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我目前正試圖將Google的LVL應用到我的壁紙中，但似乎遇到了一個我並不熟悉的異常問題。我發現這個問題對我很有幫助，LVL licensing in a Live Wallpaper?。其中一個建議是將代碼放置在引擎中，並且我選擇將它放在上面的類中。代碼似乎編譯正常，但在運行時，我得到一個異常，顯然是我的公鑰。壁紙中的許可證驗證庫
FATAL EXCEPTION: main
java.lang.RuntimeException: Unable to create service <my package>.MyWallpaper: java.lang.IllegalArgumentException: java.security.spec.InvalidKeySpecException: java.io.IOException: corrupted stream - out of bounds length found
at android.app.ActivityThread.handleCreateService(ActivityThread.java:2076)
at android.app.ActivityThread.access$2500(ActivityThread.java:123)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:993)
at android.os.Handler.dispatchMessage(Handler.java:99)
at android.os.Looper.loop(Looper.java:130)
at android.app.ActivityThread.main(ActivityThread.java:3835)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:507)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:847)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:605)
at dalvik.system.NativeStart.main(Native Method)
Caused by: java.lang.IllegalArgumentException: java.security.spec.InvalidKeySpecException: java.io.IOException: corrupted stream - out of bounds length found
at com.android.vending.licensing.LicenseChecker.generatePublicKey(LicenseChecker.java:121)
at com.android.vending.licensing.LicenseChecker.<init>(LicenseChecker.java:92)
at com.metastable.epicvis.vis1.ScopeVisualizer.onCreate(ScopeVisualizer.java:41)
at android.app.ActivityThread.handleCreateService(ActivityThread.java:2066)
... 10 more
Caused by: java.security.spec.InvalidKeySpecException: java.io.IOException: corrupted stream - out of bounds length found
at org.bouncycastle.jce.provider.JDKKeyFactory.engineGeneratePublic(JDKKeyFactory.java:92)
at org.bouncycastle.jce.provider.JDKKeyFactory$RSA.engineGeneratePublic(JDKKeyFactory.java:396)
at java.security.KeyFactory.generatePublic(KeyFactory.java:177)
at com.android.vending.licensing.LicenseChecker.generatePublicKey(LicenseChecker.java:112)
... 13 more
這裏是我使用的代碼：
public class MyWallpaper extends WallpaperService implements LicenseCheckerCallback {
private LicenseChecker mChecker;
private static final String BASE64_PUBLIC_KEY = "My public key from google";
private byte[] salt = new byte[] {<20 random int>};
private String deviceId;
private AESObfuscator aes;
@Override
public void onCreate() {
super.onCreate();
deviceId = Secure.getString(getContentResolver(), Secure.ANDROID_ID);
aes = new AESObfuscator(salt, getPackageName(), deviceId);
mChecker = new LicenseChecker(this, new ServerManagedPolicy(this, aes), BASE64_PUBLIC_KEY);
mChecker.checkAccess(this);
}
@Override
public void onDestroy() {
super.onDestroy();
mChecker.onDestroy();
}
@Override
public Engine onCreateEngine() {
return new VisualizerEngine();
}
class MyEngine extends Engine implements SharedPreferences.OnSharedPreferenceChangeListener {
<Unrelevant code removed>
}
@Override
public void allow() {
Toast.makeText(this, "Allowed", Toast.LENGTH_SHORT);
}
@Override
public void dontAllow() {
Toast.makeText(this, "Not Allowed", Toast.LENGTH_SHORT);
}
@Override
public void applicationError(ApplicationErrorCode errorCode) {
// TODO Auto-generated method stub
}
}
有一定的辦法，我要格式化我的公鑰或者是完全不同的東西？異常來自：mChecker = new LicenseChecker（this，new ServerManagedPolicy（this，aes），BASE64_PUBLIC_KEY）;
任何意見將不勝感激。