我有几个方面可能是我的问题的可能来源，我希望我只是愚蠢而忘记了一个小细节。但基本上我正在创建一个从数据（txt）文件读取并将其放入散列映射的应用程序，然后它使用该散列映射来获取与字符串一起的相应整数。如果你感到困惑，那么代码就更有意义了。
首先，当应用程序加载它时，调用它作为MainActivity类中的第一个方法之一，返回true或false的方法firstTime（）：
private boolean firstTime() {
//checks if the needed folders are in place
File storelist = new File(this.getFilesDir() + File.separator +"Stores");
File listnames = new File(this.getFilesDir() + File.separator +"Lists");
System.out.println("Store File: "+new File(storelist+File.separator + "Sample Fresh.txt").getAbsolutePath());
if(storelist.isDirectory() && listnames.isDirectory() && new File(storelist+File.separator + "Sample Fresh.txt").exists()){
return false;
}
else{
return true;
}
}
然后如果它返回true它会调用一个安装活动，并初始化一些文件，是的我知道整个数组输入的东西是一个很大的不，但它除了点（我希望）我正在尝试，因为暂时将所有文件保留在内部，很快我将转移到服务器设置，但作为样本/测试版，我不想这样做。以下方法generateSampleStore位于InstallActivity类中：
private File generateSampleStore(String path) {
File file = new File(path);
FileOutputStream fos = null;
try {
fos = new FileOutputStream(file,true);
} catch (FileNotFoundException e2) {
// TODO Auto-generated catch block
e2.printStackTrace();
}
String array[] = new String[56];
array[0] = "Store Fresh";
array[1] = "1234 Hickory Dr. Philadelphia Pa. 12345";
array[2] = "(123)-555-6789";
array[3] = "24 Hours";
array[4] = "Ketchup Aisle 1";
array[5] = "Salt Aisle 5";
array[6] = "Sugar Aisle 5";
array[7] = "Peanut Butter Aisle 5";
array[8] = "Vanilla Aisle 5";
array[9] = "Mustard Aisle 1";
array[10] = "Spaghetti Aisle 6";
array[11] = "Bananas Produce-Front Right";
array[12] = "Pam Aisle 5";
array[13] = "Frosted Flakes Aisle 4";
array[14] = "Bacon Deli-Back Right";
array[15] = "Eggs Dairy-Back Left";
array[16] = "Yogurt Dairy-Back Left";
array[17] = "Soy Sauce Aisle 7";
array[18] = "Coca Cola Aisle 3";
array[19] = "Coffee Aisle 3";
array[20] = "Tuna Aisle 1";
array[21] = "Pickles Deli-Back Right";
array[22] = "Hot Cocoa Aisle 5";
array[23] = "Steak Sauce Aisle 1";
array[24] = "All Spice Aisle 11";
array[25] = "Elbow Macaroni Aisle 6";
array[26] = "Lemon Juice Produce-Front Right";
array[27] = "Garlic Produce-Front Right";
array[28] = "Garlic Salt Aisle 5";
array[29] = "Cheese Dairy-Back Left";
array[30] = "Italian Dressing Aisle 1";
array[31] = "Onion Produce-Front Right";
array[32] = "Chicken Breasts Meat-Back Center";
array[33] = "Ranch Dressing Aisle 1";
array[34] = "Bread Crumbs Aisle 12";
array[35] = "Pancake Mix Aisle 5";
array[36] = "Cake Mix Aisle 5";
array[37] = "Apple Sauce Aisle 5";
array[38] = "Food Coloring Aisle 5";
array[39] = "Apples Produce-Front Right";
array[40] = "Potato Chips Aisle 4";
array[41] = "Salsa Aisle 7";
array[42] = "Ice Tea Aisle 3";
array[43] = "Corn Syrup Aisle 5";
array[44] = "Egg Noodles Aisle 6";
array[45] = "Butter Dairy-Back Left";
array[46] = "Whole Wheat Bread Aisle 12";
array[47] = "White Bread Aisle 12";
array[48] = "Frozen Peas Aisle 13";
array[49] = "Vanilla Ice Cream Aisle 15";
array[50] = "Chocolate Ice Cream Aisle 15";
array[51] = "Chrry Water Ice Aisle 15";
array[52] = "Shredded American Cheese Dairy-Back Left";
array[53] = "Whipped Cream Dairy-Back Left";
array[54] = "Ground Beef Meat-Back Center";
array[55] = "Frozen Pizza Aisle 14";
for(int i = 0 ; i < array.length; i ++){
try {
fos.write('\n');
} catch (IOException e1) {
// TODO Auto-generated catch block
e1.printStackTrace();
}
try {
fos.write(array[i].getBytes());
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
try {
fos.flush();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
try {
fos.close();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
return file;
}
然后用户点击“列表”选项卡，他们被带到列表名称菜单，一旦他们点击它调用类openList（）的列表，下面的方法是我得到错误的方法，没有堆栈跟踪，因为它不是编译错误，它只是做错了（逻辑可能）：
onCreate（）调用的相关部分：
try {
store = new ShoppingList(name, this).getStore();
} catch (IOException e1) {
// TODO Auto-generated catch block
e1.printStackTrace();
}
try {
items = getItems();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
if(!(store.equalsIgnoreCase("none"))){
try {
Aislenum = getAisleNumbers(new Store(store, this));
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
hasAislenums = true;
}else{
//do nothing
}
if(items[0] != null){
if(hasAislenums){
both = connectArrays(items, Aislenum);
setListAdapter(new ArrayAdapter<String>(this, R.layout.singleitem , both));
}else{
setListAdapter(new ArrayAdapter<String>(this, R.layout.singleitem , items));
}
}
else{
String New[] = new String[2];
New[0] = "This list is empty, add your first item";
New[1] = "by clicking the add button above";
setListAdapter(new ArrayAdapter<String>(this, R.layout.singleitem , New));
}
}
private String[] connectArrays(String[] item, String[] aislenum) {
String toReturn[] = new String[item.length];
for(int i = 0; i < item.length; i ++){
toReturn[i] = item[i] + " " + aislenum[i];
}
return toReturn;
}
getAisleNumbers方法：
private String[] getAisleNumbers(Store store) {
String num[] = new String[items.length];
for(int i = 0; i < items.length; i ++){
num[i] = store.getAisle(items[i]);
}
return num;
}
connectArrays方法：
private String[] connectArrays(String[] item, String[] aislenum) {
String toReturn[] = new String[item.length];
for(int i = 0; i < item.length; i ++){
toReturn[i] = item[i] + " " + aislenum[i];
}
return toReturn;
}
整个商店类：
package dev.shaw.MyShoppingPlanner;
import java.io.BufferedReader;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.InputStreamReader;
import java.util.HashMap;
import java.util.StringTokenizer;
import android.content.Context;
/*
* All store files must be written in the following format!
*
* Header:
*
* line 0: Store name
* line 1: Store address Format for address: ((#) Street name (rd.ln.,ave., etc.) city state zipcode
* line 2: phone number
* line 3: hours
*
* Item Formats:
*
* ItemName AisleNumber
* Cherios 9
*
*/
public class Store {
Dir dir = new Dir();
private static String storename;
private static File storefile;
private static HashMap<String, String> aislenums = new HashMap<String,String>();
public Store(String store, Context context) throws IOException {
File file = new File(context.getFilesDir() + File.separator + "Stores" +File.separator + store + ".txt");
storename = store;
if(file.exists()){
//do nothing
}else{
try {
file.createNewFile();
} catch (IOException e) {
e.printStackTrace();
}
}
storefile = file;
aislenums = intAilseNums();
}
private HashMap<String, String> intAilseNums() throws IOException {
System.out.println("Store File: "+storefile.getAbsolutePath());
HashMap<String, String> hm = new HashMap<String,String>();
FileInputStream fis = new FileInputStream(storefile);
InputStreamReader reader = new InputStreamReader(fis);
BufferedReader br = new BufferedReader(reader);
String line = "";
br.readLine();
br.readLine();
br.readLine();
br.readLine();
while(true){
line = br.readLine();
if(line == null){
System.out.println("Line is now null");
break;
}
StringTokenizer st = new StringTokenizer(line);
String item = "";
for(int i = 0; i < st.countTokens()- 2; i ++){
item = item + " " + st.nextToken();
}
String num = st.nextToken() + " " + st.nextToken();
hm.put(item, num);
}
/*br.reset();
System.out.println(br.readLine());*/
br.close();
return hm;
}
public String getAisle(String item){
return aislenums.get(item);
}
public String getName() throws IOException{
FileInputStream fis = new FileInputStream(storefile);
InputStreamReader is = new InputStreamReader(fis);
BufferedReader br = new BufferedReader(is);
return br.readLine();
}
public String getAddress() throws IOException{
String address = "";
FileInputStream fis = new FileInputStream(storefile);
InputStreamReader is = new InputStreamReader(fis);
BufferedReader br = new BufferedReader(is);
br.readLine();
address = br.readLine();
br.close();
return address;
}
public String getStreetName() throws IOException{
String name = "";
FileInputStream fis = new FileInputStream(storefile);
InputStreamReader is = new InputStreamReader(fis);
BufferedReader br = new BufferedReader(is);
br.readLine();
String line = br.readLine();
StringTokenizer st = new StringTokenizer(line);
st.nextToken();
name = st.nextToken() + " " + st.nextToken();
br.close();
return name;
}
public String getCity() throws IOException{
String city = "";
FileInputStream fis = new FileInputStream(storefile);
InputStreamReader is = new InputStreamReader(fis);
BufferedReader br = new BufferedReader(is);
br.readLine();
String line = br.readLine();
StringTokenizer st = new StringTokenizer(line);
st.nextToken();
st.nextToken();
st.nextToken();
city = st.nextToken();
br.close();
return city;
}
public String getState() throws IOException{
String state = "";
FileInputStream fis = new FileInputStream(storefile);
InputStreamReader is = new InputStreamReader(fis);
BufferedReader br = new BufferedReader(is);
br.readLine();
String line = br.readLine();
StringTokenizer st = new StringTokenizer(line);
st.nextToken();
st.nextToken();
st.nextToken();
st.nextToken();
state = st.nextToken();
br.close();
return state;
}
public String getZipCodeAsString() throws IOException{
String zipcode = "";
FileInputStream fis = new FileInputStream(storefile);
InputStreamReader is = new InputStreamReader(fis);
BufferedReader br = new BufferedReader(is);
br.readLine();
String line = br.readLine();
StringTokenizer st = new StringTokenizer(line);
st.nextToken();
st.nextToken();
st.nextToken();
st.nextToken();
st.nextToken();
zipcode = st.nextToken();
br.close();
return zipcode;
}
public int getZipCodeAsInteger() throws IOException{
int zipcode = 0;
FileInputStream fis = new FileInputStream(storefile);
InputStreamReader is = new InputStreamReader(fis);
BufferedReader br = new BufferedReader(is);
br.readLine();
String line = br.readLine();
StringTokenizer st = new StringTokenizer(line);
st.nextToken();
st.nextToken();
st.nextToken();
st.nextToken();
st.nextToken();
zipcode = Integer.parseInt(st.nextToken());
br.close();
return zipcode;
}
public String getPhoneNumber() throws IOException{
String num = "";
FileInputStream fis = new FileInputStream(storefile);
InputStreamReader is = new InputStreamReader(fis);
BufferedReader br = new BufferedReader(is);
br.readLine();
br.readLine();
num = br.readLine();
br.close();
return num;
}
public static File getFile(){
return storefile;
}
public String getHours() throws IOException{
FileInputStream fis = new FileInputStream(storefile);
InputStreamReader is = new InputStreamReader(fis);
BufferedReader br = new BufferedReader(is);
br.readLine();
br.readLine();
br.readLine();
String hours = br.readLine();
br.close();
return hours;
}
}