And, you don't have to do this.
_Adapter=null; // this line doesn't help
getListView().setAdapter(null); // neither does this line
On Oct 15, 1:43 pm, viktor <victor.scherb...@gmail.com> wrote:
> Hi Kebab,
>
> I propose you do not use this.getApplicationContext(), it will better
> if you use current Activity context, because application context live
> very long. It will destroyed when you uninstall your app.
>
> On 14 Жов, 18:58, Kebab <daalmightyke...@googlemail.com> wrote:
>
> > I have an application that uses a Service and some list activities.
> > When the activities are opened, I can see the heap usage increase in
> > DDMS. When the activities are closed, the heap usage decreases
> > slightly. The service is still running in the background at this
> > point. If the activity is started again by re-running the application
> > and then closed, the heap usage increases again then decreases, but
> > never returns to the original level before the activity was first
> > opened. If it repeatedly (10-15 times) open the activity then close
> > the activity, the heap size (both MB and # Objects) balloons!
>
> > I'd expect ListActivity's onDestroy to take care of itself when it
> > gets destroyed. What am I missing with this? Am I using ListActivity
> > incorrectly?
>
> > If I examine the heap using MAT, I see 10-15 ListView objects.
> > Unfortunately, I've not got much experience with MAT, but I think it
> > means that the instances are still hanging around rather than being
> > garbage collected. Can anyone explain what's going on?
>
> > A test app similar to my real code is below. Create a new android
> > application, add this to the manifest:
>
> > <service android:name="LeakTestService"/>
>
> > and these java files:
>
> > LeakTestActivity.java
> > -------------
> > package LeakTest.Test;
>
> > import java.util.ArrayList;
> > import java.util.HashMap;
>
> > import android.app.Activity;
> > import android.app.ListActivity;
> > import android.content.Intent;
> > import android.os.Bundle;
> > import android.widget.ArrayAdapter;
> > import android.widget.SimpleAdapter;
>
> > public class LeakActivity extends ListActivity {
> > ArrayList> _Data=new ArrayList>();
> > ArrayAdapter _Adapter;
>
> > /** Called when the activity is first created. */
> > @Override
> > public void onCreate(Bundle savedInstanceState) {
> > super.onCreate(savedInstanceState);
>
> > Intent svc = new Intent(this.getApplicationContext(),
> > LeakTestService.class);
> > startService(svc);
>
> > // the problem happens with both SimpleAdapter and
> > ArrayAdapter
> > //_Adapter = new SimpleAdapter(this.getApplicationContext(),
> > _Data, android.R.layout.two_line_list_item, new String[]
> > { "line1","line2" }, new int[] { android.R.id.text1,
> > android.R.id.text2 });
> > _Adapter = new ArrayAdapter(this.getApplicationContext(),
> > android.R.layout.simple_list_item_1, new String[] {"data1","data2"} );
>
> > // if this line is removed, the heap usage never balloons when
> > you repeatedly open+close it
> > getListView().setAdapter(_Adapter);
> > }
>
> > @Override
> > public void onDestroy() {
> > _Adapter=null; // this line doesn't help
> > getListView().setAdapter(null); // neither does this line
> > super.onDestroy();
> > }
>
> > }
>
> > LeakTestService.java
> > --------
> > package LeakTest.Test;
>
> > import android.app.Service;
> > import android.content.Intent;
> > import android.os.IBinder;
> > import android.widget.Toast;
>
> > public class LeakTestService extends Service {
> > @Override
> > public void onStart(Intent intent, int startId) {
> > Toast.makeText(getBaseContext(), "Service onStart",
> > Toast.LENGTH_SHORT).show();
> > }
>
> > @Override public void onDestroy() {
> > Toast.makeText(getBaseContext(), "Service onDestroy",
> > Toast.LENGTH_SHORT).show();
> > }
>
> > @Override
> > public IBinder onBind(Intent intent) {
> > // TODO Auto-generated method stub
> > return null;
> > }
>
> > }
>
>
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