My app use account manager to share auth token and it works fine in early 4.0. But when i try the app in my Nexus S (4.0.3) , NPE occurs every time i call the getAuthToken method. Stack trace as follows:
E/AndroidRuntime( 5282): java.lang.RuntimeException: Unable to start activity ComponentInfo{android/android.accounts.Gra
ntCredentialsPermissionActivity}: java.lang.NullPointerException
E/AndroidRuntime( 5282): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1956)
E/AndroidRuntime( 5282): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1981)
E/AndroidRuntime( 5282): at android.app.ActivityThread.access$600(ActivityThread.java:123)
E/AndroidRuntime( 5282): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1147)
E/AndroidRuntime( 5282): at android.os.Handler.dispatchMessage(Handler.java:99)
E/AndroidRuntime( 5282): at android.os.Looper.loop(Looper.java:137)
E/AndroidRuntime( 5282): at android.app.ActivityThread.main(ActivityThread.java:4424)
E/AndroidRuntime( 5282): at java.lang.reflect.Method.invokeNative(Native Method)
E/AndroidRuntime( 5282): at java.lang.reflect.Method.invoke(Method.java:511)
E/AndroidRuntime( 5282): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:784)
E/AndroidRuntime( 5282): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:551)
E/AndroidRuntime( 5282): at dalvik.system.NativeStart.main(Native Method)
E/AndroidRuntime( 5282): Caused by: java.lang.NullPointerException
E/AndroidRuntime( 5282): at android.accounts.GrantCredentialsPermissionActivity.onCreate(GrantCredentialsPermissi
onActivity.java:84)
E/AndroidRuntime( 5282): at android.app.Activity.performCreate(Activity.java:4465)
E/AndroidRuntime( 5282): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1049)
E/AndroidRuntime( 5282): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1920)
E/AndroidRuntime( 5282): ... 11 more
W/ActivityManager( 151): Force finishing activity android/.accounts.GrantCredentialsPermissionActivity
But, when i get google's AuthToken, it works fine. My question is : Are there something wrong in my code and how can i fix it? Or it is a bug in android and it will be fixed later?
This issue was killing me for a while, but this worked for me on ICS 4.0.3:
AccountManager am = AccountManager.get(context);
Account[] accounts = am.getAccountsByType("com.google");
Account selected = accounts[0];
am.getAuthToken(account, "ah", false, callback, null);
Where 'callback' looks some thing like this:
new AccountManagerCallback<Bundle>() {
@Override
public void run(AccountManagerFuture<Bundle> future) {
Bundle bundle;
try {
bundle = future.getResult();
Intent intent = (Intent)bundle.get(AccountManager.KEY_INTENT);
if(intent != null){
startActivity(intent);
//In the activity that runs this I check for a flag in the onResume, which tells me that we returned from this activity
}
else{
//we have the token!
}
} catch (OperationCanceledException e) {
} catch (AuthenticatorException e) {
} catch (IOException e) {
}
}
}
This method doesn't return the GrantCredentialsPermissionActivity, it returns a different one, something like 'LoginActivity'.
Hope this helps
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