No implementation found for boolean
I'm trying to call the function but I get the following error
Caused by: java.lang.UnsatisfiedLinkError: No implementation found for
boolean com.example.rosaa.ftp.FTPClient.ftpIsConnected() (tried
Java_com_example_rosaa_ftp_FTPClient_ftpIsConnected and
Java_com_example_rosaa_ftp_FTPClient_ftpIsConnected__)
at com.example.rosaa.ftp.FTPClient.ftpIsConnected(Native Method)
at com.example.rosaa.ftp.FTPClient.isConnected(FTPClient.java:227)
at com.example.rosaa.myapplication.tasks.CheckDroneNetworkAvailabilityTask.doInBackground(CheckDroneNetworkAvailabilityTask.java:86)
here is the function
private native boolean ftpIsConnected();
function in jni
JNIEXPORT jboolean JNICALL
Java_com_example_rosaa_ftp_FTPClient_ftpIsConnected(JNIEnv *env, jobject obj)
{
_ftp_t* ftp = get_ftp_handle(env, obj);
if (ftp != NULL) {
return (ftp->connected>0?TRUE:FALSE);
}
return FALSE;
}
android 
android-studio jni asked Nov 18 '18 at 23:26
rarrrarr
1
add a comment |
I'm trying to call the function but I get the following error
Caused by: java.lang.UnsatisfiedLinkError: No implementation found for
boolean com.example.rosaa.ftp.FTPClient.ftpIsConnected() (tried
Java_com_example_rosaa_ftp_FTPClient_ftpIsConnected and
Java_com_example_rosaa_ftp_FTPClient_ftpIsConnected__)
at com.example.rosaa.ftp.FTPClient.ftpIsConnected(Native Method)
at com.example.rosaa.ftp.FTPClient.isConnected(FTPClient.java:227)
at com.example.rosaa.myapplication.tasks.CheckDroneNetworkAvailabilityTask.doInBackground(CheckDroneNetworkAvailabilityTask.java:86)
here is the function
private native boolean ftpIsConnected();
function in jni
JNIEXPORT jboolean JNICALL
Java_com_example_rosaa_ftp_FTPClient_ftpIsConnected(JNIEnv *env, jobject obj)
{
_ftp_t* ftp = get_ftp_handle(env, obj);
if (ftp != NULL) {
return (ftp->connected>0?TRUE:FALSE);
}
return FALSE;
}
asked Nov 18 '18 at 23:26
rarrrarr
1
1
Did you forget toSystem.loadLibrary?
– minmaxavg
Nov 19 '18 at 1:13
add a comment |
I'm trying to call the function but I get the following error
Caused by: java.lang.UnsatisfiedLinkError: No implementation found for
boolean com.example.rosaa.ftp.FTPClient.ftpIsConnected() (tried
Java_com_example_rosaa_ftp_FTPClient_ftpIsConnected and
Java_com_example_rosaa_ftp_FTPClient_ftpIsConnected__)
at com.example.rosaa.ftp.FTPClient.ftpIsConnected(Native Method)
at com.example.rosaa.ftp.FTPClient.isConnected(FTPClient.java:227)
at com.example.rosaa.myapplication.tasks.CheckDroneNetworkAvailabilityTask.doInBackground(CheckDroneNetworkAvailabilityTask.java:86)
here is the function
private native boolean ftpIsConnected();
function in jni
JNIEXPORT jboolean JNICALL
Java_com_example_rosaa_ftp_FTPClient_ftpIsConnected(JNIEnv *env, jobject obj)
{
_ftp_t* ftp = get_ftp_handle(env, obj);
if (ftp != NULL) {
return (ftp->connected>0?TRUE:FALSE);
}
return FALSE;
}
asked Nov 18 '18 at 23:26
rarrrarr
1
I'm trying to call the function but I get the following error
Caused by: java.lang.UnsatisfiedLinkError: No implementation found for
boolean com.example.rosaa.ftp.FTPClient.ftpIsConnected() (tried
Java_com_example_rosaa_ftp_FTPClient_ftpIsConnected and
Java_com_example_rosaa_ftp_FTPClient_ftpIsConnected__)
at com.example.rosaa.ftp.FTPClient.ftpIsConnected(Native Method)
at com.example.rosaa.ftp.FTPClient.isConnected(FTPClient.java:227)
at com.example.rosaa.myapplication.tasks.CheckDroneNetworkAvailabilityTask.doInBackground(CheckDroneNetworkAvailabilityTask.java:86)
here is the function
private native boolean ftpIsConnected();
function in jni
JNIEXPORT jboolean JNICALL
Java_com_example_rosaa_ftp_FTPClient_ftpIsConnected(JNIEnv *env, jobject obj)
{
_ftp_t* ftp = get_ftp_handle(env, obj);
if (ftp != NULL) {
return (ftp->connected>0?TRUE:FALSE);
}
return FALSE;
}
asked Nov 18 '18 at 23:26
rarrrarr
1
asked Nov 18 '18 at 23:26
rarrrarr
1
asked Nov 18 '18 at 23:26
rarrrarr
1
asked Nov 18 '18 at 23:26
rarrrarr
1
asked Nov 18 '18 at 23:26
rarrrarr
1
1
1
Did you forget toSystem.loadLibrary?
– minmaxavg
Nov 19 '18 at 1:13
add a comment |
1
Did you forget toSystem.loadLibrary?
– minmaxavg
Nov 19 '18 at 1:13
1
1
Did you forget to
System.loadLibrary?– minmaxavg
Nov 19 '18 at 1:13
Did you forget to
System.loadLibrary?– minmaxavg
Nov 19 '18 at 1:13
add a comment |
1 Answer
1
active
oldest
votes
You need to give the function an implementation that returns a boolean.
private native boolean ftpIsConnected() {
///Some logic will eventually go here
return true;
}
answered Nov 18 '18 at 23:40
Ben AveryBen Avery
1,40311731
it can not "native methods cannot hace a body"
– rarr
Nov 18 '18 at 23:43
Are you inside an interface class. If so you can't create implementations of functions.
– Ben Avery
Nov 18 '18 at 23:45
You will need to create a class that implements that interface. Then you will need to to add function body and call it from an instance of that class.
– Ben Avery
Nov 18 '18 at 23:46
1
Note thenativekeyword. Such functions do not have a Java implementation. The implementation will be made in native code (e.g. C or C++).
– Michael
Nov 19 '18 at 7:30
add a comment |
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1 Answer
1
active
oldest
votes
1 Answer
1
active
oldest
votes
active
oldest
votes
active
oldest
votes
You need to give the function an implementation that returns a boolean.
private native boolean ftpIsConnected() {
///Some logic will eventually go here
return true;
}
answered Nov 18 '18 at 23:40
Ben AveryBen Avery
1,40311731
it can not "native methods cannot hace a body"
– rarr
Nov 18 '18 at 23:43
Are you inside an interface class. If so you can't create implementations of functions.
– Ben Avery
Nov 18 '18 at 23:45
You will need to create a class that implements that interface. Then you will need to to add function body and call it from an instance of that class.
– Ben Avery
Nov 18 '18 at 23:46
1
Note thenativekeyword. Such functions do not have a Java implementation. The implementation will be made in native code (e.g. C or C++).
– Michael
Nov 19 '18 at 7:30
add a comment |
You need to give the function an implementation that returns a boolean.
private native boolean ftpIsConnected() {
///Some logic will eventually go here
return true;
}
answered Nov 18 '18 at 23:40
Ben AveryBen Avery
1,40311731
it can not "native methods cannot hace a body"
– rarr
Nov 18 '18 at 23:43
Are you inside an interface class. If so you can't create implementations of functions.
– Ben Avery
Nov 18 '18 at 23:45
You will need to create a class that implements that interface. Then you will need to to add function body and call it from an instance of that class.
– Ben Avery
Nov 18 '18 at 23:46
1
Note thenativekeyword. Such functions do not have a Java implementation. The implementation will be made in native code (e.g. C or C++).
– Michael
Nov 19 '18 at 7:30
add a comment |
You need to give the function an implementation that returns a boolean.
private native boolean ftpIsConnected() {
///Some logic will eventually go here
return true;
}
answered Nov 18 '18 at 23:40
Ben AveryBen Avery
1,40311731
You need to give the function an implementation that returns a boolean.
private native boolean ftpIsConnected() {
///Some logic will eventually go here
return true;
}
answered Nov 18 '18 at 23:40
Ben AveryBen Avery
1,40311731
answered Nov 18 '18 at 23:40
Ben AveryBen Avery
1,40311731
answered Nov 18 '18 at 23:40
Ben AveryBen Avery
1,40311731
answered Nov 18 '18 at 23:40
Ben AveryBen Avery
1,40311731
1,40311731
it can not "native methods cannot hace a body"
– rarr
Nov 18 '18 at 23:43
Are you inside an interface class. If so you can't create implementations of functions.
– Ben Avery
Nov 18 '18 at 23:45
You will need to create a class that implements that interface. Then you will need to to add function body and call it from an instance of that class.
– Ben Avery
Nov 18 '18 at 23:46
1
Note thenativekeyword. Such functions do not have a Java implementation. The implementation will be made in native code (e.g. C or C++).
– Michael
Nov 19 '18 at 7:30
add a comment |
it can not "native methods cannot hace a body"
– rarr
Nov 18 '18 at 23:43
Are you inside an interface class. If so you can't create implementations of functions.
– Ben Avery
Nov 18 '18 at 23:45
You will need to create a class that implements that interface. Then you will need to to add function body and call it from an instance of that class.
– Ben Avery
Nov 18 '18 at 23:46
1
Note thenativekeyword. Such functions do not have a Java implementation. The implementation will be made in native code (e.g. C or C++).
– Michael
Nov 19 '18 at 7:30
it can not "native methods cannot hace a body"
– rarr
Nov 18 '18 at 23:43
it can not "native methods cannot hace a body"
– rarr
Nov 18 '18 at 23:43
Are you inside an interface class. If so you can't create implementations of functions.
– Ben Avery
Nov 18 '18 at 23:45
Are you inside an interface class. If so you can't create implementations of functions.
– Ben Avery
Nov 18 '18 at 23:45
You will need to create a class that implements that interface. Then you will need to to add function body and call it from an instance of that class.
– Ben Avery
Nov 18 '18 at 23:46
You will need to create a class that implements that interface. Then you will need to to add function body and call it from an instance of that class.
– Ben Avery
Nov 18 '18 at 23:46
1
1
Note the
native keyword. Such functions do not have a Java implementation. The implementation will be made in native code (e.g. C or C++).– Michael
Nov 19 '18 at 7:30
Note the
native keyword. Such functions do not have a Java implementation. The implementation will be made in native code (e.g. C or C++).– Michael
Nov 19 '18 at 7:30
add a comment |
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1
Did you forget to
System.loadLibrary?– minmaxavg
Nov 19 '18 at 1:13