如何在 Android 中获取文件的绝对路径? [英] How to Get Absolute Path in Android for File?

问题描述

btnimport.setOnClickListener(new View.OnClickListener() {

 @Override

 public void onClick(View v) {


 Intent fileintent = new Intent(Intent.ACTION_GET_CONTENT);

 fileintent.setType("*/*");

            try {

                startActivityForResult(fileintent, requestcode);

            } catch (ActivityNotFoundException e) {

            }
        }
    });`

我正在尝试在我的 Android 应用程序中导入 sky.csv 文件.

I'm trying to import sky.csv file in my Android application.

但是，当我选择文件时，我会得到:

But, when I select file, I'd get:

IO 异常:打开失败:ENOENT(没有那个文件或目录)

IO Exception : open failed: ENOENT (No such file or directory)

我将检查路径:

LOG > content://com.android.externalstorage.documents/document/38F0-D5E4%3ADCIM%2Fsky.csv我正在使用这种方法来获取路径`

LOG > content://com.android.externalstorage.documents/document/38F0-D5E4%3ADCIM%2Fsky.csv i'm using this method for getting path `

protected void onActivityResult(int requestCode, int resultCode, Intent data) 
{ 

if (data == null)

 return;

switch (requestCode) {

  case requestcode:

 Uri filepath1 = data.getData();

 String filepath = filepath1.toString();

请帮我解决这个问题.我尝试了很多方法.然而，我没有得到任何适当的解决方案.

Please help me with this. I have tried so many methods. I didn't get any proper solution, however.

推荐答案

您可能想尝试以下代码.它从设备的提供商处获取文件

You may want to try the codes below. It fetch files from device's providers

PathUtils.getPath(context, filepath1);

PathUtils.java 类在下面添加.

import android.content.ContentUris;
import android.content.Context;
import android.database.Cursor;
import android.net.Uri;
import android.os.Build;
import android.os.Environment;
import android.provider.DocumentsContract;
import android.provider.MediaStore;

public class PathUtils {

    public static String getPath(final Context context, final Uri uri) {

        // DocumentProvider
        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT && DocumentsContract.isDocumentUri(context, uri)) {

            if (isExternalStorageDocument(uri)) {// ExternalStorageProvider
                final String docId = DocumentsContract.getDocumentId(uri);
                final String[] split = docId.split(":");
                final String type = split[0];
                String storageDefinition;


                if("primary".equalsIgnoreCase(type)){

                    return Environment.getExternalStorageDirectory() + "/" + split[1];

                } else {

                    if(Environment.isExternalStorageRemovable()){
                        storageDefinition = "EXTERNAL_STORAGE";

                    } else{
                        storageDefinition = "SECONDARY_STORAGE";
                    }

                    return System.getenv(storageDefinition) + "/" + split[1];
                }

            } else if (isDownloadsDocument(uri)) {// DownloadsProvider

                final String id = DocumentsContract.getDocumentId(uri);
                final Uri contentUri = ContentUris.withAppendedId(
                        Uri.parse("content://downloads/public_downloads"), Long.valueOf(id));

                return getDataColumn(context, contentUri, null, null);

            } else if (isMediaDocument(uri)) {// MediaProvider
                final String docId = DocumentsContract.getDocumentId(uri);
                final String[] split = docId.split(":");
                final String type = split[0];

                Uri contentUri = null;
                if ("image".equals(type)) {
                    contentUri = MediaStore.Images.Media.EXTERNAL_CONTENT_URI;
                } else if ("video".equals(type)) {
                contentUri = MediaStore.Video.Media.EXTERNAL_CONTENT_URI;
                } else if ("audio".equals(type)) {
                    contentUri = MediaStore.Audio.Media.EXTERNAL_CONTENT_URI;
                }

                final String selection = "_id=?";
                final String[] selectionArgs = new String[]{
                        split[1]
                };

                return getDataColumn(context, contentUri, selection, selectionArgs);
            }

        } else if ("content".equalsIgnoreCase(uri.getScheme())) {// MediaStore (and general)

            // Return the remote address
            if (isGooglePhotosUri(uri))
                return uri.getLastPathSegment();

            return getDataColumn(context, uri, null, null);

        } else if ("file".equalsIgnoreCase(uri.getScheme())) {// File
            return uri.getPath();
        }

        return null;
    }

    public static String getDataColumn(Context context, Uri uri, String selection, String[] selectionArgs) {

        Cursor cursor = null;
        final String column = "_data";
        final String[] projection = {
                column
        };

        try {
            cursor = context.getContentResolver().query(uri, projection, selection, selectionArgs, null);
            if (cursor != null && cursor.moveToFirst()) {
                final int column_index = cursor.getColumnIndexOrThrow(column);
                return cursor.getString(column_index);
            }
        } finally {
            if (cursor != null)
                cursor.close();
        }
        return null;
    }


    public static boolean isExternalStorageDocument(Uri uri) {
        return "com.android.externalstorage.documents".equals(uri.getAuthority());
    }


    public static boolean isDownloadsDocument(Uri uri) {
        return "com.android.providers.downloads.documents".equals(uri.getAuthority());
    }

    public static boolean isMediaDocument(Uri uri) {
        return "com.android.providers.media.documents".equals(uri.getAuthority());
    }

    public static boolean isGooglePhotosUri(Uri uri) {
        return "com.google.android.apps.photos.content".equals(uri.getAuthority());
    }
}

这篇关于如何在 Android 中获取文件的绝对路径?的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！