Force close issue in Tabview

  • Replies:4
  • OpenNot stickiedUnanswered
  • Forum posts: 17

Nov 26, 2014 8:24:13 AM via Website

Hi friends,

Here is my code for tab view in my application.
My problem is when this activity starts the app force closes.
Please help me to sort out the issue

Java

package info.androidhive.slidingmenu.Tulip;

import info.androidhive.slidingmenu.Projects;
import android.app.TabActivity;
import android.content.Intent;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.View;
import android.widget.ImageView;
import android.widget.TabHost;

@SuppressWarnings("deprecation")
public class Tulip extends TabActivity{

static TabHost tabHost;
@SuppressWarnings("deprecation")
@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_tulip);
    setTab();

}
public void setTab(){

    addTab("Overview", R.drawable.overview_tab, Projects.class);
    addTab("Location Map", R.drawable.locationmap_tab, Projects.class);
    addTab("Amenities", R.drawable.amenities_tab, Projects.class);
    addTab("Specifications", R.drawable.specifications_tab, Projects.class);
    addTab("Plans", R.drawable.plans_tab, Projects.class);
    addTab("Apartment Plans", R.drawable.apartment_plans, Projects.class);
    addTab("E-brochure", R.drawable.ebrochure_tab, Projects.class);
}
private void addTab(String labelId, int drawableId, Class<?> c)
{
    tabHost = getTabHost();
    Intent intent = new Intent(this, c);
    TabHost.TabSpec spec = tabHost.newTabSpec("tab" + labelId); 
    View tabIndicator = LayoutInflater.from(this).inflate(R.layout.tab_indicator, getTabWidget(), false);
    ImageView icon = (ImageView) tabIndicator.findViewById(R.id.icon);
    icon.setImageResource(drawableId);

    spec.setIndicator(tabIndicator);
    spec.setContent(intent);
    tabHost.addTab(spec);
}

}

XML


android:id="@android:id/tabhost"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
>
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:orientation="vertical"
>

    <FrameLayout
        android:id="@android:id/tabcontent"
        android:layout_width="fill_parent"
        android:layout_height="fill_parent"
        android:layout_weight="1"
        />

    <TabWidget
        android:id="@android:id/tabs"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:tabStripEnabled="false"
        android:gravity="center"
        android:layout_weight="0" />
</LinearLayout>

Log cat

11-26 07:20:47.863: D/OpenGLRenderer(996): TextureCache::get: create texture(0xb78978a8): name, size, mSize = 55, 900, 2599480

11-26 07:20:49.435: D/AndroidRuntime(996): Shutting down VM
11-26 07:20:49.435: W/dalvikvm(996): threadid=1: thread exiting with uncaught exception (group=0xa62d2288)
11-26 07:20:49.439: E/AndroidRuntime(996): FATAL EXCEPTION: main
11-26 07:20:49.439: E/AndroidRuntime(996): java.lang.RuntimeException: Unable to start activity ComponentInfo{info.androidhive.CrescentBuilders/info.androidhive.slidingmenu.Tulip.Tulip}: java.lang.RuntimeException: Unable to start activity ComponentInfo{info.androidhive.CrescentBuilders/info.androidhive.slidingmenu.Projects}: java.lang.NullPointerException
11-26 07:20:49.439: E/AndroidRuntime(996): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2059)
11-26 07:20:49.439: E/AndroidRuntime(996): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2084)
11-26 07:20:49.439: E/AndroidRuntime(996): at android.app.ActivityThread.access$600(ActivityThread.java:130)
11-26 07:20:49.439: E/AndroidRuntime(996): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1195)
11-26 07:20:49.439: E/AndroidRuntime(996): at android.os.Handler.dispatchMessage(Handler.java:99)
11-26 07:20:49.439: E/AndroidRuntime(996): at android.os.Looper.loop(Looper.java:137)
11-26 07:20:49.439: E/AndroidRuntime(996): at android.app.ActivityThread.main(ActivityThread.java:4745)
11-26 07:20:49.439: E/AndroidRuntime(996): at java.lang.reflect.Method.invokeNative(Native Method)
11-26 07:20:49.439: E/AndroidRuntime(996): at java.lang.reflect.Method.invoke(Method.java:511)
11-26 07:20:49.439: E/AndroidRuntime(996): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:786)
11-26 07:20:49.439: E/AndroidRuntime(996): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:553)
11-26 07:20:49.439: E/AndroidRuntime(996): at dalvik.system.NativeStart.main(Native Method)
11-26 07:20:49.439: E/AndroidRuntime(996): Caused by: java.lang.RuntimeException: Unable to start activity ComponentInfo{info.androidhive.CrescentBuilders/info.androidhive.slidingmenu.Projects}: java.lang.NullPointerException
11-26 07:20:49.439: E/AndroidRuntime(996): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2059)
11-26 07:20:49.439: E/AndroidRuntime(996): at android.app.ActivityThread.startActivityNow(ActivityThread.java:1900)
11-26 07:20:49.439: E/AndroidRuntime(996): at android.app.LocalActivityManager.moveToState(LocalActivityManager.java:135)
11-26 07:20:49.439: E/AndroidRuntime(996): at android.app.LocalActivityManager.startActivity(LocalActivityManager.java:347)
11-26 07:20:49.439: E/AndroidRuntime(996): at android.widget.TabHost$IntentContentStrategy.getContentView(TabHost.java:694)
11-26 07:20:49.439: E/AndroidRuntime(996): at android.widget.TabHost.setCurrentTab(TabHost.java:358)
11-26 07:20:49.439: E/AndroidRuntime(996): at android.widget.TabHost.addTab(TabHost.java:236)
11-26 07:20:49.439: E/AndroidRuntime(996): at info.androidhive.slidingmenu.Tulip.Tulip.addTab(Tulip.java:47)
11-26 07:20:49.439: E/AndroidRuntime(996): at info.androidhive.slidingmenu.Tulip.Tulip.setTab(Tulip.java:28)
11-26 07:20:49.439: E/AndroidRuntime(996): at info.androidhive.slidingmenu.Tulip.Tulip.onCreate(Tulip.java:23)
11-26 07:20:49.439: E/AndroidRuntime(996): at android.app.Activity.performCreate(Activity.java:5008)
11-26 07:20:49.439: E/AndroidRuntime(996): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1079)
11-26 07:20:49.439: E/AndroidRuntime(996): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2023)
11-26 07:20:49.439: E/AndroidRuntime(996): ... 11 more
11-26 07:20:49.439: E/AndroidRuntime(996): Caused by: java.lang.NullPointerException
11-26 07:20:49.439: E/AndroidRuntime(996): at info.androidhive.slidingmenu.Projects.onCreate(Projects.java:31)
11-26 07:20:49.439: E/AndroidRuntime(996): at android.app.Activity.performCreate(Activity.java:5008)
11-26 07:20:49.439: E/AndroidRuntime(996): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1079)
11-26 07:20:49.439: E/AndroidRuntime(996): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2023)
11-26 07:20:49.439: E/AndroidRuntime(996): ... 23 more
11-26 07:20:50.567: I/Process(996): Sending signal. PID: 996 SIG: 9

  • Forum posts: 118

Nov 26, 2014 12:06:51 PM via Website

Could you post rule number 47? That's where it goes wrong.

  • Forum posts: 17

Nov 26, 2014 12:20:08 PM via Website

Dear Kevin Berendsen,
How can i find rule number 7?
Im a beginner in android.

  • Forum posts: 118

Nov 26, 2014 12:57:42 PM via Website

Ashfaq

Dear Kevin Berendsen,
How can i find rule number 7?
Im a beginner in android.

Nevermind.

Replace the following:

tabHost = getTabHost();

With this:

final TabHost tabHost = getTabHost();

See if that works.

Remove this line as well, it's bad practice to me:

@SuppressWarnings("deprecation")

— modified on Nov 26, 2014 12:59:16 PM

  • Forum posts: 17

Nov 26, 2014 1:54:57 PM via Website

Dear Kevin Berendsen,

Still the problem is there.
No changes.