안드로이드 EditText.getText.tostring 에러 질문입니다.

Question

아래와 같은 에러가 발생되는데 원인을 모르겠습니다.. 도와주시면 감사하겠습니다 ㅠㅠ getText.tostring은 원래 널값을 허용하지 않나요?? 저는 널값을 허용하고 싶어서요... Call> call = rs.listDiet(keyword);이부분에 널값이 들어가면 모든 리스트가 출력되도록 하고 싶거든요.. E/AndroidRuntime: FATAL EXCEPTION: main Process: com.example.calog, PID: 31255 java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.calog/com.example.calog.Diet.FoodSearchActivity}: java.lang.NullPointerException: Attempt to invoke virtual method 'android.text.Editable android.widget.EditText.getText()' on a null object reference at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2913) at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:3048) at android.app.servertransaction.LaunchActivityItem.execute(LaunchActivityItem.java:78) at android.app.servertransaction.TransactionExecutor.executeCallbacks(TransactionExecutor.java:108) at android.app.servertransaction.TransactionExecutor.execute(TransactionExecutor.java:68) at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1808) at android.os.Handler.dispatchMessage(Handler.java:106) at android.os.Looper.loop(Looper.java:193) at android.app.ActivityThread.main(ActivityThread.java:6669) at java.lang.reflect.Method.invoke(Native Method) at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:493) at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:858) Caused by: java.lang.NullPointerException: Attempt to invoke virtual method 'android.text.Editable android.widget.EditText.getText()' on a null object reference at com.example.calog.Diet.FoodSearchActivity.onCreate(FoodSearchActivity.java:59) at android.app.Activity.performCreate(Activity.java:7136) at android.app.Activity.performCreate(Activity.java:7127) at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1271) package com.example.calog.Diet; import androidx.annotation.Nullable; import androidx.appcompat.app.AppCompatActivity; import androidx.fragment.app.Fragment; import androidx.fragment.app.FragmentManager; import androidx.fragment.app.FragmentStatePagerAdapter; import androidx.recyclerview.widget.RecyclerView; import androidx.viewpager.widget.ViewPager; import android.content.Intent; import android.os.Bundle; import android.text.TextUtils; import android.view.View; import android.widget.Button; import android.widget.EditText; import android.widget.ImageView; import com.example.calog.MainHealthActivity; import com.example.calog.R; import com.example.calog.RemoteService; import com.example.calog.VO.DietMenuVO; import com.google.android.material.tabs.TabLayout; import java.util.ArrayList; import java.util.List; import retrofit2.Call; import retrofit2.Callback; import retrofit2.Response; import retrofit2.Retrofit; import retrofit2.converter.gson.GsonConverterFactory; import static com.example.calog.RemoteService.BASE_URL; public class FoodSearchActivity extends AppCompatActivity { RecyclerView dietList; Button btnSave, btnSearch; ImageView btnBack, btnHome; EditText searchEdit; Intent intent; Retrofit retrofit; RemoteService rs; List array; TabLayout tabLayout; ViewPager viewPager; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_food_search); tabLayout = findViewById(R.id.tabLayout); viewPager = findViewById(R.id.foodListPager); dietList = findViewById(R.id.dietList); searchEdit = findViewById(R.id.searchEdit); btnSearch = findViewById(R.id.btnSearch); System.out.println("<<<<<<<<<<<<<<<<<<<<<<<<<<<< fragments = new ArrayList<>(); String[] tabTitle = {"검색", "자주 찾는 음식", "내음식"}; //생성자로 데이터를 던져서 바차트를 다르게 표현해야함. public PagerAdapter(FragmentManager fm) { super(fm); //가짜 데이터 집어넣기 실제 구현할때 DB와 연계할것 final List dietMenuArray = new ArrayList(); try { System.out.println("<<<<<<<<<<<<<<<<<<<<<<<<<<<<> call = rs.listDiet(keyword); call.enqueue(new Callback>() { @Override public void onResponse(Call> call, Response> response) { array = response.body(); // System.out.println("<<<<<<<<<<<<<<<<> call, Throwable t) { // Log("Main 통신", "에러 "+t.getLocalizedMessage()); } }); } catch (Exception e) { e.printStackTrace(); System.out.println(e.toString()); } // dietMenuArray.add(new DietMenuVO("아이템에서 갑슬 가져와야 하나?", 300)); // dietMenuArray.add(new DietMenuVO("짜장면", 300)); // dietMenuArray.add(new DietMenuVO("우동", 200)); // dietMenuArray.add(new DietMenuVO("탕수육", 400)); //자주 찾는 음식 List MyDietList = new ArrayList(); //내 음식 fragments.add(new DietFragment(dietMenuArray, true)); //검색 fragments.add(new DietFragment(dietMenuArray, false)); //자주 찾는 음식 fragments.add(new DietFragment(dietMenuArray, false)); //내 음식 } @Override public Fragment getItem(int position) { return fragments.get(position); } @Override public int getCount() { return fragments.size(); } @Nullable @Override public CharSequence getPageTitle(int position) { return tabTitle[position]; //탭레이아웃 타이틀설정 } } public void pageTrans() { btnBack = findViewById(R.id.btnBack); btnBack.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View view) { finish(); } }); btnHome = findViewById(R.id.btnHome); btnHome.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View view) { intent = new Intent(FoodSearchActivity.this, MainHealthActivity.class); startActivity(intent); } }); } private void rsBuilder() { retrofit = new Retrofit.Builder() //Retrofit 빌더생성 .baseUrl(BASE_URL) .addConverterFactory(GsonConverterFactory.create()) .build(); rs = retrofit.create(RemoteService.class); //API 인터페이스 생성 } /* public void callviewPagerAdapter() { PagerAdapter pagerAdapter = new PagerAdapter(getSupportFragmentManager()); viewPager.setAdapter(pagerAdapter); tabLayout.setupWithViewPager(viewPager); } */ }

CyanGlint · Answer

null에 toString()을 호출하는게 가능한 일인지 잠깐 고민해보세요.원하시는 형태로 구현하려면 null체크를 거치시거나 String.valueOf() 등을 사용하셔야 할것 같네요.

까까 · Answer

답변 주셔서 감사합니다.인플레이터를 사용하라는 조언이 있어 해봤는데 널값도 가져와지더라구요.

안드로이드 EditText.getText.tostring 에러 질문입니다.

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