버전은 헤일로 릴리즈 1이라고 되있구요
일단 소스부터 올릴께요
package exam.monami153;
import android.app.*; import android.os.*; import android.view.*; import android.widget.*;
public class monami153 extends Activity { View mMain, mSub, mHow; /** Called when the activity is first created. */ @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main);
mMain = findViewById(R.layout.main); mSub = findViewById(R.layout.sub); mHow = findViewById(R.layout.how); findViewById(R.id.Calcul).setOnClickListener(mClickListener); findViewById(R.id.How).setOnClickListener(mClickListener); findViewById(R.id.Exit).setOnClickListener(mClickListener); findViewById(R.id.Calcul).setOnClickListener(mClickListener); findViewById(R.id.Clear).setOnClickListener(mClickListener); } Button.OnClickListener mClickListener = new Button.OnClickListener() { public void onClick(View v) { mMain.setVisibility(View.INVISIBLE); mSub.setVisibility(View.INVISIBLE); switch (v.getId()) { case R.id.Calcul: mSub.setVisibility(View.VISIBLE);{ switch (v.getId()){ case R.id.Calcul: break; case R.id.Clear: mSub.setVisibility(View.VISIBLE); break; } }; break; case R.id.How: ; case R.id.Exit: System.exit(0); } } }; }
이런데
이클립스 상에서는 에러 안뜨다가
로그켓을 보면 25번째 줄인 findViewById(R.id.Calcul).setOnClickListener(mClickListener);가 에러라고 뜨네요
로그켓은 이렇게 뜨구요
04-28 18:52:14.041: ERROR/AndroidRuntime(629): Uncaught handler: thread main exiting due to uncaught exception
04-28 18:52:14.061: ERROR/AndroidRuntime(629): java.lang.RuntimeException: Unable to start activity ComponentInfo{exam.monami153/exam.monami153.monami153}: java.lang.NullPointerException
04-28 18:52:14.061: ERROR/AndroidRuntime(629): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2496)
04-28 18:52:14.061: ERROR/AndroidRuntime(629): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2512)
04-28 18:52:14.061: ERROR/AndroidRuntime(629): at android.app.ActivityThread.access$2200(ActivityThread.java:119)
04-28 18:52:14.061: ERROR/AndroidRuntime(629): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1863)
04-28 18:52:14.061: ERROR/AndroidRuntime(629): at android.os.Handler.dispatchMessage(Handler.java:99)
04-28 18:52:14.061: ERROR/AndroidRuntime(629): at android.os.Looper.loop(Looper.java:123)
04-28 18:52:14.061: ERROR/AndroidRuntime(629): at android.app.ActivityThread.main(ActivityThread.java:4363)
04-28 18:52:14.061: ERROR/AndroidRuntime(629): at java.lang.reflect.Method.invokeNative(Native Method)
04-28 18:52:14.061: ERROR/AndroidRuntime(629): at java.lang.reflect.Method.invoke(Method.java:521)
04-28 18:52:14.061: ERROR/AndroidRuntime(629): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:860)
04-28 18:52:14.061: ERROR/AndroidRuntime(629): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:618)
04-28 18:52:14.061: ERROR/AndroidRuntime(629): at dalvik.system.NativeStart.main(Native Method)
04-28 18:52:14.061: ERROR/AndroidRuntime(629): Caused by: java.lang.NullPointerException
04-28 18:52:14.061: ERROR/AndroidRuntime(629): at exam.monami153.monami153.onCreate(monami153.java:28)
04-28 18:52:14.061: ERROR/AndroidRuntime(629): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1047)
04-28 18:52:14.061: ERROR/AndroidRuntime(629): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2459)
04-28 18:52:14.061: ERROR/AndroidRuntime(629): ... 11 more
어떻게 잘못되는건지 아예 감을 못잡아서요;; 제발 답변 부탁드립니다
xml을 1개로 줄이면 되긴되는데 표시될것만 표시되지 않고 이상한것들도 떠버려서
2개로 하고 있는데 계속 이러네요;;
1개는 그냥 설명하는 페이지라서 적지는 않았습니다
읽어주셔서 감사하고 답변좀 꼭 부탁드리겠습니다