copy android room database files from SD card failed
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I am using this Java Code for restoring android room database from SD card and it is works:
// Java
public static boolean copyToDirFromMultiFile(File dstDir, boolean
createDirsIfNotExist, File... srcFile) throws IOException {
if (createDirsIfNotExist && !dstDir.exists()) {
if (!dstDir.mkdirs()) return false;
}
for (File src : srcFile) {
File dstFile = new File(dstDir, src.getName());
try (InputStream inputStream = new FileInputStream(src); OutputStream outputStream = new FileOutputStream(dstFile)) {
byte buffer = new byte[1024];
int length;
while ((length = inputStream.read(buffer)) > 0) {
outputStream.write(buffer, 0, length);
}
}
}
return true;
}
And when I tried to implement it with following code of Kotlin
// Kotlin
private fun copyToDirFromMultiFile(dstDir: String, originDir: String, fileName: Array<String>) {
fileName.forEach {
File(originDir).resolve(it).copyTo(File(dstDir).resolve(it), true)
}
}
Database file has copied but I have to restart my app, please tell me something I'm missed, Thank you very much.
Here is document I have found:
copyTo
java
android kotlin asked Nov 29 '18 at 6:13
JavanJavan
9819
add a comment |
0
I am using this Java Code for restoring android room database from SD card and it is works:
// Java
public static boolean copyToDirFromMultiFile(File dstDir, boolean
createDirsIfNotExist, File... srcFile) throws IOException {
if (createDirsIfNotExist && !dstDir.exists()) {
if (!dstDir.mkdirs()) return false;
}
for (File src : srcFile) {
File dstFile = new File(dstDir, src.getName());
try (InputStream inputStream = new FileInputStream(src); OutputStream outputStream = new FileOutputStream(dstFile)) {
byte buffer = new byte[1024];
int length;
while ((length = inputStream.read(buffer)) > 0) {
outputStream.write(buffer, 0, length);
}
}
}
return true;
}
And when I tried to implement it with following code of Kotlin
// Kotlin
private fun copyToDirFromMultiFile(dstDir: String, originDir: String, fileName: Array<String>) {
fileName.forEach {
File(originDir).resolve(it).copyTo(File(dstDir).resolve(it), true)
}
}
Database file has copied but I have to restart my app, please tell me something I'm missed, Thank you very much.
Here is document I have found:
copyTo
java
android kotlin asked Nov 29 '18 at 6:13
JavanJavan
9819
When is the function called? Maybe the room database is initialized before copying is done?
– Christopher
Nov 29 '18 at 6:26
Hi @Christopher, call copyToDirFromMultiFile() function when user has pressed restore Button. And room database has been initialized when app start. I don't known why java code works very well but I have to restart app of kotlin code.
– Javan
Nov 29 '18 at 6:48
add a comment |
0
0
0
I am using this Java Code for restoring android room database from SD card and it is works:
// Java
public static boolean copyToDirFromMultiFile(File dstDir, boolean
createDirsIfNotExist, File... srcFile) throws IOException {
if (createDirsIfNotExist && !dstDir.exists()) {
if (!dstDir.mkdirs()) return false;
}
for (File src : srcFile) {
File dstFile = new File(dstDir, src.getName());
try (InputStream inputStream = new FileInputStream(src); OutputStream outputStream = new FileOutputStream(dstFile)) {
byte buffer = new byte[1024];
int length;
while ((length = inputStream.read(buffer)) > 0) {
outputStream.write(buffer, 0, length);
}
}
}
return true;
}
And when I tried to implement it with following code of Kotlin
// Kotlin
private fun copyToDirFromMultiFile(dstDir: String, originDir: String, fileName: Array<String>) {
fileName.forEach {
File(originDir).resolve(it).copyTo(File(dstDir).resolve(it), true)
}
}
Database file has copied but I have to restart my app, please tell me something I'm missed, Thank you very much.
Here is document I have found:
copyTo
java
android kotlin asked Nov 29 '18 at 6:13
JavanJavan
9819
I am using this Java Code for restoring android room database from SD card and it is works:
// Java
public static boolean copyToDirFromMultiFile(File dstDir, boolean
createDirsIfNotExist, File... srcFile) throws IOException {
if (createDirsIfNotExist && !dstDir.exists()) {
if (!dstDir.mkdirs()) return false;
}
for (File src : srcFile) {
File dstFile = new File(dstDir, src.getName());
try (InputStream inputStream = new FileInputStream(src); OutputStream outputStream = new FileOutputStream(dstFile)) {
byte buffer = new byte[1024];
int length;
while ((length = inputStream.read(buffer)) > 0) {
outputStream.write(buffer, 0, length);
}
}
}
return true;
}
And when I tried to implement it with following code of Kotlin
// Kotlin
private fun copyToDirFromMultiFile(dstDir: String, originDir: String, fileName: Array<String>) {
fileName.forEach {
File(originDir).resolve(it).copyTo(File(dstDir).resolve(it), true)
}
}
Database file has copied but I have to restart my app, please tell me something I'm missed, Thank you very much.
Here is document I have found:
copyTo
java
android kotlin java
android kotlin asked Nov 29 '18 at 6:13
JavanJavan
9819
asked Nov 29 '18 at 6:13
JavanJavan
9819
asked Nov 29 '18 at 6:13
JavanJavan
9819
asked Nov 29 '18 at 6:13
JavanJavan
9819
asked Nov 29 '18 at 6:13
JavanJavan
9819
9819
When is the function called? Maybe the room database is initialized before copying is done?
– Christopher
Nov 29 '18 at 6:26
Hi @Christopher, call copyToDirFromMultiFile() function when user has pressed restore Button. And room database has been initialized when app start. I don't known why java code works very well but I have to restart app of kotlin code.
– Javan
Nov 29 '18 at 6:48
add a comment |
When is the function called? Maybe the room database is initialized before copying is done?
– Christopher
Nov 29 '18 at 6:26
Hi @Christopher, call copyToDirFromMultiFile() function when user has pressed restore Button. And room database has been initialized when app start. I don't known why java code works very well but I have to restart app of kotlin code.
– Javan
Nov 29 '18 at 6:48
When is the function called? Maybe the room database is initialized before copying is done?
– Christopher
Nov 29 '18 at 6:26
When is the function called? Maybe the room database is initialized before copying is done?
– Christopher
Nov 29 '18 at 6:26
Hi @Christopher, call copyToDirFromMultiFile() function when user has pressed restore Button. And room database has been initialized when app start. I don't known why java code works very well but I have to restart app of kotlin code.
– Javan
Nov 29 '18 at 6:48
Hi @Christopher, call copyToDirFromMultiFile() function when user has pressed restore Button. And room database has been initialized when app start. I don't known why java code works very well but I have to restart app of kotlin code.
– Javan
Nov 29 '18 at 6:48
add a comment |
0
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When is the function called? Maybe the room database is initialized before copying is done?
– Christopher
Nov 29 '18 at 6:26
Hi @Christopher, call copyToDirFromMultiFile() function when user has pressed restore Button. And room database has been initialized when app start. I don't known why java code works very well but I have to restart app of kotlin code.
– Javan
Nov 29 '18 at 6:48