I am trying to create a an alphabetical scrollview to be diplayed on the right side of a listview to enable quick scrolling.i have done as instructed from this question How to create an alphabetical scrollbar displaying all the letter in android?
i have followed the above steps but on clicking the letters nothing happens,kindly assist.here's my code
java
public void quickScroll(View v) {
String firstLetter = (String) v.getTag();
int index = 0;
List<String> s=Arrays.asList("A","B","C","D","E","F","G","H","I","J","K","L","M","N","O",
"P","Q","R","S","T","U","V","W","X","Y","Z");
if (s != null) {
for (String string : s) {
if (string.startsWith(firstLetter)) {
index = s.indexOf(string);
break;
}
}
}
lv.setSelectionFromTop(index, 0);
//lv is my listview
}
and the xml below:
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context=".MainActivity" >
<ListView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_above="@+id/button1"
android:id="@+id/lv"/>
<LinearLayout android:orientation="vertical"
android:layout_width="wrap_content" android:layout_height="wrap_content"
android:layout_alignParentRight="true" android:background="@android:color/transparent" >
<TextView
android:layout_width="match_parent" android:layout_height="match_parent"
android:id="@+id/A" android:text="A" android:tag="A"
android:clickable="true" android:onClick="quickScroll"
/>
<TextView
android:layout_width="match_parent" android:layout_height="match_parent"
android:id="@+id/B" android:text="B" android:tag="B"
android:clickable="true" android:onClick="quickScroll"
/>
<TextView
android:layout_width="match_parent" android:layout_height="match_parent"
android:id="@+id/C" android:text="C" android:tag="C"
android:clickable="true" android:onClick="quickScroll"
/>
<TextView
android:layout_width="match_parent" android:layout_height="match_parent"
android:id="@+id/D" android:text="D" android:tag="D"
android:clickable="true" android:onClick="quickScroll"
/>
<TextView
android:layout_width="match_parent" android:layout_height="match_parent"
android:id="@+id/E" android:text="E" android:tag="E"
android:clickable="true" android:onClick="quickScroll"
/>
<TextView
android:layout_width="match_parent" android:layout_height="match_parent"
android:id="@+id/F" android:text="F" android:tag="F"
android:clickable="true" android:onClick="quickScroll"
/>
<TextView
android:layout_width="match_parent" android:layout_height="match_parent"
android:id="@+id/G" android:text="G" android:tag="G"
android:clickable="true" android:onClick="quickScroll"
/>
<TextView
android:layout_width="match_parent" android:layout_height="match_parent"
android:id="@+id/H" android:text="H" android:tag="H"
android:clickable="true" android:onClick="quickScroll"
/>
<TextView
android:layout_width="match_parent" android:layout_height="match_parent"
android:id="@+id/I" android:text="I" android:tag="I"
android:clickable="true" android:onClick="quickScroll"
/>
<TextView
android:layout_width="match_parent" android:layout_height="match_parent"
android:id="@+id/J" android:text="J" android:tag="J"
android:clickable="true" android:onClick="quickScroll"
/>
<TextView
android:layout_width="match_parent" android:layout_height="match_parent"
android:id="@+id/K" android:text="K" android:tag="K"
android:clickable="true" android:onClick="quickScroll"
/>
<TextView
android:layout_width="match_parent" android:layout_height="match_parent"
android:id="@+id/L" android:text="L" android:tag="L"
android:clickable="true" android:onClick="quickScroll"
/>
<TextView
android:layout_width="match_parent" android:layout_height="match_parent"
android:id="@+id/M" android:text="M" android:tag="M"
android:clickable="true" android:onClick="quickScroll"
/>
<TextView
android:layout_width="match_parent" android:layout_height="match_parent"
android:id="@+id/N" android:text="N" android:tag="N"
android:clickable="true" android:onClick="quickScroll"
/>
<TextView
android:layout_width="match_parent" android:layout_height="match_parent"
android:id="@+id/O" android:text="O" android:tag="O"
android:clickable="true" android:onClick="quickScroll"
/>
<TextView
android:layout_width="match_parent" android:layout_height="match_parent"
android:id="@+id/P" android:text="P" android:tag="P"
android:clickable="true" android:onClick="quickScroll"
/>
<TextView
android:layout_width="match_parent" android:layout_height="match_parent"
android:id="@+id/Q" android:text="Q" android:tag="Q"
android:clickable="true" android:onClick="quickScroll"
/>
<TextView
android:layout_width="match_parent" android:layout_height="match_parent"
android:id="@+id/R" android:text="R" android:tag="R"
android:clickable="true" android:onClick="quickScroll"
/>
<TextView
android:layout_width="match_parent" android:layout_height="match_parent"
android:id="@+id/S" android:text="S" android:tag="S"
android:clickable="true" android:onClick="quickScroll"
/>
<TextView
android:layout_width="match_parent" android:layout_height="match_parent"
android:id="@+id/T" android:text="T" android:tag="T"
android:clickable="true" android:onClick="quickScroll"
/>
<TextView
android:layout_width="match_parent" android:layout_height="match_parent"
android:id="@+id/U" android:text="U" android:tag="U"
android:clickable="true" android:onClick="quickScroll"
/>
<TextView
android:layout_width="match_parent" android:layout_height="match_parent"
android:id="@+id/V" android:text="V" android:tag="V"
android:clickable="true" android:onClick="quickScroll"
/>
<TextView
android:layout_width="match_parent" android:layout_height="match_parent"
android:id="@+id/W" android:text="W" android:tag="W"
android:clickable="true" android:onClick="quickScroll"
/>
<TextView
android:layout_width="match_parent" android:layout_height="match_parent"
android:id="@+id/X" android:text="X" android:tag="X"
android:clickable="true" android:onClick="quickScroll"
/>
<TextView
android:layout_width="match_parent" android:layout_height="match_parent"
android:id="@+id/Y" android:text="Y" android:tag="Y"
android:clickable="true" android:onClick="quickScroll"
/>
<TextView
android:layout_width="match_parent" android:layout_height="match_parent"
android:id="@+id/Z" android:text="Z" android:tag="Z"
android:clickable="true" android:onClick="quickScroll"
/>
</LinearLayout>
<Button
android:id="@+id/button1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentBottom="true"
android:layout_centerHorizontal="true"
android:text="Done" />
</RelativeLayout>
@bloodyshadow i am just asking you to apply OnClickListener
on TextViews first you apply that it will work
you were using onClick attribute
in xml that not work fine with that
您可以通过在Java类xml onClick中应用“ OnCLickListener”来解决此问题,在此不起作用
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