I am currently working on a project to develop an android app using Ionic/Cordova. In this app we need to automatically connect to a wifi network using EAP TTLS and to do so we are developing a cordova plugin.
As many tutorials suggest, we started the development by creating an Android app that did exactly what we wanted. Next, we turned it into a plugin. Up to that point everything was great, we achieved the desired functionality and added the plugin to the Ionic project without errors.
Now, when we execute the command ionic build we receive many errors related to the imports used in the plugin, for example:
import android.net.wifi.WifiConfiguration;
import android.net.wifi.WifiManager;
import android.net.wifi.WifiConfiguration;
import android.net.wifi.WifiEnterpriseConfig;
import android.net.wifi.WifiManager;
import android.net.ConnectivityManager;
import android.net.NetworkInfo;
From all the research done before the development we understood that any app that you could be develop directly for Android could be turn into a plugin. Therefore, I believe that we are missing an important step in the process or taking the wrong approach to the development.
May anyone help me solve this or give me pointers to the proper way to build an Ionic/Cordova plugin?
Here is a copy of the error log:
ConnectivityChangeReceiver.java:19: error: cannot find symbol
import com.wbinnova.adsfinetworkplugin.R;
^
symbol: class R
location: package com.wbinnova.adsfinetworkplugin
ConnectionActivity.java:9: error: package android.support.v7.app does not exist
import android.support.v7.app.ActionBarActivity;
^
ConnectionActivity.java:17: error: cannot find symbol
public class ConnectionActivity extends ActionBarActivity {
^
symbol: class ActionBarActivity
ScanActivity.java:13: error: package android.support.v7.app does not exist
import android.support.v7.app.ActionBarActivity;
^
ScanActivity.java:21: error: cannot find symbol
public class ScanActivity extends ActionBarActivity {
^
symbol: class ActionBarActivity
ConnectivityChangeReceiver.java:93: error: package R does not exist
Notification notification = new Notification(R.mipmap.ic_launcher, "Red Ads-Fi disponible", System.currentTimeMillis());
^
ConnectionActivity.java:24: error: cannot find symbol
super.onCreate(savedInstanceState);
^
symbol: variable super
location: class ConnectionActivity
ConnectionActivity.java:27: error: cannot find symbol
wifiManag = (WifiManager) getSystemService(Context.WIFI_SERVICE);
^
symbol: method getSystemService(String)
location: class ConnectionActivity
ConnectionActivity.java:53: error: no suitable constructor found for Builder(ConnectionActivity)
AlertDialog.Builder builder = new AlertDialog.Builder(ConnectionActivity.this);
^
constructor Builder.Builder(Context,int) is not applicable
(actual and formal argument lists differ in length)
constructor Builder.Builder(Context) is not applicable
(actual argument ConnectionActivity cannot be converted to Context by method invocation conversion)
ConnectionActivity.java:22: error: method does not override or implement a method from a supertype
@Override
^
ConnectionActivity.java:62: error: package R does not exist
getMenuInflater().inflate(R.menu.menu_main, menu);
^
ConnectionActivity.java:62: error: cannot find symbol
getMenuInflater().inflate(R.menu.menu_main, menu);
^
symbol: method getMenuInflater()
location: class ConnectionActivity
ConnectionActivity.java:59: error: method does not override or implement a method from a supertype
@Override
^
ConnectionActivity.java:71: error: package R does not exist
if (id == R.id.action_settings) {
^
ConnectionActivity.java:75: error: cannot find symbol
return super.onOptionsItemSelected(item);
^
symbol: variable super
location: class ConnectionActivity
ConnectionActivity.java:66: error: method does not override or implement a method from a supertype
@Override
^
ScanActivity.java:35: error: cannot find symbol
super.onCreate(savedInstanceState);
^
symbol: variable super
location: class ScanActivity
ScanActivity.java:36: error: package R does not exist
setContentView(R.layout.activity_main);
^
ScanActivity.java:39: error: cannot find symbol
mainWifi = (WifiManager) getSystemService(Context.WIFI_SERVICE);
^
symbol: method getSystemService(String)
location: class ScanActivity
ScanActivity.java:33: error: method does not override or implement a method from a supertype
@Override
^
ScanActivity.java:54: error: package R does not exist
getMenuInflater().inflate(R.menu.menu_main, menu);
^
ScanActivity.java:54: error: cannot find symbol
getMenuInflater().inflate(R.menu.menu_main, menu);
^
symbol: method getMenuInflater()
location: class ScanActivity
ScanActivity.java:51: error: method does not override or implement a method from a supertype
@Override
^
ScanActivity.java:63: error: package R does not exist
if (id == R.id.action_settings) {
^
ScanActivity.java:67: error: cannot find symbol
return super.onOptionsItemSelected(item);
^
symbol: variable super
location: class ScanActivity
ScanActivity.java:58: error: method does not override or implement a method from a supertype
@Override
^
ScanActivity.java:74: error: cannot find symbol
mainWifi = (WifiManager) getSystemService(Context.WIFI_SERVICE);
^
symbol: method getSystemService(String)
location: class ScanActivity
ScanActivity.java:99: error: cannot find symbol
WifiManager wifiManag = (WifiManager) getSystemService(Context.WIFI_SERVICE);
^
symbol: method getSystemService(String)
location: class ScanActivity
ScanActivity.java:153: error: cannot find symbol
Intent intent2 = new Intent(ScanActivity.this, ConectionActivity.class);
^
symbol: class ConectionActivity
location: class ScanActivity
ScanActivity.java:154: error: cannot find symbol
startActivity(intent2);
^
symbol: method startActivity(Intent)
location: class ScanActivity
It seems you're creating a Java action, you need to create a simple Java class with some functions that will allow you transform that Java class into a plugin for cordova
Here you can find how to create a simple echo plugin:
https://cordova.apache.org/docs/en/2.5.0/guide/plugin-development/android/
Pay attention that it extends CordovaPlugIn and the main function is execute with 3 arguments