android와 함께 IText를 사용하여 PDF를 작성하는 동안 IOException 가져 오기

Question

Itext를 사용하여 PDF를 만들려고 시도하는 동안 IOException이 발생합니다. 오류는 내가 매니페스트 파일에 필요한 권한을 추가 한대로 읽기 전용 저장소에 쓰기를 시도하고 있다고 말합니다.

코도 바 3.5입니다.

public class PdfCreator { 
String TAG = "PdfCreator"; 

public void createPdf(){ 
    try { 
     Log.d(TAG, Environment.getExternalStorageDirectory().getPath() + "/Hello.pdf");    
     OutputStream file = new FileOutputStream(new File(Environment.getExternalStorageDirectory().getPath() + "/Hello.pdf"));    
     Document document = new Document(); 
     PdfWriter.getInstance(document, file); 
     document.open(); 
     document.add(new Paragraph("Hello world, iText")); 
     document.close(); 
     file.close(); 

    } catch (Exception e) { 

     e.printStackTrace(); 
    } 
} 

스테이크 추적 : 어떤 도움에 감사드립니다

09-08 05:15:42.501: W/System.err(1114): java.io.FileNotFoundException: /storage/sdcard/Hello.pdf:   open failed: EROFS (Read-only file system) 
09-08 05:15:42.531: W/System.err(1114):  at libcore.io.IoBridge.open(IoBridge.java:409) 
09-08 05:15:42.531: W/System.err(1114):  at java.io.FileOutputStream.<init>  (FileOutputStream.java:88) 
09-08 05:15:42.581: W/System.err(1114):  at java.io.FileOutputStream.<init> (FileOutputStream.java:73) 
09-08 05:15:42.581: W/System.err(1114):  at com.idsil.pdfapp.PdfCreator.createPdf(PdfCreator.java:19) 
09-08 05:15:42.581: W/System.err(1114):  at com.idsil.pdfapp.PdfApp.onCreate(PdfApp.java:36) 
09-08 05:15:42.581: W/System.err(1114):  at android.app.Activity.performCreate(Activity.java:5133) 
09-08 05:15:42.581: W/System.err(1114):  at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1087) 
09-08 05:15:42.581: W/System.err(1114):  at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2175) 
09-08 05:15:42.581: W/System.err(1114):  at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2261) 
09-08 05:15:42.591: W/System.err(1114):  at android.app.ActivityThread.access$600(ActivityThread.java:141) 
09-08 05:15:42.591: W/System.err(1114):  at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1256) 
09-08 05:15:42.631: W/System.err(1114):  at android.os.Handler.dispatchMessage(Handler.java:99) 
09-08 05:15:42.631: W/System.err(1114):  at android.os.Looper.loop(Looper.java:137) 
09-08 05:15:42.658: W/System.err(1114):  at android.app.ActivityThread.main(ActivityThread.java:5103) 
09-08 05:15:42.661: W/System.err(1114):  at java.lang.reflect.Method.invokeNative(Native Method) 
09-08 05:15:42.661: W/System.err(1114):  at java.lang.reflect.Method.invoke(Method.java:525) 
09-08 05:15:42.661: W/System.err(1114):  at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:737) 
09-08 05:15:42.661: W/System.err(1114):  at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:553) 
09-08 05:15:42.661: W/System.err(1114):  at dalvik.system.NativeStart.main(Native Method) 
09-08 05:15:42.691: W/System.err(1114): Caused by: libcore.io.ErrnoException: open failed: EROFS (Read-only file system) 
09-08 05:15:42.691: W/System.err(1114):  at libcore.io.Posix.open(Native Method) 
09-08 05:15:42.691: W/System.err(1114):  at libcore.io.BlockGuardOs.open(BlockGuardOs.java:110) 
09-08 05:15:42.691: W/System.err(1114):  at libcore.io.IoBridge.open(IoBridge.java:393) 

여기

는 코드입니다.

미리 감사드립니다.

Environment.getExternalStorageDirectory().getAbsolutePath()+"/Hello.pdf" 

use .getAbsolutePath() instead of .getPath().. 

이런 식으로 파일을 생성

Answer 1

이 시도,

InputStream input = null; 
OutputStream output = null; 

File folder = new File("/sdcard", "hellofolder"); 
folder.mkdirs(); 

File myFile = new File("/sdcard/hellofolder/hello.pdf"); 
output = new FileOutputStream(myFile); 

Mainfest.xml

매니페스트

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

또는의 자식으로이 추가 일단 실제 장치로 시도하십시오. 또는

Answer 2

이
eString filePath = context.getFilesDir().getPath().toString() + "/Hello.pdf"; File f = new File(filePath); OutputStream file = new FileOutputStream(f);