如何正确获得Android内外SD卡路径

/** * 获取手机自身内存路径 * */ public static String getPhoneCardPath(){ return Environment.getDataDirectory().getPath(); } /** * 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) { // TODO Auto-generated catch block e.printStackTrace(); } try { if(inBr!=null){ inBr.close(); } } catch (IOException e) { // TODO Auto-generated catch block e.printStackTrace(); } } return Environment.getExternalStorageDirectory().getPath(); } //查看所有的sd路径 public String getSDCardPathEx(){ String mount = new String(); 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")) { String columns[] = line.split(" "); if (columns != null && columns.length > 1) { mount = mount.concat("*" + columns[1] + "\n"); } } else if (line.contains("fuse")) { String columns[] = line.split(" "); if (columns != null && columns.length > 1) { mount = mount.concat(columns[1] + "\n"); } } } } catch (FileNotFoundException e) { // TODO Auto-generated catch block e.printStackTrace(); } catch (IOException e) { // TODO Auto-generated catch block e.printStackTrace(); } return mount; } //获取当前路径，可用空间 public static long getAvailableSize(String path){ try{ File base = new File(path); StatFs stat = new StatFs(base.getPath()); long nAvailableCount = stat.getBlockSize() * ((long) stat.getAvailableBlocks()); return nAvailableCount; }catch(Exception e){ e.printStackTrace(); } return 0; }