android - 如何删除FileNotFoundException:Android中的异常？

FilePath = / external / images / media / 2

出现错误：
java.io.FileNotFoundException：/ external / images / media / 2（无此类文件或目录）

你好
我正在尝试将所选图像上传到服务器上。出现此错误
java.io.FileNotFoundException：/ external / images / media / 2（没有这样的文件或目录）。实际上我正在模拟器上进行检查。首先我从图库中选择图像
然后获取所选图像的字节。但是我得到的错误文件未找到原因

这是我的代码：

package com.CA.xmlparsing;

import java.io.BufferedInputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;

import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.widget.Toast;


public class MainActivity extends Activity {

    private static final int PICKFILE_RESULT_CODE = 2;
    private String FilePath;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
    }

    public void upLoadImage(View view) {

        Intent intent = new Intent(Intent.ACTION_GET_CONTENT);
    intent.setType("*/*");
    intent.addCategory(Intent.CATEGORY_OPENABLE);

    try {
        startActivityForResult(
                Intent.createChooser(intent, "Select a File to Upload"),
                PICKFILE_RESULT_CODE);
    } catch (android.content.ActivityNotFoundException ex) {
        // Potentially direct the user to the Market with a Dialog
        Toast.makeText(this, "Please install a File Manager.",
                Toast.LENGTH_SHORT).show();
    }

    }  protected void onActivityResult(int requestCode, int resultCode, Intent data) {
        // TODO Fix no activity available
        if (data == null)
            return;
        switch (requestCode) {
        case PICKFILE_RESULT_CODE:
            if (resultCode == RESULT_OK) {
                 FilePath = data.getData().getPath();
                //FilePath is your file as a string
                Log.d("--------------", FilePath);
// print /external/images/media/2
                byte[] bytes=  getFileByte(FilePath);
                Log.d("--------------", ""+bytes);
            }
        }
    }

  private   byte [] getFileByte(String path){
         File file = new File(path);
            int size = (int) file.length();
            byte[] bytes = new byte[size];
            try {
// getting error on this line
                BufferedInputStream buf = new BufferedInputStream(new FileInputStream(file));
                buf.read(bytes, 0, bytes.length);
                buf.close();
            } catch (FileNotFoundException e) {
//catch here the error
                // TODO Auto-generated catch block
                e.printStackTrace();
            } catch (IOException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            }
            return bytes;
    }
}


<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:paddingBottom="@dimen/activity_vertical_margin"
    android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin"
    tools:context="com.CA.xmlparsing.MainActivity" >

 <Button
     android:layout_height="wrap_content"
     android:layout_width="wrap_content"
     android:text="uploadImage"
     android:onClick="upLoadImage" />

</RelativeLayout>

thar是否需要任何许可才能从模拟器读取图像？

最佳答案

您得到的不是文件系统的文件路径，而是mediastore等使用的媒体路径。为了获得真实的文件路径，您必须在媒体存储上调用游标。您可以在此站点上找到许多示例代码。

关于android - 如何删除FileNotFoundException:Android中的异常？，我们在Stack Overflow上找到一个类似的问题：https://stackoverflow.com/questions/26460842/