com.szanata.cordova.phonestatechangelistener.PhoneStateChangeListener.java Source code

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Here is the source code for com.szanata.cordova.phonestatechangelistener.PhoneStateChangeListener.java

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/**
 *  PhoneStateChangeListener cordova plugin (Android)
 * 
 *    @author Stfano Stypulkowski Zanata
 *    @see http://szanata.com
 *  @reference https://github.com/madeinstefano/PhoneStateChangeListener
 *    @license MIT <http://szanata.com/MIT.txt>
 *    @license GNU <http://szanata.com/GNU.txt>
 *  
 *    Based upon PhoneListener by authored by Tommy-Carlos Williams <https://github.com/devgeeks>
 * 
 */
package com.szanata.cordova.phonestatechangelistener;

import org.apache.cordova.CallbackContext;
import org.apache.cordova.CordovaPlugin;
import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;

import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.content.IntentFilter;
import android.telephony.TelephonyManager;

/**
 * 
 *
 */
public class PhoneStateChangeListener extends CordovaPlugin {

    private static final String TAG = "PhoneStateChangeListener";
    private final String NONE = "NONE";
    private Context context;
    private BroadcastReceiver receiver = null;

    /**
     * Expecting no parameters from javascript
     * Expecting only success callback from javascript
     */
    @Override
    public boolean execute(final String action, final JSONArray args, final CallbackContext callbackContext)
            throws JSONException {

        this.context = cordova.getActivity().getApplicationContext();

        if ("start".equals(action)) {
            startPhoneListener(callbackContext);
            return true;

        } else if ("stop".equals(action)) {
            removePhoneListener(callbackContext);
            this.callbackContext = null;
            return true;
        }

        return false;
    }

    /**
     * creates a new BroadcastReceiver to listen whether the Telephony State changes
     */
    public void startPhoneListener(final CallbackContext callbackContext) {

        if (this.receiver == null) {
            this.receiver = new BroadcastReceiver() {

                @Override
                public void onReceive(final Context context, final Intent intent) {

                    if (intent != null && intent.getAction().equals(TelephonyManager.ACTION_PHONE_STATE_CHANGED)) {
                        String state = intent.hasExtra(TelephonyManager.EXTRA_STATE)
                                ? intent.getStringExtra(TelephonyManager.EXTRA_STATE)
                                : NONE;
                        String number = "";

                        if (state.equals(TelephonyManager.EXTRA_STATE_RINGING)) {
                            number = intent.getStringExtra(TelephonyManager.EXTRA_INCOMING_NUMBER);
                        }

                        final JSONObject data = new JSONObject();
                        try {
                            data.put("state", state);
                            data.put("number", number);
                            callbackContext.success(data);
                        } catch (final JSONException e) {
                            callbackContext.error(e.getMessage());
                        }

                    }
                }
            };

            this.context.registerReceiver(this.receiver,
                    new IntentFilter(TelephonyManager.ACTION_PHONE_STATE_CHANGED));
        }
    }

    /**
     * removes the Receiver
     */
    private void removePhoneListener(final CallbackContext callbackContext) {
        if (this.receiver != null) {
            try {
                this.context.unregisterReceiver(this.receiver);
                this.receiver = null;
                callbackContext.success();
            } catch (final Exception e) {
                callbackContext.error(e.getMessage());
            }
        }
    }

    @Override
    public void onDestroy() {
        removePhoneListener();
    }
}