Android获取sdk路径（通过挂载点）
来源：互联网 发布：如何管控淘宝乱价 编辑：程序博客网 时间：2024/06/06 17:13
废话不多说，直接上代码
package com.example.aaa;import java.io.BufferedInputStream;import java.io.BufferedReader;import java.io.File;import java.io.IOException;import java.io.InputStream;import java.io.InputStreamReader;import java.text.SimpleDateFormat;import java.util.ArrayList;import java.util.Date;import android.annotation.SuppressLint;import android.app.Activity;import android.os.Bundle;import android.os.Environment;import android.util.Log;import android.widget.TextView;public class MainActivity extends Activity {String phonePicsPath;@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.activity_main);TextView txt = (TextView) findViewById(R.id.txt);if (android.os.Build.VERSION.SDK_INT >= android.os.Build.VERSION_CODES.ICE_CREAM_SANDWICH) {String[] covertedArray = (String[]) SdCardUtil.getSDCardInfoAbove14(this).toArray(new String[SdCardUtil.getSDCardInfoAbove14(this).size()]);txt.setText(SdCardUtil.getSDCardInfoAbove14(this).toString());} else {txt.setText(SdCardUtil.getSDCardInfoBelow14().toString());}// // Intent intent = new Intent(Intent.ACTION_MAIN);// // intent.addCategory(Intent.CATEGORY_LAUNCHER);// // ComponentName cn = new ComponentName("com.tencent.mobileqq",// // "com.tencent.mobileqq.activity.SplashActivity");// // intent.setComponent(cn);// // startActivity(intent);//// String url = "mqqwpa://im/chat?chat_type=wpa&uin=";// startActivity(new Intent(Intent.ACTION_VIEW, Uri.parse(url)));// finish();// String aa = Environment.getExternalStorageDirectory().getPath();// String bb = Environment.getDataDirectory().getPath();// Toast.makeText(this, aa, Toast.LENGTH_SHORT).show();// getPath2();// System.out.println("====================" + getNormalSDCardPath());// 首先判断是否有外部存储卡，如没有判断是否有内部存储卡，如没有，继续读取应用程序所在存储// if(getExternalSdCardPath() != null){// phonePicsPath = getExternalSdCardPath();// }else{// phonePicsPath = getFilesDir().getAbsolutePath();// }// Toast.makeText(this, phonePicsPath, Toast.LENGTH_SHORT).show();}/** * 遍历 "system/etc/vold.fstab” 文件，获取全部的Android的挂载点信息 * * @return */private static ArrayList<String> getDevMountList() {String[] toSearch = FileUtil.readFile("/system/etc/vold.fstab").split(" ");ArrayList<String> out = new ArrayList<String>();for (int i = 0; i < toSearch.length; i++) {if (toSearch[i].contains("dev_mount")) {if (new File(toSearch[i + 2]).exists()) {out.add(toSearch[i + 2]);}}}return out;}/** * 获取扩展SD卡存储目录 * * 如果有外接的SD卡，并且已挂载，则返回这个外置SD卡目录 否则：返回内置SD卡目录 * * @return */public static String getExternalSdCardPath() {// if (SDCardUtils.isMounted()) {// File sdCardFile = new// File(Environment.getExternalStorageDirectory().getAbsolutePath());// return sdCardFile.getAbsolutePath();// }String path = null;File sdCardFile = null;ArrayList<String> devMountList = getDevMountList();for (String devMount : devMountList) {File file = new File(devMount);if (file.isDirectory() && file.canWrite()) {path = file.getAbsolutePath();String timeStamp = new SimpleDateFormat("ddMMyyyy_HHmmss").format(new Date());File testWritable = new File(path, "test_" + timeStamp);if (testWritable.mkdirs()) {testWritable.delete();} else {path = null;}}}if (path != null) {sdCardFile = new File(path);return sdCardFile.getAbsolutePath();}return null;}/** * 获取sd卡路径 双sd卡时，根据”设置“里面的数据存储位置选择，获得的是内置sd卡或外置sd卡 * * @return */public static String getNormalSDCardPath() {return Environment.getExternalStorageDirectory().getPath();}/** * 获取sd卡路径 双sd卡时，获得的是外置sd卡 * * @return */public static String getSDCardPath() {String cmd = "cat /proc/mounts";Runtime run = Runtime.getRuntime();// 返回与当前 Java 应用程序相关的运行时对象BufferedInputStream in = null;BufferedReader inBr = null;try {Process p = run.exec(cmd);// 启动另一个进程来执行命令in = new BufferedInputStream(p.getInputStream());inBr = new BufferedReader(new InputStreamReader(in));String lineStr;while ((lineStr = inBr.readLine()) != null) {// 获得命令执行后在控制台的输出信息Log.i("CommonUtil:getSDCardPath", lineStr);if (lineStr.contains("sdcard")&& lineStr.contains(".android_secure")) {String[] strArray = lineStr.split(" ");if (strArray != null && strArray.length >= 5) {String result = strArray[1].replace("/.android_secure","");return result;}}// 检查命令是否执行失败。if (p.waitFor() != 0 && p.exitValue() == 1) {// p.exitValue()==0表示正常结束，1：非正常结束Log.e("CommonUtil:getSDCardPath", "命令执行失败!");}}} catch (Exception e) {Log.e("CommonUtil:getSDCardPath", e.toString());// return Environment.getExternalStorageDirectory().getPath();} finally {try {if (in != null) {in.close();}} catch (IOException e) {e.printStackTrace();}try {if (inBr != null) {inBr.close();}} catch (IOException e) {e.printStackTrace();}}return Environment.getExternalStorageDirectory().getPath();}@SuppressLint("SdCardPath")public String getPath2() {String sdcard_path = null;String sd_default = Environment.getExternalStorageDirectory().getAbsolutePath();Log.d("text", sd_default);if (sd_default.endsWith("/")) {sd_default = sd_default.substring(0, sd_default.length() - 1);}// 得到路径try {Runtime runtime = Runtime.getRuntime();Process proc = runtime.exec("mount");InputStream is = proc.getInputStream();InputStreamReader isr = new InputStreamReader(is);String line;BufferedReader br = new BufferedReader(isr);while ((line = br.readLine()) != null) {if (line.contains("secure"))continue;if (line.contains("asec"))continue;if (line.contains("fat") && line.contains("/mnt/")) {String columns[] = line.split(" ");if (columns != null && columns.length > 1) {if (sd_default.trim().equals(columns[1].trim())) {continue;}sdcard_path = columns[1];}} else if (line.contains("fuse") && line.contains("/mnt/")) {String columns[] = line.split(" ");if (columns != null && columns.length > 1) {if (sd_default.trim().equals(columns[1].trim())) {continue;}sdcard_path = columns[1];}}}} catch (Exception e) {e.printStackTrace();}return sdcard_path;}}文件工具类：
package com.example.aaa;/*** * 文件工具类 * * @author zhangda */import java.io.BufferedReader;import java.io.File;import java.io.FileInputStream;import java.io.FileNotFoundException;import java.io.FileOutputStream;import java.io.FileWriter;import java.io.IOException;import java.io.InputStream;import java.io.InputStreamReader;import java.io.OutputStream;import java.util.ArrayList;import java.util.List;import android.text.TextUtils;/** * File Utils * <ul> * Read or write file * <li>{@link #readFile(String)} read file</li> * <li>{@link #readFileToList(String)} read file to string list</li> * <li>{@link #writeFile(String, String, boolean)} write file from String</li> * <li>{@link #writeFile(String, String)} write file from String</li> * <li>{@link #writeFile(String, List, boolean)} write file from String List</li> * <li>{@link #writeFile(String, List)} write file from String List</li> * <li>{@link #writeFile(String, InputStream)} write file</li> * <li>{@link #writeFile(String, InputStream, boolean)} write file</li> * <li>{@link #writeFile(File, InputStream)} write file</li> * <li>{@link #writeFile(File, InputStream, boolean)} write file</li> * </ul> * <ul> * Operate file * <li>{@link #moveFile(File, File)} or {@link #moveFile(String, String)}</li> * <li>{@link #copyFile(String, String)}</li> * <li>{@link #getFileExtension(String)}</li> * <li>{@link #getFileName(String)}</li> * <li>{@link #getFileNameWithoutExtension(String)}</li> * <li>{@link #getFileSize(String)}</li> * <li>{@link #deleteFile(String)}</li> * <li>{@link #isFileExist(String)}</li> * <li>{@link #isFolderExist(String)}</li> * <li>{@link #makeFolders(String)}</li> * <li>{@link #makeDirs(String)}</li> * </ul> * * @author <a href="http://www.trinea.cn" target="_blank">Trinea</a> 2012-5-12 */public class FileUtil { public final static String FILE_EXTENSION_SEPARATOR = "."; private FileUtil() { throw new AssertionError(); } /** * read file * * @param filePath * @param charsetName The name of a supported * {@link java.nio.charset.Charset </code>charset<code>} * @return if file not exist, return null, else return content of file * @throws RuntimeException if an error occurs while operator BufferedReader */ public static String readFile(String filePath) { String fileContent = ""; File file = new File(filePath); if (file == null || !file.isFile()) { return null; } BufferedReader reader = null; try { InputStreamReader is = new InputStreamReader(new FileInputStream( file)); reader = new BufferedReader(is); String line = null; int i = 0; while ((line = reader.readLine()) != null) { fileContent += line + " "; } reader.close(); return fileContent; } catch (IOException e) { e.printStackTrace(); } finally { if (reader != null) { try { reader.close(); } catch (IOException e) { e.printStackTrace(); } } } return fileContent; } /** * write file * * @param filePath * @param content * @param append is append, if true, write to the end of file, else clear * content of file and write into it * @return return false if content is empty, true otherwise * @throws RuntimeException if an error occurs while operator FileWriter */ public static boolean writeFile(String filePath, String content, boolean append) { if (StringUtils.isEmpty(content)) { return false; } FileWriter fileWriter = null; try { makeDirs(filePath); fileWriter = new FileWriter(filePath, append); fileWriter.write(content); fileWriter.close(); return true; } catch (IOException e) { throw new RuntimeException("IOException occurred. ", e); } finally { if (fileWriter != null) { try { fileWriter.close(); } catch (IOException e) { throw new RuntimeException("IOException occurred. ", e); } } } } /** * write file * * @param filePath * @param contentList * @param append is append, if true, write to the end of file, else clear * content of file and write into it * @return return false if contentList is empty, true otherwise * @throws RuntimeException if an error occurs while operator FileWriter */ public static boolean writeFile(String filePath, List<String> contentList, boolean append) { if (contentList == null || contentList.size() == 0) { return false; } FileWriter fileWriter = null; try { makeDirs(filePath); fileWriter = new FileWriter(filePath, append); int i = 0; for (String line : contentList) { if (i++ > 0) { fileWriter.write("\r\n"); } fileWriter.write(line); } fileWriter.close(); return true; } catch (IOException e) { throw new RuntimeException("IOException occurred. ", e); } finally { if (fileWriter != null) { try { fileWriter.close(); } catch (IOException e) { throw new RuntimeException("IOException occurred. ", e); } } } } /** * write file, the string will be written to the begin of the file * * @param filePath * @param content * @return */ public static boolean writeFile(String filePath, String content) { return writeFile(filePath, content, false); } /** * write file, the string list will be written to the begin of the file * * @param filePath * @param contentList * @return */ public static boolean writeFile(String filePath, List<String> contentList) { return writeFile(filePath, contentList, false); } /** * write file, the bytes will be written to the begin of the file * * @param filePath * @param stream * @return * @see {@link #writeFile(String, InputStream, boolean)} */ public static boolean writeFile(String filePath, InputStream stream) { return writeFile(filePath, stream, false); } /** * write file * * @param file the file to be opened for writing. * @param stream the input stream * @param append if <code>true</code>, then bytes will be written to the end * of the file rather than the beginning * @return return true * @throws RuntimeException if an error occurs while operator * FileOutputStream */ public static boolean writeFile(String filePath, InputStream stream, boolean append) { return writeFile(filePath != null ? new File(filePath) : null, stream, append); } /** * write file, the bytes will be written to the begin of the file * * @param file * @param stream * @return * @see {@link #writeFile(File, InputStream, boolean)} */ public static boolean writeFile(File file, InputStream stream) { return writeFile(file, stream, false); } /** * write file * * @param file the file to be opened for writing. * @param stream the input stream * @param append if <code>true</code>, then bytes will be written to the end * of the file rather than the beginning * @return return true * @throws RuntimeException if an error occurs while operator * FileOutputStream */ public static boolean writeFile(File file, InputStream stream, boolean append) { OutputStream o = null; try { makeDirs(file.getAbsolutePath()); o = new FileOutputStream(file, append); byte data[] = new byte[1024]; int length = -1; while ((length = stream.read(data)) != -1) { o.write(data, 0, length); } o.flush(); return true; } catch (FileNotFoundException e) { throw new RuntimeException("FileNotFoundException occurred. ", e); } catch (IOException e) { throw new RuntimeException("IOException occurred. ", e); } finally { if (o != null) { try { o.close(); stream.close(); } catch (IOException e) { throw new RuntimeException("IOException occurred. ", e); } } } } /** * move file * * @param sourceFilePath * @param destFilePath */ public static void moveFile(String sourceFilePath, String destFilePath) { if (TextUtils.isEmpty(sourceFilePath) || TextUtils.isEmpty(destFilePath)) { throw new RuntimeException( "Both sourceFilePath and destFilePath cannot be null."); } moveFile(new File(sourceFilePath), new File(destFilePath)); } /** * move file * * @param srcFile * @param destFile */ public static void moveFile(File srcFile, File destFile) { boolean rename = srcFile.renameTo(destFile); if (!rename) { copyFile(srcFile.getAbsolutePath(), destFile.getAbsolutePath()); deleteFile(srcFile.getAbsolutePath()); } } /** * copy file * * @param sourceFilePath * @param destFilePath * @return * @throws RuntimeException if an error occurs while operator * FileOutputStream */ public static boolean copyFile(String sourceFilePath, String destFilePath) { InputStream inputStream = null; try { inputStream = new FileInputStream(sourceFilePath); } catch (FileNotFoundException e) { throw new RuntimeException("FileNotFoundException occurred. ", e); } return writeFile(destFilePath, inputStream); } /** * read file to string list, a element of list is a line * * @param filePath * @param charsetName The name of a supported * {@link java.nio.charset.Charset </code>charset<code>} * @return if file not exist, return null, else return content of file * @throws RuntimeException if an error occurs while operator BufferedReader */ public static List<String> readFileToList(String filePath, String charsetName) { File file = new File(filePath); List<String> fileContent = new ArrayList<String>(); if (file == null || !file.isFile()) { return null; } BufferedReader reader = null; try { InputStreamReader is = new InputStreamReader(new FileInputStream( file), charsetName); reader = new BufferedReader(is); String line = null; while ((line = reader.readLine()) != null) { fileContent.add(line); } reader.close(); return fileContent; } catch (IOException e) { throw new RuntimeException("IOException occurred. ", e); } finally { if (reader != null) { try { reader.close(); } catch (IOException e) { throw new RuntimeException("IOException occurred. ", e); } } } } /** * get file name from path, not include suffix * * <pre> * getFileNameWithoutExtension(null) = null * getFileNameWithoutExtension("") = "" * getFileNameWithoutExtension(" ") = " " * getFileNameWithoutExtension("abc") = "abc" * getFileNameWithoutExtension("a.mp3") = "a" * getFileNameWithoutExtension("a.b.rmvb") = "a.b" * getFileNameWithoutExtension("c:\\") = "" * getFileNameWithoutExtension("c:\\a") = "a" * getFileNameWithoutExtension("c:\\a.b") = "a" * getFileNameWithoutExtension("c:a.txt\\a") = "a" * getFileNameWithoutExtension("/home/admin") = "admin" * getFileNameWithoutExtension("/home/admin/a.txt/b.mp3") = "b" * </pre> * * @param filePath * @return file name from path, not include suffix * @see */ public static String getFileNameWithoutExtension(String filePath) { if (StringUtils.isEmpty(filePath)) { return filePath; } int extenPosi = filePath.lastIndexOf(FILE_EXTENSION_SEPARATOR); int filePosi = filePath.lastIndexOf(File.separator); if (filePosi == -1) { return (extenPosi == -1 ? filePath : filePath.substring(0, extenPosi)); } if (extenPosi == -1) { return filePath.substring(filePosi + 1); } return (filePosi < extenPosi ? filePath.substring(filePosi + 1, extenPosi) : filePath.substring(filePosi + 1)); } /** * get file name from path, include suffix * * <pre> * getFileName(null) = null * getFileName("") = "" * getFileName(" ") = " " * getFileName("a.mp3") = "a.mp3" * getFileName("a.b.rmvb") = "a.b.rmvb" * getFileName("abc") = "abc" * getFileName("c:\\") = "" * getFileName("c:\\a") = "a" * getFileName("c:\\a.b") = "a.b" * getFileName("c:a.txt\\a") = "a" * getFileName("/home/admin") = "admin" * getFileName("/home/admin/a.txt/b.mp3") = "b.mp3" * </pre> * * @param filePath * @return file name from path, include suffix */ public static String getFileName(String filePath) { if (StringUtils.isEmpty(filePath)) { return filePath; } int filePosi = filePath.lastIndexOf(File.separator); return (filePosi == -1) ? filePath : filePath.substring(filePosi + 1); } /** * get folder name from path * * <pre> * getFolderName(null) = null * getFolderName("") = "" * getFolderName(" ") = "" * getFolderName("a.mp3") = "" * getFolderName("a.b.rmvb") = "" * getFolderName("abc") = "" * getFolderName("c:\\") = "c:" * getFolderName("c:\\a") = "c:" * getFolderName("c:\\a.b") = "c:" * getFolderName("c:a.txt\\a") = "c:a.txt" * getFolderName("c:a\\b\\c\\d.txt") = "c:a\\b\\c" * getFolderName("/home/admin") = "/home" * getFolderName("/home/admin/a.txt/b.mp3") = "/home/admin/a.txt" * </pre> * * @param filePath * @return */ public static String getFolderName(String filePath) { if (StringUtils.isEmpty(filePath)) { return filePath; } int filePosi = filePath.lastIndexOf(File.separator); return (filePosi == -1) ? "" : filePath.substring(0, filePosi); } /** * get suffix of file from path * * <pre> * getFileExtension(null) = "" * getFileExtension("") = "" * getFileExtension(" ") = " " * getFileExtension("a.mp3") = "mp3" * getFileExtension("a.b.rmvb") = "rmvb" * getFileExtension("abc") = "" * getFileExtension("c:\\") = "" * getFileExtension("c:\\a") = "" * getFileExtension("c:\\a.b") = "b" * getFileExtension("c:a.txt\\a") = "" * getFileExtension("/home/admin") = "" * getFileExtension("/home/admin/a.txt/b") = "" * getFileExtension("/home/admin/a.txt/b.mp3") = "mp3" * </pre> * * @param filePath * @return */ public static String getFileExtension(String filePath) { if (StringUtils.isBlank(filePath)) { return filePath; } int extenPosi = filePath.lastIndexOf(FILE_EXTENSION_SEPARATOR); int filePosi = filePath.lastIndexOf(File.separator); if (extenPosi == -1) { return ""; } return (filePosi >= extenPosi) ? "" : filePath.substring(extenPosi + 1); } /** * Creates the directory named by the trailing filename of this file, * including the complete directory path required * to create this directory. <br/> * <br/> * <ul> * <strong>Attentions:</strong> * <li>makeDirs("C:\\Users\\Trinea") can only create users folder</li> * <li>makeFolder("C:\\Users\\Trinea\\") can create Trinea folder</li> * </ul> * * @param filePath * @return true if the necessary directories have been created or the target * directory already exists, false one of * the directories can not be created. * <ul> * <li>if {@link FileUtil#getFolderName(String)} return null, return * false</li> * <li>if target directory already exists, return true</li> * <li>return {@link java.io.File#makeFolder}</li> * </ul> */ public static boolean makeDirs(String filePath) { String folderName = getFolderName(filePath); if (StringUtils.isEmpty(folderName)) { return false; } File folder = new File(folderName); return (folder.exists() && folder.isDirectory()) ? true : folder .mkdirs(); } /** * @param filePath * @return * @see #makeDirs(String) */ public static boolean makeFolders(String filePath) { return makeDirs(filePath); } /** * Indicates if this file represents a file on the underlying file system. * * @param filePath * @return */ public static boolean isFileExist(String filePath) { if (StringUtils.isBlank(filePath)) { return false; } File file = new File(filePath); return (file.exists() && file.isFile()); } /** * Indicates if this file represents a directory on the underlying file * system. * * @param directoryPath * @return */ public static boolean isFolderExist(String directoryPath) { if (StringUtils.isBlank(directoryPath)) { return false; } File dire = new File(directoryPath); return (dire.exists() && dire.isDirectory()); } /** * delete file or directory * <ul> * <li>if path is null or empty, return true</li> * <li>if path not exist, return true</li> * <li>if path exist, delete recursion. return true</li> * <ul> * * @param path * @return */ public static boolean deleteFile(String path) { if (StringUtils.isBlank(path)) { return true; } File file = new File(path); if (!file.exists()) { return true; } if (file.isFile()) { return file.delete(); } if (!file.isDirectory()) { return false; } for (File f : file.listFiles()) { if (f.isFile()) { f.delete(); } else if (f.isDirectory()) { deleteFile(f.getAbsolutePath()); } } return file.delete(); } /** * get file size * <ul> * <li>if path is null or empty, return -1</li> * <li>if path exist and it is a file, return file size, else return -1</li> * <ul> * * @param path * @return returns the length of this file in bytes. returns -1 if the file * does not exist. */ public static long getFileSize(String path) { if (StringUtils.isBlank(path)) { return -1; } File file = new File(path); return (file.exists() && file.isFile() ? file.length() : -1); }}package com.example.aaa;public class SDCardInfo { /** * 名称 */ private String label; /** * 挂载点 */ private String mountPoint; /** * 是否已挂载 */ private boolean mounted; /** * @Description:获取SD卡名称 * @return SD卡名称 */ public String getLabel() { return label; } /** * @Description:设置SD卡名称 * @param label SD卡名称 */ public void setLabel(String label) { this.label = label; } /** * @Description:获取挂载路径 * @return 挂载路径 */ public String getMountPoint() { return mountPoint; } /** * @Description:设置挂载路径 * @param mountPoint 挂载路径 */ public void setMountPoint(String mountPoint) { this.mountPoint = mountPoint; } /** * @Description:是否已经挂载 * @return true:已经挂载，false:未挂载 */ public boolean isMounted() { return mounted; } /** * @Description:设置是否已经挂载 * @param mounted * true:已经挂载，false:未挂载 */ public void setMounted(boolean mounted) { this.mounted = mounted; } @Override public String toString() { return "SDCardInfo [label=" + label + ", mountPoint=" + mountPoint + ", mounted=" + mounted + "]"; }}package com.example.aaa;import java.io.BufferedReader;import java.io.File;import java.io.FileReader;import java.io.IOException;import java.lang.reflect.Method;import java.util.ArrayList;import java.util.HashMap;import java.util.List;import android.annotation.SuppressLint;import android.content.Context;import android.os.Environment;import android.os.storage.StorageManager;@SuppressLint("InlinedApi")public class SdCardUtil { /** * 内置 */ static String SDCARD_INTERNAL = "internal"; /** * 外置 */ static String SDCARD_EXTERNAL = "external"; /** * API14以下通过读取Linux的vold.fstab文件来获取SDCard信息 * * @return */ public static HashMap<String, SDCardInfo> getSDCardInfoBelow14() { HashMap<String, SDCardInfo> sdCardInfos = new HashMap<String, SDCardInfo>(); BufferedReader bufferedReader = null; List<String> dev_mountStrs = null; try { // API14以下通过读取Linux的vold.fstab文件来获取SDCard信息 bufferedReader = new BufferedReader(new FileReader(Environment.getRootDirectory().getAbsoluteFile() + File.separator + "etc" + File.separator + "vold.fstab")); dev_mountStrs = new ArrayList<String>(); String line = null; while ((line = bufferedReader.readLine()) != null) { if (line.startsWith("dev_mount")) { dev_mountStrs.add(line); } } bufferedReader.close(); } catch (IOException e) { e.printStackTrace(); } for (int i = 0; dev_mountStrs != null && i < dev_mountStrs.size(); i++) { SDCardInfo sdCardInfo = new SDCardInfo(); String[] infoStr = dev_mountStrs.get(i).split(" "); sdCardInfo.setLabel(infoStr[1]); sdCardInfo.setMountPoint(infoStr[2]); if (sdCardInfo.getMountPoint().equals( Environment.getExternalStorageDirectory().getAbsolutePath())) { sdCardInfo.setMounted(Environment.getExternalStorageState().equals(Environment.MEDIA_MOUNTED)); sdCardInfos.put(SDCARD_INTERNAL, sdCardInfo); } else if (sdCardInfo.getMountPoint().startsWith("/mnt") && !sdCardInfo.getMountPoint().equals(Environment.getExternalStorageDirectory().getAbsolutePath())) { File file = new File(sdCardInfo.getMountPoint() + File.separator + "temp"); if (file.exists()) { sdCardInfo.setMounted(true); } else { if (file.mkdir()) { file.delete(); sdCardInfo.setMounted(true); } else { sdCardInfo.setMounted(false); } } sdCardInfos.put(SDCARD_EXTERNAL, sdCardInfo); } } return sdCardInfos; } // API14以上包括14通过改方法获取 public static ArrayList<String> getSDCardInfoAbove14(Context context) { ArrayList<String> allPath = new ArrayList<String>(); String[] storagePathList = null; try { StorageManager storageManager = (StorageManager) context.getSystemService(Context.STORAGE_SERVICE); Method getVolumePaths = storageManager.getClass().getMethod("getVolumePaths"); storagePathList = (String[]) getVolumePaths.invoke(storageManager); } catch (Exception e) { e.printStackTrace(); } if (storagePathList != null && storagePathList.length > 0) { String mSDCardPath = storagePathList[0]; allPath.add(mSDCardPath); if (storagePathList.length >= 2) { String externalDevPath = storagePathList[1]; allPath.add(externalDevPath); } } return allPath; } /** * @Description:判断SDCard是否挂载上,返回值为true证明挂载上了，否则未挂载 * @param context 上下文 * @param mountPoint 挂载点 */ protected static boolean checkSDCardMount14(Context context, String mountPoint) { if (mountPoint == null) { return false; } StorageManager storageManager = (StorageManager) context.getSystemService(Context.STORAGE_SERVICE); try { Method getVolumeState = storageManager.getClass().getMethod("getVolumeState", String.class); String state = (String) getVolumeState.invoke(storageManager, mountPoint); return Environment.MEDIA_MOUNTED.equals(state); } catch (Exception e) { e.printStackTrace(); } return false; }}package com.example.aaa;import java.io.UnsupportedEncodingException;import java.net.URLEncoder;import java.util.regex.Matcher;import java.util.regex.Pattern;/** * String Utils * */public class StringUtils { private StringUtils() { throw new AssertionError(); } /** * is null or its length is 0 or it is made by space * * <pre> * isBlank(null) = true; * isBlank("") = true; * isBlank(" ") = true; * isBlank("a") = false; * isBlank("a ") = false; * isBlank(" a") = false; * isBlank("a b") = false; * </pre> * * @param str * @return if string is null or its size is 0 or it is made by space, return * true, else return false. */ public static boolean isBlank(String str) { return (str == null || str.trim().length() == 0); } /** * is null or its length is 0 * * <pre> * isEmpty(null) = true; * isEmpty("") = true; * isEmpty(" ") = false; * </pre> * * @param str * @return if string is null or its size is 0, return true, else return * false. */ public static boolean isEmpty(CharSequence str) { return (str == null || str.length() == 0); } /** * compare two string * * @param actual * @param expected * @return * @see ObjectUtils#isEquals(Object, Object) */ public static boolean isEquals(String actual, String expected) { return actual == expected || (actual == null ? expected == null : actual.equals(expected)); } /** * get length of CharSequence * * <pre> * length(null) = 0; * length(\"\") = 0; * length(\"abc\") = 3; * </pre> * * @param str * @return if str is null or empty, return 0, else return * {@link CharSequence#length()}. */ public static int length(CharSequence str) { return str == null ? 0 : str.length(); } /** * null Object to empty string * * <pre> * nullStrToEmpty(null) = ""; * nullStrToEmpty("") = ""; * nullStrToEmpty("aa") = "aa"; * </pre> * * @param str * @return */ public static String nullStrToEmpty(Object str) { return (str == null ? "" : (str instanceof String ? (String) str : str .toString())); } /** * capitalize first letter * * <pre> * capitalizeFirstLetter(null) = null; * capitalizeFirstLetter("") = ""; * capitalizeFirstLetter("2ab") = "2ab" * capitalizeFirstLetter("a") = "A" * capitalizeFirstLetter("ab") = "Ab" * capitalizeFirstLetter("Abc") = "Abc" * </pre> * * @param str * @return */ public static String capitalizeFirstLetter(String str) { if (isEmpty(str)) { return str; } char c = str.charAt(0); return (!Character.isLetter(c) || Character.isUpperCase(c)) ? str : new StringBuilder(str.length()).append(Character.toUpperCase(c)) .append(str.substring(1)).toString(); } /** * encoded in utf-8 * * <pre> * utf8Encode(null) = null * utf8Encode("") = ""; * utf8Encode("aa") = "aa"; * utf8Encode("啊啊啊啊") = "%E5%95%8A%E5%95%8A%E5%95%8A%E5%95%8A"; * </pre> * * @param str * @return * @throws UnsupportedEncodingException if an error occurs */ public static String utf8Encode(String str) { if (!isEmpty(str) && str.getBytes().length != str.length()) { try { return URLEncoder.encode(str, "UTF-8"); } catch (UnsupportedEncodingException e) { throw new RuntimeException( "UnsupportedEncodingException occurred. ", e); } } return str; } /** * encoded in utf-8, if exception, return defultReturn * * @param str * @param defultReturn * @return */ public static String utf8Encode(String str, String defultReturn) { if (!isEmpty(str) && str.getBytes().length != str.length()) { try { return URLEncoder.encode(str, "UTF-8"); } catch (UnsupportedEncodingException e) { return defultReturn; } } return str; } /** * get innerHtml from href * * <pre> * getHrefInnerHtml(null) = "" * getHrefInnerHtml("") = "" * getHrefInnerHtml("mp3") = "mp3"; * getHrefInnerHtml("<a innerHtml</a>") = "<a innerHtml</a>"; * getHrefInnerHtml("<a>innerHtml</a>") = "innerHtml"; * getHrefInnerHtml("<a<a>innerHtml</a>") = "innerHtml"; * getHrefInnerHtml("<a href="baidu.com">innerHtml</a>") = "innerHtml"; * getHrefInnerHtml("<a href="baidu.com" title="baidu">innerHtml</a>") = "innerHtml"; * getHrefInnerHtml(" <a>innerHtml</a> ") = "innerHtml"; * getHrefInnerHtml("<a>innerHtml</a></a>") = "innerHtml"; * getHrefInnerHtml("jack<a>innerHtml</a></a>") = "innerHtml"; * getHrefInnerHtml("<a>innerHtml1</a><a>innerHtml2</a>") = "innerHtml2"; * </pre> * * @param href * @return <ul> * <li>if href is null, return ""</li> * <li>if not match regx, return source</li> * <li>return the last string that match regx</li> * </ul> */ public static String getHrefInnerHtml(String href) { if (isEmpty(href)) { return ""; } String hrefReg = ".*<[\\s]*a[\\s]*.*>(.+?)<[\\s]*/a[\\s]*>.*"; Pattern hrefPattern = Pattern .compile(hrefReg, Pattern.CASE_INSENSITIVE); Matcher hrefMatcher = hrefPattern.matcher(href); if (hrefMatcher.matches()) { return hrefMatcher.group(1); } return href; }/** * process special char in html * * <pre> * htmlEscapeCharsToString(null) = null; * htmlEscapeCharsToString("") = ""; * htmlEscapeCharsToString("mp3") = "mp3"; * htmlEscapeCharsToString("mp3<") = "mp3<"; * htmlEscapeCharsToString("mp3>") = "mp3\>"; * htmlEscapeCharsToString("mp3&mp4") = "mp3&mp4"; * htmlEscapeCharsToString("mp3"mp4") = "mp3\"mp4"; * htmlEscapeCharsToString("mp3<>&"mp4") = "mp3\<\>&\"mp4"; * </pre> * * @param source * @return */ public static String htmlEscapeCharsToString(String source) { return StringUtils.isEmpty(source) ? source : source .replaceAll("<", "<").replaceAll(">", ">") .replaceAll("&", "&").replaceAll(""", "\""); } /** * transform half width char to full width char * * <pre> * fullWidthToHalfWidth(null) = null; * fullWidthToHalfWidth("") = ""; * fullWidthToHalfWidth(new String(new char[] {12288})) = " "; * fullWidthToHalfWidth("！＂＃＄％＆) = "!\"#$%&"; * </pre> * * @param s * @return */ public static String fullWidthToHalfWidth(String s) { if (isEmpty(s)) { return s; } char[] source = s.toCharArray(); for (int i = 0; i < source.length; i++) { if (source[i] == 12288) { source[i] = ' '; // } else if (source[i] == 12290) { // source[i] = '.'; } else if (source[i] >= 65281 && source[i] <= 65374) { source[i] = (char) (source[i] - 65248); } else { source[i] = source[i]; } } return new String(source); } /** * transform full width char to half width char * * <pre> * halfWidthToFullWidth(null) = null; * halfWidthToFullWidth("") = ""; * halfWidthToFullWidth(" ") = new String(new char[] {12288}); * halfWidthToFullWidth("!\"#$%&) = "！＂＃＄％＆"; * </pre> * * @param s * @return */ public static String halfWidthToFullWidth(String s) { if (isEmpty(s)) { return s; } char[] source = s.toCharArray(); for (int i = 0; i < source.length; i++) { if (source[i] == ' ') { source[i] = (char) 12288; // } else if (source[i] == '.') { // source[i] = (char)12290; } else if (source[i] >= 33 && source[i] <= 126) { source[i] = (char) (source[i] + 65248); } else { source[i] = source[i]; } } return new String(source); }}<?xml version="1.0" encoding="utf-8"?><manifest xmlns:android="http://schemas.android.com/apk/res/android" package="com.example.aaa" android:versionCode="1" android:versionName="1.0" > <uses-sdk android:minSdkVersion="8" android:targetSdkVersion="18" /> <uses-permission android:name="android.permission.WRITE_SETTINGS" > </uses-permission> <uses-permission android:name="android.permission.WRITE_SECURE_SETTINGS" /> <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"></uses-permission> <application android:allowBackup="true" android:icon="@drawable/ic_launcher" android:label="@string/app_name" android:theme="@style/AppTheme" > <activity android:name="com.example.aaa.MainActivity" android:label="@string/app_name" > <intent-filter> <action android:name="android.intent.action.MAIN" /> <category android:name="android.intent.category.LAUNCHER" /> </intent-filter> </activity> </application></manifest>
以上代码可直接考到项目中，完美获取，内置外置SD卡都可以获取到
1 0
- Android获取sdk路径（通过挂载点）
- SDK通过文件句柄获取文件路径
- Android 通过Uri获取文件路径
- Android SDK提供的获取文件路径方法小结
- android通过高德地图定位sdk获取当前位置的经纬度（只是经纬度哦）
- JavaEE获取资源（通过路径/通过域名）
- android通过MP3路径获取MP3的album
- android通过MP3路径获取MP3的album .
- android通过MP3路径获取MP3的album
- Android通过Uri获取文件的路径的方法
- Android选择文件及通过Uri获取文件路径
- Android——通过Uri获取文件的路径
- Android获取指定路径的图片(通过Drawable方式)
- 通过Gradle配置指定sdk路径
- 通过快捷方式获取文件路径
- 通过路径获取媒体文件信息
- 通过路径获取媒体文件信息
- 通过pid获取程序路径
- CC和DDOS攻击nginx防备策略
- (转)PCI设备的地址空间
- linux 多线程、多进程简介
- 【js基础】javascript中关于数据类型一些知识和类型判断
- 当外部程序正在“Opened”上接收时导致访问冲突，是否终止该应用程序， LINK : fatal error LNK1123: 转换到 COFF 期间失败: 文件无效或损坏
- Android获取sdk路径（通过挂载点）
- Laravel 中composer相关操作提示php相关异常的处理方法
- LoadLibrary函数
- Wireshark
- iOS UITableView中关于cell里的按钮被点击时如何确定是哪一个section
- 领域驱动设计系列文章汇总
- 《iOS Human Interface Guidelines》——The Status Bar
- 推荐一款好用的笔记管理软件(Evernote)
- Codeforces 617E XOR and Favorite Number (区间异或和 莫队算法 分块暴力)
