android获取内置和外置SD卡路径

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