Android Google plus , Login successfully on google account after that , facing Null pointer exception in following code , for getting google plus friend list.
GoogleTokenResponse tokenResponse = new GoogleAuthorizationCodeTokenRequest(
httpTransport, jsonFactory, clientId, clientSecret, code, redirectUrl).execute();
My Entire code are following :
public void setUp() throws IOException {
HttpTransport httpTransport = new NetHttpTransport();
JacksonFactory jsonFactory = new JacksonFactory();
// Go to the Google API Console, open your application's
// credentials page, and copy the client ID and client secret.
// Then paste them into the following code.
String clientId = "Client_ID_for_Web_application";
String clientSecret = "Client_secredt_for_Web_application";
// Or your redirect URL for web based applications.
String redirectUrl = "urn:ietf:wg:oauth:2.0:oob";
String scope = "https://www.googleapis.com/auth/contacts.readonly";
// Step 1: Authorize -->
String authorizationUrl = new GoogleBrowserClientRequestUrl(clientId,
redirectUrl,
Arrays.asList(scope))
.build();
// Point or redirect your user to the authorizationUrl.
System.out.println("Go to the following link in your browser:");
System.out.println(authorizationUrl);
// Read the authorization code from the standard input stream.
BufferedReader in = new BufferedReader(new InputStreamReader(System.in));
System.out.println("What is the authorization code?");
String code = in.readLine();
// End of Step 1 <--
// Step 2: Exchange -->
GoogleTokenResponse tokenResponse = new GoogleAuthorizationCodeTokenRequest(
httpTransport, jsonFactory, clientId, clientSecret, code, redirectUrl).execute();
// End of Step 2 <--
GoogleCredential credential = new GoogleCredential.Builder()
.setTransport(httpTransport)
.setJsonFactory(jsonFactory)
.setClientSecrets(clientId, clientSecret)
.build()
.setFromTokenResponse(tokenResponse);
People peopleService = new People.Builder(httpTransport, jsonFactory, credential)
.build();
Log.e("peopel:", peopleService + "");
ListConnectionsResponse response = peopleService.people().connections().list("people/me").execute();
List<Person> connections = response.getConnections();
Log.e("peope2:", connections + "");
Person profile = peopleService.people().get("people/me").execute();
Log.e("peope3:", profile + "");
}
Update
Error log are following :
FATAL EXCEPTION: main
java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.tops.mygapp/com.example.tops.mygapp.MainActivity}: java.lang.NullPointerException
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2180)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2230)
at android.app.ActivityThread.access$600(ActivityThread.java:141)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1234)
at android.os.Handler.dispatchMessage(Handler.java:99)
at android.os.Looper.loop(Looper.java:137)
at android.app.ActivityThread.main(ActivityThread.java:5041)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:511)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:793)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:560)
at dalvik.system.NativeStart.main(Native Method)
Caused by: java.lang.NullPointerException
at com.google.api.client.repackaged.com.google.common.base.Preconditions.checkNotNull(Preconditions.java:213)
at com.google.api.client.util.Preconditions.checkNotNull(Preconditions.java:127)
at com.google.api.client.auth.oauth2.AuthorizationCodeTokenRequest.setCode(AuthorizationCodeTokenRequest.java:147)
at com.google.api.client.googleapis.auth.oauth2.GoogleAuthorizationCodeTokenRequest.setCode(GoogleAuthorizationCodeTokenRequest.java:147)
at com.google.api.client.googleapis.auth.oauth2.GoogleAuthorizationCodeTokenRequest.setCode(GoogleAuthorizationCodeTokenRequest.java:79)
at com.google.api.client.auth.oauth2.AuthorizationCodeTokenRequest.<init>(AuthorizationCodeTokenRequest.java:103)
at com.google.api.client.googleapis.auth.oauth2.GoogleAuthorizationCodeTokenRequest.<init>(GoogleAuthorizationCodeTokenRequest.java:111)
at com.google.api.client.googleapis.auth.oauth2.GoogleAuthorizationCodeTokenRequest.<init>(GoogleAuthorizationCodeTokenRequest.java:92)
at com.example.tops.mygapp.MainActivity.setUp(MainActivity.java:272)
at com.example.tops.mygapp.MainActivity.onCreate(MainActivity.java:77)
at android.app.Activity.performCreate(Activity.java:5104)
at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1080)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2144)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2230)
at android.app.ActivityThread.access$600(ActivityThread.java:141)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1234)
at android.os.Handler.dispatchMessage(Handler.java:99)
at android.os.Looper.loop(Looper.java:137)
at android.app.ActivityThread.main(ActivityThread.java:5041)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:511)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:793)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:560)
at dalvik.system.NativeStart.main(Native Method)
Update 2
Exactly i am got null at
BufferedReader in = new BufferedReader(new InputStreamReader(System.in));
System.out.println("What is the authorization code?");
String code = in.readLine();
i am getting null value of code.
