我有一个应用程序使用 Google Liense Protection LVL 来避免在许可证失败时访问我已设置禁用 buttonNewDoc 如果许可证检查成功我必须重新启用它。
不幸的是，有些东西不起作用。
这是我的代码：
public class Home extends Activity {
private static final String BASE64_PUBLIC_KEY = "mykeywithoutspaces";
// Generate your own 20 random bytes, and put them here.
private static final byte[] SALT = new byte[] {
-00, 00, 30, -2, -58, -57, 00, -64, 51, 32, -95, -45, 13, -6, -36, -15, -11, 32, -64,
89
};
private TextView mStatusText;
private Button mCheckLicenseButton;
private LicenseCheckerCallback mLicenseCheckerCallback;
private LicenseChecker mChecker;
// A handler on the UI thread.
private Handler mHandler;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
requestWindowFeature(Window.FEATURE_INDETERMINATE_PROGRESS);
setContentView(R.layout.main);
mStatusText = (TextView) findViewById(R.id.status_text);
buttonNewDoc = (ImageButton) findViewById(R.id.btNewDoc);
buttonNewDoc.setOnClickListener(mNewDoc);
mCheckLicenseButton = (Button) findViewById(R.id.check_license_button);
mCheckLicenseButton.setOnClickListener(new View.OnClickListener() {
public void onClick(View view) {
doCheck();
}
});
mHandler = new Handler();
// Try to use more data here. ANDROID_ID is a single point of attack.
String deviceId = Secure.getString(getContentResolver(), Secure.ANDROID_ID);
// Library calls this when it's done.
mLicenseCheckerCallback = new MyLicenseCheckerCallback();
// Construct the LicenseChecker with a policy.
mChecker = new LicenseChecker(
this, new ServerManagedPolicy(this,
new AESObfuscator(SALT, getPackageName(), deviceId)),
BASE64_PUBLIC_KEY);
doCheck();
}
protected Dialog onCreateDialog(int id) {
final boolean bRetry = id == 1;
return new AlertDialog.Builder(this)
.setTitle(R.string.unlicensed_dialog_title)
.setMessage(bRetry ? R.string.unlicensed_dialog_retry_body : R.string.unlicensed_dialog_body)
.setPositiveButton(bRetry ? R.string.retry_button : R.string.buy_button, new DialogInterface.OnClickListener() {
boolean mRetry = bRetry;
public void onClick(DialogInterface dialog, int which) {
if ( mRetry ) {
doCheck();
} else {
Intent marketIntent = new Intent(Intent.ACTION_VIEW, Uri.parse(
"http://market.android.com/details?id=" + getPackageName()));
startActivity(marketIntent);
}
}
})
.setNegativeButton(R.string.quit_button, new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int which) {
finish();
}
}).create();
}
private void doCheck() {
buttonNewDoc.setEnabled(false);
mCheckLicenseButton.setEnabled(false);
setProgressBarIndeterminateVisibility(true);
mStatusText.setText(R.string.checking_license);
mChecker.checkAccess(mLicenseCheckerCallback);
}
private void displayResult(final String result) {
mHandler.post(new Runnable() {
public void run() {
mStatusText.setText(result);
setProgressBarIndeterminateVisibility(false);
mCheckLicenseButton.setEnabled(true);
}
});
}
private void displayDialog(final boolean showRetry) {
mHandler.post(new Runnable() {
public void run() {
setProgressBarIndeterminateVisibility(false);
showDialog(showRetry ? 1 : 0);
mCheckLicenseButton.setEnabled(true);
}
});
}
private class MyLicenseCheckerCallback implements LicenseCheckerCallback {
public void allow(int policyReason) {
if (isFinishing()) {
// Don't update UI if Activity is finishing.
return;
}
// Should allow user access.
displayResult(getString(R.string.allow));
buttonNewDoc.setEnabled(false);
}
public void dontAllow(int policyReason) {
if (isFinishing()) {
// Don't update UI if Activity is finishing.
return;
}
displayResult(getString(R.string.dont_allow));
// Should not allow access. In most cases, the app should assume
// the user has access unless it encounters this. If it does,
// the app should inform the user of their unlicensed ways
// and then either shut down the app or limit the user to a
// restricted set of features.
// In this example, we show a dialog that takes the user to Market.
// If the reason for the lack of license is that the service is
// unavailable or there is another problem, we display a
// retry button on the dialog and a different message.
displayDialog(policyReason == Policy.RETRY);
}
public void applicationError(int errorCode) {
if (isFinishing()) {
// Don't update UI if Activity is finishing.
return;
}
String result = String.format(getString(R.string.application_error), errorCode);
displayResult(result);
}
}
@Override
protected void onDestroy() {
super.onDestroy();
mChecker.onDestroy();
}
}
这是错误：
10-03 14:23:01.469: E/AndroidRuntime(3457): FATAL EXCEPTION: background thread
10-03 14:23:01.469: E/AndroidRuntime(3457): android.view.ViewRoot$CalledFromWrongThreadException: Only the original thread that created a view hierarchy can touch its views.
10-03 14:23:01.469: E/AndroidRuntime(3457): at android.view.ViewRoot.checkThread(ViewRoot.java:3020)
10-03 14:23:01.469: E/AndroidRuntime(3457): at android.view.ViewRoot.invalidateChild(ViewRoot.java:647)
10-03 14:23:01.469: E/AndroidRuntime(3457): at android.view.ViewRoot.invalidateChildInParent(ViewRoot.java:673)
10-03 14:23:01.469: E/AndroidRuntime(3457): at android.view.ViewGroup.invalidateChild(ViewGroup.java:2511)
10-03 14:23:01.469: E/AndroidRuntime(3457): at android.view.View.invalidate(View.java:5279)
10-03 14:23:01.469: E/AndroidRuntime(3457): at android.view.View.setEnabled(View.java:3151)
10-03 14:23:01.469: E/AndroidRuntime(3457): at com.myapp.Home$MyLicenseCheckerCallback.allow(Home.java:143)