Unable to create and copy file
My program should work like this:
1.Copy the new database in the program folder
2.Import the records from the old database to the new one.
But I am getting an exception for some reason. Why?
protected Object doInBackground(Object[] objects) {
String LOCAL_DATABASE_PATH = getApplicationInfo().dataDir + File.separator +
"databases" + File.separator;
File fileDir = new File(LOCAL_DATABASE_PATH);
if (!fileDir.exists())
fileDir.mkdirs();
File tempFile = new File(LOCAL_DATABASE_PATH + DATABASE_NAME);
try {
tempFile.createNewFile(); // here I catch exception
InputStream is = SplashActivity.this.getAssets().open(
DATABASE_NAME);
FileOutputStream os = new FileOutputStream(new File(
LOCAL_DATABASE_PATH, DATABASE_NAME));
int bufferLength = 0;
byte[] buffer = new byte[2048];
while ((bufferLength = is.read(buffer)) > 0) {
os.write(buffer, 0, bufferLength);
}
Preferences.getInstance(SplashActivity.this).
set(Preferences.IS_DATABASE_COPYING_ON_DEVICE, true);
is.close();
os.close();
} catch (IOException e) {
e.printStackTrace();
}
return null;
}
I am getting the following error
java.io.IOException: open failed: EACCES (Permission denied)
08-28 09:32:27.977 32558-32558/com.DriverNotes.AndroidMobileClientTest D/libEGLīš loaded /system/lib/egl/libGLES_hawaii.so
08-28 09:32:27.977 32558-32587/com.DriverNotes.AndroidMobileClientTest W/System.errīš at java.io.File.createNewFile(File.java:948)
08-28 09:32:27.977 32558-32587/com.DriverNotes.AndroidMobileClientTest W/System.errīš at com.DriverNotes.AndroidMobileClientTest.SplashActivity$DataBaseLoadTask.doInBackground(SplashActivity.java:73)
08-28 09:32:27.977 32558-32587/com.DriverNotes.AndroidMobileClientTest W/System.errīš at android.os.AsyncTask$2.call(AsyncTask.java:287)
08-28 09:32:27.977 32558-32587/com.DriverNotes.AndroidMobileClientTest W/System.errīš at java.util.concurrent.FutureTask.run(FutureTask.java:234)
08-28 09:32:27.977 32558-32587/com.DriverNotes.AndroidMobileClientTest W/System.errīš at android.os.AsyncTask$SerialExecutor$1.run(AsyncTask.java:230)
08-28 09:32:27.977 32558-32587/com.DriverNotes.AndroidMobileClientTest W/System.errīš at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1080)
08-28 09:32:27.977 32558-32587/com.DriverNotes.AndroidMobileClientTest W/System.errīš at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:573)
08-28 09:32:27.977 32558-32587/com.DriverNotes.AndroidMobileClientTest W/System.errīš at java.lang.Thread.run(Thread.java:856)
08-28 09:32:27.987 32558-32587/com.DriverNotes.AndroidMobileClientTest W/System.errīš Caused by: libcore.io.ErrnoException: open failed: EACCES (Permission denied)
08-28 09:32:27.987 32558-32587/com.DriverNotes.AndroidMobileClientTest W/System.errīš at libcore.io.Posix.open(Native Method)
08-28 09:32:27.987 32558-32587/com.DriverNotes.AndroidMobileClientTest W/System.errīš at libcore.io.BlockGuardOs.open(BlockGuardOs.java:110)
08-28 09:32:27.987 32558-32587/com.DriverNotes.AndroidMobileClientTest W/System.errīš at java.io.File.createNewFile(File.java:941)
08-28 09:32:27.987 32558-32587/com.DriverNotes.AndroidMobileClientTest W/System.errīš ... 7 more
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1 answer
When creating, tempFile
try using the fileDir
one you already created to make sure it exists.
File tempFile = new File(fileDir, DATABASE_NAME);
Before creating a new file, you must check if it exists by calling its method exits()
. And then instead of opening it again, you should keep using it. Or at least close it before opening it again.
if(!tempFile.exists())
tempFile.createNewFile();
InputStream is = SplashActivity.this.getAssets().open(
DATABASE_NAME);
FileOutputStream os = new FileOutputStream(tempFile);
Create FileOutPutStream
with tempFile
or tempFile
to make sure your file is not locked.
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