我做了這個方法,它讀取一個csv文件,並將數據存儲到包含在地圖中的ArrayList。Map..This方法在java中單獨運行。但是當我在android中實現它時,它didn工作和應用程序崩潰..我一直試圖解決它所以任何幫助非常感謝謝謝..以下是我嘗試在Android中使用此方法通過讀取SD卡中的csv文件。當我使用get方法時,它似乎崩潰了。在下面你可以看到logcat。閱讀文件Android
public class New extends Activity {
private static Map<String, List<String>> values;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
try {
FileReader fr = new FileReader(Environment.getExternalStorageDirectory() + "/" + "Android/data/"
+ getPackageName().toString()+ "/" + "SOPARC.csv");
values = parseCsv(fr, ",", true);
} catch (IOException e) {
e.printStackTrace();
}
values.get("Date").get(2);
}
public static Map<String, List<String>> parseCsv(Reader reader, String separator, boolean hasHeader) throws IOException {
Map<String, List<String>> values = new LinkedHashMap<String, List<String>>();
List<String> columnNames = new LinkedList<String>();
BufferedReader br = null;
br = new BufferedReader(reader);
String line;
int numLines = 0;
while ((line = br.readLine()) != null) {
if (StringUtils.isNotBlank(line)) {
if (!line.startsWith("#")) {
String[] tokens = line.split(separator);
if (tokens != null) {
for (int i = 0; i < tokens.length; ++i) {
if (numLines == 0) {
columnNames.add(hasHeader ? tokens[i] : ("row_"+i));
} else {
List<String> column = values.get(columnNames.get(i));
if (column == null) {
column = new LinkedList<String>();
}
column.add(tokens[i]);
values.put(columnNames.get(i), column);
}
}
}
++numLines;
}
}
}
return values;
}
後堆棧跟蹤誤差..或試試這個: http://code.google.com/p/secrets-for-android/source/browse/trunk/src/au/com/bytecode/ opencsv/CSVReader.java – Davide 2014-08-29 19:31:16
這是否有幫助? – user3156801 2014-08-29 19:58:12
看起來不相關。 – auselen 2014-08-29 20:06:40