TabHost에 대한 사양에 대해 다른 클래스를 설정하십시오

Question

사양에 다른 TabHost 클래스를 설정하려고하지만 일부 오류 (아래에 붙여 넣은 로그)가 있습니다 다른 탭에 대해 champ.setIndicator("Champion").setContent(R.id.tab1); 등을 변경하면 그것은 작동합니다. 누군가 나를 도울 수 있습니까? MY 코드 :

TabsMain.java

package com.girardi.lolguides; 

import android.os.Bundle; 
import android.app.Activity; 
import android.content.Intent; 
import android.view.Menu; 
import android.widget.TabHost; 
import android.widget.TabHost.TabSpec; 

public class TabsMain extends Activity { 

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

     TabHost tabHost = (TabHost) findViewById(R.id.tabhost); 
     tabHost.setup(); 
     TabSpec champ = tabHost.newTabSpec("champ"); 
     TabSpec equip = tabHost.newTabSpec("item"); 
     champ.setIndicator("Champion").setContent(new Intent(this, Champion.class)); 
     equip.setIndicator("Items").setContent(new Intent(this, Equip.class)); 
     tabHost.addTab(champ); 
     tabHost.addTab(equip); 
    } 

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

} 

Champion.java

package com.girardi.lolguides; 

import android.app.Activity; 
import android.os.Bundle; 
import android.widget.TextView; 

public class Champion extends Activity { 

    /** Called when the activity is first created. */ 
    @Override 
    public void onCreate(Bundle savedInstanceState) { 
     super.onCreate(savedInstanceState); 

     /* First Tab Content */ 
     TextView textView = new TextView(this); 
     textView.setText("First Tab"); 
     setContentView(textView); 

    } 
} 

Equip.java

package com.girardi.lolguides; 

import android.app.Activity; 
import android.os.Bundle; 
import android.widget.TextView; 

public class Equip extends Activity { 
    /** Called when the activity is first created. */ 
    @Override 
    public void onCreate(Bundle savedInstanceState) { 
     super.onCreate(savedInstanceState); 

     /* Second Tab Content */ 
     TextView textView = new TextView(this); 
     textView.setText("Second Tab"); 
     setContentView(textView); 

    } 
} 

activity_tabs_main.xml

<RelativeLayout 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:paddingBottom="@dimen/activity_vertical_margin" 
    android:paddingLeft="@dimen/activity_horizontal_margin" 
    android:paddingRight="@dimen/activity_horizontal_margin" 
    android:paddingTop="@dimen/activity_vertical_margin" 
    tools:context=".TabsMain" > 

    <TabHost 
     android:id="@+id/tabhost" 
     android:layout_width="match_parent" 
     android:layout_height="match_parent" 
     android:layout_alignParentLeft="true" 
     android:layout_alignParentTop="true" > 

     <LinearLayout 
      android:layout_width="match_parent" 
      android:layout_height="match_parent" 
      android:orientation="vertical" > 

      <TabWidget 
       android:id="@android:id/tabs" 
       android:layout_width="match_parent" 
       android:layout_height="wrap_content" > 
      </TabWidget> 

      <FrameLayout 
       android:id="@android:id/tabcontent" 
       android:layout_width="match_parent" 
       android:layout_height="match_parent" > 

       <LinearLayout 
        android:id="@+id/tab1" 
        android:layout_width="match_parent" 
        android:layout_height="match_parent" 
        android:orientation="horizontal"> 
       </LinearLayout> 

       <LinearLayout 
        android:id="@+id/tab2" 
        android:layout_width="match_parent" 
        android:layout_height="match_parent" 
        android:orientation="horizontal" > 
       </LinearLayout> 

       <LinearLayout 
        android:id="@+id/tab3" 
        android:layout_width="match_parent" 
        android:layout_height="match_parent" 
        android:orientation="horizontal"> 
       </LinearLayout> 
      </FrameLayout> 
     </LinearLayout> 
    </TabHost> 

</RelativeLayout> 

LOG :

05-20 13:51:22.890: D/AndroidRuntime(22816): Shutting down VM 
05-20 13:51:22.890: W/dalvikvm(22816): threadid=1: thread exiting with uncaught exception (group=0x40e832a0) 
05-20 13:51:22.910: E/AndroidRuntime(22816): FATAL EXCEPTION: main 
05-20 13:51:22.910: E/AndroidRuntime(22816): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.girardi.lolguides/com.girardi.lolguides.TabsMain}: java.lang.NullPointerException 
05-20 13:51:22.910: E/AndroidRuntime(22816): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2100) 
05-20 13:51:22.910: E/AndroidRuntime(22816): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2125) 
05-20 13:51:22.910: E/AndroidRuntime(22816): at android.app.ActivityThread.access$600(ActivityThread.java:140) 
05-20 13:51:22.910: E/AndroidRuntime(22816): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1227) 
05-20 13:51:22.910: E/AndroidRuntime(22816): at android.os.Handler.dispatchMessage(Handler.java:99) 
05-20 13:51:22.910: E/AndroidRuntime(22816): at android.os.Looper.loop(Looper.java:137) 
05-20 13:51:22.910: E/AndroidRuntime(22816): at android.app.ActivityThread.main(ActivityThread.java:4898) 
05-20 13:51:22.910: E/AndroidRuntime(22816): at java.lang.reflect.Method.invokeNative(Native Method) 
05-20 13:51:22.910: E/AndroidRuntime(22816): at java.lang.reflect.Method.invoke(Method.java:511) 
05-20 13:51:22.910: E/AndroidRuntime(22816): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1006) 
05-20 13:51:22.910: E/AndroidRuntime(22816): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:773) 
05-20 13:51:22.910: E/AndroidRuntime(22816): at dalvik.system.NativeStart.main(Native Method) 
05-20 13:51:22.910: E/AndroidRuntime(22816): Caused by: java.lang.NullPointerException 
05-20 13:51:22.910: E/AndroidRuntime(22816): at android.widget.TabHost.addTab(TabHost.java:243) 
05-20 13:51:22.910: E/AndroidRuntime(22816): at com.girardi.lolguides.TabsMain.onCreate(TabsMain.java:23) 
05-20 13:51:22.910: E/AndroidRuntime(22816): at android.app.Activity.performCreate(Activity.java:5206) 
05-20 13:51:22.910: E/AndroidRuntime(22816): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1083) 
05-20 13:51:22.910: E/AndroidRuntime(22816): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2064) 
05-20 13:51:22.910: E/AndroidRuntime(22816): ... 11 more 
05-20 13:53:10.655: D/AndroidRuntime(24134): Shutting down VM 
05-20 13:53:10.655: W/dalvikvm(24134): threadid=1: thread exiting with uncaught exception (group=0x40e832a0) 
05-20 13:53:10.665: E/AndroidRuntime(24134): FATAL EXCEPTION: main 
05-20 13:53:10.665: E/AndroidRuntime(24134): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.girardi.lolguides/com.girardi.lolguides.TabsMain}: java.lang.NullPointerException 
05-20 13:53:10.665: E/AndroidRuntime(24134): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2100) 
05-20 13:53:10.665: E/AndroidRuntime(24134): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2125) 
05-20 13:53:10.665: E/AndroidRuntime(24134): at android.app.ActivityThread.access$600(ActivityThread.java:140) 
05-20 13:53:10.665: E/AndroidRuntime(24134): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1227) 
05-20 13:53:10.665: E/AndroidRuntime(24134): at android.os.Handler.dispatchMessage(Handler.java:99) 
05-20 13:53:10.665: E/AndroidRuntime(24134): at android.os.Looper.loop(Looper.java:137) 
05-20 13:53:10.665: E/AndroidRuntime(24134): at android.app.ActivityThread.main(ActivityThread.java:4898) 
05-20 13:53:10.665: E/AndroidRuntime(24134): at java.lang.reflect.Method.invokeNative(Native Method) 
05-20 13:53:10.665: E/AndroidRuntime(24134): at java.lang.reflect.Method.invoke(Method.java:511) 
05-20 13:53:10.665: E/AndroidRuntime(24134): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1006) 
05-20 13:53:10.665: E/AndroidRuntime(24134): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:773) 
05-20 13:53:10.665: E/AndroidRuntime(24134): at dalvik.system.NativeStart.main(Native Method) 
05-20 13:53:10.665: E/AndroidRuntime(24134): Caused by: java.lang.NullPointerException 
05-20 13:53:10.665: E/AndroidRuntime(24134): at com.girardi.lolguides.TabsMain.onCreate(TabsMain.java:19) 
05-20 13:53:10.665: E/AndroidRuntime(24134): at android.app.Activity.performCreate(Activity.java:5206) 
05-20 13:53:10.665: E/AndroidRuntime(24134): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1083) 
05-20 13:53:10.665: E/AndroidRuntime(24134): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2064) 
05-20 13:53:10.665: E/AndroidRuntime(24134): ... 11 more 

Answer 1

귀하의 활동 (지원되지 않습니다) TabActivity를 확장하거나 탭을 사용 (오른쪽 방법입니다) 조각을 사용해야합니다. 자세한 내용 및 예는 TabActivity을 참조하십시오.

편집 :

activity_main.xml MainActivity에 대해

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" 
    android:layout_width="fill_parent" 
    android:layout_height="fill_parent"> 
    <ListView android:id="@+id/list" 
     android:layout_alignParentBottom="true" 
     android:layout_width="fill_parent" 
     android:layout_height="wrap_content"/> 
    <android.support.v4.app.TabHost 
     android:id="@android:id/tabhost" 
     android:layout_width="fill_parent" 
     android:layout_height="wrap_content" 
     android:layout_above="@+id/footerlist" 
     android:layout_alignParentTop="true"> 
     <LinearLayout 
      android:orientation="vertical" 
      android:layout_width="fill_parent" 
      android:layout_height="fill_parent"> 
      <TabWidget 
       android:id="@android:id/tabs" 
       android:orientation="horizontal" 
       android:layout_width="match_parent" 
       android:layout_height="wrap_content" 
       android:layout_weight="0"/> 
      <FrameLayout 
       android:id="@android:id/tabcontent" 
       android:layout_width="0dp" 
       android:layout_height="0dp" 
       android:layout_weight="0"/> 
      <FrameLayout 
       android:id="@+id/realtabcontent" 
       android:layout_width="match_parent" 
       android:layout_height="0dp" 
       android:layout_weight="1"/> 
     </LinearLayout> 
    </TabHost> 
</RelativeLayout> 

: 레이아웃에 대해이 같은 RelativeLayout의를 사용할 수 있습니다

public class MainActivity extends android.support.v4.app.FragmentActivity { 
    private android.support.v4.app.FragmentTabHost mTabHost; 

    @Override 
    protected void onCreate(Bundle savedInstanceState) { 
     super.onCreate(savedInstanceState); 

     setContentView(R.layout.activity_main); 
     mTabHost = (FragmentTabHost)findViewById(android.R.id.tabhost); 
     mTabHost.setup(this, getSupportFragmentManager(), R.id.realtabcontent); 

     mTabHost.addTab(...); 
    } 
}