java - Android Studio (1.5.1) -- Error: cannot find symbol class / App won't run -


i'm working on first android application. it's simple farenheit/celsius converter, , of ids, methods, , buttons/text fields copied out. triple checked. (i'm following instructions video professor posted.) however, i'm having difficulty trying android studio run application.

i've found plenty of questions similar 1 , many of them suggest synchronizing gradle files. did. i'm still getting these same error messages:

enter image description here

here app information:

enter image description here

code app/res/layout/content_test.xml:

<?xml version="1.0" encoding="utf-8"?> <relativelayout xmlns:android="http://schemas.android.com/apk/res/android"     xmlns:app="http://schemas.android.com/apk/res-auto"     xmlns:tools="http://schemas.android.com/tools"     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"     app:layout_behavior="@string/appbar_scrolling_view_behavior"     tools:context="john.testapplication.testactivity"     tools:showin="@layout/activity_test">      <edittext         android:layout_width="match_parent"         android:layout_height="wrap_content"         android:inputtype="numberdecimal"         android:ems="10"         android:id="@+id/temperatureedittext"         android:layout_alignparenttop="true"         android:layout_alignparentleft="true"         android:layout_alignparentstart="true"         android:hint="enter temperature" />      <radiogroup         android:layout_width="match_parent"         android:layout_height="wrap_content"         android:layout_below="@+id/temperatureedittext"         android:layout_alignparentleft="true"         android:layout_alignparentstart="true"         android:id="@+id/radiogroup">          <radiobutton             android:layout_width="wrap_content"             android:layout_height="wrap_content"             android:text="from celsius farenheit"             android:id="@+id/tofarenheitradiobutton"             android:checked="false" />          <radiobutton             android:layout_width="wrap_content"             android:layout_height="wrap_content"             android:text="from farenheit celsius"             android:id="@+id/tocelsiusradiobutton"             android:checked="false" />     </radiogroup>      <button         android:layout_width="wrap_content"         android:layout_height="wrap_content"         android:text="convert"         android:id="@+id/convertbutton"         android:layout_below="@+id/radiogroup"         android:layout_alignparentleft="true"         android:layout_alignparentstart="true"         android:onclick="convert" /> </relativelayout>

code app/res/layout/activitytest.xml: (i thought using relative layout, don't know if has problem)

<?xml version="1.0" encoding="utf-8"?> <android.support.design.widget.coordinatorlayout xmlns:android="http://schemas.android.com/apk/res/android"     xmlns:app="http://schemas.android.com/apk/res-auto"     xmlns:tools="http://schemas.android.com/tools"     android:layout_width="match_parent"     android:layout_height="match_parent"     android:fitssystemwindows="true"     tools:context="john.testapplication.testactivity">      <android.support.design.widget.appbarlayout         android:layout_width="match_parent"         android:layout_height="wrap_content"         android:theme="@style/apptheme.appbaroverlay">          <android.support.v7.widget.toolbar             android:id="@+id/toolbar"             android:layout_width="match_parent"             android:layout_height="?attr/actionbarsize"             android:background="?attr/colorprimary"             app:popuptheme="@style/apptheme.popupoverlay" />      </android.support.design.widget.appbarlayout>      <include layout="@layout/content_test" />      <android.support.design.widget.floatingactionbutton         android:id="@+id/fab"         android:layout_width="wrap_content"         android:layout_height="wrap_content"         android:layout_gravity="bottom|end"         android:layout_margin="@dimen/fab_margin"         android:src="@android:drawable/ic_dialog_email" />  </android.support.design.widget.coordinatorlayout>

again, building app video instructor gave me, i'm willing bet has version of android studio or settings on computer opposed code itself.

okay, on site, found solution. apparently in testactivity.xml, forgot import these:

import android.widget.edittext; import android.widget.radiobutton;

fixed everything. had assumed imported. eugen pechanec helpful tips.


Comments

Post a Comment

Popular posts from this blog

javascript - jQuery: Add class depending on URL in the best way -

i have html progress meter: <div class="col-md-3" style="margin-left: -20px;"> <div class="progress-pos active" id="progess-1"> <div class="progress-pos-inner"> login </div> </div> </div> <div class="col-md-3 progress-pos-container"> <div class="progress-pos" id="progess-2"> <div class="progress-pos-inner"> scan items </div> </div> </div> <div class="col-md-3 progress-pos-container"> <div class="progress-pos" id="progess-3"> <div class="progress-pos-inner"> confirm address </div> </div> </div> <div class="col-md-3 progress-pos-container"> <div class="progress-pos" id="progess-4"> <div class="progress-pos-in...
Read more

caching - How to check if a url path exists in the service worker cache -

i need check if particular url path exists in service worker cache. example, suppose url is: /myserviceworker/service?a=110&b=70 this url exists in cache, there many of them different values of , b. now, suppose want refresh of these urls, how can that? i want know how access key values service worker cache. if know key, plan follows: var url = new url(key); if(url.pathname === "\/myserviceworker/service") refetch key but not sure how cache key , in format is. mean, string or url? cache api has match() method returns promise resolving in response object if match or undefined if no match exists. second parameter object can specify ignoresearch not take account url parameters. the ignoresearch option supported firefox ( chrome status here ). in other hand, retrieve cache entries, can use keys() method.
Read more

Redirect to a HTTPS version using .htaccess -

i need modify .htaccess file redirect urls https version without "www". http://example.com --> https://example.com http://www.example.com --> https://example.com https://www.example.com --> https://example.com this how .htaccess file looks like: rewriteengine on rewritecond %{request_filename} !-d rewritecond %{request_filename} !-f rewriterule ^(.*)$ redirect.php?id=$1&page=$2 [qsa,l] what modifications need make .htaccess in order forward https without "www"? it depends on doing current code. looks file called redirect trying display php page seo friendly url. think might confusing people. anyway, need , force https without www, need 1 more rule above. also second rule needs two capture groups in rewriterule test string because wanting 2 different values using $1 , $2 references. rewriteengine on #rediect www non www and/or http https --- combinations. rewritecond %{http_host} !^example\.com [nc,or] rewritecond %{https} !^...
Read more