private static final List<Pair<String, Long>> getInstalledLanguages(Context appContext) {
final List<Pair<String, Long>> result = new ArrayList<Pair<String, Long>>();
final File tessDir = Util.getTrainingDataDir(appContext);
if (!tessDir.exists()) {
return result;
}
final String[] languageFiles =
tessDir.list(
new FilenameFilter() {
@Override
public boolean accept(File dir, String filename) {
if (filename.endsWith(".traineddata")) {
return true;
}
return false;
}
});
for (final String val : languageFiles) {
final int dotIndex = val.indexOf('.');
if (dotIndex > -1) {
File f = new File(tessDir, val);
result.add(Pair.create(val.substring(0, dotIndex), f.length()));
}
}
return result;
}
/** @return if the language assets are installed or not */
public static boolean IsInstalled(Context appContext) {
// check directories
File tessDir = Util.getTrainingDataDir(appContext);
if (!tessDir.exists()) {
return false;
}
return true;
}
private boolean deleteLanguage(final OCRLanguage language) {
File tessDir = Util.getTrainingDataDir(OCRLanguageActivity.this);
if (!tessDir.exists()) {
return false;
}
File lang = new File(tessDir, language.mValue + ".traineddata");
final String[] list = getCubeFilesForLanguage(language.mValue, OCRLanguageActivity.this);
for (String fileName : list) {
File f = new File(tessDir, fileName);
f.delete();
}
if (lang.delete()) {
return true;
}
return false;
}
private static String[] getCubeFilesForLanguage(String language, final Context context) {
final String prefix = language + ".cube";
File tessDir = Util.getTrainingDataDir(context);
if (!tessDir.exists()) {
return new String[0];
}
final String[] list =
tessDir.list(
new FilenameFilter() {
@Override
public boolean accept(File dir, String filename) {
if (filename != null && filename.startsWith(prefix)) {
return true;
}
return false;
}
});
if (list == null) {
return new String[0];
} else {
return list;
}
}