title: trying to send intent to other app: error SecurityException: Permission Denial: starting Intent
body: <p>I'm trying to send an intent from app A to app B. In the activity of app A I do the following:</p>
  
  <pre><code>Intent i = new Intent();
  i.setAction("com.example.test2.REQUEST_RESPONSE");
  i.putExtra("info", "bla bla bla");
  startActivityForResult(i, 0);
  </code></pre>
  
  <p>In app B I have the following activity in the manifest:</p>
  
  <pre><code>    &lt;activity android:name=".Receiving"
          android:label="@string/app_name"
          android:exported="false" &gt;
          &lt;intent-filter&gt;
              &lt;action android:name="com.example.test2.REQUEST_RESPONSE" /&gt;
              &lt;category android:name="android.intent.category.DEFAULT" /&gt;
          &lt;/intent-filter&gt;
      &lt;/activity&gt;
  </code></pre>
  
  <p>and this in the activity's onCreate:</p>
  
  <pre><code>Intent intent = getIntent();
  if (intent.getAction().equals("com.example.test2.REQUEST_RESPONSE")) {
      Log.e("Received", "Intent received thank you!");
  }
  </code></pre>
  
  <p>With this I receive the following error:</p>
  
  <pre><code>01-18 12:30:44.950: E/AndroidRuntime(31200): FATAL EXCEPTION: main
  01-18 12:30:44.950: E/AndroidRuntime(31200): java.lang.RuntimeException: Unable to     resume activity {com.example.test/com.example.test.MainActivity}:     java.lang.SecurityException: Permission Denial: starting Intent { act=example.test2.REQUEST_RESPONSE cmp=example.test2/.Receiving (has extras) } from ProcessRecord{41ae02d8 31200:com.example.test/u0a10107} (pid=31200, uid=10107) not exported from uid 10115
  01-18 12:30:44.950: E/AndroidRuntime(31200):    at android.app.ActivityThread.performResumeActivity(ActivityThread.java:2742)
  01-18 12:30:44.950: E/AndroidRuntime(31200):    at android.app.ActivityThread.handleResumeActivity(ActivityThread.java:2771)
  01-18 12:30:44.950: E/AndroidRuntime(31200):    at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2235)
  01-18 12:30:44.950: E/AndroidRuntime(31200):    at android.app.ActivityThread.access$600(ActivityThread.java:141)
  01-18 12:30:44.950: E/AndroidRuntime(31200):    at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1234)
  01-18 12:30:44.950: E/AndroidRuntime(31200):    at android.os.Handler.dispatchMessage(Handler.java:99)
  01-18 12:30:44.950: E/AndroidRuntime(31200):    at android.os.Looper.loop(Looper.java:137)
  01-18 12:30:44.950: E/AndroidRuntime(31200):    at android.app.ActivityThread.main(ActivityThread.java:5039)
  01-18 12:30:44.950: E/AndroidRuntime(31200):    at java.lang.reflect.Method.invokeNative(Native Method)
  01-18 12:30:44.950: E/AndroidRuntime(31200):    at java.lang.reflect.Method.invoke(Method.java:511)
  01-18 12:30:44.950: E/AndroidRuntime(31200):    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:793)
  01-18 12:30:44.950: E/AndroidRuntime(31200):    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:560)
  01-18 12:30:44.950: E/AndroidRuntime(31200):    at dalvik.system.NativeStart.main(Native Method)
  01-18 12:30:44.950: E/AndroidRuntime(31200): Caused by: java.lang.SecurityException: Permission Denial: starting Intent { act=com.example.test2.REQUEST_RESPONSE cmp=com.example.test2/.Receiving (has extras) } from ProcessRecord{41ae02d8 31200:com.example.test/u0a10107} (pid=31200, uid=10107) not exported from uid 10115
  01-18 12:30:44.950: E/AndroidRuntime(31200):    at android.os.Parcel.readException(Parcel.java:1425)
  01-18 12:30:44.950: E/AndroidRuntime(31200):    at android.os.Parcel.readException(Parcel.java:1379)
  01-18 12:30:44.950: E/AndroidRuntime(31200):    at android.app.ActivityManagerProxy.startActivity(ActivityManagerNative.java:1870)
  01-18 12:30:44.950: E/AndroidRuntime(31200):    at android.app.Instrumentation.execStartActivity(Instrumentation.java:1412)
  01-18 12:30:44.950: E/AndroidRuntime(31200):    at android.app.Activity.startActivityForResult(Activity.java:3370)
  01-18 12:30:44.950: E/AndroidRuntime(31200):    at android.app.Activity.startActivityForResult(Activity.java:3331)
  01-18 12:30:44.950: E/AndroidRuntime(31200):    at com.example.test.MainActivity.onResume(MainActivity.java:125)
  01-18 12:30:44.950: E/AndroidRuntime(31200):    at android.app.Instrumentation.callActivityOnResume(Instrumentation.java:1185)
  01-18 12:30:44.950: E/AndroidRuntime(31200):    at android.app.Activity.performResume(Activity.java:5182)
  01-18 12:30:44.950: E/AndroidRuntime(31200):    at android.app.ActivityThread.performResumeActivity(ActivityThread.java:2732)
  01-18 12:30:44.950: E/AndroidRuntime(31200):    ... 12 more
  </code></pre>
  
  <p>If I remove the category from the intent filter I get this error instead:</p>
  
  <pre><code>01-18 12:21:03.059: E/AndroidRuntime(30865): Caused by: android.content.ActivityNotFoundException: No Activity found to handle Intent { act=com.example.test2.REQUEST_RESPONSE (has extras) }
  </code></pre>
  
  <p>Any ideas?</p>