I'm currently developing an application for Android which needs to use a custom made Tabs. I have encountered two problems:
I will start from my first problem:
java.lang.NullPointerException
at android.widget.TabWidget.initTabWidget(TabWidget.java:115)
at android.widget.TabWidget.<init>(TabWidget.java:86)
at android.widget.TabWidget.<init>(TabWidget.java:69)
...
I'm getting this exception when i want to switch from a text mode to wyswig mode in Eclipse. This is the actual xml code that gives me that error:
<?xml version="1.0" encoding="utf-8"?>
<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">
<FrameLayout android:id="@android:id/tabcontent"
android:layout_width="fill_parent"
android:layout_height="0dip"
android:layout_weight="1"
android:padding="20dip"
android:background="#fff" />
<RadioGroup android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:orientation="horizontal"
android:checkedButton="@+id/first"
android:id="@+id/states">
<RadioButton android:id="@+id/first"
android:background="#FF00FF"
android:width="80dip"
android:height="70dip" />
<RadioButton android:id="@+id/second"
android:background="#FFFFFF"
android:width="80dip"
android:height="70dip" />
<RadioButton android:id="@+id/third"
android:background="#00FFFF"
android:width="80dip"
android:height="70dip" />
<RadioButton android:id="@+id/fourth"
android:background="#0000FF"
android:width="80dip"
android:height="70dip" />
</RadioGroup>
<TabWidget android:id="@android:id/tabs"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_weight="0"
android:visibility="gone" />
</LinearLayout>
</TabHost>
Now the second problem is an Graphic-Artifact:
How can i resolve my problems?
I have managed to fix what i though was a visual-artifact:
<FrameLayout android:id="@android:id/tabcontent"
android:layout_width="fill_parent" android:layout_height="fill_parent"
android:layout_weight="1" android:background="#FFFFFF" />
also it seems that whenever i use TabHost and TabWidget in my projects i'm getting that exception, also i have checked it on android tutorials: http://developer.android.com/resources/tutorials/views/hello-tabwidget.html and yes i have got it too