asynctask makes your code crawl

proguard.cfg

@@ -8,6 +8,11 @@
 -keepattributes *Annotation*
 -keep public class * extends android.app.Activity
 -keep public class * extends android.app.Service
+-keepclassmembers class * extends android.os.AsyncTask {
+	protected void onPreExecute();
+	public *** doInBackground(...);
+	protected void onPostExecute(...);
+}
 -keep public class * extends android.view.View {
 	public <init>(android.content.Context);
 	public <init>(android.content.Context, android.util.AttributeSet);

src/HubActivity.scala

@@ -5,7 +5,7 @@ import _root_.android.content._
 import _root_.android.database.Cursor
 import _root_.android.os.{Bundle, Handler}
 import _root_.android.util.Log
-import _root_.android.view.{Menu, MenuItem, View}
+import _root_.android.view.{Menu, MenuItem, View, Window}
 import _root_.android.widget.ListView
 
 class HubActivity extends ListActivity {
@@ -17,7 +17,9 @@ class HubActivity extends ListActivity {
 
 	override def onCreate(savedInstanceState: Bundle) {
 		super.onCreate(savedInstanceState)
+		requestWindowFeature(Window.FEATURE_INDETERMINATE_PROGRESS)
 		setContentView(R.layout.hubactivity)
+		setProgressBarIndeterminateVisibility(true)
 
 		getListView().setOnCreateContextMenuListener(this);
 

src/MyAsyncTask.java

@@ -0,0 +1,28 @@
+package org.aprsdroid.app;
+
+import android.os.AsyncTask;
+
+/**
+ * Temporary workaround to solve a Scala compiler issue which shows up
+ * at runtime with the error message
+ * "java.lang.AbstractMethodError: abstract method not implemented"
+ * for the missing method LookupTask.doInBackground(String... args).
+ *
+ * Our solution: the Java method doInBackground(String... args) forwards
+ * the call to the Scala method doInBackground1(String[] args).
+ */
+public abstract class MyAsyncTask<Progress, Result> extends AsyncTask<String, Progress, Result> {
+
+    protected abstract Result doInBackground1(String[] args);
+
+    @Override
+    protected Result doInBackground(String... args) {
+        String[] args1 = new String[args.length];
+        for (int i = 0; i < args.length; i++) {
+            args1[i] = args[i];
+        }
+        return doInBackground1(args1);
+    }
+
+}
+

src/PositionListAdapter.scala

@@ -1,8 +1,9 @@
 package org.aprsdroid.app
 
+import _root_.android.app.Activity
 import _root_.android.content._
 import _root_.android.database.Cursor
-import _root_.android.os.{Bundle, Handler}
+import _root_.android.os.{AsyncTask, Bundle, Handler}
 import _root_.android.text.format.DateUtils
 import _root_.android.util.Log
 import _root_.android.view.View
@@ -75,27 +76,10 @@ class PositionListAdapter(context : Context,
 		super.bindView(view, context, cursor)
 	}
 
-	def updateMyLocation(lat : Int, lon : Int) {
-		import PositionListAdapter._
-		my_lat = lat
-		my_lon = lon
-		val new_cursor = mode match {
-			case SINGLE	=> storage.getStaPositions(targetcall, "1")
-			case NEIGHBORS	=> storage.getNeighbors(mycall, my_lat, my_lon, System.currentTimeMillis - 30*60*1000, "20")
-			case SSIDS	=> storage.getAllSsids(targetcall)
-		}
-		changeCursor(new_cursor)
-	}
-
 	def reload() {
-		val cursor = storage.getStaPositions(mycall, "1")
-		if (cursor.getCount() > 0) {
-			cursor.moveToFirst()
-			my_lat = cursor.getInt(StorageDatabase.Position.COLUMN_LAT)
-			my_lon = cursor.getInt(StorageDatabase.Position.COLUMN_LON)
-		}
-		cursor.close()
-		updateMyLocation(my_lat, my_lon)
+		val qh = new QueryHandler()
+		// qh.execute(mycall, targetcall)
+		qh.onPostExecute(qh.doInBackground1(Array(mycall, targetcall)))
 	}
 
 	def onDestroy() {
@@ -103,4 +87,35 @@ class PositionListAdapter(context : Context,
 		changeCursor(null)
 	}
 
+	class QueryHandler extends MyAsyncTask[Unit, Cursor] {
+		override def doInBackground1(calls : Array[String]) : Cursor = {
+			import PositionListAdapter._
+			Benchmark("doInBackground1") {
+			val mycall = calls(0)
+			val targetcall = calls(1)
+			//var my_lat = 0
+			//var my_lon = 0
+			val cursor = storage.getStaPositions(mycall, "1")
+			if (cursor.getCount() > 0) {
+				cursor.moveToFirst()
+				my_lat = cursor.getInt(StorageDatabase.Position.COLUMN_LAT)
+				my_lon = cursor.getInt(StorageDatabase.Position.COLUMN_LON)
+			}
+			cursor.close()
+		}
+			mode match {
+				case SINGLE	=> storage.getStaPositions(targetcall, "1")
+				case NEIGHBORS	=> storage.getNeighbors(mycall, my_lat, my_lon,
+					System.currentTimeMillis - 30*60*1000, "20")
+				case SSIDS	=> storage.getAllSsids(targetcall)
+			}
+		}
+
+		override def onPostExecute(c : Cursor) {
+			Benchmark("changeCursor") {
+			changeCursor(c)
+		}
+			context.asInstanceOf[Activity].setProgressBarIndeterminateVisibility(false)
+		}
+	}
 }

src/StationActivity.scala

@@ -6,7 +6,7 @@ import _root_.android.database.Cursor
 import _root_.android.net.Uri
 import _root_.android.os.{Bundle, Handler}
 import _root_.android.util.Log
-import _root_.android.view.{Menu, MenuItem, View}
+import _root_.android.view.{Menu, MenuItem, View, Window}
 import _root_.android.view.View.OnClickListener
 import _root_.android.widget.{ListView,SimpleCursorAdapter}
 
@@ -26,7 +26,9 @@ class StationActivity extends ListActivity with OnClickListener {
 
 	override def onCreate(savedInstanceState: Bundle) {
 		super.onCreate(savedInstanceState)
+		requestWindowFeature(Window.FEATURE_INDETERMINATE_PROGRESS)
 		setContentView(R.layout.stationactivity)
+		setProgressBarIndeterminateVisibility(true)
 
 		getListView().setOnCreateContextMenuListener(this);