UnsatisfiedLinkError: No implementation found

[jbmlaird]

My first foray into the Android NDK so perhaps I'm doing this wrong, but having just changed the name of the package from com.jventura to com.randompkg and then changing pybridge.c to

JNIEXPORT jint JNICALL Java_com_randompkg_pybridge_PyBridge_start JNIEXPORT jint JNICALL Java_com_randompkg_pybridge_PyBridge_stop JNIEXPORT jint JNICALL Java_com_randompkg_pybridge_PyBridge_call

causes me to get this stack trace:

11-13 22:03:28.172 18981-18981/com.jventura.pyapp E/art: No implementation found for int com.randompkg.pybridge.PyBridge.start(java.lang.String) (tried Java_com_randompkg_pybridge_PyBridge_start and Java_com_randompkg_pybridge_PyBridge_start__Ljava_lang_String_2)
11-13 22:03:28.173 18981-18981/com.jventura.pyapp D/AndroidRuntime: Shutting down VM
11-13 22:03:28.174 18981-18981/com.jventura.pyapp E/AndroidRuntime: FATAL EXCEPTION: main
                                                                    Process: com.jventura.pyapp, PID: 18981
                                                                    java.lang.UnsatisfiedLinkError: No implementation found for int com.randompkg.pybridge.PyBridge.start(java.lang.String) (tried Java_com_randompkg_pybridge_PyBridge_start and Java_com_randompkg_pybridge_PyBridge_start__Ljava_lang_String_2)
                                                                        at com.randompkg.pybridge.PyBridge.start(Native Method)
                                                                        at com.randompkg.pyapp.MainActivity.onCreate(MainActivity.java:29)
                                                                        at android.app.Activity.performCreate(Activity.java:6672)
                                                                        at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1140)
                                                                        at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2612)
                                                                        at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2724)
                                                                        at android.app.ActivityThread.-wrap12(ActivityThread.java)
                                                                        at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1473)
                                                                        at android.os.Handler.dispatchMessage(Handler.java:102)
                                                                        at android.os.Looper.loop(Looper.java:154)
                                                                        at android.app.ActivityThread.main(ActivityThread.java:6123)
                                                                        at java.lang.reflect.Method.invoke(Native Method)
                                                                        at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:867)
                                                                        at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:757)

PyBridge.java remains as:

package com.randompkg.pybridge;

import org.json.JSONObject;
import org.json.JSONException;

public class PyBridge {
...

Is there anything else I need to change?

[jbmlaird]

I had to run ndk-build again:

From the instructions: cd to app/src/main/jni, and run path/to/crystax/ndk-build

[ZhangKuixun]

@jbmlaird How to solve this problem?

[mahendrarajdhami]

i have run ndk-build and there are libcrystax, libpython3.5 and libpybridge in src/main/libs/armeabi-v7a & src/main/libs/x86 but still it's giving same error.

[mahendrarajdhami]

i fixed above issue by modifying jni/pybridge.c . we have to change JNICALL according to our package name