Download Mode isn't work?

[Lua12138]

I try to do with Getting Started

• CrossWalk Version: 23.53.589.4
• Android Version: API 19

public class MainActivity extends XWalkActivity implements XWalkInitializer.XWalkInitListener,
        XWalkUpdater.XWalkBackgroundUpdateListener {
    private XWalkView browser;
    private XWalkResourceClient resourceClient;
    private XWalkUIClient uiClient;
    XWalkInitializer mXWalkInitializer;
    XWalkUpdater mXWalkUpdater;

    protected final static String TAG = "[MainActivity]";

    @Override
    protected void onXWalkReady() {
        Log.d(TAG, "onXWalkReady");
    }

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);

        mXWalkInitializer = new XWalkInitializer(this, this);
        mXWalkInitializer.initAsync();

        this.setContentView(R.layout.main_activity);

        this.browser = (XWalkView) findViewById(R.id.browser);
    }

    @Override
    protected void onResume() {
        super.onResume();
        mXWalkInitializer.initAsync();
    }

    @Override
    public void onXWalkInitStarted() {
    }

    @Override
    public void onXWalkInitCancelled() {
        Log.e(TAG, "onXWalkInitCancelled");
        finish();
    }

    @Override
    public void onXWalkInitFailed() {
        // Initialization failed. Trigger the Crosswalk runtime download
        if (mXWalkUpdater == null) {
            mXWalkUpdater = new XWalkUpdater(this, this);
        }
        mXWalkUpdater.updateXWalkRuntime();
    }

    @Override
    public void onXWalkInitCompleted() {
        // Initialization successfully, ready to invoke any XWalk embedded API
    }

    @Override
    public void onXWalkUpdateStarted() {
    }

    @Override
    public void onXWalkUpdateProgress(int percentage) {
        Log.d(TAG, "XWalkUpdate progress: " + percentage);
    }

    @Override
    public void onXWalkUpdateCancelled() {
        Log.e(TAG, "onXWalkUpdateCancelled");
        finish();
    }

    @Override
    public void onXWalkUpdateFailed() {
        Log.e(TAG, "onXWalkUpdateFailed");
        finish();
    }

    @Override
    public void onXWalkUpdateCompleted() {
        // Crosswalk Runtime update finished, re-init again.
        mXWalkInitializer.initAsync();
    }
}

But it failed. Here is the logcat:

10-19 18:06:50.493 15837-15837/? D/dalvikvm: Late-enabling CheckJNI
10-19 18:06:50.517 15837-15837/? D/dalvikvm: DexOpt: couldn't find static field Landroid/os/Build;.SUPPORTED_ABIS
10-19 18:06:50.517 15837-15837/? W/dalvikvm: VFY: unable to resolve static field 426 (SUPPORTED_ABIS) in Landroid/os/Build;
10-19 18:06:50.517 15837-15837/? D/dalvikvm: VFY: replacing opcode 0x62 at 0x0004
10-19 18:06:50.517 15837-15837/? D/XWalkLib: Pre init xwalk core in com.github.gam2046.platform.united.browser.MainActivity
10-19 18:06:50.517 15837-15837/? D/XWalkLib: Pre init xwalk core in com.github.gam2046.platform.united.browser.MainActivity
10-19 18:06:50.517 15837-15837/? D/XWalkLib: Initialized by XWalkInitializer
10-19 18:06:50.521 15837-15837/? D/XWalkLib: DecompressTask started
10-19 18:06:50.521 15837-15837/? W/ResourceType: No package identifier when getting value for resource number 0x00000000
10-19 18:06:50.577 15837-15837/? D/XWalkLib: Reserve object class org.xwalk.core.XWalkView to com.github.gam2046.platform.united.browser.MainActivity
10-19 18:06:50.577 15837-15837/? D/XWalkLib: Other initialization or download is proceeding
10-19 18:06:50.577 15837-15837/? D/XWalkLib: Other initialization or download is proceeding
10-19 18:06:50.581 15837-15837/? D/XWalkLib: DecompressTask finished, 0
10-19 18:06:50.581 15837-15837/? D/XWalkLib: ActivateTask started
10-19 18:06:50.597 15837-15932/? D/XWalkLib: Attach xwalk core
10-19 18:06:50.597 15837-15932/? D/XWalkLib: [Environment] SDK:19
10-19 18:06:50.601 15837-15932/? D/XWalkLib: [App Version] build:23.53.589.4, api:8, min_api:1
10-19 18:06:50.609 15837-15932/? D/XWalkLib: XWalk core not found
10-19 18:06:50.613 15837-15837/? D/libEGL: loaded /system/lib/egl/libEGL_adreno.so
                                           
                                           [ 10-19 18:06:50.613 15837:15837 D/         ]
                                           HostConnection::get() New Host Connection established 0xb85d73b8, tid 15837
10-19 18:06:50.613 15837-15837/? D/libEGL: loaded /system/lib/egl/libGLESv1_CM_adreno.so
10-19 18:06:50.617 15837-15837/? D/libEGL: loaded /system/lib/egl/libGLESv2_adreno.so
10-19 18:06:50.625 15837-15932/? D/XWalkLib: Crosswalk download mode: true
10-19 18:06:50.629 15837-15932/? D/XWalkLib: [Environment] SDK:19
10-19 18:06:50.629 15837-15932/? D/XWalkLib: [App Version] build:23.53.589.4, api:8, min_api:1
10-19 18:06:50.629 15837-15932/? D/XWalkLib: XWalk core not found
10-19 18:06:50.657 15837-15837/? W/EGL_adreno: eglSurfaceAttrib not implemented
10-19 18:06:50.657 15837-15837/? E/OpenGLRenderer: Getting MAX_TEXTURE_SIZE from GradienCache
10-19 18:06:50.669 15837-15837/? E/OpenGLRenderer: MAX_TEXTURE_SIZE: 16384
10-19 18:06:50.681 15837-15837/? E/OpenGLRenderer: Getting MAX_TEXTURE_SIZE from Caches::initConstraints()
10-19 18:06:50.685 15837-15837/? E/OpenGLRenderer: MAX_TEXTURE_SIZE: 16384
10-19 18:06:50.685 15837-15837/? D/OpenGLRenderer: Enabling debug mode 0
10-19 18:06:50.845 15837-15837/? D/XWalkLib: ActivateTask finished, 2
10-19 18:06:50.849 15837-15837/? D/XWalkLib: Runtime ABI: x86
10-19 18:06:50.849 15837-15837/? D/XWalkLib: Crosswalk APK download URL: http://localhost:8080/download.apk?arch=x86
10-19 18:06:50.849 15837-15837/? D/XWalkLib: HttpDownloadTask started, http://localhost:8080/download.apk?arch=x86
10-19 18:06:50.925 15837-15901/? D/dalvikvm: GC_CONCURRENT freed 169K, 8% free 2969K/3200K, paused 12ms+5ms, total 22ms
10-19 18:06:51.001 15837-15837/? D/XWalkLib: HttpDownloadTask finished, -1
10-19 18:06:51.001 15837-15837/? E/[MainActivity]: onXWalkUpdateFailed

I'm sure that my web service works:

$ curl -I http://localhost:8080/download.apk?arch=x86
HTTP/1.1 200 
Content-Disposition: attachment;filename=app-x86-release.apk
Content-Type: application/octet-stream
Content-Length: 29795980
Date: Thu, 19 Oct 2017 10:14:02 GMT

Am i something wrong?