Surpport the different character encodings for lyrics files.

app/build.gradle

@@ -130,6 +130,7 @@ dependencies {
     implementation('com.crashlytics.sdk.android:answers:1.3.13@aar') {
         transitive = true
     }
+    implementation 'com.googlecode.juniversalchardet:juniversalchardet:1.0.3'
     testImplementation 'junit:junit:4.12'
     annotationProcessor 'com.jakewharton:butterknife-compiler:8.8.1'
 }

app/src/main/java/com/kabouzeid/gramophone/App.java

@@ -77,7 +77,8 @@ public void onBillingInitialized() {
     }
 
     public static boolean isProVersion() {
-        return BuildConfig.DEBUG || app.billingProcessor.isPurchased(PRO_VERSION_PRODUCT_ID);
+
+        //return BuildConfig.DEBUG || app.billingProcessor.isPurchased(PRO_VERSION_PRODUCT_ID);
     }
 
     public static App getInstance() {

app/src/main/java/com/kabouzeid/gramophone/util/FileUtil.java

@@ -11,13 +11,16 @@
 import com.kabouzeid.gramophone.loader.SortedCursor;
 import com.kabouzeid.gramophone.model.Song;
 
+import org.mozilla.universalchardet.UniversalDetector;
+
 import java.io.BufferedReader;
 import java.io.File;
 import java.io.FileFilter;
 import java.io.FileInputStream;
 import java.io.IOException;
 import java.io.InputStream;
 import java.io.InputStreamReader;
+import java.nio.charset.Charset;
 import java.util.ArrayList;
 import java.util.Collection;
 import java.util.Collections;
@@ -179,13 +182,51 @@ public static String readFromStream(InputStream is) throws Exception {
         return sb.toString();
     }
 
+    public static String readFromStream(InputStream is, Charset charset) throws Exception {
+        BufferedReader reader = new BufferedReader(new InputStreamReader(is, charset));
+        StringBuilder sb = new StringBuilder();
+        String line;
+        while ((line = reader.readLine()) != null) {
+            if (sb.length() > 0) sb.append("\n");
+            sb.append(line);
+        }
+        reader.close();
+        return sb.toString();
+    }
+
     public static String read(File file) throws Exception {
         FileInputStream fin = new FileInputStream(file);
         String ret = readFromStream(fin);
         fin.close();
         return ret;
     }
 
+    public static String readWithCharsetDet(File file) throws Exception {
+        //Detect the charset of the file
+        FileInputStream finForDet = new FileInputStream(file);
+        UniversalDetector detector = new UniversalDetector(null);
+        int nread;
+        byte[] buf = new byte[4096];
+        while ((nread = finForDet.read(buf)) > 0 && !detector.isDone()) {
+            detector.handleData(buf, 0, nread);
+        }
+        detector.dataEnd();
+        String encoding = detector.getDetectedCharset();
+        detector.reset();
+
+        Charset charset;
+        if(encoding == null){
+            charset = Charset.forName("UTF-8");
+        }else {
+            charset = Charset.forName(encoding);
+        }
+
+        FileInputStream fin = new FileInputStream(file);
+        String ret = readFromStream(fin, charset);
+        fin.close();
+        return ret;
+    }
+
     public static String safeGetCanonicalPath(File file) {
         try {
             return file.getCanonicalPath();

app/src/main/java/com/kabouzeid/gramophone/util/MusicUtil.java

@@ -328,7 +328,7 @@ public static String getLyrics(Song song) {
                 if (files != null && files.length > 0) {
                     for (File f : files) {
                         try {
-                            String newLyrics = FileUtil.read(f);
+                            String newLyrics = FileUtil.readWithCharsetDet(f);
                             if (newLyrics != null && !newLyrics.trim().isEmpty()) {
                                 if (AbsSynchronizedLyrics.isSynchronized(newLyrics)) {
                                     return newLyrics;