implement 'clear messages' for individual calls

res/menu/context_call.xml

@@ -1,6 +1,7 @@
 <menu xmlns:android="http://schemas.android.com/apk/res/android">
 	<item android:id="@+id/details" android:title="@string/app_sta" />
 	<item android:id="@+id/message" android:title="@string/app_messages" />
+	<item android:id="@+id/messagesclear" android:title="@string/app_messages_clear" />
 	<item android:id="@+id/mapbutton" android:title="@string/sta_map" />
 	<item android:id="@+id/aprsfibutton" android:title="@string/sta_aprsfi" />
 	<item android:id="@+id/qrzcombutton" android:title="@string/sta_qrzcom" />

res/values/strings.xml

@@ -7,6 +7,7 @@
 <string name="app_hub">APRSdroid Hub</string>
 <string name="app_sta">Station Info</string>
 <string name="app_messages">Messages</string>
+<string name="app_messages_clear">Clear Messages</string>
 <!-- APRSdroid activity -->
 <string name="firstrun">You need to configure APRSdroid with your callsign and passcode!</string>
 <string name="wrongpasscode">Your passcode does not match your callsign!</string>

src/StorageDatabase.scala

@@ -409,6 +409,10 @@ class StorageDatabase(context : Context) extends
 		c.close()
 		result
 	}
+	def deleteMessages(call : String) {
+		getWritableDatabase().execSQL("DELETE FROM %s WHERE %s = ?".format(Message.TABLE, Message.CALL),
+			Array(call))
+	}
 
 	def getConversations() = {
 		getReadableDatabase().query(Message.TABLE, Message.COLUMNS,

src/UIHelper.scala

@@ -32,6 +32,10 @@ trait UIHelper extends Activity
 		startActivity(new Intent(this, classOf[MessageActivity]).setData(Uri.parse(call)))
 	}
 
+	def clearMessages(call : String) {
+		new MessageCleaner(StorageDatabase.open(this), call).execute()
+	}
+
 	def openMessageSend(call : String, message : String) {
 		startActivity(new Intent(this, classOf[MessageActivity]).setData(Uri.parse(call)).putExtra("message", message))
 	}
@@ -291,6 +295,9 @@ trait UIHelper extends Activity
 		case R.id.message =>
 			openMessaging(targetcall)
 			true
+		case R.id.messagesclear =>
+			clearMessages(targetcall)
+			true
 		case R.id.mapbutton =>
 			trackOnMap(targetcall)
 			true
@@ -324,6 +331,16 @@ trait UIHelper extends Activity
 			sendBroadcast(new Intent(AprsService.UPDATE))
 		}
 	}
+	class MessageCleaner(storage : StorageDatabase, call : String) extends MyAsyncTask[Unit, Unit] {
+		override def doInBackground1(params : Array[String]) {
+			Log.d("MessageCleaner", "deleting...")
+			storage.deleteMessages(call)
+		}
+		override def onPostExecute(x : Unit) {
+			Log.d("MessageCleaner", "broadcasting...")
+			sendBroadcast(new Intent(AprsService.MESSAGE))
+		}
+	}
 }
 
 class UrlOpener(ctx : Context, url : String) extends DialogInterface.OnClickListener {