统计下载出错log

app/src/main/java/com/gh/download/DownloadEntity.java

@@ -195,7 +195,21 @@ public class DownloadEntity implements Serializable {
 	public void setSpeed(long speed) {
 		this.speed = speed;
 	}
-	
+
+	public String getError() {
+		if (meta != null) {
+			return meta.get("error");
+		}
+		return null;
+	}
+
+	public void setError(String error) {
+		if (meta == null) {
+			meta = new HashMap<>();
+		}
+		meta.put("error", error);
+	}
+
 	public HashMap<String, String> getMeta() {
 		return meta;
 	}