title: Android: Unable to instantiate activity ComponentInfo
body: <p>I have a problem on android developing app. I made a research first my error and i found out that there are other people who are having the same problem like me. I read all the comments a tried everything but still i'm having the same error. </p>
  
  <p>Here my error</p>
  
  <pre><code>05-29 12:39:36.701: E/AndroidRuntime(823): java.lang.RuntimeException: Unable to instantiate activity ComponentInfo{com.georgepanayi.mixfmcyprus.radio/com.georgepanayi.mixfmcyprus.radio.Main_Activity}: java.lang.ClassNotFoundException: Didn't find class "com.georgepanayi.mixfmcyprus.radio.Main_Activity" on path: /data/app/com.georgepanayi.mixfmcyprus.radio-1.apk
  05-29 12:39:36.701: E/AndroidRuntime(823):  at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2106)
  05-29 12:39:36.701: E/AndroidRuntime(823):  at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2230)
  05-29 12:39:36.701: E/AndroidRuntime(823):  at android.app.ActivityThread.access$600(ActivityThread.java:141)
  05-29 12:39:36.701: E/AndroidRuntime(823):  at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1234)
  05-29 12:39:36.701: E/AndroidRuntime(823):  at android.os.Handler.dispatchMessage(Handler.java:99)
  05-29 12:39:36.701: E/AndroidRuntime(823):  at android.os.Looper.loop(Looper.java:137)
  05-29 12:39:36.701: E/AndroidRuntime(823):  at android.app.ActivityThread.main(ActivityThread.java:5041)
  05-29 12:39:36.701: E/AndroidRuntime(823):  at java.lang.reflect.Method.invokeNative(Native Method)
  05-29 12:39:36.701: E/AndroidRuntime(823):  at java.lang.reflect.Method.invoke(Method.java:511)
  05-29 12:39:36.701: E/AndroidRuntime(823):  at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:793)
  05-29 12:39:36.701: E/AndroidRuntime(823):  at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:560)
  05-29 12:39:36.701: E/AndroidRuntime(823):  at dalvik.system.NativeStart.main(Native Method)
  05-29 12:39:36.701: E/AndroidRuntime(823): Caused by: java.lang.ClassNotFoundException: Didn't find class "com.georgepanayi.mixfmcyprus.radio.Main_Activity" on path: /data/app/com.georgepanayi.mixfmcyprus.radio-1.apk
  05-29 12:39:36.701: E/AndroidRuntime(823):  at dalvik.system.BaseDexClassLoader.findClass(BaseDexClassLoader.java:65)
  05-29 12:39:36.701: E/AndroidRuntime(823):  at java.lang.ClassLoader.loadClass(ClassLoader.java:501)
  05-29 12:39:36.701: E/AndroidRuntime(823):  at java.lang.ClassLoader.loadClass(ClassLoader.java:461)
  05-29 12:39:36.701: E/AndroidRuntime(823):  at android.app.Instrumentation.newActivity(Instrumentation.java:1054)
  05-29 12:39:36.701: E/AndroidRuntime(823):  at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2097)
  05-29 12:39:36.701: E/AndroidRuntime(823):  ... 11 more
  </code></pre>
  
  <p>I have read that the problem is with the activity on the manifest and here is my class and the manifest
  class</p>
  
  <pre><code>package com.georgepanayi.mixfmcyprus.radio;
  
  import org.holoeverywhere.app.Activity;
  
  import android.os.Bundle;
  
  public class Main_Activity extends Activity {
  
      @Override
      protected void onCreate(Bundle savedInstanceState) {
          super.onCreate(savedInstanceState);
          setContentView(R.layout.activity_mix_fm__main);
      }
  
  }
  </code></pre>
  
  <p>manifest</p>
  
  <pre><code>&lt;?xml version="1.0" encoding="utf-8"?&gt;
  &lt;manifest xmlns:android="http://schemas.android.com/apk/res/android"
      package="com.georgepanayi.mixfmcyprus.radio"
      android:versionCode="1"
      android:versionName="1.0" &gt;
  
      &lt;uses-sdk
          android:minSdkVersion="10"
          android:targetSdkVersion="17" /&gt;
  
      &lt;application
          android:allowBackup="true"
          android:icon="@drawable/ic_launcher"
          android:label="@string/app_name"
          android:theme="@style/Theme.Mixfmradio" &gt;
          &lt;activity
              android:name=".Main_Activity"
              android:label="@string/app_name" &gt;
              &lt;intent-filter&gt;
                  &lt;action android:name="android.intent.action.MAIN" /&gt;
  
                  &lt;category android:name="android.intent.category.LAUNCHER" /&gt;
              &lt;/intent-filter&gt;
          &lt;/activity&gt;
  
      &lt;/application&gt;
  
  &lt;/manifest&gt;
  </code></pre>
  
  <p>Also I'm using libraries like Holoeverywhere, SherlockActionBar 4.3.1 and ViewPagerIndicator 2.4.1</p>
  
  <p>can anyone find the problem? </p>
  
  <p>Thank you</p>