Getting Open Failed EACCES(Permission Denied)

Question

I want to write data into a SD card but I am getting the following error: Failed open failed: EACCES (Permission denied). The Android version I am working on is jelly bean(4.3). I have also given permission in manifest file.

Here is my code:

 package com.example.androidsdcard;

    import java.io.BufferedReader;
    import java.io.File;
    import java.io.FileInputStream;
    import java.io.FileOutputStream;
    import java.io.InputStreamReader;
    import java.io.OutputStreamWriter;

    import android.app.Activity;
    import android.os.Bundle;
    import android.os.Environment;
    import android.view.View;
    import android.view.View.OnClickListener;
    import android.widget.Button;
    import android.widget.EditText;
    import android.widget.Toast;

    public class MainActivity extends Activity {
        // GUI controls
        EditText txtData;
        Button btnWriteSDFile;
        Button btnReadSDFile;
        Button btnClearScreen;
        Button btnClose;
        File sample=null;
        String SDCard_Path="/mnt/extsd";
        @Override
        public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        // bind GUI elements with local controls
        txtData = (EditText) findViewById(R.id.txtData);
        txtData.setHint("Enter some lines of data here...");

        btnWriteSDFile = (Button) findViewById(R.id.btnWriteSDFile);
        btnWriteSDFile.setOnClickListener(new OnClickListener() {

        public void onClick(View v) {
            // write on SD card file data in the text box

            File storageDir = new File(SDCard_Path);
            String sample1 = Environment.getExternalStorageDirectory().getPath();
            Toast.makeText(MainActivity.this,sample1, Toast.LENGTH_LONG).show();
            if(sample == null)
            {
                Toast.makeText(MainActivity.this,"Sample == null executed", Toast.LENGTH_LONG).show();

            }
            else

                Toast.makeText(MainActivity.this,"Sample == null skipped", Toast.LENGTH_LONG).show();

            if(storageDir.isDirectory())
            {
                String[] dirList = storageDir.list();
                if(dirList==null)
                {
                    Toast.makeText(getBaseContext(),"Failed to detect SD card",Toast.LENGTH_SHORT).show();
                    return;
                }
                else
                Toast.makeText(getBaseContext(),"SD Card Detected",Toast.LENGTH_SHORT).show();  
            }
            try {
                File myFile = new File("/mnt/extsd/MedeQuip.txt");
            /*  if(myFile.createNewFile()==false)
                {
                    Toast.makeText(getBaseContext(),"Unable to create File'",Toast.LENGTH_SHORT).show();    
                    return;
                }
                else
                    Toast.makeText(getBaseContext(),"File Created'",Toast.LENGTH_SHORT).show(); 
            */  FileOutputStream fOut = new FileOutputStream(myFile);
                OutputStreamWriter myOutWriter = new OutputStreamWriter(fOut);
                myOutWriter.append(txtData.getText());
                myOutWriter.close();
                fOut.close();
                Toast.makeText(getBaseContext(),"Done writing SD mysdfile.txt'",Toast.LENGTH_SHORT).show();
            } catch (Exception e) 
            {
                Toast.makeText(getBaseContext(), e.getMessage(),Toast.LENGTH_SHORT).show();
            }
        }// onClick
        }); // btnWriteSDFile

            btnReadSDFile = (Button) findViewById(R.id.btnReadSDFile);
            btnReadSDFile.setOnClickListener(new OnClickListener() 
            {

            public void onClick(View v) 
            {
                // write on SD card file data in the text box
            try
            {
                File myFile = new File(SDCard_Path+"/MedeQuip.txt");
                FileInputStream fIn = new FileInputStream(myFile);
                BufferedReader myReader = new BufferedReader(
                        new InputStreamReader(fIn));
                String aDataRow = "";
                String aBuffer = "";
                while ((aDataRow = myReader.readLine()) != null) {
                    aBuffer += aDataRow + "\n";
                }
                txtData.setText(aBuffer);
                myReader.close();
                Toast.makeText(getBaseContext(),"Done reading SD 'MedeQuip.txt'",Toast.LENGTH_SHORT).show();
            } 
            catch (Exception e) 
            {
                Toast.makeText(getBaseContext(), e.getMessage(),Toast.LENGTH_SHORT).show();
            }
            }// onClick
            }); // btnReadSDFile

            btnClearScreen = (Button) findViewById(R.id.btnClearScreen);
            btnClearScreen.setOnClickListener(new OnClickListener() {

                public void onClick(View v) {
                    // clear text box
                    txtData.setText("");
                }
            }); // btnClearScreen

            btnClose = (Button) findViewById(R.id.btnClose);
            btnClose.setOnClickListener(new OnClickListener() {

                public void onClick(View v) {
                    // clear text box
                    finish();
                }
            }); // btnClose

        }// onCreate

    }// AndSDcard

Here is my xml:

 <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
        xmlns:tools="http://schemas.android.com/tools"
        android:layout_width="match_parent"
        android:layout_height="match_parent">

        <EditText
    android:id="@+id/txtData"
    android:layout_width="fill_parent"
    android:layout_height="180px"
    android:textSize="18sp"  />

    <Button
        android:id="@+id/btnWriteSDFile"
        android:layout_width="143px"
        android:layout_height="44px"
        android:layout_alignParentLeft="true"
        android:layout_below="@+id/txtData"
        android:layout_marginTop="60dp"
        android:text="1. Write SD File" />

    <Button
        android:id="@+id/btnClearScreen"
        android:layout_width="141px"
        android:layout_height="42px"
        android:layout_alignBaseline="@+id/btnWriteSDFile"
        android:layout_alignBottom="@+id/btnWriteSDFile"
        android:layout_marginLeft="30dp"
        android:layout_toRightOf="@+id/btnWriteSDFile"
        android:text="2. Clear Screen" />

    <Button
        android:id="@+id/btnReadSDFile"
        android:layout_width="140px"
        android:layout_height="42px"
        android:layout_alignTop="@+id/btnWriteSDFile"
        android:layout_marginLeft="32dp"
        android:layout_toRightOf="@+id/btnClearScreen"
        android:text="3. Read SD File" />

    <Button
        android:id="@+id/btnClose"
        android:layout_width="141px"
        android:layout_height="43px"
        android:layout_alignTop="@+id/btnClearScreen"
        android:layout_marginLeft="61dp"
        android:layout_toRightOf="@+id/btnReadSDFile"
        android:text="4. Close" />

    </RelativeLayout>

Here is my manifest file:

    <?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.example.androidsdcard"
    android:versionCode="1"
    android:versionName="1.0" >

    <uses-sdk
        android:minSdkVersion="8"
        android:targetSdkVersion="18" />

    <application
        android:allowBackup="true"
        android:icon="@drawable/ic_launcher"
        android:label="@string/app_name"
        android:theme="@style/AppTheme" >
        <activity
            android:name=".MainActivity"
            android:label="@string/app_name" >
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>

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

Answer 1

You cannot assume external storage will always be at "/mnt/extsd". Very rarely will this be the case as it is up to the OEM where the mount points are. Use the standard APIs from the Context object to get the correct locations of interest: Context.getExternalFilesDir() and Context.getExternalFilesDirs() .

Answer 2

the problem is with jelly bean

this work for me

String path = null;
      if (android.os.Build.VERSION.SDK_INT < Build.VERSION_CODES.KITKAT){
          path = getActivity().getCacheDir() + File.separator + "name";
         } else{
          path = Environment.getExternalStorageDirectory() + File.separator + "name";
         }