How to create plugin in phonegap to run the application in background?

Question

I have created plugin for background service (to run the application in background) in phonegap.

here is my java code for plugin:

public class Backgr         


        

Answer 1

Creation of plugin is fine.You create your service just like a normal java file. And then As soon as you call this plugin . you just start your service like

startService(new Intent(this, MyService.class));

Then your service will run in background.This is an easy way to do.

If separately you create service then

Your Plugin should look like this

public class BackgroundService extends Plugin {

private static final String TAG = "BackgroundService";
private static final String CALL_SERVICE_ACTION = "callService";

@Override
public PluginResult execute(String action, JSONArray args, String callbackId)
{
    Log.i(TAG, "Plugin Called");
PluginResult result = null;

if (CALL_SERVICE_ACTION.equals(action)) {
    Log.d(TAG, "CALL_SERVICE_ACTION");
    startService(new Intent(ctx, MyService.class));
}

else {
    result = new PluginResult(Status.INVALID_ACTION);
    Log.d(TAG, "Invalid action : " + action + " passed");
}

return result;
}
}

Your .js file should look like this

function BackgroundService() {
};

BackgroundService.prototype.callService = function(successCallback, failCallback) {

return PhoneGap.exec(successCallback, failCallback, "BackgroundService",
    "callService", [ null ]);
};

PhoneGap.addConstructor(function() {
PhoneGap.addPlugin("BackgroundService", new BackgroundService());
});

And your HTML file should look like this

function callServiceFunction() {
window.plugins.BackgroundService.callService('callService',
        callServiceSuccessCallBack, callServiceFailCallBack);

}
function callServiceSuccessCallBack(e) {
alert("Success");
}

function callServiceFailCallBack(f) {
alert("Failure");
}

Also you need to register your phonegap plugin in your res/xml/plugins.xml like

<plugin name="BackgroundService" value="package-structure.BackgroundService"/>

Answer 2

In the onCreate method of your Java class that extends from DroidGap make sure you have set "keepRunning" properly.

        super.setBooleanProperty("keepRunning", true);