android获取内置和外置SD卡路径 - z

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）

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<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />

获取路径代码（MainActivity.java文件）

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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

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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

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内置SD卡路径：/storage/emulated/0