Android 我能'；t在我的假SD卡中列出文件

我正在尝试将一些数据插入并检索到ExternalStorage内部的特定路径中。然后，我尝试检索所有SD卡路径，以了解我的路径是否已创建。但是我在列表中看不到我的路径。我已经意识到我的路径是在一个不同的位置创建的（它必须在我创建的mysd.img中），为了能够看到我的路径，这个代码应该是什么样子的

这在我的路径字符串下面：

private String filepath = "MyFileStorage";

我正在为此使用此代码：

此代码用于列表

public class MainActivity extends ListActivity {



List<String>fileList=new ArrayList<String>();

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        File root=
                new File(Environment.getExternalStorageDirectory().getAbsolutePath());
        listDir(root);
      ArrayAdapter<String>adapter=
              new ArrayAdapter<String>(this, android.R.layout.simple_list_item_1,fileList);
   this.setListAdapter(adapter);

    }

    private void listDir(File f) {

        File[]files=f.listFiles();
        for (File file : files) {
            fileList.add(file.getPath());

        }
    }



}

---

这是安卓模拟器使用的“假SD卡”图像吗？您确定它已连接到仿真器吗？您可能想使用ADB shell或安装一个文件管理器应用程序（但请注意，在ADB中查看与在应用程序中使用时，外部存储的路径略有不同）Hi Chris，我正在使用emulator。SD卡已连接。我确信。我可以从SD卡读取和写入数据。问题是，无论何时尝试提供上述特定路径。我无法列出数据。正如您所说，外部存储的路径略有不同，我需要更改此行。文件根=新文件（Environment.getExternalStorageDirectory（）.getAbsolutePath（））。。。但是我不知道它看起来应该是什么样子你试过在上面运行F3探测器了吗？这是一个寻找假SD卡的程序

public class MainActivity extends Activity implements OnClickListener{

 private String filename = "MySampleFile.txt";
 private String filepath = "MyFileStorage";
 File myInternalFile;
 File myExternalFile;
 @Override
 public void onCreate(Bundle savedInstanceState) {
  super.onCreate(savedInstanceState);
  setContentView(R.layout.activity_main);

  ContextWrapper contextWrapper = new ContextWrapper(getApplicationContext());
  File directory = contextWrapper.getDir(filepath, Context.MODE_PRIVATE);
  myInternalFile = new File(directory , filename);

  Button saveToInternalStorage =
   (Button) findViewById(R.id.saveInternalStorage);
  saveToInternalStorage.setOnClickListener(this);

  Button readFromInternalStorage =
   (Button) findViewById(R.id.getInternalStorage);
  readFromInternalStorage.setOnClickListener(this);

  Button saveToExternalStorage =
   (Button) findViewById(R.id.saveExternalStorage);
  saveToExternalStorage.setOnClickListener(this);
 -
  Button readFromExternalStorage =
   (Button) findViewById(R.id.getExternalStorage);
  readFromExternalStorage.setOnClickListener(this);

  //check if external storage is available and not read only 
  if (!isExternalStorageAvailable() || isExternalStorageReadOnly()) { 
   saveToExternalStorage.setEnabled(false);
  }
  else {
   myExternalFile = new File(getExternalFilesDir(filepath), filename);
  }

 }

 public void onClick(View v) {

  EditText myInputText = (EditText) findViewById(R.id.myInputText);
  TextView responseText = (TextView) findViewById(R.id.responseText);
  String myData = "";

  switch (v.getId()) {
  case R.id.saveInternalStorage:
   try {
    FileOutputStream fos = new FileOutputStream(myInternalFile);
    fos.write(myInputText.getText().toString().getBytes());
    fos.close();
   } catch (IOException e) {
    e.printStackTrace();
   }
   myInputText.setText("");
   responseText
   .setText("MySampleFile.txt saved to Internal Storage...");
   break;

  case R.id.getInternalStorage:
   try {
    FileInputStream fis = new FileInputStream(myInternalFile);
   // DataInputStream in = new DataInputStream(fis);
    BufferedReader br =
     new BufferedReader(new InputStreamReader(fis));
    String strLine;
    while ((strLine = br.readLine()) != null) {
     myData = myData + strLine;
    }
    br.close();
   } catch (IOException e) {
    e.printStackTrace();
   }
   myInputText.setText(myData);
   responseText
   .setText("MySampleFile.txt data retrieved from Internal Storage...");
   break;

  case R.id.saveExternalStorage:
   try {
    FileOutputStream fos = new FileOutputStream(myExternalFile);
    fos.write(myInputText.getText().toString().getBytes());
    fos.close();
   } catch (IOException e) {
    e.printStackTrace();
   }
   myInputText.setText("");
   responseText
   .setText("MySampleFile.txt saved to External Storage...");
   break;

  case R.id.getExternalStorage:
   try {
    FileInputStream fis = new FileInputStream(myExternalFile);
    DataInputStream in = new DataInputStream(fis);
    BufferedReader br =
     new BufferedReader(new InputStreamReader(in));
    String strLine;
    while ((strLine = br.readLine()) != null) {
     myData = myData + strLine;
    }
    in.close();
   } catch (IOException e) {
    e.printStackTrace();
   }
   myInputText.setText(myData);
   responseText
   .setText("MySampleFile.txt data retrieved from Internal Storage...");
   break;


  }
 }