Removed unused code from FDroidApp.

From before content providers, where we rolled our own update notification
system for when data changed in the database. I also removed the property
"ctx", because it is availble in getApplicationContext(). As a general rule,
it is usually safer to not use a member field if not neccesary. That way,
there doesn't need to be any assumptions about when it is set and what value
it has. In this case, it was only set half way through onCreate, and therefore
usage before then would break.

src/org/fdroid/fdroid/FDroid.java

@@ -281,10 +281,6 @@ public class FDroid extends FragmentActivity {
             // check if the particular setting has actually been changed.
             UpdateService.schedule(getBaseContext());
 
-            if ((resultCode & PreferencesActivity.RESULT_RELOAD) != 0) {
-                ((FDroidApp) getApplication()).invalidateAllApps();
-            }
-
             if ((resultCode & PreferencesActivity.RESULT_RESTART) != 0) {
                 ((FDroidApp) getApplication()).reloadTheme();
                 final Intent intent = getIntent();

src/org/fdroid/fdroid/FDroidApp.java

@@ -129,13 +129,11 @@ public class FDroidApp extends Application {
             }
         }
 
-        invalidApps = new ArrayList<String>();
-        ctx = getApplicationContext();
-        UpdateService.schedule(ctx);
+        UpdateService.schedule(getApplicationContext());
 
-        ImageLoaderConfiguration config = new ImageLoaderConfiguration.Builder(ctx)
+        ImageLoaderConfiguration config = new ImageLoaderConfiguration.Builder(getApplicationContext())
             .discCache(new LimitedAgeDiscCache(
-                        new File(StorageUtils.getCacheDirectory(ctx, true),
+                        new File(StorageUtils.getCacheDirectory(getApplicationContext(), true),
                             "icons"),
                         new FileNameGenerator() {
                             @Override
@@ -170,8 +168,8 @@ public class FDroidApp extends Application {
              * compose a chain of trust managers as follows:
              * MemorizingTrustManager -> Pinning Trust Manager -> System Trust Manager
              */
-            PinningTrustManager pinMgr = new PinningTrustManager(SystemKeyStore.getInstance(ctx),FDroidCertPins.getPinList(), 0);
-            MemorizingTrustManager memMgr = new MemorizingTrustManager(ctx, pinMgr, defaultTrustManager);
+            PinningTrustManager pinMgr = new PinningTrustManager(SystemKeyStore.getInstance(getApplicationContext()),FDroidCertPins.getPinList(), 0);
+            MemorizingTrustManager memMgr = new MemorizingTrustManager(getApplicationContext(), pinMgr, defaultTrustManager);
 
             /*
              * initialize a SSLContext with the outermost trust manager, use this
@@ -189,29 +187,4 @@ public class FDroidApp extends Application {
         }
     }
 
-    private Context ctx;
-
-    // Set when something has changed (database or installed apps) so we know
-    // we should invalidate the apps.
-    private Semaphore appsInvalidLock = new Semaphore(1, false);
-    private List<String> invalidApps;
-
-    // Set apps invalid. Call this when the database has been updated with
-    // new app information, or when the installed packages have changed.
-    public void invalidateAllApps() {
-        try {
-            appsInvalidLock.acquire();
-        } catch (InterruptedException e) {
-            // Don't care
-        } finally {
-            appsInvalidLock.release();
-        }
-    }
-
-    // Invalidate a single app
-    public void invalidateApp(String id) {
-        Log.d("FDroid", "Invalidating "+id);
-        invalidApps.add(id);
-    }
-
 }

src/org/fdroid/fdroid/PreferencesActivity.java

@@ -36,7 +36,6 @@ import org.fdroid.fdroid.compat.ActionBarCompat;
 public class PreferencesActivity extends PreferenceActivity implements
         OnSharedPreferenceChangeListener {
 
-    public static final int RESULT_RELOAD = 1;
     public static final int RESULT_RESTART = 4;
     private int result = 0;
 
@@ -184,7 +183,6 @@ public class PreferencesActivity extends PreferenceActivity implements
     @Override
     public void onSharedPreferenceChanged(
             SharedPreferences sharedPreferences, String key) {
-
         updateSummary(key, true);
     }
 

src/org/fdroid/fdroid/data/RepoProvider.java

@@ -169,8 +169,6 @@ public class RepoProvider extends FDroidProvider {
             Uri appUri = AppProvider.getNoApksUri();
             int appCount = resolver.delete(appUri, null, null);
             Log.d("Log", "Removed " + appCount + " apps with no apks.");
-
-            app.invalidateAllApps();
         }
 
         public static int countAppsForRepo(Context context, long repoId) {