Fix live crash

app/src/main/java/com/fongmi/android/tv/api/LiveConfig.java

@@ -176,7 +176,7 @@ public class LiveConfig {
     }
 
     public void setKeep(Channel channel) {
-        if (channel.getGroup().isHidden() || home == null) return;
+        if (home == null || channel.getGroup().isHidden() || channel.getUrls().isEmpty()) return;
         Prefers.putKeep(home.getName() + AppDatabase.SYMBOL + channel.getGroup().getName() + AppDatabase.SYMBOL + channel.getName() + AppDatabase.SYMBOL + channel.getCurrent());
     }
 

app/src/main/java/com/fongmi/android/tv/bean/Channel.java

@@ -197,7 +197,7 @@ public class Channel {
     }
 
     public String getCurrent() {
-        return getUrls().get(getLine());
+        return getUrls().isEmpty() ? "" : getUrls().get(getLine());
     }
 
     public boolean isOnly() {
@@ -205,7 +205,7 @@ public class Channel {
     }
 
     public boolean isLast() {
-        return getLine() == getUrls().size() - 1;
+        return getUrls().isEmpty() || getLine() == getUrls().size() - 1;
     }
 
     public String getLineText() {