Getting nullpointer exception when adding tabs?

Question

Hi when i am trying to add tabs i am getting nullpointer exception.I am creating one activity MyLanguageActivity this extends Activity and i am creating one more activity MyTabActivity this extends TabActivity.Inside of MyLangugeActivity i am selecting language and i am tapping on done button i am adding tabs one more time like this :

public void setTabs(){
Intent intent, intent1, intent2, intent3;
    TabHost tabHost = MyTabActivity.tabHost;
    System.out.println(tabHost);
    TextView tv;
    intent = new Intent(
            "com.activitygroups.RequestTabActivtyGroup");
    intent1 = new Intent(
            "com.activitygroups.OffersTabActivityGroup");

    intent.putExtra("content", "requests");
    intent1.putExtra("content", "offers");


    System.out.println("request string : "
            + getResources().getString(R.string.requests));
    System.out.println("drowable id : "
            + getResources().getDrawable(R.drawable.request_tab_selector));

    tabHost.addTab(tabHost
            .newTabSpec("request_tab")
            .setIndicator(
                    LanguageUtils.getLanguage(MyLanguageActivity.this,
                            getResources().getString(R.string.requests)),
                    getResources().getDrawable(
                            R.drawable.request_tab_selector))
            .setContent(
                    new Intent(intent)
                            .addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP)));

}

inside og done button onclick i am calling this method.When i tap on done i am getting nullpointer exception.. My logcat here :

02-10 12:32:37.112: E/AndroidRuntime(5560): FATAL EXCEPTION: main
02-10 12:32:37.112: E/AndroidRuntime(5560): java.lang.NullPointerException
02-10 12:32:37.112: E/AndroidRuntime(5560):     at         android.widget.TabWidget.setCurrentTab(TabWidget.java:339)
02-10 12:32:37.112: E/AndroidRuntime(5560):     at android.widget.TabWidget.focusCurrentTab(TabWidget.java:363)
02-10 12:32:37.112: E/AndroidRuntime(5560):     at android.widget.TabHost.setCurrentTab(TabHost.java:320)
02-10 12:32:37.112: E/AndroidRuntime(5560):     at android.widget.TabHost.addTab(TabHost.java:213)
02-10 12:32:37.112: E/AndroidRuntime(5560):     at com.melhoroferta.LanguageSettingActivity.setUpTabs(MyLanguageActivity.java:204)
02-10 12:32:37.112: E/AndroidRuntime(5560):     at com.melhoroferta.LanguageSettingActivity.onClick(MyLanguageActivity.java:142)
02-10 12:32:37.112: E/AndroidRuntime(5560):     at android.view.View.performClick(View.java:2408)
02-10 12:32:37.112: E/AndroidRuntime(5560):     at android.view.View$PerformClick.run(View.java:8818)
02-10 12:32:37.112: E/AndroidRuntime(5560):     at   android.os.Handler.handleCallback(Handler.java:587)
  02-10 12:32:37.112: E/AndroidRuntime(5560):   at android.os.Handler.dispatchMessage(Handler.java:92)
        02-10 12:32:37.112: E/AndroidRuntime(5560):     at android.os.Looper.loop(Looper.java:123)
         02-10 12:32:37.112: E/AndroidRuntime(5560):    at android.app.ActivityThread.main(ActivityThread.java:4627)
          02-10 12:32:37.112: E/AndroidRuntime(5560):   at java.lang.reflect.Method.invokeNative(Native Method)
  02-10 12:32:37.112: E/AndroidRuntime(5560):   at java.lang.reflect.Method.invoke(Method.java:521)
   02-10 12:32:37.112: E/AndroidRuntime(5560):  at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:871)
   02-10 12:32:37.112: E/AndroidRuntime(5560):  at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:629)
        02-10 12:32:37.112: E/AndroidRuntime(5560):     at dalvik.system.NativeStart.main(Native Method)

Sorry guys i am forgot to remove those intent 2 and intent 3 actually this intents are i am not using..

Hello Rajesh, nullpointerexception bcaz of not created objects of intent2,intent3. — Amol Sawant
– Amol Sawant, Commented Feb 10, 2014 at 7:28
Rajesh as @AmolSawant96Kuli said your Intents are not init..that too you are not using it anywhere why you need it.. — kalyan pvs
– kalyan pvs, Commented Feb 10, 2014 at 7:32
please check my edit.i am not using this intent 2 and intent 3.sorry i forgot to remove this intents.I am getting exceptions in tabhost.addTab(...) in this line.. — Android_dev
– Android_dev, Commented Feb 10, 2014 at 7:59

Amol Sawant · Accepted Answer · 2014-02-10 07:32:31Z

4

 intent = new Intent(
            "com.activitygroups.RequestTabActivtyGroup");
 intent1 = new Intent(
            "com.activitygroups.OffersTabActivityGroup");

Add Intents,

 intent2 = new Intent(
            "profile activity");
 intent3 = new Intent(
            "setting activity");

answered Feb 10, 2014 at 7:32

Amol Sawant

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2 Comments

Android_dev Over a year ago

please check my edit.i am not using this intent 2 and intent 3.sorry i forgot to remove this intents.I am getting exceptions in tabhost.addTab(...) in this line..

Amol Sawant Over a year ago

might be problem with this. setContent(new Intent(intent) .addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP))); try to replace with .setContent(intent.addFlag(Intent.FLAG_ACTIVITY_CLEAR_TOP));

Fraggles · Accepted Answer · 2014-02-10 07:32:02Z

0

You have to initialize your intent2 and intent3.Because you use .putExtra to 2 not initialized Intents

Just add:

intent2 = new Intent(); //put in the brackets what you want or need
intent3 = new Intent();

answered Feb 10, 2014 at 7:32

Fraggles

4734 silver badges20 bronze badges

1 Comment

Android_dev Over a year ago

please check my edit.i am not using this intent 2 and intent 3.sorry i forgot to remove this intents.I am getting exceptions in tabhost.addTab(...) in this line..

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