tablayout 활동을 열면 내 앱이 다운 됨

this 튜토리얼을 따라 안드로이드 애플리케이션에 탭 레이아웃을 구현했습니다. 나는 이미 기존의 안드로이드 앱을 가지고 있기 때문에 튜토리얼을 약간 조정해야했다. 나는 내가하는 것처럼 정확히 모든 것을했는지 확신하지만, 탭 레이아웃 활동을 열기로되어있는 버튼을 클릭 할 때마다 내 앱이 다운된다.tablayout 활동을 열면 내 앱이 다운 됨

홈페이지 tabLayout 활동 :

public class Bifrosttabs extends TabActivity { 

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

    TabHost tabHost = getTabHost(); 

    //CRAFTING TAB 
    TabSpec craftTabSpec = tabHost.newTabSpec("Crafting"); 
    craftTabSpec.setIndicator("Crafting", getResources().getDrawable(R.drawable.weaponsmith_logo)); 
    Intent craftIntent = new Intent(this, Bifrost.class); 
    craftTabSpec.setContent(craftIntent); 

    //ADDITION INFO TAB 
    TabSpec infoTabSpec = tabHost.newTabSpec("Info"); 
    infoTabSpec.setIndicator("Info", getResources().getDrawable(R.drawable.craft_info)); 
    Intent infoIntent = new Intent(this, Bifrostinfo.class); 
    infoTabSpec.setContent(infoIntent); 

    tabHost.addTab(craftTabSpec); 
    tabHost.addTab(infoTabSpec); 
}

홈페이지 tabLayout 활동 XML 파일 :

<TabHost xmlns:android="http://schemas.android.com/apk/res/android" 
android:id="@android:id/tabhost" 
android:layout_width="fill_parent" 
android:layout_height="fill_parent"> 
<LinearLayout 
    android:orientation="vertical" 
    android:layout_width="fill_parent" 
    android:layout_height="fill_parent"> 
    <TabWidget 
     android:id="@android:id/tabs" 
     android:layout_width="fill_parent" 
     android:layout_height="wrap_content" /> 
    <FrameLayout 
     android:id="@android:id/tabcontent" 
     android:layout_width="fill_parent" 
     android:layout_height="fill_parent"/> 
</LinearLayout>

탭 레이아웃 활동을 엽니 다

버튼 방법 :

public void onClick (View v){ 
    switch (v.getId()){ 
    case R.id.button1: 
     Intent bifrost = new Intent (MainActivity.this, Bifrosttabs.class); 
     startActivity(bifrost); 
     break; 
...rest of the code for other buttons

ㅁ 로그인 로그 파일 :

07-15 17:57:00.084: E/jdwp(14846): Failed writing handshake bytes: Broken pipe (-1 of 14) 
07-15 17:57:06.186: E/AndroidRuntime(14846): FATAL EXCEPTION: main 
07-15 17:57:06.186: E/AndroidRuntime(14846): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.matthewstudios.gw2legendary/com.example.gw2legendary.tablayouts.Bifrosttabs}: java.lang.RuntimeException: Unable to start activity ComponentInfo{com.matthewstudios.gw2legendary/com.example.gw2legendary.craftingactivities.Bifrost}: java.lang.NullPointerException 
07-15 17:57:06.186: E/AndroidRuntime(14846): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2180) 
07-15 17:57:06.186: E/AndroidRuntime(14846): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2230) 
07-15 17:57:06.186: E/AndroidRuntime(14846): at android.app.ActivityThread.access$600(ActivityThread.java:141) 
07-15 17:57:06.186: E/AndroidRuntime(14846): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1234) 
07-15 17:57:06.186: E/AndroidRuntime(14846): at android.os.Handler.dispatchMessage(Handler.java:99) 
07-15 17:57:06.186: E/AndroidRuntime(14846): at android.os.Looper.loop(Looper.java:137) 
07-15 17:57:06.186: E/AndroidRuntime(14846): at android.app.ActivityThread.main(ActivityThread.java:5041) 
07-15 17:57:06.186: E/AndroidRuntime(14846): at java.lang.reflect.Method.invokeNative(Native Method) 
07-15 17:57:06.186: E/AndroidRuntime(14846): at java.lang.reflect.Method.invoke(Method.java:511) 
07-15 17:57:06.186: E/AndroidRuntime(14846): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:793) 
07-15 17:57:06.186: E/AndroidRuntime(14846): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:560) 
07-15 17:57:06.186: E/AndroidRuntime(14846): at dalvik.system.NativeStart.main(Native Method) 
07-15 17:57:06.186: E/AndroidRuntime(14846): Caused by: java.lang.RuntimeException: Unable to start activity ComponentInfo{com.matthewstudios.gw2legendary/com.example.gw2legendary.craftingactivities.Bifrost}: java.lang.NullPointerException 
07-15 17:57:06.186: E/AndroidRuntime(14846): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2180) 
07-15 17:57:06.186: E/AndroidRuntime(14846): at android.app.ActivityThread.startActivityNow(ActivityThread.java:2023) 
07-15 17:57:06.186: E/AndroidRuntime(14846): at android.app.LocalActivityManager.moveToState(LocalActivityManager.java:135) 
07-15 17:57:06.186: E/AndroidRuntime(14846): at android.app.LocalActivityManager.startActivity(LocalActivityManager.java:347) 
07-15 17:57:06.186: E/AndroidRuntime(14846): at android.widget.TabHost$IntentContentStrategy.getContentView(TabHost.java:749) 
07-15 17:57:06.186: E/AndroidRuntime(14846): at android.widget.TabHost.setCurrentTab(TabHost.java:413) 
07-15 17:57:06.186: E/AndroidRuntime(14846): at android.widget.TabHost.addTab(TabHost.java:240) 
07-15 17:57:06.186: E/AndroidRuntime(14846): at com.example.gw2legendary.tablayouts.Bifrosttabs.onCreate(Bifrosttabs.java:34) 
07-15 17:57:06.186: E/AndroidRuntime(14846): at android.app.Activity.performCreate(Activity.java:5104) 
07-15 17:57:06.186: E/AndroidRuntime(14846): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1080) 
07-15 17:57:06.186: E/AndroidRuntime(14846): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2144) 
07-15 17:57:06.186: E/AndroidRuntime(14846): ... 11 more 
07-15 17:57:06.186: E/AndroidRuntime(14846): Caused by: java.lang.NullPointerException 
07-15 17:57:06.186: E/AndroidRuntime(14846): at com.example.gw2legendary.craftingactivities.Bifrost.onCreate(Bifrost.java:160) 
07-15 17:57:06.186: E/AndroidRuntime(14846): at android.app.Activity.performCreate(Activity.java:5104) 
07-15 17:57:06.186: E/AndroidRuntime(14846): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1080) 
07-15 17:57:06.186: E/AndroidRuntime(14846): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2144) 
07-15 17:57:06.186: E/AndroidRuntime(14846): ... 21 more 
07-15 17:57:14.967: E/fb4a(:<default>):MmsConfig(14952): MmsConfig.loadMmsSettings mms_config.xml missing uaProfUrl setting

나는 여러분에게 줄 수있는 중요한 코드를 모두 알려 드렸습니다. 내가 아무 것도 잊어 버렸다면 알려주세요.

출처

2013-07-15 Guy

logcat에서 NullPointerException 다음에 오는 것은 무엇입니까? 문제가있는 곳에서 가장 가능성이 높습니다 – CodingIntrigue

@ Blade0rz 방금 전체 logcat 파일을 붙여 넣었습니다. 내 편집을 확인하십시오 – Guy

Bifrost 클래스의 행 번호 160에 오류가 있습니다. 일부 변수를 시작하지 않았습니다. – Laksh

덕분에 this user 덕분에 알아 냈습니다! 내 수업 bifrost의 160 번째 줄에 뭔가 잘못되었습니다.

ActionBar actionBar = getActionBar(); 
actionBar.setDisplayHomeAsUpEnabled(true);

이 두 줄로 인해 모든 문제가 발생했습니다. 탭 레이아웃이있는 경우 작업 표시 줄을 활성화 할 수 없습니다.

출처

2013-07-15 20:13:57 Guy

tablayout 활동을 열면 내 앱이 다운 됨

답변

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