I am New to this Android platform. In one application, there is a memory leak. But I couldn't able to find in which activity or class the memory leak is happening. I am using MAT to get the information that the memory leak is there or not. But not able to find which activity is leaking. Please tell me how to find the which activity is leaking.
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In my app activity A creates activity B, however when the back key is pressed it goes back to activity A. This is a simplified version of my application. I would expect memory to be reclaimed when going back to Activity A. Going to activity B allocates more memory. I am using dumpsys meminfo to get the allocated kbs. How can I easily tell what memory is creeping? I do not keep any references to activity B. I know about the ddms allocation tracker, but wondering if there is a more better tool to figure this out.
View 2 Replies View RelatedI am using a simple frame animation and when I exit and reenter my activity the activity is still referenced in memory.
//This is a sample activity I created to simulate the problem public class MemoryLeakActivity extends Activity {
@Override public void onCreate(final Bundle savedInstanceState) super.onCreate(savedInstanceState);
} @Override public boolean onKeyDown(final int keyCode, final KeyEvent event) {
final Intent i = new Intent(MemoryLeakActivity.this, LeakyActivy.class);
startActivity(i); return super.onKeyDown(keyCode, event);
} }
I would like to know is there any tool in android to find memory leak and code optimization.
View 8 Replies View RelatedThe error I receive is, "android.content.ActivityNotFoundException: Unable to find explicit activity class {com.droidea.birthday/ EditBirthdayActivity}; have you declared this activity in your AndroidManifest.xml?"
The error seems simple enough, but I don't see a problem with the way I have identified this activity in my manifest file. I have also been unable to see any problems with the activity class itself..............
I want to specifically run the default Android browser for a given URL. I'm using this code: I also tried adding <uses-library android:name="com.google.android.browser" /> to the manifest. Am I missing something here? PS: I'm not interested in using startActivity(new Intent(Intent.ACTION_VIEW, Uri.parse("http://www.google.com"))) as it will list all the choices for the browsing Intent.
View 3 Replies View RelatedI have a ListActivity containing an object I've defined called a MessageItem. I want to pass the data in this MessageItem off to a Service to do some stuff, but I don't want the Activity to be data bound to the Service such that Android can't reclaim the Activity if it needs to (ergo memory leak). What I'm doing is passing the MessageItem object to a method in a singleton class along with the application Context. The singleton method uses the application Context to start my Service. I pass to this Service an Intent. In this Intent, I put items from the MessageItem object like so:
intent.putExtra("subject", msg.getSubject());
intent.putExtra("summary", msg.getSummary());
intent.putExtra("created_on", msg.getCreatedDate());
intent.putExtra("read", msg.getIsRead());
Will this data bind my Activity to the Service the Intent gets passed into and cause a memory leak? Would this be a better implementation?:
intent.putExtra("subject", new String(msg.getSubject()));
intent.putExtra("summary", new String(msg.getSummary()));
intent.putExtra("created_on", new Integer(msg.getCreatedDate()));
intent.putExtra("read", new Boolean(msg.getIsRead()));
When start Activity A, I found the memory usage of application is about 5MB. Then start Activity B from A via startActivity. In Activity B, I created a thread, and traverse file system in this thread, after traversing completed, call finish() and to return to Activity A. At this time, I found the memory usage of application is about 8MB (GC is forced before check memory usage). How to find Where memory leaks? By the way, I checked the memory usage with DDMS.
View 5 Replies View RelatedI'm just getting into Android development, and I have a question about communicating between a receiver class and an activity class. I'm very new to JAVA and Android so I hope I don't sound too stupid. I'm developing an application where I intercept an SMS message and then based on various elements of that SMS I might delete it once it's been saved to the inbox. I have a receiver class that intercepts the txt message, and I am also able to delete messages from my inbox with code in the activity class using a button at the moment. The problem I have is communicating between the receiver class and the activity class where the code to delete a message resides. I tried putting that code directly into the receiver class but as I'm sure most of you already know the BroadcastReceiver class doesn't seem to support what I need to delete messages. I've been searching for an answer to this for a while, but haven't been able to find anything. Honestly I'm not sure I know enough about JAVA and Android to even recognize a solution if I saw it.
View 2 Replies View RelatedI'm new to Java and android development. In my application I need data which is accessible for a few activities. I've read that a good solution is to use Application class for this. So I use it like this:
public class MyApplication extends Application {
private String str;
public String getStr(){
return str;
}
public void setStr(String s){
str = s;
}
}
and I can access this variable from activity like this:........................................
I have just started android. I just want to know that how can i call activity class from other java class. i just want to pass class object to activity class.
public class GsonParser extends Activity {
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
MagazineThread thread=new MagazineThread();
thread.start();
}
public GsonParser(JsonMagazineParser Obj)
{
}
}
and i am just doing like from other class. GsonParser obj=new GsonParser(this);passing obj to activity class.how can i achieve that.
If I create and release multiple AudioTrack objects, the GREF count continually increases which eventually causes an application crash. Even with a forced garbage collection, I end up with the same high GREF count at the end of the loop.In my application, I continuously create AudioTracks from variable lenght buffers.I guess I can try and use a fixed size pool of AudioTracks each with a buffer large enough to fit my longest sound, and try and reuse them.Is there a better/correct way to completely clear resources used by an AudioTrack?
View 5 Replies View RelatedI have been banging away at this one for weeks and I feel like I have exhausted my research capabilities. I am hoping that someone will see my error in the code posted below. The code is completely functional doing everything I need, but there is a major memory leak. When I try to track memory in the DDMS, the VM Heap tells me that my object count is relatively stable and the used memory is also relatively stable (it comes back down to a similar value after each GC after panning).
When I look at the memory pie chart, the free memory loses over 1meg of capacity with each map pan (overlay reload) and the Unknown memory grows. I have not found anything with the allocation tracker. Functional Summary: I load overlays onto a map based on data I get from polling my server. When I pan the map far enough I clear the overlays and load new ones.
MapFrontEnd.java (snippets): //header info private List<Overlay> overlays;
//in onCreate overlays = mapView.getOverlays();
// here I attempt to fully clean up my old Overlays for (Overlay i : overlays) {
if (i instanceof ParcelOverlay) ((ParcelOverlay) i).cleanUp(); }
In my app, I'm fetching data via HTTP and use the response string to create an ArrayList of objects. So what I'm doing once I get the response is:
String[] fields = response.split("<field>");
and use the field[] values like this:
ArrayList<Movie> movies = new ArrayList<Movie>(); for (int row = 1; row < fields.length; row += 9) { movies.add(new Movie(fields[row], fields[row + 1], ..., fields[row + 8]);
}
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:
CODE:................
I am experiencing a memory / resource leak on a T-Mobile G1 device with my application. I installed the "Task Manager" application from Android market and my memory usage is not monotonically increasing. It stays relatively flat over time. Furthermore, none of the other processes are chewing up tons of memory either (really, I can get into this state with just my app running). I am not experiencing this problem on any of the other Android phones (including Eris, Hero, and Droid).
The interesting thing is that if I kill my application, the phone is *still* very slow and sluggish. The only thing that seems to be able to get me out of this situation is a battery pull. If I run my application for about 3 hours, the phone starts to become very sluggish. Even simple operations like hitting the "home" button take many seconds. I'm not sure what to do at this point and am wondering where I can go from here.
I'm parsing a document with large text field. In my characters section I am using StringBuilder
currentStory.append(ch, start, length);
then in my endElement i'm assigning it to the appropriate field on my object.
if (name.equals(tagDesc)) { inDesc = false;
if (currentItem != null ) { currentItem.setSummaryText(currentStory.toString());
} currentStory.setLength(0);
} setSummary is public void setSummaryText(String text) { Story = text;
}
And I am running out of memory. If I change setSummaryText to something completely weird like this:
public void setSummaryText(String text) { char[] local = text.toString(
) Story = new String(local);
}
I am fine. I just cant figure out where I am holding that reference?
Story is a member var of this object initialized with "";
Note - assigning to local String variable instead of char[] - fails as well.
I know that's a subject which was discuss a lot of time and I try to find a solution since more than 6 day for the memory leak which appears in my application.
I've read this page: http://www.curious-creature.org/2008/12/18/avoid-memory-leaks-on-andr...
So, I don't use static member fields, I always use recycle() and I don't use inner class.
My application use a gallery and some bitmap. I use finalize to monitor garbage collection in each class of my application: protected void finalize() throws Throwable {try {Log.d("FINALIZE", this.toString());} finally {super.finalize();}
After several hours of searching for the cause of a Out Of Memory Error, I found a wierd problem with Strings. To keep it simple, trimmed it down to something like this:
ArrayList<String> someStringList = new ArrayList<String>(1000);
for (int i=0; i<1000; i++) {
String someBigString = new String(new char[100000]);
String someSmallString = someBigString.substring(0,1);
someStringList.add(someSmallString);
}
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: 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?
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");
}
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. 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));
} }
I've been trying to diagnose a memory leak in an Android application I'm writing. I got a heap dump loaded into Eclipse, but the results I'm seeing are very curious. There are some 20,000 instances of an exception (specifically, LDAPException from the UnboundID LDAP library) in the heap with no inbound references.
That is, they show up at the root of the dominator tree. The OQL SELECT objects e FROM com.unboundid.ldap.sdk.LDAPException e WHERE (inbounds(e).length = 0) returns over 20,000 results, totalling to nearly all of the heap. And yet, the GC runs before the heap dump and I can see that it's running in the console, repeatedly, during the execution of the leaky code. If these instances have no inbound refs, what could be keeping them alive?
I also tried doing a "shortest paths to GC" query. It shows one LDAPConnectionReader row retaining 2 instances, and ~20k LDAPException @ <addr> unknown rows with various hex addresses.
Update: I haven't had time to further diagnose this since posting it, and the bounty I posted is ending before I likely will. I'm awarding it as best I can now, lest the points go to waste. Thanks to everyone who looked into this! I will come back later and update again with the results of further diagnosis, when life is a little less hectic.
An activity can be called from existing activity through *startActivity(intent); *
Is t possible to call an activity from non Activity class ? and how?
I've got a custom view in which I need to draw two bitmaps, one is a background, representing the image of a map and one is a pin which will be drawn on top/left position in canvas.
The both images are drawn onDraw and remain the same during the live of the activity that contains the view. After a while I get a OutOfMemoryError: bitmap size exceeds
VM budget
This means that I have a leak and the bitmaps don't get garbage collected. I asked this question before, but now the situation changed a little. I made a init method where I set the bitmaps I want to use but this still isn't a good approach, the error appears later, but still there.
Here is the code:
public class MyMapView extends View
private int xPos = 0;
private int yPos = 0;
private int space = 0;
private Bitmap resizedBitmap;
private Bitmap position;
private Bitmap mapBitmap;
public void destroy()
resizedBitmap.recycle();
resizedBitmap=null;
position.recycle();
position=null;
mapBitmap.recycle();
mapBitmap=null;
I call the setMapBitmap() and init() on onCreate of the activity that contains the view. In there I know what bitmap will be used as map. onPause of the activity I call the destroy() of the view. I still get errors.
I've read this this but I don't know how to adapt it on my case
I AM OPEN TO ANY OTHER SOLUTION. Please note that I need to resize the map bitmap (based on the height of the layout that contains it in mai activity) and still be able to draw the position on correct place.
I use advanced task killer to keep things under control, and handcent in favor of the stock msg app. I notice that I have upwards of 80mb free memory after killing tasks after a reboot. Over the course of the day, with only my ignored apps running, that number shrinks to 48-50mb. Does that indicate a leak somewhere?
View 6 Replies View RelatedI have an activity using an xml layout where a WebView is embedded. I am not using the WebView in my activity code at all, all it does is sitting there in my xml layout and being visible. Now, when I finish the activity, I find that my activity is not being cleared from memory. (I check via hprof dump). The activity is entirely cleared though if I remove the WebView from the xml layout.
I already tried a
webView.destroy();
webView = null;
in onDestroy() of my activity, but that doesn't help much.
In my hprof dump, my activity (named 'Browser') has the following remaining GC roots (after having called destroy() on it):
com.myapp.android.activity.browser.Browser
- mContext of android.webkit.JWebCoreJavaBridge
- sJavaBridge of android.webkit.BrowserFrame [Class]
- mContext of android.webkit.PluginManager
- mInstance of android.webkit.PluginManager [Class]
I found that another developer has experienced similar thing, see the reply of Filipe Abrantes on:
http://www.curious-creature.org/2008/12/18/avoid-memory-leaks-on-android/
Indeed a very interesting post. Recently I had a very hard time troubleshooting a memory leak on my Android app. In the end it turned out that my xml layout included a WebView component that, even if not used, was preventing the memory from being g-collected after screen rotations/app restart. Is this a bug of the current implementation, or is there something specific that one needs to do when using WebViews. Now, unfortunately there has been no reply on the blog or the mailing list about this question yet. Therefore I am wondering, is that a bug in the SDK (maybe similar to the MapView bug as reported:
http://code.google.com/p/android/issues/detail?id=2181)
or how to get the activity entirely off the memory with a webview embedded?
Since I have the v3 leak that came out today disguised as the official ota then where is my friend stream? what is it anyways?
View 9 Replies View RelatedWhen I first boot up the phone and check the memory (after shutting down all the apps I don't want running) I notice my phone has about 220-250 MB free after leaving the phone on for about 2-3 hours, with no activity on my part, that number gets smaller and smaller. I just rebooted my phone again because it was down to 125 MB free with no applications running.
Also, "Android System" is consuming 65% of my battery life. I realize that number is inaccurate after a fresh reboot so I played with the phone for a good 4 hours running apps and such, so that I could get a good test of how much the OS is eating up in comparison to other apps. 65% is a bit much no?
In Taskiller the amount of free memory is showing between 90-105mb. Is this normal? I have deleted text messages, cleared cache, deleting emails from inbox and trash etc. I going to get rid of a few apps too, but its a bummer if I cant have many apps due to it affecting memory!
Also I understand that if flash it with the Modaco custom ROM. I can create a swap partition, does this help a lot? Also would I lose quite a lot of the HTC Hero features such as Sense UI for example if I flash it with Modaco?
I think I've got a memory leak somewhere. I'm running DC v2.08.1 and I've got a low memory error. It may be because I flashed from Fresh 2.0D to this without wiping, but I'm not sure. Does anyone have any ideas how I can figure it out without wiping. I'd really rather not wipe again.
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