无法从ON_BOOT_COMPLETED广播接收器启动PhoneStateListener

Question

I am trying to restart a PhoneStateListener after the phone has been rebooted (if my isRunning SharedPref is true... ie the listener was running before the reboot)

Here is my code...

Eclipse gives me an error on the line: final TelephonyManager telephonyManager = (TelephonyManager)getSystemService(srvcName);

It says that getSystemService(String) is not defined. Anyone know why? The same basic code works just fine in my main app activity.

public class MyReceiver extends BroadcastReceiver {
    SharedPreferences mPrefs;

    String srvcName = Context.TELEPHONY_SERVICE;
    final TelephonyManager telephonyManager = (TelephonyManager)getSystemService(srvcName); 

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


        mPrefs = context.getSharedPreferences("myAppPrefs", 0); 
        if(getRunning()){
             telephonyManager.listen(phoneStateListener, PhoneStateListener.LISTEN_DATA_CONNECTION_STATE);
        }

      }

Answer 1

First, it won't compile because BroadcastReceiver is not a Context .

Second, a manifest-registered BroadcastReceiver cannot register a listener. That BroadcastReceiver object, and likely its whole process, will go away milliseconds after onReceive() completes.

Please listen for the ACTION_PHONE_STATE_CHANGED broadcast, which gives you the same information as a PhoneStateListener . As an added bonus, you will not need to get control at boot time, which saves you a permission and speeds up reboots on your users' phones.