Add ViennaCL cache support #82

- fix non existed dir issue
  works fine now ~10x faster after cache generation

- displays genrated genrated cache files to app log

Author: Daniil Efremov

app/src/main/java/openscience/crowdsource/video/experiments/MainActivity.java

@@ -763,7 +763,7 @@ protected String doInBackground(String... arg0) {
                     publishProgress("\nUnfortunately, no scenarios found for your device ...");
                     return null;
                 }
-
+                String localAppPath =  AppConfigService.getLocalAppPath() + File.separator + "openscience" + File.separator;
                 for (int i = 0; i < scenarios.length(); i++) {
                     JSONObject scenario = scenarios.getJSONObject(i);
                     final String module_uoa = scenario.getString("module_uoa");
@@ -845,7 +845,6 @@ public void println(String text) {
                                 // copyToAppSpace is not mandatory
                             }
                             if (copyToAppSpace != null && copyToAppSpace.equalsIgnoreCase("yes")) {
-                                String localAppPath =  AppConfigService.getLocalAppPath() + File.separator + "openscience" + File.separator;
                                 String fileAppDir = localAppPath + file.getString("path");
                                 File appfp = new File(fileAppDir);
                                 if (!appfp.exists()) {
@@ -937,7 +936,14 @@ public void println(String text) {
 
                     if (openCLlibPath != null) {
                         libPath = libPath + ":" + openCLlibPath;
-                        viennaclCachePath = AppConfigService.getLocalAppPath() + File.separator + "openscience" + File.separator + "viennacl_cache"+ File.separator;
+                        viennaclCachePath = localAppPath + File.separator + "viennacl_cache"+ File.separator;
+                        File appfp = new File(viennaclCachePath);
+                        if (!appfp.exists()) {
+                            if (!appfp.mkdirs()) {
+                                publishProgress("\nError creating dir (" + viennaclCachePath + ") ...");
+                                return null;
+                            }
+                        }
 
                     }
                     String[] scenarioEnv = {
@@ -1021,12 +1027,13 @@ public void run() {
                     publishProgress("\nRecognition result:" + recognitionRawResultText);
 
 
-
-                    String[] lsCacheResult = openme.openme_run_program("ls  " + viennaclCachePath, null, viennaclCachePath);
-                    if (!lsCacheResult [0].isEmpty()) {
-                        publishProgress(" * ViennaCL cache dir " + lsCacheResult[0]);
-                    } else {
-                        publishProgress("ViennaCL cache dir not inited ");
+                    if (viennaclCachePath != null && !viennaclCachePath.trim().equals("")) {
+                        String[] lsCacheResult = openme.openme_run_program("ls  " + viennaclCachePath, null, viennaclCachePath);
+                        if (!lsCacheResult [1].isEmpty()) {
+                            publishProgress("ViennaCL cache generated " + lsCacheResult[1]);
+                        } else {
+                            publishProgress("ViennaCL cache not generated");
+                        }
                     }