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POabout calling native method in android
 

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    <p>Really need help. I am stuck here. Thank you for any suggestion here.</p> <p>I am using NDK to build a so library then call it in java. But I can only call it in the mainactivity which is the start up activity, if I try to call it in another activity which is initiated by the mainactivity, it will fail. I call the method in the <code>OnCreate</code> method of each activity, the code is very simple as following:</p> <pre><code>System.loadLibrary("svm-predict"); double dd = predictbattery("fsdfsdf", "sdfsdf", 0); </code></pre> <p>The stack for the error is:</p> <pre><code>12-08 00:47:08.153: E/AndroidRuntime(13370): FATAL EXCEPTION: main 12-08 00:47:08.153: E/AndroidRuntime(13370): java.lang.UnsatisfiedLinkError: predictbattery 12-08 00:47:08.153: E/AndroidRuntime(13370): at com.dash.RunningLogActivity.predictbattery(Native Method) 12-08 00:47:08.153: E/AndroidRuntime(13370): at com.dash.RunningLogActivity.onCreate(RunningLogActivity.java:58) 12-08 00:47:08.153: E/AndroidRuntime(13370): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1047) 12-08 00:47:08.153: E/AndroidRuntime(13370): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1611) 12-08 00:47:08.153: E/AndroidRuntime(13370): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1663) 12-08 00:47:08.153: E/AndroidRuntime(13370): at android.app.ActivityThread.access$1500(ActivityThread.java:117) 12-08 00:47:08.153: E/AndroidRuntime(13370): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:931) 12-08 00:47:08.153: E/AndroidRuntime(13370): at android.os.Handler.dispatchMessage(Handler.java:99) 12-08 00:47:08.153: E/AndroidRuntime(13370): at android.os.Looper.loop(Looper.java:123) 12-08 00:47:08.153: E/AndroidRuntime(13370): at android.app.ActivityThread.main(ActivityThread.java:3683) 12-08 00:47:08.153: E/AndroidRuntime(13370): at java.lang.reflect.Method.invokeNative(Native Method) 12-08 00:47:08.153: E/AndroidRuntime(13370): at java.lang.reflect.Method.invoke(Method.java:507) 12-08 00:47:08.153: E/AndroidRuntime(13370): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:839) 12-08 00:47:08.153: E/AndroidRuntime(13370): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:597) 12-08 00:47:08.153: E/AndroidRuntime(13370): at dalvik.system.NativeStart.main(Native Method) </code></pre>
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