Google Glass Eye Gesture Crashing (EyeGestureLib)

问题

I am trying to check Wink from Glass using the EyeGestureLib.

I created a new project and did exactly what the guy did with the sample project here.

The problem part of my code is below:

private EyeGestureManager mEyeGestureManager;
private EyeGestureListener mEyeGestureListener;

private EyeGesture target1 = EyeGesture.WINK;
private EyeGesture target2 = EyeGesture.DOUBLE_BLINK;

Inside onCreate, I have:

    mEyeGestureManager = EyeGestureManager.from(this);
    mEyeGestureListener = new EyeGestureListener();

    // print out each eye gesture is supported or not
    for (EyeGesture eg : EyeGesture.values()) {
        boolean supported = mEyeGestureManager.isSupported(eg);
        Log.d(TAG, eg.name() + ":" + supported);
    }

My program crashes immediately after opening. I realize that the problem is when it tries to access mEyeGestureManager. Any where in the code that uses mEyeGestureManager will make the program crash.According to what I observed, mEyeGestureManager is null even after mEyeGestureManager = EyeGestureManager.from(this);

When I change

mEyeGestureManager = EyeGestureManager.from(this);

to

mEyeGestureManager = new EyeGestureManager();

it stops crashing and mEyeGestureManager is no longer null but won't detect wink, or double wink.

My glass was running XE21 but I downgraded it to XE18.3 because my research shows that EyeGestureLib wont work properly on Glass version > XE18.3.

EyeGestures NOT working in 19.1

https://github.com/thorikawa/EyeGestureLib/issues/2

Now I have XE18.3 but it is not working. Wink is not working when I have mEyeGestureManager = new EyeGestureManager(); and I get:

Supported:﹕ BLINK:false
Supported:﹕ DOFF:false
Supported:﹕ DON:false
Supported:﹕ DOUBLE_BLINK:false
Supported:﹕ DOUBLE_WINK:false
Supported:﹕ LOOK_AT_SCREEN:false
Supported:﹕ LOOK_AWAY_FROM_SCREEN:false
Supported:﹕ WINK:false

But when I have:

mEyeGestureManager = EyeGestureManager.from(this);

it crashes right away.

I went and installed already compiled example "EyeGestureDemo-debug-1.1.apk" and that WORKED very well but mine does not.

What am I doing wrong? I have been trying to do this for 3 days now. Google doesn't have an official API for this but I don't want to wait till they release one. I need this for my school project ASAP. Anyone got any ideas of what might be the problem?

EDIT: CRASH LOG

12-02 09:39:54.347    3758-3758/com.inno.inno.glassplugin D/AndroidRuntime﹕ Shutting down VM
12-02 09:39:54.347    3758-3758/com.inno.inno.glassplugin W/dalvikvm﹕ threadid=1: thread exiting with uncaught exception (group=0x41f78bd8)
12-02 09:39:54.363    3758-3758/com.inno.inno.glassplugin E/AndroidRuntime﹕ FATAL EXCEPTION: main
    Process: com.inno.inno.glassplugin, PID: 3758
    java.lang.RuntimeException: Unable to start activity ComponentInfo{com.inno.inno.glassplugin/com.inno.inno.glassplugin.MainActivity}: java.lang.NullPointerException
            at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2235)
            at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2285)
            at android.app.ActivityThread.access$800(ActivityThread.java:138)
            at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1236)
            at android.os.Handler.dispatchMessage(Handler.java:102)
            at android.os.Looper.loop(Looper.java:149)
            at android.app.ActivityThread.main(ActivityThread.java:5061)
            at java.lang.reflect.Method.invokeNative(Native Method)
            at java.lang.reflect.Method.invoke(Method.java:515)
            at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:786)
            at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:602)
            at dalvik.system.NativeStart.main(Native Method)
     Caused by: java.lang.NullPointerException
            at com.inno.inno.glassplugin.MainActivity.onCreate(MainActivity.java:92)
            at android.app.Activity.performCreate(Activity.java:5236)
            at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1089)
            at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2199)
            at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2285)
            at android.app.ActivityThread.access$800(ActivityThread.java:138)
            at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1236)
            at android.os.Handler.dispatchMessage(Handler.java:102)
            at android.os.Looper.loop(Looper.java:149)
            at android.app.ActivityThread.main(ActivityThread.java:5061)
            at java.lang.reflect.Method.invokeNative(Native Method)
            at java.lang.reflect.Method.invoke(Method.java:515)
            at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:786)
            at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:602)
            at dalvik.system.NativeStart.main(Native Method)

回答1:

The API has changed a long time ago (around XE 20 I think).

I had to do quite a bit of digging with reflection to figure out the workings of EyeGestureManager.

Here's my updated version, along with some sample code demonstrating usage: https://gist.github.com/victorkp/9094a6aea9db236a97f3

来源：https://stackoverflow.com/questions/27214236/google-glass-eye-gesture-crashing-eyegesturelib