Is it possible to utilize the users phone through their cell provider, and track the length of a phone call?
So the user presses a button in the app "Call Now". A call begins to a pre-determined number. We record the start time. When the call ends, we calculate how many minutes were used.
Possible?
To calculate time talked for both incoming , outgoing calls use the following broadcast receiver :
public class CallDurationReceiver extends BroadcastReceiver {
static boolean flag = false;
static long start_time, end_time;
@Override
public void onReceive(Context arg0, Intent intent) {
String action = intent.getAction();
if (action.equalsIgnoreCase("android.intent.action.PHONE_STATE")) {
if (intent.getStringExtra(TelephonyManager.EXTRA_STATE).equals(
TelephonyManager.EXTRA_STATE_RINGING)) {
start_time = System.currentTimeMillis();
}
if (intent.getStringExtra(TelephonyManager.EXTRA_STATE).equals(
TelephonyManager.EXTRA_STATE_IDLE)) {
end_time = System.currentTimeMillis();
//Total time talked =
long total_time = end_time - start_time;
//Store total_time somewhere or pass it to an Activity using intent
}
}
}
Register your receiver in your manifest file like this:
<receiver android:name=".CallDurationReceiver">
<intent-filter>
<action android:name="android.intent.action.PHONE_STATE" />
</intent-filter>
</receiver>
Also add the uses permission:
<uses-permission android:name="android.permission.READ_PHONE_STATE" />