Merge "Load account type icons in a background thread before scrolling down" into klp-dev

src/com/android/settings/Settings.java

@@ -516,9 +516,11 @@ public class Settings extends PreferenceActivity
      */
     @Override
     public void onBuildHeaders(List<Header> headers) {
+        if (!onIsHidingHeaders()) {
             loadHeadersFromResource(R.xml.settings_headers, headers);
             updateHeaderList(headers);
         }
+    }
 
     private void updateHeaderList(List<Header> target) {
         final boolean showDev = mDevelopmentPreferences.getBoolean(
@@ -655,6 +657,7 @@ public class Settings extends PreferenceActivity
                 }
             }
             accountHeaders.add(accHeader);
+            mAuthenticatorHelper.preloadDrawableForType(this, accountType);
         }
 
         // Sort by label

src/com/android/settings/accounts/AuthenticatorHelper.java

@@ -23,6 +23,7 @@ import android.content.Context;
 import android.content.pm.PackageManager;
 import android.content.res.Resources;
 import android.graphics.drawable.Drawable;
+import android.os.AsyncTask;
 import android.util.Log;
 
 import java.util.ArrayList;
@@ -45,6 +46,16 @@ public class AuthenticatorHelper {
         return mEnabledAccountTypes.toArray(new String[mEnabledAccountTypes.size()]);
     }
 
+    public void preloadDrawableForType(final Context context, final String accountType) {
+        new AsyncTask<Void, Void, Void>() {
+            @Override
+            protected Void doInBackground(Void... params) {
+                getDrawableForType(context, accountType);
+                return null;
+            }
+        }.executeOnExecutor(AsyncTask.THREAD_POOL_EXECUTOR, (Void[]) null);
+    }
+
     /**
      * Gets an icon associated with a particular account type. If none found, return null.
      * @param accountType the type of account
@@ -52,15 +63,19 @@ public class AuthenticatorHelper {
      */
     public Drawable getDrawableForType(Context context, final String accountType) {
         Drawable icon = null;
+        synchronized (mAccTypeIconCache) {
             if (mAccTypeIconCache.containsKey(accountType)) {
                 return mAccTypeIconCache.get(accountType);
             }
+        }
         if (mTypeToAuthDescription.containsKey(accountType)) {
             try {
                 AuthenticatorDescription desc = mTypeToAuthDescription.get(accountType);
                 Context authContext = context.createPackageContext(desc.packageName, 0);
                 icon = authContext.getResources().getDrawable(desc.iconId);
+                synchronized (mAccTypeIconCache) {
                     mAccTypeIconCache.put(accountType, icon);
+                }
             } catch (PackageManager.NameNotFoundException e) {
             } catch (Resources.NotFoundException e) {
             }