title: Could not find a method onClick_Foo(View) - first time running on Android Lollipop
body: <p>I have an app that is about a year old, is on the Play store in beta, has gone through dozens of revisions.  All of a sudden I'm getting an error: </p>
  
  <blockquote>
    <p>Could not find a method onClick_Foo(View) in the activity class
    android.view.ContextThemeWrapper for onClick handler on view class 
    android.widget.Button with id 'Foo_Button'</p>
  </blockquote>
  
  <p>I'm getting this error on every one of the 7 buttons defined in my XML.  Since yesterday I've updating appcompat-v7 from 21.0.3 to 22.0.0 but also upgraded my testing device from KitKat to Lollipop for the first time.</p>
  
  <p>I've double-checked spellings, capitalizations, none of the usual suspects explains this.  Here's a sample of the relevant code.  Let me know if you feel more would be helpful.  (The activity has 915 lines of code and the xml 186, so don't ask for the whole thing).  Testing on a Verizon Note 4 running Lollipop 5.0.1</p>
  
  <p>activity_pick.xml:</p>
  
  <pre><code>&lt;ScrollView xmlns:android="http://schemas.android.com/apk/res/android"
      xmlns:tools="http://schemas.android.com/tools"
      android:theme="@style/AppTheme"
      tools:context="com.myapp.Pick"
      android:layout_height="match_parent"
      android:layout_width="match_parent"&gt;
  
  &lt;LinearLayout
      android:layout_width="match_parent"
      android:layout_height="wrap_content"
      android:paddingLeft="@dimen/activity_horizontal_margin"
      android:paddingRight="@dimen/activity_horizontal_margin"
      android:paddingTop="@dimen/activity_vertical_margin"
      android:paddingBottom="@dimen/activity_vertical_margin"
      android:orientation="vertical"&gt;
  
          &lt;Button
              android:layout_width="wrap_content"
              android:layout_height="wrap_content"
              android:id="@+id/Ratings_Button"
              android:textSize="16dp"
              android:text="@string/Pick_Ratings_Button"
              android:onClick="onClick_Ratings"
              android:background="@android:drawable/btn_default"/&gt;
  &lt;/LinearLayout&gt;
  &lt;/ScrollView&gt;
  </code></pre>
  
  <p>Pick.java:</p>
  
  <pre><code>public class Pick_Restaurant extends ActionBarActivity {
      public void onClick_Ratings (View v) {
          Intent intent = new Intent(mContext, Ratings.class);
          startActivityForResult(intent,RATINGS);
      }
  }
  </code></pre>
  
  <p>build.gradle:</p>
  
  <pre><code>apply plugin: 'com.android.application'
  
  android {
      compileSdkVersion 22
      buildToolsVersion "22.0.1"
  
  defaultConfig {
      minSdkVersion 15
      targetSdkVersion 22
      versionCode 59
      versionName "0.6.4"
  }
  
  ...
  
  dependencies {
      compile fileTree(include: ['*.jar'], dir: 'libs')
      compile 'com.android.support:appcompat-v7:22.0.0'
      compile 'com.google.android.gms:play-services:7.0.0'
      compile files('libs/mobileservices-1.1.5.jar')
  }
  </code></pre>
  
  <p>Full Error on Log:</p>
  
  <pre><code>04-08 17:06:40.578    3508-3508/com.myapp.debug E/AndroidRuntime﹕ FATAL EXCEPTION: main
      Process: com.myapp.debug, PID: 3508
      java.lang.IllegalStateException: Could not find a method onClick_Ratings(View) in the activity class android.view.ContextThemeWrapper for onClick handler on view class android.widget.Button with id 'Ratings_Button'
              at android.view.View$1.onClick(View.java:4234)
              at android.view.View.performClick(View.java:5191)
              at android.view.View$PerformClick.run(View.java:20916)
              at android.os.Handler.handleCallback(Handler.java:739)
              at android.os.Handler.dispatchMessage(Handler.java:95)
              at android.os.Looper.loop(Looper.java:145)
              at android.app.ActivityThread.main(ActivityThread.java:5974)
              at java.lang.reflect.Method.invoke(Native Method)
              at java.lang.reflect.Method.invoke(Method.java:372)
              at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1388)
              at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1183)
       Caused by: java.lang.NoSuchMethodException: onClick_Ratings [class android.view.View]
              at java.lang.Class.getMethod(Class.java:665)
              at android.view.View$1.onClick(View.java:4227)
              at android.view.View.performClick(View.java:5191)
              at android.view.View$PerformClick.run(View.java:20916)
              at android.os.Handler.handleCallback(Handler.java:739)
              at android.os.Handler.dispatchMessage(Handler.java:95)
              at android.os.Looper.loop(Looper.java:145)
              at android.app.ActivityThread.main(ActivityThread.java:5974)
              at java.lang.reflect.Method.invoke(Native Method)
              at java.lang.reflect.Method.invoke(Method.java:372)
              at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1388)
              at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1183)
  </code></pre>