android - addView to layout with java -


i trying understand how add views programatically (with java) in android applications. created simple layout (below) practice struggle solve following error:

java.lang.illegalstateexception: not find method addingview() in parent or ancestor context android:onclick attribute defined on view class android.support.v7.widget.appcompatbutton id 'button'

screenshot app:

my xml:

 <?xml version="1.0" encoding="utf-8"?> <linearlayout xmlns:android="http://schemas.android.com/apk/res/android"     xmlns:tools="http://schemas.android.com/tools"     android:orientation="vertical"     android:id="@+id/activity_main"     android:layout_width="match_parent"     android:layout_height="match_parent"     android:paddingbottom="@dimen/activity_vertical_margin"     android:paddingleft="@dimen/activity_horizontal_margin"     android:paddingright="@dimen/activity_horizontal_margin"     android:paddingtop="@dimen/activity_vertical_margin"     tools:context="com.example.android.view_create_test_1.mainactivity">      <linearlayout         android:id="@+id/top"         android:orientation="horizontal"         android:layout_width="match_parent"         android:layout_height="0dp"         android:layout_weight="4"         android:background="#555555">     </linearlayout>      <relativelayout         android:id="@+id/bottom"         android:orientation="horizontal"         android:layout_width="match_parent"         android:layout_height="0dp"         android:layout_weight="1"         android:background="#116677">          <button             android:text="add"             android:layout_width="wrap_content"             android:layout_height="wrap_content"             android:id="@+id/button"             android:layout_centerinparent="true"             android:onclick="addingview"/>     </relativelayout>  </linearlayout>

my java:

public class mainactivity extends appcompatactivity {      @override     protected void oncreate(bundle savedinstancestate) {         super.oncreate(savedinstancestate);         setcontentview(r.layout.activity_main);     }      public void addingview (){         linearlayout top = (linearlayout) findviewbyid(r.id.top);         linearlayout newlayout = new linearlayout (this);         linearlayout.layoutparams params = new linearlayout.layoutparams(viewgroup.layoutparams.match_parent, viewgroup.layoutparams.wrap_content);         newlayout.setlayoutparams(new actionbar.layoutparams(actionbar.layoutparams.wrap_content, 50));         top.addview(newlayout,params);     }  }

please me out how solve error. thanks

your method should come this

public void addingview (view view){          linearlayout top = (linearlayout) findviewbyid(r.id.top);         linearlayout newlayout = new linearlayout (this);         linearlayout.layoutparams params = new linearlayout.layoutparams(viewgroup.layoutparams.match_parent, viewgroup.layoutparams.wrap_content);         newlayout.setlayoutparams(new actionbar.layoutparams(actionbar.layoutparams.wrap_content, 50));         top.addview(newlayout,params); }

Comments

Post a Comment

Popular posts from this blog

aws api gateway - SerializationException in posting new Records via Dynamodb Proxy Service in API -

i getting "__type": "com.amazon.coral.service#serializationexception" as reply in postman & in test console in api gateway trying post record directly dynamodb using api proxy services.. referring aws article - https://aws.amazon.com/blogs/compute/using-amazon-api-gateway-as-a-proxy-for-dynamodb/ here's mapping { "tablename": "tablenamegoeshere", "item": { "id" : "$context.requestid" "eventname" : "$input.path('$.eventname')", "timestamp" : $input.path('$.timestamp'), "answers": "$util.parsejson($input.path('$.answers'))" } } update: did asked ... , worked if try add array of json objects gives me above same error - here's trying now. please - couldnt find on google well #set($inputroot = $input.path('$')) { "tablename": "answer", "item": {
Read more

asp.net - Problems sending emails from forum -

i have been redesigning site has message board, has been written guy looked after site. it has few problems , written in .asp , uses .mdb files database. you can see whole thing here . feel free post if helps, test thing have set using original files , new database. the basic problem when posts message, supposed email sent them, have posted it. when replies, originator supposed message, replier has been posted. i’d have thought @ point in process there should script/file in postmessage.asp? the postmessage.asp page below. <% option explicit %> <!-- #include virtual="common/adovbs.inc" --> <html> <head> <meta http-equiv="content-type" content="text/html; charset=windows-1252"> <meta name="generator" content="microsoft frontpage 4.0"> <meta name="progid" content="frontpage.editor.document"> <title>new page 2</title> <base target="_self"
Read more