Hi,
So the problem is quite simple. I start a Service from an Activity,
the user presses back, the Activity goes away and the Service stays
running in the background. However the activity (and it's views) still
stay in memory. Any ideas why is that?? I tested this with cupcake and
G1. To reproduce I've made a simple program.
The activity:
package com.android.service_test;
import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
public class StartService extends Activity {
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
startService(new Intent(getApplication(),
RunningService.class));
}
}
The service:
package com.android.service_test;
import android.app.Service;
import android.content.Intent;
import android.os.IBinder;
public class RunningService extends Service {
@Override
public void onCreate() {
super.onCreate();
}
@Override
public void onStart(Intent intent, int startId) {
super.onStart(intent, startId);
new Thread(new Runnable() {
public void run() {
while(true) {
System.err.println("running");
try {
Thread.sleep(1000);
} catch (InterruptedException e) {
// TODO Auto-generated catch
block
e.printStackTrace();
}
}
}
}).start();
}
@Override
public IBinder onBind(Intent intent) {
// TODO Auto-generated method stub
return null;
}
}
Manifest:
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android";
package="com.android.service_test"
android:versionCode="1"
android:versionName="1.0">
<application android:icon="@drawable/icon" android:label="@string/
app_name">
<activity android:name=".StartService"
android:label="@string/app_name">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category
android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<service android:name=".RunningService" />
</application>
<uses-sdk android:minSdkVersion="3" />
</manifest>
With this sample the activity on foreground, meminfo gives
** MEMINFO in pid 633 [com.android.service_test] **
native dalvik other total
size: 2368 2819 N/A 5187
allocated: 2364 2159 N/A 4523
free: 3 660 N/A 663
(Pss): 562 786 928 2276
(shared dirty): 1132 3940 480 5552
(priv dirty): 488 556 864 1908
Objects
Views: 7 ViewRoots: 1
AppContexts: 3 Activities: 1
Assets: 2 AssetManagers: 2
Local Binders: 6 Proxy Binders: 11
Death Recipients: 0
OpenSSL Sockets: 0
SQL
heap: 0 dbFiles: 0
numPagers: 0 inactivePageKB: 0
activePageKB: 0
And after the activity has been destroyed meminfo gives:
** MEMINFO in pid 633 [com.android.service_test] **
native dalvik other total
size: 2380 2819 N/A 5199
allocated: 2353 2085 N/A 4438
free: 26 734 N/A 760
(Pss): 608 929 1065 2602
(shared dirty): 1088 3852 584 5524
(priv dirty): 544 712 768 2024
Objects
Views: 7 ViewRoots: 0
AppContexts: 3 Activities: 1
Assets: 2 AssetManagers: 2
Local Binders: 5 Proxy Binders: 10
Death Recipients: 0
OpenSSL Sockets: 0
SQL
heap: 0 dbFiles: 0
numPagers: 0 inactivePageKB: 0
activePageKB: 0
And I remembered to force the garbage collector to system_process and
to the app process. Any ideas what is happening here??
-Mika
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