title: Application not Installed' Error on Android 2.3.4
body: <p>I have a program working in the Android Emulator. Every now and again I have been creating a <code>.apk</code> and exporting it to my <em>SonyEricsson Xperia</em> active to test. I have face the error <strong>Applicton not install.</strong></p>
  
  <p>I have tried rebooting the phone &amp; removing the existing <code>.apk,</code> does not fix fault</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.note"
      android:versionCode="1"
      android:versionName="1.0" &gt;
  
      &lt;uses-sdk android:minSdkVersion="8" /&gt;
      &lt;supports-screens
      android:largeScreens="true"
      android:normalScreens="true"
      android:smallScreens="true"/&gt;
  
      &lt;application
          android:icon="@drawable/ic_launcher"
          android:label="@string/app_name" &gt;
          &lt;activity
              android:name=".NoteActivity"
              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=".NoteActivity"&gt;&lt;/activity&gt;
          &lt;activity android:name=".NoteActivity1"&gt;&lt;/activity&gt;
           &lt;activity android:name=".NoteActivity2"&gt;&lt;/activity&gt;
      &lt;/application&gt;
  
  &lt;/manifest&gt;
  </code></pre>
  
  <p>Many thanks</p>