android獲取內置和外置SD卡路徑 - z

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" />

獲取路徑代碼（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("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;
    }

}

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