资产文件目录给出java.io.FileNotFoundException eclipse

Question

我的资产文件夹中有一个xls文件,我想用jexcelapi库打开它.我已经将文件的路径设置为("file:///android_asset/jxlrwtest.xls"),甚至尝试使用New-> File在我的根文件夹中创建一个具有不同名称的xls文件并直接访问它但仍然是我每次运行模拟器时都会收到错误java.io.FileNotFoundException"(没有这样的文件或目录)".我还确保每次尝试移动文件时都刷新路径.我读完excel文件的全班都是

package com.example.kirikedictionary;

import java.io.File;
import java.io.IOException;

import android.app.Activity;
import android.content.Context;

import jxl.Cell;
import jxl.CellType;
import jxl.Sheet;
import jxl.Workbook;
import jxl.read.biff.BiffException;

public class ReadExcel {

  private String inputFile;
  protected Context context;

  public ReadExcel(Context context){
      this.context = context.getApplicationContext();
  }


  public void setInputFile(String inputFile) {
    this.inputFile = inputFile;
  }

  public void read() throws IOException  {
    File inputWorkbook = new File(inputFile);
    Workbook w;
    try {
      w = Workbook.getWorkbook(inputWorkbook);
      // Get the first sheet
      Sheet sheet = w.getSheet(0);
      // Loop over first 10 column and lines

      for (int j = 0; j < sheet.getColumns(); j++) {
        for (int i = 0; i < sheet.getRows(); i++) {
          Cell cell = sheet.getCell(j, i);
          CellType type = cell.getType();
          if (type == CellType.LABEL) {
            System.out.println("I got a label "
                + cell.getContents());
          }

          if (type == CellType.NUMBER) {
            System.out.println("I got a number "
                + cell.getContents());
          }

        }
      }
    } catch (BiffException e) {
      e.printStackTrace();
    }
  }

  public void main(String[] args) throws IOException {
    ReadExcel test = new ReadExcel(context);
    test.setInputFile("file:///android_asset/jxlrwtest.xls");
    test.read();
  }

} 

而我一直得到的错误是

12-30 01:36:59.386:W/System.err(1851):java.io.FileNotFoundException:file:/android_asset/jxlrwtest.xls:open failed:ENOENT(没有这样的文件或目录)12-30 01:36 :59.393:W/System.err(1851):at libcore.io.IoBridge.open(IoBridge.java:456)12-30 01:36:59.393:W/System.err(1851):at java.io. FileInputStream.(FileInputStream.java:76)12-30 01:36:59.394:W/System.err(1851):at jxl.Workbook.getWorkbook(Workbook.java:213)12-30 01:36:59.394:W /System.err(1851):at jxl.Workbook.getWorkbook(Workbook.java:198)12-30 01:36:59.394:W/System.err(1851):at com.example.kirikedictionary.ReadExcel.read( ReadExcel.java:33)12-30 01:36:59.394:W/System.err(1851):at com.example.kirikedictionary.ReadExcel.main(ReadExcel.java:62)12-30 01:36:59.394: W/System.err(1851):at com.example.kirikedictionary.MainActivity $ 3.onItemClick(MainActivity.java:148)12-30 01:36:59.394:W/System.err(1851):at android.widget. AdapterView.performItemClick(AdapterView.java:300)12-30 01:36:59.395:W/System.err(1851):at androi d.widget.AbsListView.performItemClick(AbsListView.java:1143)12-30 01:36:59.416:W/System.err(1851):at android.widget.AbsListView $ PerformClick.run(AbsListView.java:3044)12 -30 01:36:59.416:W/System.err(1851):在android.widget.AbsListView $ 3.run(AbsListView.java:3833)12-30 01:36:59.416:W/System.err(1851) :在android.os.Handler.handleCallback(Handler.java:739)12-30 01:36:59.417:W/System.err(1851):at android.os.Handler.dispatchMessage(Handler.java:95)12 -30 01:36:59.432:W/System.err(1851):在android.os.Looper.loop(Looper.java:135)12-30 01:36:59.432:W/System.err(1851):在android.app.ActivityThread.main(ActivityThread.java:5221)12-30 01:36:59.432:W/System.err(1851):at java.lang.reflect.Method.invoke(Native Method)12-30 01:36:59.432:W/System.err(1851):at java.lang.reflect.Method.invoke(Method.java:372)12-30 01:36:59.433:W/System.err(1851):在com.android.internal.os.ZygoteInit $ MethodAndArgsCaller.run(ZygoteInit.java:899)12-30 01:36:59.433:W/System.err(1851):at com.andr oid.internal.os.ZygoteInit.main(ZygoteInit.java:694)12-30 01:36:59.433:W/System.err(1851):引起:android.system.ErrnoException:open failed:ENOENT(没有这样的文件或目录)12-30 01:36:59.434:W/System.err(1851):at libcore.io.Posix.open(Native Method)12-30 01:36:59.435:W/System.err(1851) ):在libcore.io.BlockGuardOs.open(BlockGuardOs.java:186)12-30 01:36:59.451:W/System.err(1851):at libcore.io.IoBridge.open(IoBridge.java:442) 12-30 01:36:59.452:W/System.err(1851):......还有18个

请帮助,因为我不想使用外部SD卡文件,我已经被困在这里一段时间.

Answer 1

您只能将file:/// android_asset/someName用作WebView的URL.它不是文件系统识别的文件名.

使用Context.getAssets获取AssetManger实例,并使用AssetManager.open获取资产文件的InputStream.

如果需要提供File实例,请将资产中的文件复制到应用程序的私有目录中.