버튼을 클릭했을 때 활동 방식을 실행할 수 없습니다.

Android 앱을 개발 중입니다. 내가 누르면 "getdata"기능을 시작하는 버튼이 있습니다. 로그 cat에 오류가 발생합니다. "public int Day (int a)"메서드에 문제가 있다고 생각합니다. 나는 안드로이드 애플 리케이션 개발에 처음이다. 도와주세요.버튼을 클릭했을 때 활동 방식을 실행할 수 없습니다.

로그 캣 :

07-06 19:11:51.609: E/AndroidRuntime(5231): FATAL EXCEPTION: main 
07-06 19:11:51.609: E/AndroidRuntime(5231): java.lang.IllegalStateException: Could not  execute method of the activity 
07-06 19:11:51.609: E/AndroidRuntime(5231):  at android.view.View$1.onClick(View.java:3680) 
07-06 19:11:51.609: E/AndroidRuntime(5231):  at android.view.View.performClick(View.java:4191) 
07-06 19:11:51.609: E/AndroidRuntime(5231):  at android.view.View$PerformClick.run(View.java:17229) 
07-06 19:11:51.609: E/AndroidRuntime(5231):  at android.os.Handler.handleCallback(Handler.java:615) 
07-06 19:11:51.609: E/AndroidRuntime(5231):  at android.os.Handler.dispatchMessage(Handler.java:92) 
07-06 19:11:51.609: E/AndroidRuntime(5231):  at android.os.Looper.loop(Looper.java:137) 
07-06 19:11:51.609: E/AndroidRuntime(5231):  at android.app.ActivityThread.main(ActivityThread.java:4960) 
07-06 19:11:51.609: E/AndroidRuntime(5231):  at java.lang.reflect.Method.invokeNative(Native Method) 
07-06 19:11:51.609: E/AndroidRuntime(5231):  at java.lang.reflect.Method.invoke(Method.java:511) 
07-06 19:11:51.609: E/AndroidRuntime(5231):  at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1038) 
07-06 19:11:51.609: E/AndroidRuntime(5231):  at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:805) 
07-06 19:11:51.609: E/AndroidRuntime(5231):  at dalvik.system.NativeStart.main(Native Method) 
07-06 19:11:51.609: E/AndroidRuntime(5231): Caused by: java.lang.reflect.InvocationTargetException 
07-06 19:11:51.609: E/AndroidRuntime(5231):  at java.lang.reflect.Method.invokeNative(Native Method) 
07-06 19:11:51.609: E/AndroidRuntime(5231):  at java.lang.reflect.Method.invoke(Method.java:511) 
07-06 19:11:51.609: E/AndroidRuntime(5231):  at android.view.View$1.onClick(View.java:3675) 
07-06 19:11:51.609: E/AndroidRuntime(5231):  ... 11 more 
07-06 19:11:51.609: E/AndroidRuntime(5231): Caused by: java.lang.NullPointerException 
07-06 19:11:51.609: E/AndroidRuntime(5231):  at ishan.khandelwal.vitsilentmode.Labs.getdata(Labs.java:100) 
07-06 19:11:51.609: E/AndroidRuntime(5231):  ... 14 more 



public class Labs extends Activity { 

//Initialise Calendars 

private Calendar L[]; 

ArrayList <CheckBox> l= new ArrayList <CheckBox>(60); 

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

    //Initialise check boxes for every slot 
    for (int i = 101; i <= 160; i++) { 
      String viewId = "checkBox" + i; 
      l.add((CheckBox) findViewById(getResources().getIdentifier(viewId, "id", getPackageName()))); 
     }  
}

내 코드 : 사전에

@Override 
public boolean onCreateOptionsMenu(Menu menu) { 
    // Inflate the menu; this adds items to the action bar if it is present. 
    getMenuInflater().inflate(R.menu.main, menu); 
    return true; 
} 

public void addenable(){ 

} 

public int Day(int a) 
{ 
    int d=0; 
    int x = a; 
    x--; 

    if(x>=30) 
     d = (x/6)-3; 

    else 
     d=(x/6)+2; 

    return d; 
} 

public int Hour(int a) 
{ 
    int hr=0; 
    int x=a; 

    x--; 

    hr=(x%6)+8; 

    if(x>=4) 
     hr--; 

    if(x>=30) 
     hr = hr+6; 

    return hr; 

} 

public int Min(int a) 
{ 
    int m=0; 
    int x=a; 

    if(x%6==5) 
     m=50; 

    if(x%6==0) 
     m=40; 

    return m; 
} 

public void getdata(View V){ 

    for(int i=0; i<60; i++) 
    { 
     L[i+1] = Calendar.getInstance(); 
     L[i+1].set(Calendar.DAY_OF_WEEK, Day(i+1)); 
     L[i+1].set(Calendar.HOUR_OF_DAY, Hour(i+1)); 
     L[i+1].set(Calendar.MINUTE, Min(i+1)); 
     L[i+1].set(Calendar.SECOND, 0); 
     } 

    //Intents 
    Intent setVibration = new Intent(); 
    setVibration.setClass(this, AlarmReciever.class); 

    Intent setNormal = new Intent(); 
    setNormal.setClass(this, RingerMode.class); 

    //PENDING INTENTS 
    ArrayList <PendingIntent> Lab_V= new ArrayList <PendingIntent>(60); 
    ArrayList <PendingIntent> Lab_N= new ArrayList <PendingIntent>(60); 

    for(int i=0; i<60; i++) 
    { 
     Lab_V.add(i, PendingIntent.getBroadcast(this, i, setVibration, 
       PendingIntent.FLAG_UPDATE_CURRENT)); 
     Lab_N.add(i, PendingIntent.getBroadcast(this, i, setNormal, 
       PendingIntent.FLAG_UPDATE_CURRENT)); 
    } 

    // create the object 
    AlarmManager mAlarmManager = (AlarmManager) getSystemService(Context.ALARM_SERVICE); 

    for(int i=0; i<60; i++) 
    { 
      if(l.get(i).isChecked()){ 

      mAlarmManager.setRepeating(AlarmManager.RTC_WAKEUP, L[i].getTimeInMillis(), 7*24*60*60*1000, Lab_V.get(i)); 
      mAlarmManager.setRepeating(AlarmManager.RTC_WAKEUP, L[i].getTimeInMillis()+50*60*1000, 7*24*60*60*1000, Lab_N.get(i)); 

      } 
    } 

    } 
}

감사합니다. 당신이 데이터를 만들 때, 당신은 1(i+1) not 0에서 시작

Caused by: java.lang.NullPointerException

출처

2014-07-06 Ish

당신은 null 객체에 접근하고 있습니다.

for(int i=0; i<60; i++) 
{ 
    L[i+1] = Calendar.getInstance(); 
    L[i+1].set(Calendar.DAY_OF_WEEK, Day(i+1)); 
    L[i+1].set(Calendar.HOUR_OF_DAY, Hour(i+1)); 
    L[i+1].set(Calendar.MINUTE, Min(i+1)); 
    L[i+1].set(Calendar.SECOND, 0); 
}

하지만, 나중에 인덱스 0 항목을 읽으려는 :

for(int i=0; i<60; i++) 
{ 
     if(l.get(i).isChecked()){ 
      // ... 
     } 
}

l.get(0) null을 반환하고 null 객체에 isChecked() 전화는 NullPointerException 원인이됩니다.

출처

2014-07-06 13:57:53

버튼을 클릭했을 때 활동 방식을 실행할 수 없습니다.

답변

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