[JAVA] Android CSV library

Java library I thought I could use anything on Android. It wasn't, so I'll summarize it.

Open CSV

Decompose with commas to make an array of character strings and get them in the order.

http://opencsv.sourceforge.net/

Sample program here https://github.com/ohwada/Android_Samples/tree/master/Csv1

A file with a header line like the one below Also has the ability to map to Java objects.

"Name","Quantity"
"Apple", "10"
"Banana", "20"

However, on Android, the following error occurs.

NoClassDefFoundError: Failed resolution of: Ljava/beans/Introspector

Android doesn't seem to have the required libraries.

Reference: [Didn't find class “java.beans.Introspector” when Using OpenCSV to parse csv files](https://stackoverflow.com/questions/50173340/didnt-find-class-java-beans-introspector-when- using-opencsv-to-parse-csv-file)

univocity-parsers

Has the ability to map CSV files to Java objects.

https://www.univocity.com/pages/univocity_parsers_tutorial

How to use

Prepare a Java class that matches the columns of the CSV file. Specify the correspondence between columns and variables with annotations.

@Data
public class Hoge {

@Parsed(field = "Name")
public String name = "";

@Parsed(field = "Quantity")
public int quantity = 0;

Read CSV file

    //When reading from the Asset folder
    Reader reader = new InputStreamReader( getAssets().open(file name) );

        CsvParserSettings settings = new CsvParserSettings();
    BeanListProcessor<Shopping> rowProcessor = new BeanListProcessor<>(Hoge.class);
        settings.setProcessor(rowProcessor);

 CsvRoutines routines = new CsvRoutines(settings);
List<Hoge> list
 = routines.parseAll( Hoge.class,  reader );

Sample program here https://github.com/ohwada/Android_Samples/tree/master/Csv2

Apache Commons CSV

Decompose with commas to make an array of character strings and get them in the order.

https://commons.apache.org/proper/commons-csv/

Sample program here https://github.com/ohwada/Android_Samples/tree/master/Csv3