streamline key detection, bump version

AndroidManifest.xml

@@ -1,8 +1,8 @@
 <?xml version="1.0" encoding="utf-8"?>
 <manifest xmlns:android="http://schemas.android.com/apk/res/android"
     package="org.fox.ttrss"
-    android:versionCode="122"
-    android:versionName="1.0" >
+    android:versionCode="123"
+    android:versionName="1.1" >
 
     <uses-sdk
         android:minSdkVersion="8"

res/values/strings.xml

@@ -151,4 +151,5 @@
     <string name="trial_purchase">Unlock full version</string>
     <string name="trial_expired">Trial expired</string>
     <string name="trial_expired_message">To continue using Tiny Tiny RSS please unlock the full version by purchasing the key.</string>
+    <string name="trial_thanks">Full version, thank you for support!</string>
 </resources>

src/org/fox/ttrss/OnlineActivity.java

@@ -25,6 +25,7 @@ import android.content.Intent;
 import android.content.IntentFilter;
 import android.content.SharedPreferences;
 import android.content.pm.PackageInfo;
+import android.content.pm.PackageManager;
 import android.database.Cursor;
 import android.net.Uri;
 import android.os.Bundle;
@@ -447,18 +448,8 @@ public class OnlineActivity extends CommonActivity {
 	}
 	
 	public void checkTrial(boolean notify) {
-		List<PackageInfo> pkgs = getPackageManager()
-				.getInstalledPackages(0);
-
-		boolean isTrial = true;
-		
-		for (PackageInfo p : pkgs) {
-			if ("org.fox.ttrss.key".equals(p.packageName)) {
-				//toast(R.string.donate_thanks);
-				isTrial = false;
-				break;
-			}
-		}
+		boolean isTrial = getPackageManager().checkSignatures(
+				getPackageName(), "org.fox.ttrss.key") != PackageManager.SIGNATURE_MATCH;
 
 		if (isTrial) {
 			long firstStart = m_prefs.getLong("date_firstlaunch_trial", -1);
@@ -509,6 +500,8 @@ public class OnlineActivity extends CommonActivity {
 					toast(getString(R.string.trial_mode_prompt, Long.valueOf(daysLeft)));
 				}
 			}
+		} else if (notify) {
+			toast(R.string.trial_thanks);
 		}
 	}