Create a Custom Android Plugin: java.lang.NullPointerException (no error message) - ionic-framework

Question

I´m developing this Android application to run on device.
I´m using Ionic and Angular to develop the application.
Now I need to create a custom plugin using Plugman. This plugin should allowed user to authentication using IBM APP ID.
I followed the instructions mention here https://github.com/ibm-cloud-security/appid-clientsdk-android
to create my gradle file.
However, when I run ionic cordova run android --verbose --debug
I get this error
What went wrong:
Execution failed for task :app:processDebugManifest.
java.lang.NullPointerException (no error message)
And I have no clue what could be the root cause. This is my first time I develop a custom plugin.
My suspicious relies on the dependency, but I can not tell what part is causing the issue.
Ionic Framework : #ionic/angular 5.0.7
#angular-devkit/build-angular : 0.803.26
#angular-devkit/schematics : 8.3.26
#angular/cli : 8.3.26
#ionic/angular-toolkit : 2.2.0
Cordova:
Cordova CLI : 10.0.0
Cordova Platforms : android 8.1.0
Cordova Plugins : cordova-plugin-ionic-keyboard 2.2.0, cordova-plugin-ionic-webview 4.2.1, (and 7 other plugins)
Utility:
cordova-res (update available: 0.14.0) : 0.10.0
native-run (update available: 1.0.0) : 0.3.0
System:
Android SDK Tools : 26.1.1 (C:\\Android\\sdk)
NodeJS : v14.2.0 (C:\Program Files\\nodejs\\node.exe)
npm : 6.14.4
OS : Windows 10```
LOG=======================================
C:\project_cren\plugin\ci-uix-mobile-master>ionic cordova run android --verbose --debug
ionic:lib Terminal info: { ci: false, shell: 'C:\\WINDOWS\\system32\\cmd.exe', tty: false, windows: true } +0ms
ionic:lib CLI global options: { _: [ 'cordova', 'run', 'android' ], help: null, h: null, verbose: true, quiet: null, interactive: false, color: true, confirm: null, json: null, debug: true, project: null, '--': [] } +4ms
ionic:lib:project Project type from config: #ionic/angular (angular) +0ms
ionic:lib:project Project details: { configPath: 'C:\\project_cren\\plugin\\ci-uix-mobile-master\\ionic.config.json', errors: [], context: 'app', type: 'angular' } +1ms
ionic Context: { binPath: 'C:\\Users\\AMANDODOSSANTOSNETO\\AppData\\Roaming\\npm\\node_modules\\#ionic\\cli\\bin\\ionic', libPath: 'C:\\Users\\AMANDODOSSANTOSNETO\\AppData\\Roaming\\npm\\node_modules\\#ionic\\cli', execPath: 'C:\\project_cren\\plugin\\ci-uix-mobile-master', version: '6.7.0' } +0ms
ionic:lib:integrations:cordova:config Loading Cordova Config (config.xml: 'C:\\project_cren\\plugin\\ci-uix-mobile-master\\config.xml', package.json: 'C:\\project_cren\\plugin\\ci-uix-mobile-master\\package.json') +0ms
ionic:commands:run Native platform devices: [] +0ms
ionic:lib:integrations:cordova:config Loading Cordova Config (config.xml: 'C:\\project_cren\\plugin\\ci-uix-mobile-master\\config.xml', package.json: 'C:\\project_cren\\plugin\\ci-uix-mobile-master\\package.json') +11s
ionic:lib:build build options: {
ionic:lib:build '--': [],
ionic:lib:build engine: 'cordova',
ionic:lib:build platform: 'android',
ionic:lib:build project: 'app',
ionic:lib:build verbose: false,
ionic:lib:build configuration: undefined,
ionic:lib:build sourcemaps: undefined,
ionic:lib:build cordovaAssets: true,
ionic:lib:build watch: undefined,
ionic:lib:build type: 'angular'
ionic:lib:build } +0ms
ionic:lib:hooks Looking for ionic:build:before npm script. +0ms
ionic:lib:build Looking for ionic:build npm script. +154ms
ng:analytics getGlobalAnalytics +0ms
ng:analytics Client Analytics config found: false +47ms
ng:analytics Analytics disabled. Ignoring all analytics. +1ms
ng:analytics getSharedAnalytics +0ms
WARNING in ./src/app/invoice-detail/invoice-detail.component.scss
Module Warning (from ./node_modules/postcss-loader/src/index.js):
Warning
(4:3) start value has mixed support, consider using flex-start instead
# ./src/app/invoice-detail/invoice-detail.component.ts 27:41-83
# ./src/app/app.module.ts
# ./src/main.ts
# multi ./src/main.ts
ionic:lib:hooks Looking for ionic:build:after npm script. +40s
FAILURE: Build failed with an exception.
* What went wrong:
Execution failed for task ':app:processDebugManifest'.
> java.lang.NullPointerException (no error message)
* Try:
Run with --stacktrace option to get the stack trace. Run with --info or --debug option to get more log output. Run with --scan to get full insights.
* Get more help at https://help.gradle.org
BUILD FAILED in 13s
C:\project_cren\plugin\ci-uix-mobile-master\platforms\android\gradlew: Command failed with exit code 1 Error output:
FAILURE: Build failed with an exception.
* What went wrong:
Execution failed for task ':app:processDebugManifest'.
> java.lang.NullPointerException (no error message)
* Try:
Run with --stacktrace option to get the stack trace. Run with --info or --debug option to get more log output. Run with --scan to get full insights.
* Get more help at https://help.gradle.org
BUILD FAILED in 13s
[ERROR] An error occurred while running subprocess cordova.
cordova.cmd build android --debug --verbose exited with exit code 1.
Re-running this command with the --verbose flag may provide more information.
ionic:utils-process onBeforeExit handler: 'process.exit' received +0ms
ionic:utils-process onBeforeExit handler: running 2 functions +1ms
ionic:utils-process error while killing process tree for 17344: Error: Command failed: taskkill /pid 17344 /T /F
ionic:utils-process ERROR: The process "17344" not found.
ionic:utils-process
ionic:utils-process at ChildProcess.exithandler (child_process.js:303:12)
ionic:utils-process at ChildProcess.emit (events.js:315:20)
ionic:utils-process at maybeClose (internal/child_process.js:1051:16)
ionic:utils-process at Process.ChildProcess._handle.onexit (internal/child_process.js:287:5) {
ionic:utils-process killed: false,
ionic:utils-process code: 128,
ionic:utils-process signal: null,
ionic:utils-process cmd: 'taskkill /pid 17344 /T /F'
ionic:utils-process } +472ms
ionic:utils-process onBeforeExit handler: error from function: Error: Command failed: taskkill /pid 17344 /T /F
ionic:utils-process ERROR: The process "17344" not found.
ionic:utils-process
ionic:utils-process at ChildProcess.exithandler (child_process.js:303:12)
ionic:utils-process at ChildProcess.emit (events.js:315:20)
ionic:utils-process at maybeClose (internal/child_process.js:1051:16)
ionic:utils-process at Process.ChildProcess._handle.onexit (internal/child_process.js:287:5) {
ionic:utils-process killed: false,
ionic:utils-process code: 128,
ionic:utils-process signal: null,
ionic:utils-process cmd: 'taskkill /pid 17344 /T /F'
ionic:utils-process } +21ms
ionic:utils-process error while killing process tree for 2628: Error: Command failed: taskkill /pid 2628 /T /F
ionic:utils-process ERROR: The process "2628" not found.
ionic:utils-process
ionic:utils-process at ChildProcess.exithandler (child_process.js:303:12)
ionic:utils-process at ChildProcess.emit (events.js:315:20)
ionic:utils-process at maybeClose (internal/child_process.js:1051:16)
ionic:utils-process at Process.ChildProcess._handle.onexit (internal/child_process.js:287:5) {
ionic:utils-process killed: false,
ionic:utils-process code: 128,
ionic:utils-process signal: null,
ionic:utils-process cmd: 'taskkill /pid 2628 /T /F'
ionic:utils-process } +40ms
ionic:utils-process onBeforeExit handler: error from function: Error: Command failed: taskkill /pid 2628 /T /F
ionic:utils-process ERROR: The process "2628" not found.
ionic:utils-process
ionic:utils-process at ChildProcess.exithandler (child_process.js:303:12)
ionic:utils-process at ChildProcess.emit (events.js:315:20)
ionic:utils-process at maybeClose (internal/child_process.js:1051:16)
ionic:utils-process at Process.ChildProcess._handle.onexit (internal/child_process.js:287:5) {
ionic:utils-process killed: false,
ionic:utils-process code: 128,
ionic:utils-process signal: null,
ionic:utils-process cmd: 'taskkill /pid 2628 /T /F'
ionic:utils-process } +8ms
ionic:utils-process processExit: exiting (exit code: 1) +4ms
GRADLE FILE=====================================================================
android {
//compileSdkVersion 29
//buildToolsVersion "29.0.3"
defaultConfig {
manifestPlaceholders = ['appIdRedirectScheme': android.defaultConfig.applicationId]
}
}
dependencies {
implementation 'com.github.ibm-cloud-security:appid-clientsdk-android:6.+'
}
allprojects {
repositories {
google()
jcenter()
maven { url 'https://jitpack.io' }
}
}
JAVA FILE ==============================================
package ibm.com.ibmappidcordovaplugin;
import org.apache.cordova.CordovaPlugin;
import org.apache.cordova.CallbackContext;
import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;
import com.ibm.cloud.appid.android.api.AppID;
import com.ibm.cloud.appid.android.api.AuthorizationException;
import com.ibm.cloud.appid.android.api.AuthorizationListener;
import com.ibm.cloud.appid.android.api.LoginWidget;
import com.ibm.cloud.appid.android.api.tokens.AccessToken;
import com.ibm.cloud.appid.android.api.tokens.IdentityToken;
import com.ibm.cloud.appid.android.api.tokens.RefreshToken;
/**
* This class echoes a string called from JavaScript.
*/
public class ibmappidcordovaplugin extends CordovaPlugin {
//PluginResult result = null;
private CallbackContext callbackContext = null;
private static final String SHOW_AUTH = "authentication";
LoginWidget loginWidget;
loginWidget = AppID.getInstance().getLoginWidget();
public ibmappidcordovaplugin(){
AppID.getInstance().initialize(getApplicationContext(), "cdb1c3ab-e8cf-49cf-9dff-9dfa4bf2a898", AppID.REGION_US_SOUTH);
}
#Override
public boolean execute(String action, JSONArray args, CallbackContext callbackContext) throws JSONException {
this.callbackContext = callbackContext;
String msg = args.getJSONObject(0).getString("msg");
if (action.equals("authentication")) {
//String message = args.getString(0);
this.coolMethod(msg, callbackContext);
return true;
}
return false;
}
private void coolMethod(String message, CallbackContext callbackContext) {
if (message != null && message.length() > 0) {
auth();
callbackContext.success(create());
} else {
callbackContext.error("Expected one non-empty string argument.");
}
}
private void auth(){
loginWidget.launch(this, new AuthorizationListener() {
#Override
public void onAuthorizationSuccess(final AccessToken accessToken, final IdentityToken identityToken,
RefreshToken refreshToken) {
cordova.getActivity().runOnUiThread(new Runnable() {
#Override
public void run() {
console.log("Name: " + identityToken.getName());
console.log("user: " + accessToken.getScope());
console.log("getIdentities " + identityToken.getIdentities());
console.log("getRaw " + identityToken.getRaw());
for (String name : identityToken.getAudience() ) {
console.log("AUD: " +name);
}
for (String name : identityToken.getAuthenticationMethods() ) {
console.log("AUTH: " +name);
}
try {
JSONObject ob = identityToken.getPayload();
console.log("getPayload " + ob.getString("preferred_username"));
}
catch (Exception e){
console.log("Error: " + e.getMessage());
}
}
});
}
#Override
public void onAuthorizationCanceled() {
}
#Override
public void onAuthorizationFailure (AuthorizationException exception) {
}
});
}
private String create(/*IdentityToken identityToken*/){
String response = "";
try {
JSONObject token = new JSONObject();
String t = "eyJhbGciOiJSUzI1NiIsInR5cCI6IkpXVCIsImtpZCI6ImFwcElkLWNkYjFjM2FiLWU4Y2YtNDljZi05ZGZmLTlkZmE0YmYyYTg5OC0yMDIwLTA5LTI1VDE1OjE5OjI4LjIxNyIsInZlciI6NH0.eyJpc3MiOiJodHRwczovL3VzLXNvdXRoLmFwcGlkLmNsb3VkLmlibS5jb20vb2F1dGgvdjQvY2RiMWMzYWItZThjZi00OWNmLTlkZmYtOWRmYTRiZjJhODk4IiwiYXVkIjpbIjc5NWUzMmVlZWFjMzIzMTM5YmM5ZWU3YmQ2NWEyMTc5YjNhNzc3ZjgiXSwiZXhwIjoxNjAyOTc2ODg0LCJ0ZW5hbnQiOiJjZGIxYzNhYi1lOGNmLTQ5Y2YtOWRmZi05ZGZhNGJmMmE4OTgiLCJpYXQiOjE2MDI5NzMyODQsImVtYWlsIjoiYW1hbmRvc0Bici5pYm0uY29tIiwibmFtZSI6IlZvbHVudGFyaW8gRmVsaXogZGEgVmlkYSIsInN1YiI6ImMyMjQ3ZWU3LTc3ZDEtNDFhMy04NjQ3LWRmNTNhMWMyMWJiMiIsImVtYWlsX3ZlcmlmaWVkIjp0cnVlLCJwcmVmZXJyZWRfdXNlcm5hbWUiOiIxMjM0NTY3OCIsImdpdmVuX25hbWUiOiJWb2x1bnRhcmlvIiwiZmFtaWx5X25hbWUiOiJGZWxpeiBkYSBWaWRhIiwiaWRlbnRpdGllcyI6W3sicHJvdmlkZXIiOiJjbG91ZF9kaXJlY3RvcnkiLCJpZCI6IjU0NmU5NTk5LWJjMGItNDIxNi04YzljLTQ2N2RjZWQ5NjQ4NCJ9XSwiYW1yIjpbImNsb3VkX2RpcmVjdG9yeSJdfQ.C4_2mj3fx3IwfqH4_O8CR4NtSNpgR7WTbjOz9j1XvrAZS9uiTswMyCn9q8N8pIh6BuP2RTmBhAtnkjAYt0rkHOtEHutf9J79GkpN33-H5P-5k9pqopUuawyFZlfEuH3m76PVnH2XkDUZ1EOTRKrtuHIyYS74tGOYgF8r3hBwjSbFZPTchkNAQmqn5FTgJ6LzUa3xBWt3C1nkvMw3nKrorAUtrsCZXD9PGJKlqJhpZXH9renSRa4KDDwswHzhLGiIghgAmvVoNwOsUWrWbQF88EGDKAkyQRCnTRo2lqdANtYlIwsVitGc9zkje6wDOhjjfZ6g24sj9Id-kK7Sw813aQ";
token.put("name", "Fulando da Silva"/*identityToken.getName()*/);
token.put("email", "fulano#test.com"/*identityToken.getEmail()*/);
token.put("token", t/*identityToken.getRaw()*/);
response = token.toString();
} catch (JSONException e) {
throw new RuntimeException(e);
}
return response;
}
}