Android File存储：文件的存储路径

Posted 2020-12-15 Gatsby

 

package com.gatsby.filepath;

import android.os.Bundle;
import android.os.Environment;
import android.util.Log;

import androidx.appcompat.app.AppCompatActivity;

import java.io.BufferedReader;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.util.ArrayList;
import java.util.List;

public class MainActivity extends AppCompatActivity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        //内置Sdcard   /mnt/internal_sd
        String internalPath = Environment.getExternalStorageDirectory().toString();
        Log.d("gatsby", "path0->" + internalPath);

        //U盘挂载路径 /mnt/usb_storage/USB_DISK2/udisk0
        String usbPath = searchPath();
        Log.d("gatsby", "path2->" + usbPath);

    }
    
    public String searchPath() {
        String filePath = "/proc/mounts";
        File file = new File(filePath);
        List<String> lineList = new ArrayList<>();
        InputStream inputStream = null;
        try {
            inputStream = new FileInputStream(file);
            if (inputStream != null) {
                InputStreamReader inputStreamReader = new InputStreamReader(inputStream, "GBK");
                BufferedReader bufferedReader = new BufferedReader(inputStreamReader);
                String line = "";
                while ((line = bufferedReader.readLine()) != null) {
                    if (line.contains("vfat")) {
                        lineList.add(line);
                    }
                }
            }
        } catch (FileNotFoundException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        } finally {
            if (inputStream != null) {
                try {
                    inputStream.close();
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
        }
        String editPath = lineList.get(lineList.size() - 1);
        int start = editPath.indexOf("/mnt");
        int end = editPath.indexOf(" vfat");
        String path = editPath.substring(start, end);

        return path;
    }

}