CODEWITHSUNDEEP
androidandroid-intent
alibi
alibi

Reputation: 866

PackageManager queryIntentActivities returns empty list despite match

i have two apps which depend on each other and i now want to implement a test on whether all required intents are available.

I have used the general implementation from the Android Developers blog:

http://android-developers.blogspot.com/2009/01/can-i-use-this-intent.html

public static boolean isIntentAvailable(Context context, String action) {
    final PackageManager packageManager = context.getPackageManager();
    final Intent intent = new Intent(action); 
    intent.addFlags(Intent.FLAG_DEBUG_LOG_RESOLUTION); // ADDED BY ME
    List<ResolveInfo> list =
            packageManager.queryIntentActivities(intent,
                    PackageManager.MATCH_DEFAULT_ONLY);

    return list.size() > 0;
}

the manifest for the second app (which i check for) contains the following activity: 

    <activity android:name="MyPackageMyAction" android:exported="true" android:enabled="true">
        <intent-filter android:label="License">
         <action android:name="com.mypackage.action.myaction"/>
        <category android:name="android.intent.category.DEFAULT" />
        </intent-filter>
    </activity>

and i check for it with

boolean available = isIntentAvailable(this, "com.mypackage.action.myaction");

The log output contains this: 

VERBOSE/IntentResolver(59): Resolving type null scheme null of intent Intent { act=com.mypackage.action.myaction flg=0x8 }
VERBOSE/IntentResolver(59): Action list: [ActivityIntentInfo{440482c0 com.mypackage.action.myaction}]
VERBOSE/IntentResolver(59): Matching against filter ActivityIntentInfo{440482c0 com.mypackage.action.myaction}
VERBOSE/IntentResolver(59):   Filter matched!  match=0x108000
VERBOSE/IntentResolver(59): Final result list:

So, i would normally assume that isIntentAvailable returns true if the second app is installed. However, the list returned by queryIntentActivities is always empty.

What am I doing wrong?

Upvotes: 4

Views: 10403

Answers (2)

alibi
alibi

Reputation: 866

Ok, i feel very stupid now. After toying around with this problem for about a day i found the problem.

Everything was registered correctly and should have worked flawlessly, if i weren't so stupid :-). The app receiving the intent is a license key and is supposed to be hidden from the launcher. Therefore i had this line in my app: 

pkgMgr.setApplicationEnabledSetting(PACKAGE_NAME, PackageManager.COMPONENT_ENABLED_STATE_DISABLED, PackageManager.DONT_KILL_APP);

After removing it, everything worked straight away. Thanks for all your support!

Upvotes: 1

Nikola Despotoski
Nikola Despotoski

Reputation: 50578

If you say that this is the only only activity so the category has to be LAUNCHER

 <activity android:name="MyPackageMyAction" android:exported="true" android:enabled="true">
        <intent-filter android:label="License">
         <action android:name="com.mypackage.action.myaction"/>
        <category android:name="android.intent.category.LAUNCHER" />
        </intent-filter>
    </activity>

Also here you can find more on Intent http://developer.android.com/reference/android/content/Intent.html#CATEGORY_LAUNCHER

Upvotes: 0

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