Wednesday, April 27, 2011

Inent-filter to listen for internet/data connectivity status

When designing home screen widgets which tries to talk to cloud, we might be interested in knowing internet connectivity status of device. Suppoese when adding widget, data connectivity might not be available, but your would expect your widget to start collecting data, as and when device is connected to internet.

1- Check for internet connectivity / data connectivity.

private boolean checkInternetConnection() {

ConnectivityManager conMgr = (ConnectivityManager) mContext.getSystemService (mContext.CONNECTIVITY_SERVICE);


if (conMgr.getActiveNetworkInfo() != null
&& conMgr.getActiveNetworkInfo().isAvailable()
&& conMgr.getActiveNetworkInfo().isConnected()) {
return true;
} else {
return false;


2 - To receive for Internet Connectivity dropped / up, listen for
'ConnectivityManager.CONNECTIVITY_ACTION' action.

IntentFilter filter = new IntentFilter();
mContext.registerReceiver(mNetworkStateIntentReceiver, filter);

3 - Whenever there is a change in connectivity i.e it could be either data connection is connected or disconnected, you will receive this event as broadcast, so in onreceive of the broadcast receiver, please check for internetconnect connection and decide whether internet is up or down.

BroadcastReceiver mNetworkStateIntentReceiver = new BroadcastReceiver() {
public void onReceive(Context context, Intent intent) {
if (intent.getAction().equals(
ConnectivityManager.CONNECTIVITY_ACTION)) {

NetworkInfo info = intent.getParcelableExtra(
String typeName = info.getTypeName();
String subtypeName = info.getSubtypeName();
System.out.println("Network is up ******** "+typeName+":::"+subtypeName);

if( checkInternetConnection()== true )
"Decide your code logic here...."


Wednesday, April 13, 2011

How to dismiss your non-modal dialog, when touched outside dialog region

When you implement your dialog as non-modal dialog, means when your dialog is shown, you can interact with other elements on the screen, in such case, you might be interested to dismiss the dialog, when user touches/press/interacts with other elments on the screen. The following steps will help you to reeceive for the touch events outside your non-modal dialog.

1 - Set the flag-FLAG_NOT_TOUCH_MODAL for your dialog's window attribute

Window window = this.getWindow();

2 - Add another flag to windows properties,, FLAG_WATCH_OUTSIDE_TOUCH - this one is for dialog to receive touch event outside its visible region.

3 - Override onTouchEvent() of dialog and check for action type. if the action type is
'MotionEvent.ACTION_OUTSIDE' means, user is interacting outside the dialog region. So in this case, you can dimiss your dialog or decide what you wanted to perform.

public boolean onTouchEvent(MotionEvent event)

if(event.getAction() == MotionEvent.ACTION_OUTSIDE){
System.out.println("TOuch outside the dialog ******************** ");
return false;