本文将介绍android真机环境下如何获取内置和外置SD卡路径。
测试环境：三星Note3，其他手机待测试。。。
所需权限（AndroidManifest.xml文件里）
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
获取路径代码（MainActivity.java文件）
package com.example.androidtest;import java.io.BufferedReader;import java.io.File;import java.io.InputStream;import java.io.InputStreamReader;import java.util.ArrayList;import java.util.List;import android.os.Bundle;import android.os.Environment;import android.app.Activity;import android.view.Menu;public class MainActivity extends Activity { @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); StringBuilder log = new StringBuilder(); String inPath = getInnerSDCardPath(); log.append("内置SD卡路径：" + inPath + "\r\n"); List<String> extPaths = getExtSDCardPath(); for (String path : extPaths) { log.append("外置SD卡路径：" + path + "\r\n"); } System.out.println(log.toString()); } /** * 获取内置SD卡路径 * @return */ public String getInnerSDCardPath() { return Environment.getExternalStorageDirectory().getPath(); } /** * 获取外置SD卡路径 * @return 应该就一条记录或空 */ public List<String> getExtSDCardPath() { List<String> lResult = new ArrayList<String>(); try { Runtime rt = Runtime.getRuntime(); Process proc = rt.exec("mount"); InputStream is = proc.getInputStream(); InputStreamReader isr = new InputStreamReader(is); BufferedReader br = new BufferedReader(isr); String line; while ((line = br.readLine()) != null) { if (line.contains("extSdCard")) { String [] arr = line.split(" "); String path = arr[1]; File file = new File(path); if (file.isDirectory()) { lResult.add(path); } } } isr.close(); } catch (Exception e) { } return lResult; } @Override public boolean onCreateOptionsMenu(Menu menu) { // Inflate the menu; this adds items to the action bar if it is present. getMenuInflater().inflate(R.menu.activity_main, menu); return true; }}其中，line.contains("extSdCard")判断部分有待进一步验证！
打印结果：
1. 插入一张外置SD卡后
内置SD卡路径：/storage/emulated/0外置SD卡路径：/storage/extSdCard
2. 取出外置SD卡后
内置SD卡路径：/storage/emulated/0