title: My android app crashes in the emulator
body: <p>Im trying to make a simple app, I wanted to add a new Activity but whenI run my app on the emulator (Eclipse don't give me any error) it just crashes.</p>
  
  <p>This is my logcat:</p>
  
  <pre><code>09-21 05:18:13.066: I/Process(255): Sending signal. PID: 255 SIG: 9
  09-21 05:18:13.106: I/ActivityManager(52): Process com.example.proyecto_1 (pid 255) has died.
  09-21 05:18:13.172: I/UsageStats(52): Unexpected resume of com.android.launcher while     already resumed in com.example.proyecto_1
  09-21 05:18:13.402: E/gralloc(52): [unregister] handle 0x14d478 still locked (state=40000001)
  09-21 05:18:13.462: W/InputManagerService(52): Window already focused, ignoring focus gain of: com.android.internal.view.IInputMethodClient$Stub$Proxy@44de1dc8
  09-21 05:18:16.193: W/KeyCharacterMap(107): No keyboard for id 0
  09-21 05:18:16.203: W/KeyCharacterMap(107): Using default keymap: /system/usr/keychars/qwerty.kcm.bin
  09-21 05:18:18.594: I/ActivityManager(52): Starting activity: Intent { act=android.intent.action.MAIN cat=[android.intent.category.LAUNCHER] flg=0x10200000 cmp=com.example.proyecto_1/.MainActivity }
  09-21 05:18:18.673: I/ActivityManager(52): Start proc com.example.proyecto_1 for activity com.example.proyecto_1/.MainActivity: pid=261 uid=10028 gids={}
  09-21 05:18:18.913: D/ddm-heap(261): Got feature list request
  09-21 05:18:19.083: D/AndroidRuntime(261): Shutting down VM
  09-21 05:18:19.123: W/dalvikvm(261): threadid=3: thread exiting with uncaught exception (group=0x4001b188)
  09-21 05:18:19.123: E/AndroidRuntime(261): Uncaught handler: thread main exiting due to uncaught exception
  09-21 05:18:19.233: E/AndroidRuntime(261): java.lang.RuntimeException: Unable to instantiate activity ComponentInfo{com.example.proyecto_1/com.example.proyecto_1.MainActivity}: java.lang.ClassNotFoundException: com.example.proyecto_1.MainActivity in loader dalvik.system.PathClassLoader@4001b500
  09-21 05:18:19.233: E/AndroidRuntime(261):  at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2417)
  09-21 05:18:19.233: E/AndroidRuntime(261):  at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2512)
  09-21 05:18:19.233: E/AndroidRuntime(261):  at android.app.ActivityThread.access$2200(ActivityThread.java:119)
  09-21 05:18:19.233: E/AndroidRuntime(261):  at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1863)
  09-21 05:18:19.233: E/AndroidRuntime(261):  at android.os.Handler.dispatchMessage(Handler.java:99)
  09-21 05:18:19.233: E/AndroidRuntime(261):  at android.os.Looper.loop(Looper.java:123)
  09-21 05:18:19.233: E/AndroidRuntime(261):  at android.app.ActivityThread.main(ActivityThread.java:4363)
  09-21 05:18:19.233: E/AndroidRuntime(261):  at java.lang.reflect.Method.invokeNative(Native Method)
  09-21 05:18:19.233: E/AndroidRuntime(261):  at java.lang.reflect.Method.invoke(Method.java:521)
  09-21 05:18:19.233: E/AndroidRuntime(261):  at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:860)
  09-21 05:18:19.233: E/AndroidRuntime(261):  at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:618)
  09-21 05:18:19.233: E/AndroidRuntime(261):  at dalvik.system.NativeStart.main(Native Method)
  09-21 05:18:19.233: E/AndroidRuntime(261): Caused by: java.lang.ClassNotFoundException: com.example.proyecto_1.MainActivity in loader dalvik.system.PathClassLoader@4001b500
  09-21 05:18:19.233: E/AndroidRuntime(261):  at dalvik.system.PathClassLoader.findClass(PathClassLoader.java:243)
  09-21 05:18:19.233: E/AndroidRuntime(261):  at java.lang.ClassLoader.loadClass(ClassLoader.java:573)
  09-21 05:18:19.233: E/AndroidRuntime(261):  at java.lang.ClassLoader.loadClass(ClassLoader.java:532)
  09-21 05:18:19.233: E/AndroidRuntime(261):  at android.app.Instrumentation.newActivity(Instrumentation.java:1021)
  09-21 05:18:19.233: E/AndroidRuntime(261):  at     android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2409)
  09-21 05:18:19.233: E/AndroidRuntime(261):  ... 11 more
  09-21 05:18:19.314: I/Process(52): Sending signal. PID: 261 SIG: 3
  09-21 05:18:19.314: I/dalvikvm(261): threadid=7: reacting to signal 3
  09-21 05:18:19.333: I/dalvikvm(261): Wrote stack trace to '/data/anr/traces.txt'
  09-21 05:18:21.073: I/Process(261): Sending signal. PID: 261 SIG: 9
  09-21 05:18:21.093: I/ActivityManager(52): Process com.example.proyecto_1 (pid 261) has died.
  09-21 05:18:21.114: I/UsageStats(52): Unexpected resume of com.android.launcher while already resumed in com.example.proyecto_1
  09-21 05:18:21.263: W/InputManagerService(52): Window already focused, ignoring focus gain of: com.android.internal.view.IInputMethodClient$Stub$Proxy@44dae108
  </code></pre>
  
  <p>and this is my MainActivity:</p>
  
  <pre><code>package com.example.proyecto_1;
  
  import android.app.Activity;
  import android.content.Intent;
  import android.os.Bundle;
  import android.view.View;
  import android.view.View.OnClickListener;
  import android.widget.Button;
  
  public class MainActivity extends Activity {
  
  @Override
  public void onCreate(Bundle savedInstanceState) {
      super.onCreate(savedInstanceState);
      setContentView(R.layout.activity_main);
  
      Button button1 = (Button) findViewById(R.id.button1);
      button1.setOnClickListener(new OnClickListener() {
  
          @Override
          public void onClick(View v) {
              Intent test_scrn1 = new Intent(MainActivity.this, TestScrn1.class);
              startActivity(test_scrn1);
          }
      });
  
      }
  }
  </code></pre>
  
  <p>And finally this is my AndroidManifest:</p>
  
  <pre><code>&lt;manifest xmlns:android="http://schemas.android.com/apk/res/android"
  package="com.example.proyecto_1"
  android:versionCode="1"
  android:versionName="1.0" &gt;
  
  &lt;uses-sdk
      android:minSdkVersion="7"
      android:targetSdkVersion="15" /&gt;
  
  &lt;application
      android:icon="@drawable/ic_launcher"
      android:label="@string/app_name"
      android:theme="@style/AppTheme" android:hasCode="false" android:allowTaskReparenting="false"&gt;
      &lt;activity
          android:name=".MainActivity"
          android:label="@string/title_activity_main" &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="TestScrn1"&gt;&lt;/activity&gt;
  &lt;/application&gt;
  </code></pre>
  
  <p></p>
  
  <p>I don't know what I'm doing wrong, I've look for a solution but I just can't, please, help me.</p>