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POIs it possible to check if a specific "TAB" in TabWidget is visible in current View or not?
 

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  1. POIs it possible to check if a specific "TAB" in TabWidget is visible in current View or not?
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    <p>I have a <code>TabWidget</code> with 5 tabs in it. <strong>Tabs</strong> : "One","Two","Three","Four","Five". The <code>TabHost</code> is in a <code>HorizontalScrollView</code>. Now I've one arrow (&lt; and >) each on each side of the <code>TabWidget</code> to indicate that there are more tabs in that direction(which are currently not visible in view). </p> <p>Now what I want to do is, if the first tab is not visible(<strong>in current view</strong>) then the arrow to left (&lt;) should be visible and if the last tab is not visible(<strong>in current view</strong>) then the arrow to right should be visible and if both tabs are not visible(<strong>in current view</strong>) then both arrows should be visible. I tried doing it with:</p> <pre><code>if (horizontablscrollview.getLeft == 0) { arrowRight.setVisiblity(View.VISIBLE) arrowLeft.setVisiblity(View.INVISIBLE) } else if( horizontablscrollview.getRight == 0) { arrowLeft.setVisiblity(View.VISIBLE) arrowRight.setVisiblity(View.INVISIBLE) } else if ( horizontablscrollview.getRight == 0 &amp;&amp; horizontablscrollview.getLeft == 0) { arrowRight.setVisiblity(View.VISIBLE) arrowLeft.setVisiblity(View.VISIBLE) } </code></pre> <p>But this doesn't work, my both tabs are invisible in the start:</p> <p><strong>my xml looks like this..</strong></p> <pre><code>&lt;?xml version="1.0" encoding="utf-8"?&gt; &lt;RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="fill_parent" android:layout_height="fill_parent" android:background="#ffffff" &gt; &lt;RelativeLayout android:id="@+id/RL_Header" android:layout_width="fill_parent" android:layout_height="50dip" android:layout_marginBottom="3dip" android:background="@drawable/gradient" &gt; &lt;ImageButton android:id="@+id/btn_Home" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_centerVertical="true" android:layout_marginLeft="3dp" android:background="@android:color/transparent" android:contentDescription="@string/description_home" android:onClick="onHomeButtonClick" android:src="@drawable/title_home" /&gt; &lt;ImageButton android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_alignParentRight="true" android:layout_centerVertical="true" android:layout_marginRight="5dip" android:layout_marginTop="5dip" android:background="@android:color/transparent" android:contentDescription="@string/description_about" android:onClick="onClickAbout" android:src="@drawable/title_about" /&gt; &lt;/RelativeLayout&gt; &lt;RelativeLayout android:id="@+id/FL_Tabs" android:layout_width="fill_parent" android:layout_height="wrap_content" android:layout_below="@id/RL_Header" &gt; &lt;/RelativeLayout&gt; &lt;RelativeLayout android:id="@+id/FL_Tabs" android:layout_width="fill_parent" android:layout_height="wrap_content" android:layout_below="@id/RL_Header" &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" android:background="#ffffff" &gt; &lt;ImageView android:id="@+id/arrow_left" android:layout_width="wrap_content" android:layout_height="wrap_content" android:src="@drawable/i_button" android:layout_alignParentLeft="true"/&gt; &lt;RelativeLayout android:id="@+id/rl_tabs" android:layout_width="wrap_content" android:layout_height="wrap_content" &gt; &lt;ImageView android:id="@+id/arrow_left" android:layout_width="wrap_content" android:layout_height="wrap_content" android:src="@drawable/i_button" android:layout_alignParentLeft="true" android:visibility="invisible"/&gt; &lt;ImageView android:id="@+id/arrow_Right" android:layout_width="wrap_content" android:layout_height="wrap_content" android:src="@drawable/i_button" android:layout_alignParentRight="true" android:visibility="invisible"/&gt; &lt;HorizontalScrollView android:id="@+id/my_scrollView" android:layout_width="fill_parent" android:layout_height="wrap_content" android:fillViewport="true" android:scrollbars="none" android:layout_toRightOf="@+id/arrow_left" android:layout_toLeftOf="@+id/arrow_Right"&gt; &lt;TabWidget android:id="@android:id/tabs" android:layout_width="fill_parent" android:layout_height="wrap_content" android:tabStripEnabled="true"/&gt; &lt;/HorizontalScrollView&gt; &lt;/RelativeLayout&gt; &lt;FrameLayout android:id="@android:id/tabcontent" android:layout_width="fill_parent" android:layout_height="wrap_content" android:paddingTop="65dip" &gt; &lt;RelativeLayout android:id="@+id/myTabContent" android:layout_width="fill_parent" android:layout_height="wrap_content" android:layout_marginTop="50dip" &gt; &lt;TableLayout android:id="@+id/tabSubs" android:layout_width="match_parent" android:layout_height="wrap_content" android:background="#ffffff" android:shrinkColumns="*" android:stretchColumns="*" &gt; &lt;TableRow android:layout_width="fill_parent" android:layout_height="wrap_content" android:layout_marginBottom="20dip" android:layout_marginTop="20dip" android:gravity="center_horizontal" &gt; &lt;Button android:id="@+id/btntestno1" android:layout_weight="1" android:gravity="center" android:padding="20dip" android:text="Test 1" android:textColor="#000000" /&gt; &lt;Button android:id="@+id/btntestno2" android:layout_weight="1" android:gravity="center" android:padding="20dip" android:text="Test 2" android:textColor="#000000" /&gt; &lt;/TableRow&gt; &lt;TableRow android:layout_width="fill_parent" android:layout_height="wrap_content" android:layout_marginBottom="20dip" android:gravity="center_horizontal" &gt; &lt;Button android:id="@+id/btntestno3" android:layout_weight="1" android:gravity="center" android:padding="20dip" android:text="Test 3" android:textColor="#000000" /&gt; &lt;Button android:id="@+id/btntestno4" android:layout_weight="1" android:gravity="center" android:padding="20dip" android:text="Test 4" android:textColor="#000000" /&gt; &lt;/TableRow&gt; &lt;TableRow android:layout_width="fill_parent" android:layout_height="wrap_content" android:layout_marginBottom="20dip" android:gravity="center_horizontal" &gt; &lt;Button android:id="@+id/btntestno5" android:layout_weight="1" android:gravity="center" android:padding="20dip" android:text="Test 5" android:textColor="#000000" /&gt; &lt;Button android:id="@+id/btntestno6" android:layout_weight="1" android:gravity="center" android:padding="20dip" android:text="Test 6" android:textColor="#000000" /&gt; &lt;/TableRow&gt; &lt;/TableLayout&gt; &lt;/RelativeLayout&gt; &lt;/FrameLayout&gt; &lt;/TabHost&gt; &lt;/RelativeLayout&gt; &lt;/RelativeLayout&gt; </code></pre> <p>Any help would be greatly appreciated.</p>
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