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POnullpointerexception in wyswig xml layout in eclipse for android and visual-artifacts
 

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    <p>I'm currently developing an application for Android which needs to use a custom made Tabs. I have encountered two problems:</p> <p>I will start from my first problem:</p> <pre><code>java.lang.NullPointerException at android.widget.TabWidget.initTabWidget(TabWidget.java:115) at android.widget.TabWidget.&lt;init&gt;(TabWidget.java:86) at android.widget.TabWidget.&lt;init&gt;(TabWidget.java:69) ... </code></pre> <p>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:</p> <pre><code>&lt;?xml version="1.0" encoding="utf-8"?&gt; &lt;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"&gt; &lt;LinearLayout android:orientation="vertical" android:layout_width="fill_parent" android:layout_height="fill_parent"&gt; &lt;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" /&gt; &lt;RadioGroup android:layout_width="fill_parent" android:layout_height="wrap_content" android:orientation="horizontal" android:checkedButton="@+id/first" android:id="@+id/states"&gt; &lt;RadioButton android:id="@+id/first" android:background="#FF00FF" android:width="80dip" android:height="70dip" /&gt; &lt;RadioButton android:id="@+id/second" android:background="#FFFFFF" android:width="80dip" android:height="70dip" /&gt; &lt;RadioButton android:id="@+id/third" android:background="#00FFFF" android:width="80dip" android:height="70dip" /&gt; &lt;RadioButton android:id="@+id/fourth" android:background="#0000FF" android:width="80dip" android:height="70dip" /&gt; &lt;/RadioGroup&gt; &lt;TabWidget android:id="@android:id/tabs" android:layout_width="fill_parent" android:layout_height="wrap_content" android:layout_weight="0" android:visibility="gone" /&gt; &lt;/LinearLayout&gt; &lt;/TabHost&gt; </code></pre> <p>Now the second problem is an Graphic-Artifact: <img src="https://i.stack.imgur.com/lJcmQ.png" alt="http://img529.imageshack.us/img529/8216/99725485.png"></p> <p>How can i resolve my problems?</p>
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