Android - Changing Activity
<p>I have problem with changing activity. I added the line to AndroidManifest and it doesn't work. It means, there's error after click of "NowaGra" ImageButton. ( Error - "Sorry !, The Application Gra_Milionerzy(process gra_Milionerzy.Gra) has stopped unexpectdelly. Please try again )</p>

<p>It's main Activity ( Gra - Game in English )</p>

<pre><code>    package gra_Milionerzy.Gra;

import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.ImageButton;

public class Gra extends Activity {
    /** Called when the activity is first created. */
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);


        /*   Menu Gry */  

          ImageButton Nowa_Gra = (ImageButton)this.findViewById(R.id.nowa_gra);
          Nowa_Gra.setOnClickListener(new OnClickListener()
            {
      public void onClick(View v)
       {
       Intent intent = new Intent(Gra.this, NowaGra.class);
        startActivity(intent);   
          }      

            });


          ImageButton Profile = (ImageButton)this.findViewById(R.id.profile);
          Profile.setOnClickListener(new OnClickListener()
            {
      public void onClick(View arg0)
       {
        finish();
       }
            });

          ImageButton OAutorze = (ImageButton)this.findViewById(R.id.o_autorze);
          OAutorze.setOnClickListener(new OnClickListener()
            {
      public void onClick(View arg0)
       {
        finish();
       }
            });

          ImageButton Ustawienia = (ImageButton)this.findViewById(R.id.ustawienia);
          Ustawienia.setOnClickListener(new OnClickListener()
            {
      public void onClick(View arg0)
       {
        finish();
       }
            });

          /*  Koniec Menu Gry  */


          /*  Kola Ratunkowe  */




    }
}
</code></pre>

<p>and here's NowaGra ( NewGame ;P )</p>

<pre><code>package gra_Milionerzy.Gra;

import android.app.Activity;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.ImageButton;

public class NowaGra extends Activity {
    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
       finish();

        /*   Kola Ratunkowe */  





    }
}
</code></pre>

<p>and AndroidManifest </p>

<pre><code>&lt;?xml version="1.0" encoding="utf-8"?&gt;
&lt;manifest xmlns:android="http://schemas.android.com/apk/res/android"
      package="gra_Milionerzy.Gra"
      android:versionCode="1"
      android:versionName="1.0"&gt;
    &lt;application android:icon="@drawable/icon" android:label="@string/app_name"&gt;
        &lt;activity android:name=".Glowna"
                  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;activity android:name=".NowaGra"&gt;&lt;/activity&gt;
    &lt;/application&gt;


&lt;uses-sdk android:minSdkVersion="1"&gt;&lt;/uses-sdk&gt;
&lt;/manifest&gt; 
</code></pre>

<p>plus LogCat</p>

<pre><code>12-30 12:43:06.738: ERROR/AndroidRuntime(1379): FATAL EXCEPTION: main
12-30 12:43:06.738: ERROR/AndroidRuntime(1379): android.content.ActivityNotFoundException: Unable to find explicit activity class {gra_Milionerzy.Gra/gra_Milionerzy.Gra.NowaGra}; have you declared this activity in your AndroidManifest.xml?
12-30 12:43:06.738: ERROR/AndroidRuntime(1379):     at android.app.Instrumentation.checkStartActivityResult(Instrumentation.java:1404)
12-30 12:43:06.738: ERROR/AndroidRuntime(1379):     at android.app.Instrumentation.execStartActivity(Instrumentation.java:1378)
12-30 12:43:06.738: ERROR/AndroidRuntime(1379):     at android.app.Activity.startActivityForResult(Activity.java:2817)
12-30 12:43:06.738: ERROR/AndroidRuntime(1379):     at android.app.Activity.startActivity(Activity.java:2923)
12-30 12:43:06.738: ERROR/AndroidRuntime(1379):     at gra_Milionerzy.Gra.Gra$1.onClick(Gra.java:25)
12-30 12:43:06.738: ERROR/AndroidRuntime(1379):     at android.view.View.performClick(View.java:2408)
12-30 12:43:06.738: ERROR/AndroidRuntime(1379):     at android.view.View$PerformClick.run(View.java:8816)
12-30 12:43:06.738: ERROR/AndroidRuntime(1379):     at android.os.Handler.handleCallback(Handler.java:587)
12-30 12:43:06.738: ERROR/AndroidRuntime(1379):     at android.os.Handler.dispatchMessage(Handler.java:92)
12-30 12:43:06.738: ERROR/AndroidRuntime(1379):     at android.os.Looper.loop(Looper.java:123)
12-30 12:43:06.738: ERROR/AndroidRuntime(1379):     at android.app.ActivityThread.main(ActivityThread.java:4627)
12-30 12:43:06.738: ERROR/AndroidRuntime(1379):     at java.lang.reflect.Method.invokeNative(Native Method)
12-30 12:43:06.738: ERROR/AndroidRuntime(1379):     at java.lang.reflect.Method.invoke(Method.java:521)
12-30 12:43:06.738: ERROR/AndroidRuntime(1379):     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:868)
12-30 12:43:06.738: ERROR/AndroidRuntime(1379):     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:626)
12-30 12:43:06.738: ERROR/AndroidRuntime(1379):     at dalvik.system.NativeStart.main(Native Method)
</code></pre>

<p>And what I'm doing wrong ? Any ideas ?</p>

<p><em><strong></em>__<em>_</em>__<em>_</em>__<em>_</em>__<em>_</em>__<em>_</em>__<em>_</em>____</strong>-
ANWSER - The bad wrote in AndroidManifest</p>
