我正在开发一个项目来进行android开发，在我考虑从文本文件中读取数据之前对java有一些了解，这将被格式化为这样;
Type: House
Image link: www.bit.ly/image1
Name: Black
Download Link: www.bit.ly/image1download
----------
Type: Car
Image link: www.bit.ly/image2
Name: yellow
Download Link: www.bit.ly/image2download
----------
Type: Backyard
Image link: www.bit.ly/image3
Name: Green
Download Link: www.bit.ly/image3download
----------
Type: Window
Image link: www.bit.ly/image4
Name: Solid
Download Link: www.bit.ly/image4download
----------
Type: Table
Image link: www.bit.ly/image5
Name: Brown
Download Link: www.bit.ly/image5download
----------
数据包含每组4个信息，类型，图像，名称和下载。我需要一种阅读方式并将其保存/写入arraylist的方式，然后我可以在我的应用程序中显示的列表视图中显示。 （我目前正在查看有关创建listview的教程，如果您知道任何有用的教程，请告诉我们）
Arraylist <String> data = new ArrayList<String>();
Data.add(“House”,” www.bit.ly/image1”,”black”,”www.bit.ly/image1download”);
Data.add(“Car”,” www.bit.ly/image2”,”yellow”,” www.bit.ly/image2download”);
……..
……..
实际上会有更多的数据，然后只有5套，所以我想使用for循环遍历每个数据数据并将其添加到数据arraylist。
我不知道如何处理这个问题，欢迎任何帮助，我真的被困住了。如果我没有正确解释我的问题，请告诉我。
编辑：
这是从文本文件中读取数据的正确方法吗？
Scanner content = new Scanner(new File("Data.txt"));
ArrayList<String> data = new ArrayList<String>();
while (content.hasNext()){
data.add(content.next());
}
content.close();
或者这是android中的另一种方式
答案 0 :(得分：1)
这样定义一个setter getter类来保存并返回如下值：
Data.class
public class Data {
String type,Image,Name,Link ;
public Data() {
}
public String getType() {
return type;
}
public void setType(String type) {
this.type = type;
}
public String getImage() {
return Image;
}
public void setImage(String image) {
Image = image;
}
public String getName() {
return Name;
}
public void setName(String name) {
Name = name;
}
public String getLink() {
return Link;
}
public void setLink(String link) {
Link = link;
}
}
在arraylist中使用for循环集数据
Arraylist <Data> arrayListData = new ArrayList<Data>();
for(int i=0;i<arrayListData .size();i++){
Data data=new Data();
data.setType("");
...
...
...
arrayListData.add(data);
}
并从arraylist
String type= arrayListData.get(position).getType();
已更新：
像这样读取.txt文件，我假设您的文本文件保存在设备的SD卡中：
public void readfile() {
StringBuilder text = new StringBuilder();
File sdcard = Environment.getExternalStorageDirectory();
ArrayList<Data> arrayList=new ArrayList<Data>();
//Get the text file
File file = new File(sdcard,"textfile.txt");
//Read text from file
try {
BufferedReader br = new BufferedReader(new FileReader(file));
String line;
Data data=new Data();
while ((line = br.readLine()) != null) {
text.append(line);
text.append('\n');
if(line.contains(":")){
int index=line.indexOf(":");
String s=line.substring(index+1).trim();
if(line.contains("Type")){
data.setType(s);
}
if(line.contains("Image")){
data.setImage(s);
}
if(line.contains("Name")){
data.setName(s);
}
if(line.contains("Download")){
data.setLink(s);
}
}
if(line.contains("-")){
arrayList.add(data);
data=new Data();
}
}
System.out.println(text);
br.close();
}
catch (IOException e) {
e.printStackTrace();
}
}
答案 1 :(得分：1)
开始之前，请通过此链接阅读
How can I read a text file in Android?
根据您的需要使用PoJo模型，
像这样创建一个PoJo类
public class Film {
private String filmName;
private String mainStar;
public String getFilmName() {
return filmName;
}
public void setFilmName(String filmName) {
this.filmName = filmName;
}
public String getMainStar() {
return mainStar;
}
public void setMainStar(String mainStar) {
this.mainStar = mainStar;
}
}
创建ArrayList
private ArrayList<Film > filmArray=new ArrayList<Film>();
将每个arraylist存储为PoJo类的实例，如下所示
for(int i=0;i<sizei++)
{
Film film=new Film();
film.setFilmName("your value");
film.setMainStar("your value");
filmArray.add(film);
}
然后在 filmArray 列表中访问PoJo类的arraylist中的值列表。
简单而优雅的解决方案。
答案 2 :(得分：1)
这是解析器
public class FileParser {
private static final String DATA_TERMINATION = "----------";
private static final String TYPE="Type";
private static final String IMAGE="Image link";
private static final String NAME= "Name";
private static final String DWNLD_LNK= "Download Link";
public static void main(String[] args) {
FileParser parser = new FileParser();
try {
for(Data d:parser.parseDataFile(new File("F:\\data.txt"))){
System.out.println(TYPE+":"+d.getType());
System.out.println(IMAGE+":"+d.getImage());
System.out.println(NAME+":"+d.getName());
System.out.println(DWNLD_LNK+":"+d.getLink());
System.out.println(DATA_TERMINATION);
}
} catch (Exception e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
public List<Data> parseDataFile(File input) throws Exception{
List<Data> output =null;
List<String> fileOp= null;
try {
validateInput(input);
fileOp = readFile(input);
output = parseData(fileOp);
} catch (Exception e) {
throw e;
}
return output;
}
private List<Data> parseData(List<String> fileOp) {
List<Data> output =null;
output = new ArrayList<Data>();
Data data;
data = new Data();
for(String line:fileOp){
if(DATA_TERMINATION.equalsIgnoreCase(line)){
output.add(data);
data = new Data();
}else{
parseField(data,line);
}
}
return output;
}
private void parseField(Data data, String line) {
StringTokenizer tokenzr = new StringTokenizer(line,":");
if(tokenzr.countTokens() !=2){
System.out.println("Cant parse line"+line);
}else{
switch (tokenzr.nextToken()) {
case TYPE:
data.setType(tokenzr.nextToken());
break;
case IMAGE:
data.setImage(tokenzr.nextToken());
break;
case NAME:
data.setName(tokenzr.nextToken());
break;
case DWNLD_LNK:
data.setLink(tokenzr.nextToken());
break;
default:
break;
}
}
}
private List<String> readFile(File input) throws Exception {
BufferedReader reader = new BufferedReader(new InputStreamReader(new FileInputStream(input)));
String line = null;
List<String> op = new ArrayList<String>();
try {
while((line = reader.readLine()) != null){
op.add(line);
}
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
throw e;
}
return op;
}
private void validateInput(File input) throws Exception {
if(input == null){
throw new Exception("Null input");
}else if(!input.exists() || !input.isFile() || !input.canRead() ) {
throw new Exception("File not readable");
}
}
}