There appears to be a leak when using PhoneStateListeners. The
following code simply reigsters in onResume and unregisters in onPause
a PhoneStateListener. Repeatedly launch then press BACK (so the app
is finished & onDestory is called before the next launch) and the
number of activities reported by meminfo will equal the number of
launches. For instance, here is the output I get after launching (and
finishing) 11 times in sequence:
dumpsys meminfo com.example.leak
Currently running services:
meminfo
-------------------------------------------------------------------------------
DUMP OF SERVICE meminfo:
Applications Memory Usage (kB):
Uptime: 12204322 Realtime: 12204322
** MEMINFO in pid 1358 [com.example.leak] **
native dalvik other total
size: 2648 3079 N/A 5727
allocated: 2604 2254 N/A 4858
free: 43 825 N/A 868
(Pss): 913 1305 1475 3693
(shared dirty): 1080 3864 568 5512
(priv dirty): 808 936 1056 2800
Objects
Views: 77 ViewRoots: 1
AppContexts: 12 Activities: 11
Assets: 2 AssetManagers: 2
Local Binders: 36 Proxy Binders: 21
Death Recipients: 0
OpenSSL Sockets: 0
SQL
heap: 0 dbFiles: 0
numPagers: 0 inactivePageKB: 0
activePageKB: 0
#
Without the PhoneStateListener, the number of activities is always 1
no matter how many times the app is launched & finished. So, am I
doing anything wrong here? Or is this a bug in the
TelephonyManager?
Thanks,
Steve
############ here's the code
package com.example.leak;
import android.app.Activity;
import android.content.Context;
import android.os.Bundle;
import android.telephony.PhoneStateListener;
import android.telephony.TelephonyManager;
import android.util.Log;
public class LeakExample extends Activity {
private class MyPhoneStateListener extends PhoneStateListener {
@Override
public void onCallStateChanged(int state, String
incomingNumber) {
if ((state == TelephonyManager.CALL_STATE_RINGING)
|| (state ==
TelephonyManager.CALL_STATE_OFFHOOK)) {
LeakExample.this.finish();
}
}
}
MyPhoneStateListener phone_listener = new MyPhoneStateListener();
TelephonyManager telMgr ;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
telMgr = (TelephonyManager) getSystemService
(Context.TELEPHONY_SERVICE);
}
@Override
protected void onPause() {
super.onPause();
telMgr.listen(phone_listener, PhoneStateListener.LISTEN_NONE);
}
@Override
protected void onResume() {
super.onResume();
telMgr.listen(phone_listener,
PhoneStateListener.LISTEN_CALL_STATE);
}
@Override
protected void onDestroy() {
super.onDestroy();
Log.v("LEAK EXAMPLE", "onDestory");
}
}
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