static PackageInfo getDropboxAppPackage(Context context, Intent intent) {
        PackageManager manager = context.getPackageManager();

        List<ResolveInfo> infos = manager.queryIntentActivities(intent, 0);
        if (null == infos || 1 != infos.size()) {
            // The official app doesn't exist, or only an older version
            // is available, or multiple activities are confusing us.
            return null;
        } else {
            // The official app exists. Make sure it's the correct one by
            // checking signing keys.
            ResolveInfo resolveInfo = manager.resolveActivity(intent, 0);
            if (resolveInfo == null) {
                return null;
            }

            final PackageInfo packageInfo;
            try {
                packageInfo = manager.getPackageInfo(resolveInfo.activityInfo.packageName,
                    PackageManager.GET_SIGNATURES);
            } catch (NameNotFoundException e) {
                return null;
            }

            for (Signature signature : packageInfo.signatures) {
                for (String dbSignature : DROPBOX_APP_SIGNATURES) {
                    if (dbSignature.equals(signature.toCharsString())) {
                        return packageInfo;
                    }
                }
            }
        }

        return null;
    }
static PackageInfo getDropboxAppPackage ( Context context , Intent intent ) { PackageManager manager = context . getPackageManager ( ) ; List < ResolveInfo > infos = manager . queryIntentActivities ( intent , 0 ) ; if ( null == infos || 1 != infos . size ( ) ) { return null ; } else { ResolveInfo resolveInfo = manager . resolveActivity ( intent , 0 ) ; if ( resolveInfo == null ) { return null ; } final PackageInfo packageInfo ; try { packageInfo = manager . getPackageInfo ( resolveInfo . activityInfo . packageName , PackageManager . GET_SIGNATURES ) ; } catch ( NameNotFoundException e ) { return null ; } for ( Signature signature : packageInfo . signatures ) { for ( String dbSignature : DROPBOX_APP_SIGNATURES ) { if ( dbSignature . equals ( signature . toCharsString ( ) ) ) { return packageInfo ; } } } } return null ; }
Verify that intent will be processed by Dropbox App

@return PackageInfo of DropboxApp if Dropbox App can process intent, else null