应用程序不会下载扩展文件（找不到资源）

我创建了一个使用Expansion文件的Android应用程序 . 当Expansion文件与apk一起下载时，它运行良好 . 但是当它没有，并且应用程序需要下载Expansion itselg时，它会变得复杂 .

DownloadService.java - 我在此处从开发者控制台复制了* Base64编码的RSA公钥，并将完全随机的字节插入到SALT中（我自己制作了它） .

public class DownloadService extends DownloaderService {

// TODO You must use the public key belonging to your publisher account
public static final String BASE64_PUBLIC_KEY = "MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAl0rC8XLNwlpDn0Ezc7LBF08eds9VLvbT6Bbl3B7h6uSqa703HXEv44LLBLAmBz2QM2iwzrf3WH7Tjp80II9rQxaVsUIukBHtnE5r9CBHn/pQl4OkZplmI3/Fvl2WPWyvXqVi2BungmW29FBqIWVQED0UepT1eXVr8X8sPAhcDwfI2WERIWHzm32oiz/a2dpMBs1DA/ERO1kWgtDKJuwjik9tHTeo2xfRBC+ytZQ5jqKFlmLqlDXpcDCUXVXhV2idtujV9cPD1PdEgElPTbqro7LQdrsMm4hn0olPK2Iy6hhdzO/Tll/viH03GtUkMOjpFA+OAVsA+b+oM1MfHiHTbwIDAQAB";
// TODO You should also modify this salt
public static final byte[] SALT = new byte[] { 7, 23, -47, -8, 24, 72,
        -28, -83, 47, 1, -12, -8, 28, 3, -101, -109, -20, 47, -2, 92
};

@Override
public String getPublicKey() {
    return BASE64_PUBLIC_KEY;
}

@Override
public String getAlarmReceiverClassName() {
    return BroadCastReceiver.class.getName();
}

@Override
public byte[] getSALT() {
    return SALT;
}

}

BroadcastReceiver.java

public class BroadCastReceiver extends BroadcastReceiver {

@Override
public void onReceive(Context context, Intent intent) {
    try {
        DownloaderClientMarshaller.startDownloadServiceIfRequired(context, intent, DownloadService.class);
    } catch (PackageManager.NameNotFoundException e) {
        e.printStackTrace();
    }
}

}

SplashActity.java - 以应用程序开头的第一个活动，这是我实施下载过程的地方

public class SplashActivity extends Activity implements IDownloaderClient {

int SPLASH_DURATION = 2000;
TextView title1, title2, loading;

// APK EXPANSIONS
private IStub mDownloaderClientStub;
private IDownloaderService mRemoteService;
private ProgressDialog mProgressDialog;
private static final String LOG_TAG = "LOG";

// The shared path to all app expansion files
private final static String EXP_PATH = "/Android/obb/";

private static class XAPKFile {
    public final boolean mIsMain;
    public final int mFileVersion;
    public final long mFileSize;

    XAPKFile(boolean isMain, int fileVersion, long fileSize) {
        mIsMain = isMain;
        mFileVersion = fileVersion;
        mFileSize = fileSize;
    }
}

private static final XAPKFile[] xAPKS = {
        new XAPKFile(
                true, // true signifies a main file
                2, // the version of the APK that the file was uploaded against
                52948873L // the length of the file in bytes
        )
};

boolean expansionFilesDelivered() {
    for (XAPKFile xf : xAPKS) {
        String fileName = Helpers.getExpansionAPKFileName(this, xf.mIsMain, xf.mFileVersion);
        // Log.v(LOG_TAG, "XAPKFile name : " + fileName);
        if (!Helpers.doesFileExist(this, fileName, xf.mFileSize, false)) {
            Log.e(LOG_TAG, "ExpansionAPKFile doesn't exist or has a wrong size (" + fileName + ").");
            return false;
        }
    }
    return true;
}

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_splash);

    // Views
    title1 = (TextView) findViewById(R.id.textView2);
    title2 = (TextView) findViewById(R.id.textView3);
    loading = (TextView) findViewById(R.id.textView);

    // Font
    Typeface tf = Typeface.createFromAsset(getApplicationContext().getAssets(), "aressence.ttf");
    title1.setTypeface(tf);
    title2.setTypeface(tf);
    loading.setTypeface(tf);

    // Check if expansion files are available before going any further
    if (!expansionFilesDelivered()) {

        try {
            Intent launchIntent = this.getIntent();

            // Build an Intent to start this activity from the Notification
            Intent notifierIntent = new Intent(SplashActivity.this, SplashActivity.this.getClass());
            notifierIntent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK | Intent.FLAG_ACTIVITY_CLEAR_TOP);
            notifierIntent.setAction(launchIntent.getAction());

            if (launchIntent.getCategories() != null) {
                for (String category : launchIntent.getCategories()) {
                    notifierIntent.addCategory(category);
                }
            }

            PendingIntent pendingIntent = PendingIntent.getActivity(this, 0, notifierIntent, PendingIntent.FLAG_UPDATE_CURRENT);

            // Start the download service (if required)
            Log.v(LOG_TAG, "Start the download service");
            int startResult = DownloaderClientMarshaller.startDownloadServiceIfRequired(this, pendingIntent, DownloadService.class);

            // If download has started, initialize activity to show progress
            if (startResult != DownloaderClientMarshaller.NO_DOWNLOAD_REQUIRED) {
                Log.v(LOG_TAG, "initialize activity to show progress");
                // Instantiate a member instance of IStub
                mDownloaderClientStub = DownloaderClientMarshaller.CreateStub(this, DownloadService.class);
                // Shows download progress
                mProgressDialog = new ProgressDialog(SplashActivity.this);
                mProgressDialog.setProgressStyle(ProgressDialog.STYLE_HORIZONTAL);
                mProgressDialog.setMessage(getResources().getString(R.string.state_downloading));
                mProgressDialog.setCancelable(false);
                mProgressDialog.show();
                return;
            }
            // If the download wasn't necessary, fall through to start the app
            else {
                Log.v(LOG_TAG, "No download required");
            }
        }
        catch (PackageManager.NameNotFoundException e) {
            Log.e(LOG_TAG, "Cannot find own package! MAYDAY!");
            e.printStackTrace();
        }
        catch (Exception e) {
            Log.e(LOG_TAG, e.getMessage());
            e.printStackTrace();
        }

    }
    else
    {
        // 2sec handler
        new Handler().postDelayed(new Runnable() {
            @Override
            public void run() {
                startActivity(new Intent(SplashActivity.this, MainActivity.class));
                finish();
            }
        }, SPLASH_DURATION);
    }

    // Set by <content src="index.html" /> in config.xml
    //super.loadUrl(Config.getStartUrl());
    //super.loadUrl("file:///android_asset/www/index.html")

}

@Override
protected void onStart() {
    if (null != mDownloaderClientStub) {
        mDownloaderClientStub.connect(this);
    }
    super.onStart();
}

@Override
protected void onResume() {
    if (null != mDownloaderClientStub) {
        mDownloaderClientStub.connect(this);
    }
    super.onResume();
}

@Override
protected void onStop() {
    if (null != mDownloaderClientStub) {
        mDownloaderClientStub.disconnect(this);
    }
    super.onStop();
}

@Override
public void onServiceConnected(Messenger m) {
    mRemoteService = DownloaderServiceMarshaller.CreateProxy(m);
    mRemoteService.onClientUpdated(mDownloaderClientStub.getMessenger());
}

@Override
public void onDownloadStateChanged(int newState) {
    Log.v(LOG_TAG, "DownloadStateChanged : " + getString(Helpers.getDownloaderStringResourceIDFromState(newState)));

    switch (newState) {
        case STATE_DOWNLOADING:
            Log.v(LOG_TAG, "Downloading...");
            break;
        case STATE_COMPLETED: // The download was finished
            // validateXAPKZipFiles();
            mProgressDialog.setMessage("");
            // dismiss progress dialog
            mProgressDialog.dismiss();
            // Load url
            //super.loadUrl(Config.getStartUrl());
            break;
        case STATE_FAILED_UNLICENSED:
        case STATE_FAILED_FETCHING_URL:
        case STATE_FAILED_SDCARD_FULL:
        case STATE_FAILED_CANCELED:
        case STATE_FAILED:
            AlertDialog.Builder alert = new AlertDialog.Builder(this);
            alert.setTitle("error");
            alert.setMessage("download failed");
            alert.setNeutralButton("close", null);
            alert.show();
            break;
    }
}

@Override
public void onDownloadProgress(DownloadProgressInfo progress) {
    long percents = progress.mOverallProgress * 100 / progress.mOverallTotal;
    Log.v(LOG_TAG, "DownloadProgress:"+Long.toString(percents) + "%");
    mProgressDialog.setProgress((int) percents);
}
}

在应用程序尝试下载扩展文件后，我发现这与LogCat中的许可有关 .

08-19 23:39:16.641  25920-25920/com.mhacinapps.sleepwithnaturesounds I/LicenseChecker﹕ Binding to licensing service.
08-19 23:39:16.758  25920-25920/com.mhacinapps.sleepwithnaturesounds I/LicenseChecker﹕ Calling checkLicense on service for com.mhacinapps.sleepwithnaturesounds
08-19 23:39:16.758  25920-25920/com.mhacinapps.sleepwithnaturesounds I/LicenseChecker﹕ Start monitoring timeout.
08-19 23:39:26.766  25920-25939/com.mhacinapps.sleepwithnaturesounds I/LicenseChecker﹕ Check timed out.

当设备上没有扩展文件时，下载栏为0/100几秒钟，然后它表示没有找到资源而下载失败 .

有人可以帮助我，让我知道我哪里出错了吗？

谢谢！