안드로이드 Realm 관련 오류가 뜨는데 해결을 못하겠습니다..

Question

무슨 오류인지 저는 도저히 찾지를 못하겠네요.....

오류내용 :

E/AndroidRuntime: FATAL EXCEPTION: main
                  Process: com.example.gjsxj.examtable, PID: 16992
                  java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.gjsxj.examtable/com.example.gjsxj.examtable.MainActivity}: io.realm.exceptions.RealmMigrationNeededException: Field count is less than expected - expected 3 but was 2
                      at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2892)
                      at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:3027)
                      at android.app.servertransaction.LaunchActivityItem.execute(LaunchActivityItem.java:78)
                      at android.app.servertransaction.TransactionExecutor.executeCallbacks(TransactionExecutor.java:101)
                      at android.app.servertransaction.TransactionExecutor.execute(TransactionExecutor.java:73)
                      at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1786)
                      at android.os.Handler.dispatchMessage(Handler.java:106)
                      at android.os.Looper.loop(Looper.java:164)
                      at android.app.ActivityThread.main(ActivityThread.java:6656)
                      at java.lang.reflect.Method.invoke(Native Method)
                      at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:438)
                      at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:823)
                   Caused by: io.realm.exceptions.RealmMigrationNeededException: Field count is less than expected - expected 3 but was 2
                      at io.realm.UserRealmProxy.validateTable(UserRealmProxy.java:196)
                      at io.realm.DefaultRealmModuleMediator.validateTable(DefaultRealmModuleMediator.java:46)
                      at io.realm.Realm.initializeRealm(Realm.java:480)
                      at io.realm.Realm.createAndValidateFromCache(Realm.java:423)
                      at io.realm.Realm.createInstance(Realm.java:387)
                      at io.realm.RealmCache.doCreateRealmOrGetFromCache(RealmCache.java:346)
                      at io.realm.RealmCache.createRealmOrGetFromCache(RealmCache.java:284)
                      at io.realm.Realm.getDefaultInstance(Realm.java:281)
                      at com.example.gjsxj.examtable.MainActivity.onCreate(MainActivity.java:35)
                      at android.app.Activity.performCreate(Activity.java:7117)
                      at android.app.Activity.performCreate(Activity.java:7108)
                      at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1262)
                      at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2867)
                      at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:3027) 
                      at android.app.servertransaction.LaunchActivityItem.execute(LaunchActivityItem.java:78) 
                      
                     

자바

package com.example.gjsxj.examtable;

import android.app.Activity;
import android.support.annotation.Nullable;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.ArrayAdapter;
import android.widget.EditText;
import android.widget.Spinner;
import android.widget.TextView;
import android.widget.Toast;

import io.realm.Realm;
import io.realm.RealmChangeListener;
import io.realm.RealmResults;

public class MainActivity extends AppCompatActivity{

    private Spinner mDepartment;
    private Spinner mGrade;
    private Spinner mClass;

    private Realm mRealm;

    @Override
    protected void onCreate(@Nullable Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        mDepartment = (Spinner)findViewById(R.id.department_spinner);
        mGrade = (Spinner)findViewById(R.id.grade_spinner);
        mClass = (Spinner)findViewById(R.id.class_spinner);

        mRealm = Realm.getDefaultInstance();

        ArrayAdapter<CharSequence> adapter1 = ArrayAdapter.createFromResource(this, R.array.department_array,
                android.R.layout.simple_spinner_item);
        adapter1.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
        mDepartment.setAdapter(adapter1);

        ArrayAdapter<CharSequence> adapter2 = ArrayAdapter.createFromResource(this, R.array.grade_array,
                android.R.layout.simple_spinner_item);
        adapter2.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
        mGrade.setAdapter(adapter2);

        ArrayAdapter<CharSequence> adapter3 = ArrayAdapter.createFromResource(this, R.array.class_array,
                android.R.layout.simple_spinner_item);
        adapter3.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
        mClass.setAdapter(adapter3);


    }

    @Override
    protected void onDestroy() {
        super.onDestroy();

        mRealm.removeAllChangeListeners();
        mRealm.close();
    }


    public void information(View view) {
        mRealm.executeTransaction(new Realm.Transaction() {
            @Override
            public void execute(Realm realm) {
                if (realm.where(User.class)
                        .equalTo("department", mDepartment.getBaseline())
                        .count() == 0) {
                    User user = mRealm.createObject(User.class);
                    user.setDepartment(mDepartment.toString());
                    user.setGrade(mGrade.toString());
                    user.setGrade_class(mClass.toString());
                }
            }
        });
    }
}

 

Comments

디비 테이블을 수정했나 봅니다.
io.realm.exceptions.RealmMigrationNeededException: Field count is less than expected - expected 3 but was 2

http://developer88.tistory.com/77

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답변 정말로 감사드립니다!