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Я получаю ошибкуПочему я получаю нулевой указатель execepiton при поиске фрагмента по ID?
java.lang.RuntimeException: Невозможно начать деятельность ComponentInfo {com.example.dhruv.parqueue/com.example.dhruv.parqueue.UserProfile}: java.lang.NullPointerException : Попытка вызвать виртуальный метод 'android.view.View android.app.Dialog.findViewById (интермедиат)' на нуль ссылки на объект
Вот мой код
public class UserProfile extends AppCompatActivity {
FragmentManager fm;
CheckBox showPassword;
Dialog passwordChangeDialog;
private ImageView imageView;
SharedPreferences preferences;
private final int SELECT_PHOTO = 1;
TextView nameText, contactText, emailText;
PasswordChangeFragment passwordChangeFragment;
Button confirmButton, changePassword, pickImage;
EditText nameEdit, contactEdit, newPassword, oldPassword;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_user_profile);
preferences = getSharedPreferences("MyFiles", MODE_PRIVATE);
imageView = (ImageView) findViewById(R.id.imageView);
pickImage = (Button) findViewById(R.id.btn_pick);
changePassword = (Button) findViewById(R.id.changePassword);
fm = getSupportFragmentManager();
passwordChangeFragment = PasswordChangeFragment.newInstance("Change Password");
passwordChangeDialog = passwordChangeFragment.getDialog();
showPassword = (CheckBox) passwordChangeDialog.findViewById(R.id.show_password);
newPassword = (EditText) passwordChangeDialog.findViewById(R.id.new_password);
oldPassword = (EditText) passwordChangeDialog.findViewById(R.id.old_password);
confirmButton = (Button) passwordChangeDialog.findViewById(R.id.confirm_btn);
SharedPreferences.Editor editor = preferences.edit();
editor.putBoolean("editButtonClicked", false);
editor.commit();
setProfile();
pickImage.setVisibility(pickImage.GONE);
changePassword.setVisibility(changePassword.GONE);
new ProfileSyncTask().execute();
pickImage.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View view) {
Intent photoPickerIntent = new Intent(Intent.ACTION_PICK);
photoPickerIntent.setType("image/*");
startActivityForResult(photoPickerIntent, SELECT_PHOTO);
}
});
changePassword.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
passwordChangeFragment.show(fm, "change_password_fragment");
}
});
showPassword.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {
@Override
public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
if (!isChecked) {
newPassword.setInputType(InputType.TYPE_TEXT_VARIATION_PASSWORD);
} else {
newPassword.setInputType(129);
}
}
});
confirmButton.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
if (matchpassword(oldPassword.getText().toString())) {
String changedPassword = newPassword.getText().toString();
//Write this password to Database and Display Success using AlertFragment
} else {
//Display Wrong Password using AlertFragment
}
}
});
}
.
.
.
}
Я получаю ошибку в строке:
showPassword = (CheckBox) passwordChangeDialog.findViewById(R.id.show_password);
Вот полная ошибка
02-03 13:54:49.112 24058-24058/com.example.dhruv.parqueue E/AndroidRuntime: FATAL EXCEPTION: main
Process: com.example.dhruv.parqueue, PID: 24058
java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.dhruv.parqueue/com.example.dhruv.parqueue.UserProfile}: java.lang.NullPointerException: Attempt to invoke virtual method 'android.view.View android.app.Dialog.findViewById(int)' on a null object reference
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2450)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2520)
at android.app.ActivityThread.-wrap11(ActivityThread.java)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1363)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:148)
at android.app.ActivityThread.main(ActivityThread.java:5466)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:726)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:616)
Caused by: java.lang.NullPointerException: Attempt to invoke virtual method 'android.view.View android.app.Dialog.findViewById(int)' on a null object reference
at com.example.dhruv.parqueue.UserProfile.onCreate(UserProfile.java:97)
at android.app.Activity.performCreate(Activity.java:6251)
at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1108)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2403)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2520)
at android.app.ActivityThread.-wrap11(ActivityThread.java)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1363)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:148)
at android.app.ActivityThread.main(ActivityThread.java:5466)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:726)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:616)
Вот код для файла change_password_fragment
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
android:padding="50dp">
<EditText
android:id="@+id/old_password"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:hint="@string/current_password"
android:inputType="textPassword" />
<EditText
android:id="@+id/new_password"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:hint="@string/new_password"
android:inputType="textVisiblePassword" />
<CheckBox
android:id="@+id/show_password"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginTop="5dp"
android:text="@string/show_password" />
<Button
android:id="@+id/confirm_btn"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center_horizontal"
android:layout_marginTop="10dp"
android:text="@string/Confirm" />
</LinearLayout>
Edit:
Я изменил свой код (согласно предложению) и воспользовался nted onCreateDialog следующий
public class PasswordChangeFragment extends DialogFragment {
public PasswordChangeFragment() {
}
public static PasswordChangeFragment newInstance(String title, String userID) {
PasswordChangeFragment frag = new PasswordChangeFragment();
Bundle args = new Bundle();
args.putString("title", title);
args.putString("userID", userID);
frag.setArguments(args);
return frag;
}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
return inflater.inflate(R.layout.change_password_fragment, container);
}
View myView;
@Override
public Dialog onCreateDialog(Bundle savedInstanceState){
String title = getArguments().getString("title", "Change Password");
final String userID = getArguments().getString("userID", "");
AlertDialog.Builder builder = new AlertDialog.Builder(getActivity());
builder.setMessage("foo")
.setPositiveButton("Start timer", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int id) {
}
})
.setNegativeButton("Cancel", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int id) {
// Cancel
}
});
LayoutInflater inflater = getActivity().getLayoutInflater();
myView = inflater.inflate(R.layout.change_password_fragment, null);
builder.setView(myView);
final CheckBox showPassword = (CheckBox) myView.findViewById(R.id.show_password);
final EditText newPassword = (EditText) myView.findViewById(R.id.new_password);
final EditText oldPassword = (EditText) myView.findViewById(R.id.old_password);
final Button confirmButton = (Button) myView.findViewById(R.id.confirm_btn);
showPassword.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {
@Override
public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
if (!isChecked) {
newPassword.setInputType(InputType.TYPE_TEXT_VARIATION_PASSWORD);
} else {
newPassword.setInputType(129);
}
}
});
confirmButton.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
Helper helper = new Helper();
try {
if (helper.matchPassword(userID, oldPassword.getText().toString())) {
String changedPassword = newPassword.getText().toString();
//Write this password to Database and Display Success using AlertFragment
} else {
//Display Wrong Password using AlertFragment
}
} catch (ExecutionException e) {
e.printStackTrace();
} catch (InterruptedException e) {
e.printStackTrace();
}
}
});
return builder.create();
}
@Override
@Nullable
public void onViewCreated(View view, @Nullable Bundle savedInstanceState) {
super.onViewCreated(view, savedInstanceState);
// Get field from view
String title = getArguments().getString("title", "Change Password");
final String userID = getArguments().getString("userID", "");
// Fetch arguments from bundle and set title
FragmentManager fm = getActivity().getSupportFragmentManager();
PasswordChangeFragment passwordChangeFragment = PasswordChangeFragment.newInstance(title, userID);
}
}
Теперь я получаю ошибку
FATAL EXCEPTION: main
Process: com.example.dhruv.parqueue, PID: 3564
android.util.AndroidRuntimeException: requestFeature() must be called before adding content
at com.android.internal.policy.PhoneWindow.requestFeature(PhoneWindow.java:317)
at com.android.internal.app.AlertController.installContent(AlertController.java:231)
at android.app.AlertDialog.onCreate(AlertDialog.java:423)
at android.app.Dialog.dispatchOnCreate(Dialog.java:394)
at android.app.Dialog.show(Dialog.java:295)
at android.support.v4.app.DialogFragment.onStart(DialogFragment.java:406)
at android.support.v4.app.Fragment.performStart(Fragment.java:1986)
at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:1102)
at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:1248)
at android.support.v4.app.BackStackRecord.run(BackStackRecord.java:738)
at android.support.v4.app.FragmentManagerImpl.execPendingActions(FragmentManager.java:1613)
at android.support.v4.app.FragmentManagerImpl$1.run(FragmentManager.java:517)
at android.os.Handler.handleCallback(Handler.java:739)
at android.os.Handler.dispatchMessage(Handler.java:95)
at android.os.Looper.loop(Looper.java:148)
at android.app.ActivityThread.main(ActivityThread.java:5417)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:726)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:616)
Инстанцировать кнопки с новыми кнопками(); и другие компоненты тоже ... они являются нулевыми, потому что не созданы ... и делают некоторые исследования, прежде чем отправлять такие вопросы, как вы можете получить слишком много downvotes. – therealprashant
. Где вы указали в диалоговом окне «Диалог» в коде? –
опубликуйте свой xml и код PasswordChangeFragment – kopikaokao