Override 
        public void onClick(View view) { 
         forgotPassword(); 
        } 
       }); 
     return view; 
    } 

    /** 
    * Open the forgotPassword dialog 
    */ 
    private void forgotPassword() { 
     FragmentManager fm = getActivity().getSupportFragmentManager(); 
     ForgotPasswordDialogFragment forgotPasswordDialog = new ForgotPasswordDialogFragment(); 
     forgotPasswordDialog.show(fm, null); 
    } 

    @Override 
    public void onActivityCreated(Bundle savedInstanceState) { 
     super.onActivityCreated(savedInstanceState); 
     if (savedInstanceState != null) { 
      mUserNameEditText.setText(savedInstanceState 
        .getString(EXTRA_USERNAME)); 
      mPasswordEditText.setText(savedInstanceState 
        .getString(EXTRA_PASSWORD)); 
     } 
    } 

    @Override 
    public void onSaveInstanceState(Bundle outState) { 
     super.onSaveInstanceState(outState); 
     outState.putString(EXTRA_USERNAME, mUserNameEditText.getText() 
       .toString()); 
     outState.putString(EXTRA_PASSWORD, mPasswordEditText.getText() 
       .toString()); 
    } 

    /** 
    * Attempts to sign in or register the account specified by the login form. 
    * If there are form errors (invalid email, missing fields, etc.), the 
    * errors are presented and no actual login attempt is made. 
    */ 
    public void attemptLogin() { 

     clearErrors(); 

     // Store values at the time of the login attempt. 
     String username = mUserNameEditText.getText().toString(); 
     String password = mPasswordEditText.getText().toString(); 

     boolean cancel = false; 
     View focusView = null; 

     // Check for a valid password. 
     if (TextUtils.isEmpty(password)) { 
      mPasswordEditText 
        .setError(getString(R.string.error_field_required)); 
      focusView = mPasswordEditText; 
      cancel = true; 
     } else if (password.length() < 4) { 
      mPasswordEditText 
        .setError(getString(R.string.error_invalid_password)); 
      focusView = mPasswordEditText; 
      cancel = true; 
     } 

     // Check for a valid email address. 
     if (TextUtils.isEmpty(username)) { 
      mUserNameEditText 
        .setError(getString(R.string.error_field_required)); 
      focusView = mUserNameEditText; 
      cancel = true; 
     } 

     if (cancel) { 
      // There was an error; don't attempt login and focus the first 
      // form field with an error. 
      focusView.requestFocus(); 
     } else { 
      // perform the user login attempt. 
      UserManager.getInstance().authenticate(
        username.toLowerCase(Locale.getDefault()), password); 
     } 
    } 

    /** 
    * Load the create account view. 
    */ 
    private void createAccount() { 
     FragmentManager fragmentManager = getActivity() 
       .getSupportFragmentManager(); 
     FragmentTransaction fragmentTransaction = fragmentManager 
       .beginTransaction(); 
     fragmentTransaction 
       .setTransition(FragmentTransaction.TRANSIT_FRAGMENT_OPEN); 
     fragmentTransaction.replace(
       ((ViewGroup) getView().getParent()).getId(), 
       CreateAccountFragment.newInstance()); 
     fragmentTransaction.addToBackStack(null); 
     fragmentTransaction.commit(); 
    } 

    /** 
    * Remove all edit text errors 
    */ 
    private void clearErrors() { 
     mUserNameEditText.setError(null); 
     mPasswordEditText.setError(null); 
    } 

    @Subscribe 
    public void onSignInError(AuthenticateUserErrorEvent event) { 
     clearErrors(); 
     switch (event.getErrorCode()) { 
     case ParseException.OBJECT_NOT_FOUND: 
      mPasswordEditText 
        .setError(getString(R.string.error_incorrect_password)); 
      mPasswordEditText.requestFocus(); 
      break; 
     default: 
      UnknownErrorDialogFactory.createUnknownErrorDialog(
        this.getActivity()).show(); 
      break; 
     } 
    } 
}

Только в случае, если вам это нужно здесь мой LoginActivity

package com.keyconsultant.parse.logintutorial; 

/** 
* Activity which displays a login screen to the user, offering registration as 
* well. Based loosley on the default Login template. 
* 
* @author Trey Robinson 
*/ 
public class LoginActivity extends BaseActivity { 

    @Override 
    protected void onCreate(Bundle savedInstanceState) { 
     super.onCreate(savedInstanceState); 
     setContentView(R.layout.activity_login); 
     this.getWindow().setSoftInputMode(WindowManager.LayoutParams.SOFT_INPUT_STATE_ALWAYS_HIDDEN); 

     Parse.initialize(this, "xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx", 
       "xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx"); 


     FragmentManager fragmentManager = getSupportFragmentManager(); 
     FragmentTransaction fragmentTransaction = fragmentManager 
       .beginTransaction(); 
     fragmentTransaction 
       .replace(R.id.main_view, LoginFragment.newInstance()); 
     fragmentTransaction.commit(); 
     parseCache(); 

    } 

    @Override 
    public boolean onCreateOptionsMenu(Menu menu) { 
     super.onCreateOptionsMenu(menu); 
     getMenuInflater().inflate(R.menu.activity_login, menu); 
     return true; 

    } 

    @Override 
    public boolean onOptionsItemSelected(MenuItem item) { 
     // Handle item selection 
     switch (item.getItemId()) { 
     case R.id.menu_forgot_password: 
      forgotPassword(); 
      return true; 
     default: 
      return super.onOptionsItemSelected(item); 
     } 
    } 

    /** 
    * Open the forgotPassword dialog 
    */ 
    private void forgotPassword() { 
     FragmentManager fm = getSupportFragmentManager(); 
     ForgotPasswordDialogFragment forgotPasswordDialog = new ForgotPasswordDialogFragment(); 
     forgotPasswordDialog.show(fm, null); 
    } 

    @Subscribe 
    public void onSignInStart(AuthenticateUserStartEvent event) { 
     showProgress(true, getString(R.string.login_progress_signing_in)); 
    } 

    @Subscribe 
    public void onSignInSuccess(AuthenticateUserSuccessEvent event) { 
     showProgress(false, getString(R.string.login_progress_signing_in)); 
     Intent loginSuccess = new Intent(this, MainActivity.class); 
     startActivity(loginSuccess); 
     finish(); 
    } 

    @Subscribe 
    public void onSignInError(AuthenticateUserErrorEvent event) { 
     showProgress(false, getString(R.string.login_progress_signing_in)); 
    } 

    @Subscribe 
    public void onForgotPasswordStart(UserForgotPasswordStartEvent event) { 
     showProgress(true, getString(R.string.login_progress_signing_in)); 
    } 

    @Subscribe 
    public void onForgotPasswordSuccess(UserForgotPasswordSuccessEvent event) { 
     showProgress(false, getString(R.string.login_progress_signing_in)); 
     Toast toast = Toast.makeText(this, 
       "A password reset email has been sent.", Toast.LENGTH_LONG); 
     toast.show(); 
    } 

    @Subscribe 
    public void onForgotPasswordError(UserForgotPasswordErrorEvent event) { 
     showProgress(false, getString(R.string.login_progress_signing_in)); 
     Toast toast = Toast.makeText(this, 
       "An error has occured. Please try again.", Toast.LENGTH_LONG); 
     toast.show(); 
    } 

    private void parseCache() { 
     Intent intent; 

     if (ParseUser.getCurrentUser() != null) { 
      intent = new Intent(this, MainActivity.class); 
      startActivity(intent); 
      this.finish(); 
     } 
    } 
}

Вот это LogCat

01-10 16:09:05.796: I/Process(1923): Sending signal. PID: 1923 SIG: 9 
01-10 17:00:57.513: I/Choreographer(1975): Skipped 111 frames! The application may be doing too much work on its main thread. 
01-10 17:00:57.513: D/gralloc_goldfish(1975): Emulator without GPU emulation detected. 
01-10 17:00:58.363: I/Choreographer(1975): Skipped 36 frames! The application may be doing too much work on its main thread. 
01-10 17:00:58.833: I/Choreographer(1975): Skipped 37 frames! The application may be doing too much work on its main thread. 
01-10 17:00:59.163: I/Choreographer(1975): Skipped 32 frames! The application may be doing too much work on its main thread. 
01-10 17:01:11.253: D/dalvikvm(1975): GC_FOR_ALLOC freed 74K, 5% free 5533K/5820K, paused 2ms, total 3ms 
01-10 17:01:11.253: I/dalvikvm-heap(1975): Grow heap (frag case) to 7.992MB for 2500620-byte allocation 
01-10 17:01:11.263: D/dalvikvm(1975): GC_FOR_ALLOC freed 2K, 4% free 7972K/8264K, paused 2ms, total 3ms 
01-10 17:01:11.273: D/dalvikvm(1975): GC_FOR_ALLOC freed <1K, 4% free 7972K/8264K, paused 3ms, total 4ms 
01-10 17:01:11.273: I/dalvikvm-heap(1975): Grow heap (frag case) to 10.696MB for 2838540-byte allocation 
01-10 17:01:11.283: D/dalvikvm(1975): GC_FOR_ALLOC freed 0K, 3% free 10744K/11040K, paused 4ms, total 4ms 
01-10 17:01:15.953: D/dalvikvm(1975): GC_FOR_ALLOC freed 5268K, 45% free 6880K/12360K, paused 0ms, total 3ms 
01-10 17:01:15.953: I/dalvikvm-heap(1975): Grow heap (frag case) to 8.489MB for 1642512-byte allocation 
01-10 17:01:15.973: D/dalvikvm(1975): GC_FOR_ALLOC freed <1K, 32% free 8483K/12360K, paused 13ms, total 13ms 
01-10 17:01:16.053: I/Choreographer(1975): Skipped 42 frames! The application may be doing too much work on its main thread. 
01-10 17:01:17.473: I/Choreographer(1975): Skipped 58 frames! The application may be doing too much work on its main thread. 
01-10 17:01:18.043: I/Choreographer(1975): Skipped 57 frames! The application may be doing too much work on its main thread. 
01-10 17:01:23.363: D/AndroidRuntime(1975): Shutting down VM 
01-10 17:01:23.363: W/dalvikvm(1975): threadid=1: thread exiting with uncaught exception (group=0xb0f2e648) 
01-10 17:01:23.363: E/AndroidRuntime(1975): FATAL EXCEPTION: main 
01-10 17:01:23.363: E/AndroidRuntime(1975): java.lang.NullPointerException 
01-10 17:01:23.363: E/AndroidRuntime(1975):  at com.keyconsultant.parse.logintutorial.LoginFragment.onSaveInstanceState(LoginFragment.java:119) 
01-10 17:01:23.363: E/AndroidRuntime(1975):  at android.support.v4.app.Fragment.performSaveInstanceState(Fragment.java:1607) 
01-10 17:01:23.363: E/AndroidRuntime(1975):  at android.support.v4.app.FragmentManagerImpl.saveFragmentBasicState(FragmentManager.java:1587) 
01-10 17:01:23.363: E/AndroidRuntime(1975):  at android.support.v4.app.FragmentManagerImpl.saveAllState(FragmentManager.java:1655) 
01-10 17:01:23.363: E/AndroidRuntime(1975):  at android.support.v4.app.FragmentActivity.onSaveInstanceState(FragmentActivity.java:527) 
01-10 17:01:23.363: E/AndroidRuntime(1975):  at android.app.Activity.performSaveInstanceState(Activity.java:1147) 
01-10 17:01:23.363: E/AndroidRuntime(1975):  at android.app.Instrumentation.callActivityOnSaveInstanceState(Instrumentation.java:1223) 
01-10 17:01:23.363: E/AndroidRuntime(1975):  at android.app.ActivityThread.handleRelaunchActivity(ActivityThread.java:3714) 
01-10 17:01:23.363: E/AndroidRuntime(1975):  at android.app.ActivityThread.access$700(ActivityThread.java:141) 
01-10 17:01:23.363: E/AndroidRuntime(1975):  at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1262) 
01-10 17:01:23.363: E/AndroidRuntime(1975):  at android.os.Handler.dispatchMessage(Handler.java:99) 
01-10 17:01:23.363: E/AndroidRuntime(1975):  at android.os.Looper.loop(Looper.java:137) 
01-10 17:01:23.363: E/AndroidRuntime(1975):  at android.app.ActivityThread.main(ActivityThread.java:5103) 
01-10 17:01:23.363: E/AndroidRuntime(1975):  at java.lang.reflect.Method.invokeNative(Native Method) 
01-10 17:01:23.363: E/AndroidRuntime(1975):  at java.lang.reflect.Method.invoke(Method.java:525) 
01-10 17:01:23.363: E/AndroidRuntime(1975):  at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:737) 
01-10 17:01:23.363: E/AndroidRuntime(1975):  at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:553) 
01-10 17:01:23.363: E/AndroidRuntime(1975):  at dalvik.system.NativeStart.main(Native Method)

источник

2014-01-10 Anonymous

+1

Нет ли что-либо связанного с крушением в вашем логарифме? –

+0

01-10 16: 09: 01.806: W/dalvikvm (1923): threadid = 1: поток, выходящий с неперехваченным исключением (группа = 0xb0f2e648) –

+0

01-10 16: 09: 01.806: E/AndroidRuntime (1923): FATAL EXCEPTION : main –

ответ

0

Ваш LogCat показывает у вас есть проблемы в LoginFragment.onSaveInstanceState()

Во-первых, сделать super.onSaveInstanceState() последняя строка вместо первой строки, как сейчас.

Затем убедитесь, что у вас нет mUserName и mPassword и их тексты, nulls

Initialize mUserName и тексты паролей к «» где-то и ошибка должна исчезнуть, я думаю.

источник

2014-01-10 22:13:23

+0

intitial musername и mpassword в loginfragment? –

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