打开失败：虚拟设备中的EACCES（权限被拒绝）

我最近更改了计算机，因此必须重新安装ADT。从那时起，我一直在虚拟设备中发现这个错误。打开失败：虚拟设备中的EACCES（权限被拒绝）

的logcat：

04-13 07:50:00.232: E/MailApp(2000): Could not send email 
04-13 07:50:00.232: E/MailApp(2000): javax.mail.MessagingException: IOException while sending message; 
04-13 07:50:00.232: E/MailApp(2000): nested exception is: 
04-13 07:50:00.232: E/MailApp(2000): java.io.FileNotFoundException: /mnt/sdcard/csvname.csv: open failed: EACCES (Permission denied) 
04-13 07:50:00.232: E/MailApp(2000): at com.sun.mail.smtp.SMTPTransport.sendMessage(SMTPTransport.java:676) 
04-13 07:50:00.232: E/MailApp(2000): at javax.mail.Transport.send0(Transport.java:189) 
04-13 07:50:00.232: E/MailApp(2000): at javax.mail.Transport.send(Transport.java:118) 
04-13 07:50:00.232: E/MailApp(2000): at com.example.blueharvest.Mail.send(Mail.java:125) 
04-13 07:50:00.232: E/MailApp(2000): at com.example.blueharvest.ChargeActivity$6.onClick(ChargeActivity.java:213) 
04-13 07:50:00.232: E/MailApp(2000): at android.view.View.performClick(View.java:4204) 
04-13 07:50:00.232: E/MailApp(2000): at android.view.View$PerformClick.run(View.java:17355) 
04-13 07:50:00.232: E/MailApp(2000): at android.os.Handler.handleCallback(Handler.java:725) 
04-13 07:50:00.232: E/MailApp(2000): at android.os.Handler.dispatchMessage(Handler.java:92) 
04-13 07:50:00.232: E/MailApp(2000): at android.os.Looper.loop(Looper.java:137) 
04-13 07:50:00.232: E/MailApp(2000): at android.app.ActivityThread.main(ActivityThread.java:5041) 
04-13 07:50:00.232: E/MailApp(2000): at java.lang.reflect.Method.invokeNative(Native Method) 
04-13 07:50:00.232: E/MailApp(2000): at java.lang.reflect.Method.invoke(Method.java:511) 
04-13 07:50:00.232: E/MailApp(2000): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:793) 
04-13 07:50:00.232: E/MailApp(2000): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:560) 
04-13 07:50:00.232: E/MailApp(2000): at dalvik.system.NativeStart.main(Native Method) 
04-13 07:50:00.232: E/MailApp(2000): Caused by: java.io.FileNotFoundException: /mnt/sdcard/csvname.csv: open failed: EACCES (Permission denied) 
04-13 07:50:00.232: E/MailApp(2000): at libcore.io.IoBridge.open(IoBridge.java:416) 
04-13 07:50:00.232: E/MailApp(2000): at java.io.FileInputStream.<init>(FileInputStream.java:78) 
04-13 07:50:00.232: E/MailApp(2000): at javax.activation.FileDataSource.getInputStream(FileDataSource.java:110) 
04-13 07:50:00.232: E/MailApp(2000): at javax.activation.DataHandler.writeTo(DataHandler.java:318) 
04-13 07:50:00.232: E/MailApp(2000): at javax.mail.internet.MimeBodyPart.writeTo(MimeBodyPart.java:1403) 
04-13 07:50:00.232: E/MailApp(2000): at javax.mail.internet.MimeBodyPart.writeTo(MimeBodyPart.java:874) 
04-13 07:50:00.232: E/MailApp(2000): at javax.mail.internet.MimeMultipart.writeTo(MimeMultipart.java:444) 
04-13 07:50:00.232: E/MailApp(2000): at com.sun.mail.handlers.multipart_mixed.writeTo(multipart_mixed.java:102) 
04-13 07:50:00.232: E/MailApp(2000): at javax.activation.ObjectDataContentHandler.writeTo(DataHandler.java:897) 
04-13 07:50:00.232: E/MailApp(2000): at javax.activation.DataHandler.writeTo(DataHandler.java:330) 
04-13 07:50:00.232: E/MailApp(2000): at javax.mail.internet.MimeBodyPart.writeTo(MimeBodyPart.java:1403) 
04-13 07:50:00.232: E/MailApp(2000): at javax.mail.internet.MimeMessage.writeTo(MimeMessage.java:1745) 
04-13 07:50:00.232: E/MailApp(2000): at com.sun.mail.smtp.SMTPTransport.sendMessage(SMTPTransport.java:636) 
04-13 07:50:00.232: E/MailApp(2000): ... 15 more 
04-13 07:50:00.232: E/MailApp(2000): Caused by: libcore.io.ErrnoException: open failed: EACCES (Permission denied) 
04-13 07:50:00.232: E/MailApp(2000): at libcore.io.Posix.open(Native Method) 
04-13 07:50:00.232: E/MailApp(2000): at libcore.io.BlockGuardOs.open(BlockGuardOs.java:110) 
04-13 07:50:00.232: E/MailApp(2000): at libcore.io.IoBridge.open(IoBridge.java:400) 
04-13 07:50:00.232: E/MailApp(2000): ... 27 more

清单：

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

代码：

public void exportDb(Context context) { 

    SQLiteDatabase _db = this.getReadableDatabase(); 
    //File exportDir = new File(Environment.getExternalStorageDirectory().getPath(), ""); 
    File exportDir = getDir(context); 

    if (!exportDir.exists()) 
    { 
     exportDir.mkdirs(); 
    } 

    File file = new File(exportDir, "csvname.csv"); 
    try 
    { 
     file.createNewFile();    
     CSVWriter csvWrite = new CSVWriter(new FileWriter(file)); 
     SQLiteDatabase db = this.getReadableDatabase(); 
     Cursor curCSV = db.rawQuery("SELECT * FROM chrgData",null); 
     csvWrite.writeNext(curCSV.getColumnNames()); 
     while(curCSV.moveToNext()) 
     { 
      //Which column you want to export 
      String arrStr[] ={curCSV.getString(0),curCSV.getString(1), curCSV.getString(2), curCSV.getString(3), curCSV.getString(4)}; 
      csvWrite.writeNext(arrStr); 
     } 
     csvWrite.close(); 
     curCSV.close(); 
    } 
    catch(Exception sqlEx) 
    { 
     Log.e("MainActivity", sqlEx.getMessage(), sqlEx); 
    } 
    _db.close(); 
} 

public File getDir(Context context) { 
    File exportDir; 
    if (android.os.Environment.getExternalStorageState().equals(android.os.Environment.MEDIA_MOUNTED)) { 
     exportDir = new File(android.os.Environment.getExternalStorageDirectory(),""); 
    } else { 
     exportDir = context.getCacheDir(); 
    }     
    return exportDir; 
}

任何和所有帮助将不胜感激，并请让我知道如果任何其他信息需要。

在此先感谢，

布拉德。

来源

2013-04-13 Brad Bass

Brad，请检查您的虚拟设备是否具有SDCard支持属性集。我不确定，但这可能是原因。 – FireAndIce

根据您定位的Android版本，您可能还需要添加''http://developer.android.com/reference/android/Manifest .permission.html＃READ_EXTERNAL_STORAGE – Squonk

@FireAndIce＆Squonk - 非常感谢您的快速回复。所以事实证明这是虚拟设备。实际上，我曾尝试重新创建虚拟设备，但只是重新创建了一次，并且这次改变了大小。现在它再次工作:)。我还在外部存储上添加了读取权限，以防万一。非常感谢。 –

原来的错误是由于虚拟设备的问题引起的。删除并重新创建设备，错误不再。

来源

2013-04-18 19:48:15

打开失败：虚拟设备中的EACCES（权限被拒绝）

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