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;
@Override
protected 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