안드로이드 textView.setText() 응용 프로그램을 무력화

나는 모든 것을 조사했지만 여기에 게시 된 일반적인 답이나 다른 곳에서는 도움이되지 않습니다. 내 Activity의 onCreate 함수에서 코드를 통해 TextView의 텍스트를 설정하려고하는데 그냥 작동하지 않습니다. (: 중첩 된 조각 코드 편집) :안드로이드 textView.setText() 응용 프로그램을 무력화

import android.content.Intent; 
import android.os.Bundle; 
import android.support.v4.app.Fragment; 
import android.support.v7.app.ActionBarActivity; 
import android.view.LayoutInflater; 
import android.view.Menu; 
import android.view.MenuItem; 
import android.view.View; 
import android.view.ViewGroup; 
import android.widget.EditText; 
import android.widget.TextView; 
import android.widget.Toast; 

public class NationalActivity extends ActionBarActivity { 

private String nationID; 
public static final String REVENUE_MESSAGE = "com.murrow.natlrevcalc.REVENUE"; 
private int revenue; 


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

    if (savedInstanceState == null) { 
     getSupportFragmentManager().beginTransaction() 
       .add(R.id.container, new NationalFragment()).commit(); 
    } 

    Intent i = getIntent(); 
    nationID = i.getStringExtra(RunNationalsActivity.NATION); 
} 

@Override 
public boolean onCreateOptionsMenu(Menu menu) { 

    // Inflate the menu; this adds items to the action bar if it is present. 
    getMenuInflater().inflate(R.menu.national, menu); 
    return true; 
} 

@Override 
public boolean onOptionsItemSelected(MenuItem item) { 
    // Handle action bar item clicks here. The action bar will 
    // automatically handle clicks on the Home/Up button, so long 
    // as you specify a parent activity in AndroidManifest.xml. 
    int id = item.getItemId(); 
    if (id == R.id.action_settings) { 
     return true; 
    } 
    return super.onOptionsItemSelected(item); 
} 

/** 
* National Fragment 
*/ 
public static class NationalFragment extends Fragment { 

    public NationalFragment() { 
    } 

    @Override 
    public View onCreateView(LayoutInflater inflater, ViewGroup container, 
      Bundle savedInstanceState) { 
     View rootView = inflater.inflate(R.layout.fragment_national, 
       container, false); 

     TextView test = (TextView)getView().findViewById(R.id.townText); 
     test.setText("This is not working"); 

     return rootView; 


    } 
}

}

활동 XML : 여기

은 활동 코드입니다

<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android" 
xmlns:tools="http://schemas.android.com/tools" 
android:id="@+id/container" 
android:layout_width="match_parent" 
android:layout_height="match_parent" 
tools:context="com.murrow.natlrevcalc.NationalActivity" 
tools:ignore="MergeRootFrame" > 

<RelativeLayout 
    android:layout_width="match_parent" 
    android:layout_height="match_parent" > 

</RelativeLayout>

조각 (여기서의 모든 정보는) XML :

,363,210

<TableLayout xmlns:android="http://schemas.android.com/apk/res/android" 
xmlns:tools="http://schemas.android.com/tools" 
android:layout_width="match_parent" 
android:layout_height="match_parent" 
android:paddingLeft="@dimen/activity_horizontal_margin" 
android:paddingRight="@dimen/activity_horizontal_margin" 
android:paddingTop="@dimen/activity_vertical_margin" 
tools:context=".NationalActivity$NationalFragment" > 

<ScrollView 
    android:layout_width="fill_parent" 
    android:layout_height="wrap_content" > 

    <TableLayout 
     android:id="@+id/nationalLayout" 
     android:layout_width="wrap_content" 
     android:layout_height="wrap_content" 
     android:orientation="vertical" > 

     <TextView 
      android:id="@+id/townText" 
      android:layout_width="wrap_content" 
      android:layout_height="wrap_content" 
      android:text="Towns" 
      android:textAppearance="?android:attr/textAppearanceMedium" /> 

     <EditText 
      android:id="@+id/yellowTown" 
      android:layout_width="52dp" 
      android:layout_height="wrap_content" 
      android:ems="10" 
      android:inputType="number" /> 

     <EditText 
      android:id="@+id/greenTown" 
      android:layout_width="52dp" 
      android:layout_height="wrap_content" 
      android:ems="10" 
      android:inputType="number" /> 

     <EditText 
      android:id="@+id/brownTown" 
      android:layout_width="52dp" 
      android:layout_height="wrap_content" 
      android:ems="10" 
      android:inputType="number" /> 

     <android.support.v7.widget.Space 
      android:layout_width="wrap_content" 
      android:layout_height="wrap_content" /> 

     <TextView 
      android:id="@+id/textView2" 
      android:layout_width="wrap_content" 
      android:layout_height="wrap_content" 
      android:text="Cities" 
      android:textAppearance="?android:attr/textAppearanceMedium" /> 

     <EditText 
      android:id="@+id/yellowCity" 
      android:layout_width="52dp" 
      android:layout_height="wrap_content" 
      android:ems="10" 
      android:inputType="number" /> 

     <EditText 
      android:id="@+id/greenCity" 
      android:layout_width="52dp" 
      android:layout_height="wrap_content" 
      android:ems="10" 
      android:inputType="number" /> 

     <EditText 
      android:id="@+id/brownCity" 
      android:layout_width="52dp" 
      android:layout_height="wrap_content" 
      android:ems="10" 
      android:inputType="number" /> 

     <EditText 
      android:id="@+id/greyCity" 
      android:layout_width="52dp" 
      android:layout_height="wrap_content" 
      android:ems="10" 
      android:inputType="number" /> 

     <TextView 
      android:id="@+id/TextView01" 
      android:layout_width="wrap_content" 
      android:layout_height="wrap_content" 
      android:text="GC" 
      android:textAppearance="?android:attr/textAppearanceMedium" /> 

     <EditText 
      android:id="@+id/yellowGC" 
      android:layout_width="52dp" 
      android:layout_height="wrap_content" 
      android:ems="10" 
      android:inputType="number" /> 

     <EditText 
      android:id="@+id/greenGC" 
      android:layout_width="52dp" 
      android:layout_height="wrap_content" 
      android:ems="10" 
      android:inputType="number" /> 

     <EditText 
      android:id="@+id/brownGC" 
      android:layout_width="52dp" 
      android:layout_height="wrap_content" 
      android:ems="10" 
      android:inputType="number" /> 

     <EditText 
      android:id="@+id/greyGC" 
      android:layout_width="52dp" 
      android:layout_height="wrap_content" 
      android:ems="10" 
      android:inputType="number" /> 

     <TextView 
      android:id="@+id/TextView02" 
      android:layout_width="wrap_content" 
      android:layout_height="wrap_content" 
      android:text="Met" 
      android:textAppearance="?android:attr/textAppearanceMedium" /> 

     <EditText 
      android:id="@+id/yellowMet" 
      android:layout_width="52dp" 
      android:layout_height="wrap_content" 
      android:ems="10" 
      android:inputType="number" /> 

     <EditText 
      android:id="@+id/greenMet" 
      android:layout_width="52dp" 
      android:layout_height="wrap_content" 
      android:ems="10" 
      android:inputType="number" /> 

     <EditText 
      android:id="@+id/brownMet" 
      android:layout_width="52dp" 
      android:layout_height="wrap_content" 
      android:ems="10" 
      android:inputType="number" /> 

     <EditText 
      android:id="@+id/greyMet" 
      android:layout_width="52dp" 
      android:layout_height="wrap_content" 
      android:ems="10" 
      android:inputType="number" /> 

     <TextView 
      android:id="@+id/textView4" 
      android:layout_width="wrap_content" 
      android:layout_height="wrap_content" 
      android:textAppearance="?android:attr/textAppearanceLarge" /> 

     <Button 
      android:id="@+id/run" 
      android:layout_width="wrap_content" 
      android:layout_height="wrap_content" 
      android:onClick="run" 
      android:text="Run" /> 
    </TableLayout> 
</ScrollView>

그리고 더 구체적으로, 문제의 텍스트 뷰 :

<TextView 
      android:id="@+id/townText" 
      android:layout_width="wrap_content" 
      android:layout_height="wrap_content" 
      android:text="Towns" 
      android:textAppearance="?android:attr/textAppearanceMedium" />

편집 : 로그 캣 오류 : 나는 처리기를 사용하여 시도했다

04-23 09:50:18.881: E/AndroidRuntime(14665): FATAL EXCEPTION: main 
04-23 09:50:18.881: E/AndroidRuntime(14665): java.lang.RuntimeException: Unable to start activity 

    ComponentInfo{com.murrow.natlrevcalc/com.murrow.natlrevcalc.NationalActivity}: java.lang.NullPointerException 
04-23 09:50:18.881: E/AndroidRuntime(14665): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2295) 
04-23 09:50:18.881: E/AndroidRuntime(14665): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2349) 
04-23 09:50:18.881: E/AndroidRuntime(14665): at android.app.ActivityThread.access$700(ActivityThread.java:159) 
04-23 09:50:18.881: E/AndroidRuntime(14665): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1316) 
04-23 09:50:18.881: E/AndroidRuntime(14665): at android.os.Handler.dispatchMessage(Handler.java:99) 
04-23 09:50:18.881: E/AndroidRuntime(14665): at android.os.Looper.loop(Looper.java:137) 
04-23 09:50:18.881: E/AndroidRuntime(14665): at android.app.ActivityThread.main(ActivityThread.java:5419) 
04-23 09:50:18.881: E/AndroidRuntime(14665): at java.lang.reflect.Method.invokeNative(Native Method) 
04-23 09:50:18.881: E/AndroidRuntime(14665): at java.lang.reflect.Method.invoke(Method.java:525) 
04-23 09:50:18.881: E/AndroidRuntime(14665): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1187) 
04-23 09:50:18.881: E/AndroidRuntime(14665): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1003) 
04-23 09:50:18.881: E/AndroidRuntime(14665): at dalvik.system.NativeStart.main(Native Method) 
04-23 09:50:18.881: E/AndroidRuntime(14665): Caused by: java.lang.NullPointerException 
04-23 09:50:18.881: E/AndroidRuntime(14665): at com.murrow.natlrevcalc.NationalActivity.onCreate(NationalActivity.java:95) 
04-23 09:50:18.881: E/AndroidRuntime(14665): at android.app.Activity.performCreate(Activity.java:5372) 
04-23 09:50:18.881: E/AndroidRuntime(14665): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1104) 
04-23 09:50:18.881: E/AndroidRuntime(14665): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2257) 
04-23 09:50:18.881: E/AndroidRuntime(14665): ... 11 more

, 내가 사용하려고했습니다/쓰레드로 엉망진창. 나는이 사이트의 다른 게시물에서 발견 한 어떤 의미가없는 제안을 시도했다.

액티비티가 프래그먼트를 팽창시키기 때문에 (필자가 아는 한) 액티비티/프래그먼트 관계가 양호해야합니다.

도와주세요!

감사합니다.

출처

2014-04-23 Kymvaris

당신은

public class NationalFragment extends Fragment { 

    private OnItemSelectedListener listener; 

    @Override 
    public View onCreateView(LayoutInflater inflater, ViewGroup container, 
     Bundle savedInstanceState) { 
    View view = inflater.inflate(R.layout.activity_national, 
     container, false); 

TextView test = (TextView)view.findViewById(R.id.townText); 
    test.setText("This is not working"); 

    return view; 
    }

}

출처

2014-04-23 14:52:34 extmkv

내가 그것을 할 때 NationalFragment @ 방법 OnCreateView() 안에 텍스트 뷰 코드를 삽입해야합니다 반환 getView().findViewByIdonCreateView 후 사용할 수 있습니다 이 방법으로 Eclipse는 "연결할 수없는 코드"오류를 표시합니다. – Kymvaris

Activty and Fragment의 모든 코드를 지나쳐주십시오. – extmkv

전체 활동 및 단편 코드를 포함하도록 게시물을 편집했습니다. Eclipse가 더 이상 "연결할 수없는 코드"오류를 표시하지 않지만 앱이 여전히 충돌하고 있습니다. – Kymvaris

townText은 Fragment보기 계층 구조에 속합니다. Fragment 하위 클래스에서 찾아야합니다. 가장 좋은 장소는, 내 의견으로는 onViewCreated 콜백,하지만 당신은

출처

2014-04-23 14:48:38 Blackbelt

안드로이드 textView.setText() 응용 프로그램을 무력화

답변

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