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 <[email protected]> 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; > } > > > > > > > > } -- You received this message because you are subscribed to the Google Groups "Android Developers" group. To post to this group, send email to [email protected] To unsubscribe from this group, send email to [email protected] For more options, visit this group at http://groups.google.com/group/android-developers?hl=en
