android - What does "Unable to instatiate activity ComponentInfo" stands for? -

i trying develop android app, gps, , using google maps api v2. error (bigger picture in link) showing , app crashes immidiately after run.

and here's androidmanifest.xml file:

<?xml version="1.0" encoding="utf-8"?> <manifest xmlns:android="http://schemas.android.com/apk/res/android"     package="com.bajo.moj.gpsreminder" >     android:versioncode="1"     android:versionname="1.0" >      <uses-sdk         android:minsdkversion="11"         android:targetsdkversion="19" />      <!-- dobivanje douštenja za mape -->     <permission         android:name="com.bajo.moj.gpsreminder.permission.maps_receive"         android:protectionlevel="signature"/>     <uses-permission android:name="com.bajo.moj.gpsreminder.maps_receive"/>       <!-- doupuštenje za internet, vanjsku pohranu ostalo-->     <uses-permission android:name="android.permission.internet"/>     <uses-permission android:name="android.permission.access_network_state"/>     <uses-permission android:name="android.permission.write_external_storage"/>     <uses-permission android:name="com.google.android.providers.gfs.permission.read_gservices"/>      <!-- nije potrebno za google maps api v2, ali je recommended -->     <uses-permission android:name="android.permission.access_coarse_location"/>     <uses-permission android:name="android.permission.access_fine_location"/>       <!-- opengl verzija 2.0 za renderanje screen-a -->     <uses-feature         android:glesversion="0x00020000"         android:required="true"/>   <application     android:debuggable="true"     android:allowbackup="true"     android:icon="@mipmap/ic_launcher"     android:label="@string/app_name"     android:theme="@style/apptheme" >      <!-- kljuc od google-a -->     <meta-data         android:name="com.google.android.maps.v2.api_key"         android:value="aizasycv9plzy-rcaj30cnxw_jrgxjg5czlis9a"/>      <activity         android:name=".mainactivity"         android:label="@string/app_name" >         <intent-filter>             <action android:name="android.intent.action.main" />              <category android:name="android.intent.category.launcher" />         </intent-filter>     </activity>  </application>  </manifest> 

//also, using 2 java activities below: -> not.

• mainactivity code: mainactivity

• locationprovider code: locationprovider

• error that's showing , why app still crashes...

i using 2 java activities below

did have 2 activities? if so, haven't declared 1 of them in manifest file.