CODEWITHSUNDEEP
androidmetadataandroid-applicationinfo
Juan Bentel
Juan Bentel

Reputation: 477

Android metadata from manifest returning null

I have a class with one method that tries to retrieve meta-data from the manifest. Everything works fine except that the bundle that I create from the application info returns null values

Here's the code:

    private int getCurrentVersion(){
    int currVersion = 0;

    try {
        ApplicationInfo app = context.getPackageManager().getApplicationInfo(context.getPackageName(),PackageManager.GET_META_DATA);
        Bundle bundle = app.metaData;

        for (String key: bundle.keySet())
        {
          Log.d ("TEST", key + " is a key in the bundle");
        }

        Log.d("TEST","google: "+bundle.getString("com.google.android.gms.version"));
        Log.d("TEST","version: "+bundle.getString("dbVersion"));

        //currVersion = Integer.valueOf(bundle.getString("dbVersion"));
        currVersion = 1;
    } catch (NameNotFoundException e) {
        e.printStackTrace();
    } catch (NullPointerException e) {
        e.printStackTrace();         
    }

    return currVersion;
}


03-05 18:53:23.818: D/TEST(31400): com.google.android.gms.version is a key in the bundle
03-05 18:53:23.818: D/TEST(31400): dbVersion is a key in the bundle
03-05 18:53:23.828: D/TEST(31400): google: null
03-05 18:53:23.828: D/TEST(31400): version: null

As you can see I'm using some logs to see if the bundle is empty, but its not.

Upvotes: 26

Views: 27077

Answers (2)

Jorgesys
Jorgesys

Reputation: 126563

In some cases you need to use getInt() method:

bundle.getInt("com.google.android.gms.version"));

because the value of this meta-data is defined as an integer.

Log.d("TEST","google: "+bundle.getInt("com.google.android.gms.version"));

For example if the value defined in your meta-data is a String:

     <meta-data 
         android:name="com.elenasys.a"
         android:value="abcXJ434" />

use:

   bundle.getString("com.elenasys.a"));

if the value is an integer:

   <meta-data 
         android:name="com.elenasys.b"
         android:value="1234" />

use getInt()

 bundle.getInt("com.elenasys.b"));

Upvotes: 31

IAmCoder
IAmCoder

Reputation: 3442

Also make sure the tag is under the manifest/application node in AndroidManifest.xml and not just under the root:

<manifest xmlns:android="http://schemas.android.com/apk/res/android"
  package="com.example.readmetadata"
  android:versionCode="1"
  android:versionName="1.0">
    <application android:icon="@drawable/icon" android:label="@string/app_name">

        <meta-data android:name="dbVersion" android:value="1.0" />

        <activity android:name=".MainMenu" android:label="@string/app_name">
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />
                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
    </application>
    <uses-sdk android:minSdkVersion="3" android:targetSdkVersion="8" />
</manifest>

Upvotes: 3

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