title: Can't open APK file on smartphone
body: <p>I've made an application in eclipse using android project. Now I installed that APK-file on my smartphone.</p>
  
  <p>When I hit install, it just installs, it's  fine. But then I get the option <strong>"Cancel"</strong>, or <strong>"open"</strong>. But I can't click on "Open". </p>
  
  <p>Just nothing happens every time I try to open it. It's not with my other apps.</p>
  
  <p>I can find it at "downloads", but I just can't open it. I can update and install it again countless times. Unknown sources in my settings is on. </p>
  
  <p>Does anyone know this issue, and/or how to fix it? </p>
  
  <p>Help would be appreciated.</p>
  
  <p>Manifest code:</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.example.rodekruis"
      android:versionCode="1"
      android:versionName="1.0" &gt;
  
      &lt;uses-sdk
          android:minSdkVersion="8"
          android:targetSdkVersion="21" /&gt;
  
      &lt;application
          android:allowBackup="true"
          android:icon="@drawable/ic_launcher"
          android:label="@string/app_name"
          android:theme="@style/AppTheme" &gt;
          &lt;activity
              android:name=".MainActivity"
              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=".BezoekActivity"
              android:label="@string/app_name" &gt;
              &lt;intent-filter&gt;
                  &lt;action android:name="com.example.rodekruis.BezoekActivity" /&gt;
  
                  &lt;category android:name="android.intent.category.DEFAULT" /&gt;
              &lt;/intent-filter&gt;
          &lt;/activity&gt;
          &lt;activity
              android:name=".AfspraakActivity"
              android:label="@string/title_activity_afspraak" &gt;
          &lt;/activity&gt;
          &lt;activity
              android:name=".ContactActivity"
              android:label="@string/title_activity_contact" &gt;
          &lt;/activity&gt;
          &lt;activity
              android:name=".MeningActivity"
              android:label="@string/title_activity_mening" &gt;
          &lt;/activity&gt;
          &lt;activity
              android:name=".RouteActivity"
              android:label="@string/title_activity_route" &gt;
          &lt;/activity&gt;
          &lt;activity
              android:name=".SpecialistenActivity"
              android:label="@string/title_activity_specialisten" &gt;
          &lt;/activity&gt;
          &lt;activity
              android:name=".BWCActivity"
              android:label="@string/title_activity_bwc" &gt;
          &lt;/activity&gt;
          &lt;activity
              android:name=".AgendaActivity"
              android:label="@string/title_activity_agenda" &gt;
          &lt;/activity&gt;
          &lt;activity
              android:name=".InfoActivity"
              android:label="@string/title_activity_informatie" &gt;
          &lt;/activity&gt;
          &lt;activity
              android:name=".VriendActivity"
              android:label="@string/title_activity_vriend" &gt;
          &lt;/activity&gt;
          &lt;activity
              android:name=".FoldersActivity"
              android:label="@string/title_activity_folders" &gt;
          &lt;/activity&gt;
          &lt;activity
              android:name=".NieuwsActivity"
              android:label="@string/title_activity_nieuws"&gt;
          &lt;/activity&gt;
      &lt;/application&gt;
  
  &lt;/manifest&gt;
  </code></pre>