Android獲取內置和外置SD卡路徑

本文將介紹android真機環境下如何獲取內置和外置SD卡路徑。

測試環境：三星Note3，其他手機待測試。。。

所需權限（AndroidManifest.xml文件里）

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

    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("內置SD卡路徑：" + inPath + "\r\n");  

        List<String> extPaths = getExtSDCardPath();  
        for (String path : extPaths) {  
            log.append("外置SD卡路徑：" + path + "\r\n");  
        }  
        System.out.println(log.toString());  
    }  

    /** 
     * 獲取內置SD卡路徑 
     * @return 
     */  
    public String getInnerSDCardPath() {    
        return Environment.getExternalStorageDirectory().getPath();    
    }  

    /** 
     * 獲取外置SD卡路徑 
     * @return  應該就一條記錄或空 
     */  
    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;  
    }  

}  </pre> 


 其中，line.contains("extSdCard")判斷部分有待進一步驗證！
 
 

 打印結果： 

 1. 插入一張外置SD卡后 

    內置SD卡路徑：/storage/emulated/0  
    外置SD卡路徑：/storage/extSdCard  
 

 2. 取出外置SD卡后

內置SD卡路徑：/storage/emulated/0  
 

 來自：http://blog.csdn.net/chadeltu/article/details/43736093