android 读取手机本地文件中.txt，.doc，.docx 文件的内容

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android 读取手机本地文件中.txt，.doc，.docx 文件的内容

2024-07-07 22:28| 来源: 网络整理| 查看: 265

获取本地文件的路径兼容Android 11

import android.content.ContentResolver; 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.os.FileUtils; import android.provider.DocumentsContract; import android.provider.MediaStore; import android.provider.OpenableColumns; import android.text.TextUtils; import android.util.Log; import androidx.annotation.RequiresApi; import java.io.BufferedInputStream; import java.io.BufferedOutputStream; import java.io.File; import java.io.FileOutputStream; import java.io.IOException; import java.io.InputStream; import java.io.OutputStream; public class GetFilePathFromUri { /** * 根据Uri获取文件绝对路径，解决Android4.4以上版本Uri转换兼容Android 10 * * @param context * @param imageUri */ public static String getFileAbsolutePath(Context context, Uri imageUri) { if (context == null || imageUri == null) { return null; } //4.4以下的版本 if (android.os.Build.VERSION.SDK_INT < android.os.Build.VERSION_CODES.KITKAT) { return getRealFilePath(context, imageUri); } //大于4.4，小于10 if (android.os.Build.VERSION.SDK_INT >= android.os.Build.VERSION_CODES.KITKAT && android.os.Build.VERSION.SDK_INT < Build.VERSION_CODES.Q && DocumentsContract.isDocumentUri(context, imageUri)) { if (isExternalStorageDocument(imageUri)) { String docId = DocumentsContract.getDocumentId(imageUri); String[] split = docId.split(":"); String type = split[0]; if ("primary".equalsIgnoreCase(type)) { return Environment.getExternalStorageDirectory() + "/" + split[1]; } } else if (isDownloadsDocument(imageUri)) { String id = DocumentsContract.getDocumentId(imageUri); Uri contentUri = ContentUris.withAppendedId(Uri.parse("content://downloads/public_downloads"), Long.valueOf(id)); return getDataColumn(context, contentUri, null, null); } else if (isMediaDocument(imageUri)) { String docId = DocumentsContract.getDocumentId(imageUri); String[] split = docId.split(":"); 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; } String selection = MediaStore.Images.Media._ID + "=?"; String[] selectionArgs = new String[]{split[1]}; return getDataColumn(context, contentUri, selection, selectionArgs); } } // MediaStore (and general) 大于等于10 if (android.os.Build.VERSION.SDK_INT >= Build.VERSION_CODES.Q){ return uriToFileApiQ(context,imageUri); } else if ("content".equalsIgnoreCase(imageUri.getScheme())) { // Return the remote address if (isGooglePhotosUri(imageUri)) { return imageUri.getLastPathSegment(); } if (Build.VERSION.SDK_INT >= 24) { return getFilePathFromUri(context,imageUri); //content 类型 }else { return getDataColumn(context, imageUri, null, null); } } // File else if ("file".equalsIgnoreCase(imageUri.getScheme())) { return imageUri.getPath(); } return null; } private static String getRealFilePath(final Context context, final Uri uri) { if (null == uri) { return null; } final String scheme = uri.getScheme(); String data = null; if (scheme == null) { data = uri.getPath(); } else if (ContentResolver.SCHEME_FILE.equals(scheme)) { data = uri.getPath(); } else if (ContentResolver.SCHEME_CONTENT.equals(scheme)) { String[] projection = {MediaStore.Images.ImageColumns.DATA}; Cursor cursor = context.getContentResolver().query(uri, projection, null, null, null); if (null != cursor) { if (cursor.moveToFirst()) { int index = cursor.getColumnIndex(MediaStore.Images.ImageColumns.DATA); if (index > -1) { data = cursor.getString(index); } } cursor.close(); } } return data; } /** * @param uri The Uri to check. * @return Whether the Uri authority is ExternalStorageProvider. */ private static boolean isExternalStorageDocument(Uri uri) { return "com.android.externalstorage.documents".equals(uri.getAuthority()); } /** * @param uri The Uri to check. * @return Whether the Uri authority is DownloadsProvider. */ private static boolean isDownloadsDocument(Uri uri) { return "com.android.providers.downloads.documents".equals(uri.getAuthority()); } private static String getDataColumn(Context context, Uri uri, String selection, String[] selectionArgs) { Cursor cursor = null; String column = MediaStore.Images.Media.DATA; String[] projection = {column}; try { cursor = context.getContentResolver().query(uri, projection, selection, selectionArgs, null); if (cursor != null && cursor.moveToFirst()) { int index = cursor.getColumnIndexOrThrow(column); return cursor.getString(index); } } finally { if (cursor != null) { cursor.close(); } } return null; } /** * @param uri The Uri to check. * @return Whether the Uri authority is MediaProvider. */ private static boolean isMediaDocument(Uri uri) { return "com.android.providers.media.documents".equals(uri.getAuthority()); } /** * @param uri The Uri to check. * @return Whether the Uri authority is Google Photos. */ private static boolean isGooglePhotosUri(Uri uri) { return "com.google.android.apps.photos.content".equals(uri.getAuthority()); } /** * Android 10 以上适配另一种写法 * @param context * @param uri * @return */ private static String getFileFromContentUri(Context context, Uri uri) { if (uri == null) { return null; } String filePath; String[] filePathColumn = {MediaStore.MediaColumns.DATA, MediaStore.MediaColumns.DISPLAY_NAME}; ContentResolver contentResolver = context.getContentResolver(); Cursor cursor = contentResolver.query(uri, filePathColumn, null, null, null); if (cursor != null) { cursor.moveToFirst(); try { filePath = cursor.getString(cursor.getColumnIndex(filePathColumn[0])); return filePath; } catch (Exception e) { } finally { cursor.close(); } } return ""; } /** * Android 10 以上适配 * @param context * @param uri * @return */ @RequiresApi(api = Build.VERSION_CODES.Q) private static String uriToFileApiQ(Context context, Uri uri) { File file = null; //android10以上转换 if (uri.getScheme().equals(ContentResolver.SCHEME_FILE)) { file = new File(uri.getPath()); } else if (uri.getScheme().equals(ContentResolver.SCHEME_CONTENT)) { //把文件复制到沙盒目录 ContentResolver contentResolver = context.getContentResolver(); Cursor cursor = contentResolver.query(uri, null, null, null, null); if (cursor.moveToFirst()) { String displayName = cursor.getString(cursor.getColumnIndex(OpenableColumns.DISPLAY_NAME)); try { InputStream is = contentResolver.openInputStream(uri); File file1 = new File(context.getExternalCacheDir().getAbsolutePath()+"/"+System.currentTimeMillis()); if (!file1.exists()) { file1.mkdir(); } File cache = new File(file1.getPath(), displayName); FileOutputStream fos = new FileOutputStream(cache); FileUtils.copy(is, fos); file = cache; fos.close(); is.close(); } catch (IOException e) { e.printStackTrace(); } } } return file.getAbsolutePath(); } private static String getFilePathFromUri(Context context,Uri uri) { String realFilePath = getRealFilePath(context,uri); //防止获取不到真实的地址，因此这里需要进行判断 if (!TextUtils.isEmpty(realFilePath)) { return realFilePath; } File filesDir = context.getApplicationContext().getFilesDir(); String fileName = getFileName(uri); if (!TextUtils.isEmpty(fileName)) { File copyFile1 = new File(filesDir + File.separator + fileName); copyFile(context,uri,copyFile1); return copyFile1.getAbsolutePath(); } return null; } private static String getFileName(Uri uri) { if (uri == null) { return null; } String fileName = null; String path = uri.getPath(); int cut = path.lastIndexOf('/'); if (cut != -1) { fileName = path.substring(cut+1); } return fileName; } private static void copyFile(Context context, Uri srcUri, File dstFile) { try { InputStream inputStream = context.getContentResolver().openInputStream(srcUri); if (inputStream == null) { return; } OutputStream outputStream = new FileOutputStream(dstFile); copyStream(inputStream, outputStream); inputStream.close(); outputStream.close(); } catch (Exception e) { e.printStackTrace(); } } private static int copyStream(InputStream input, OutputStream output){ final int BUFFER_SIZE = 1024 * 2; byte[] buffer = new byte[BUFFER_SIZE]; BufferedInputStream in = new BufferedInputStream(input, BUFFER_SIZE); BufferedOutputStream out = new BufferedOutputStream(output, BUFFER_SIZE); int count = 0, n = 0; try { while ((n = in.read(buffer, 0, BUFFER_SIZE)) != -1) { out.write(buffer, 0, n); count += n; } out.flush(); } catch (Exception e) { }finally { try { out.close(); in.close(); } catch (Exception e) { } } return count; } }

亲测后才发的文章：

//读取指定目录下的所有TXT文件的文件内容 protected String getFileContent(File file) { String content = ""; if (file.isDirectory()) { //检查此路径名的文件是否是一个目录(文件夹) Log.i("zeng", "The File doesn't not exist " + file.getName().toString() + file.getPath().toString()); } else { if (file.getName().endsWith(".txt")||file.getName().endsWith(".doc")) {//文件格式为txt文件 try { InputStream instream = new FileInputStream(file); if (instream != null) { InputStreamReader inputreader = new InputStreamReader(instream, "GBK"); BufferedReader buffreader = new BufferedReader(inputreader); String line = ""; //分行读取 while ((line = buffreader.readLine()) != null) { content += line + "\n"; } instream.close(); //关闭输入流 } } catch (FileNotFoundException e) { Log.d("TestFile", "The File doesn't not exist."); } catch (IOException e) { Log.d("TestFile", e.getMessage()); } } } return content; } /** * 读取word内容 * * @param */ public static String readDoc(String path) { String content = ""; try { FileInputStream in = new FileInputStream(path); //PoiFs 主要类管理整个文件系统生命周期 POIFSFileSystem pfs = new POIFSFileSystem(in); //获取文档所有的数据结构可以说是一个“文档对象” HWPFDocument hwpf = new HWPFDocument(pfs); content = hwpf.getText().toString(); } catch (Exception e) { e.printStackTrace(); } return content; } /** * 读取word内容 * * @param path */ public static String readDocx(String path) { String content = ""; try { InputStream is = new FileInputStream(path); XWPFDocument doc = new XWPFDocument(is); XWPFWordExtractor extractor = new XWPFWordExtractor(doc); content = extractor.getText(); } catch (Exception e) { e.printStackTrace(); } return content; }

其中获取.txt的内容不需要导包，

如果读取.txt在Android 11 读取不到值，就用下面这个方法

public static String readTxt(String path){ String str = ""; try { File urlFile = new File(path); InputStreamReader isr = new InputStreamReader(new FileInputStream(urlFile), "UTF-8"); BufferedReader br = new BufferedReader(isr); String mimeTypeLine = null ; while ((mimeTypeLine = br.readLine()) != null) { str = str+mimeTypeLine; } } catch (Exception e) { e.printStackTrace(); } return str; }

libs下载地址获取doc和docx文件的内容用到的libs_Android手机上传DOC文件-Java文档类资源-CSDN下载

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android 读取手机本地文件中.txt，.doc，.docx 文件的内容

android 读取手机本地文件中.txt，.doc，.docx 文件的内容

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