It would still be nice to see some kind of callback/warning that such a thing is about to happen.
I'm writing an app that uses a cursor to iterate over images from the system's media-content-provider. Sometimes this content-provider is being shut-down (low memory) and it takes my application down with it. On Dec 6, 6:41 pm, Dianne Hackborn <[email protected]> wrote: > The system raises the level of the process(es) hosting content providers you > are using to the same level as yours; so if your app is in the foreground > when this happens, it means that there is just so little memory available in > the system that it can't even keep all of the foreground processes going, > and aside from simply not using that provider there is little you can do. > (You can be sure to not keep open access on providers, if you are keeping > them open for a long time, so the system has some other process to kill that > you don't need right then.) > > If this is happening while you are in the background running a service... > well, getting killed while in the background is something that will happen, > and the more sessions you have with providers the more likely it is to > happen since this causes more memory pressure. Again, only keep providers > open while you need them, and accept you will have your service killed at > some points, with or without it using providers. > > On 1.6 you can use "adb shell dumpsys activity" to see a list of all of the > running processes, what level they are at, and why this is, which can help > track down for example why a lot of processes may be in the foreground. > This is the second to last pocess list, with the oom_adj levels. > > On Sun, Dec 6, 2009 at 9:58 AM, Daniel <[email protected]>wrote: > > > > > > > Some of my apps silently close on my G1 (Android 1.6) because some > > Content Providers they use are hosted in processes that are killed due > > to low memory. Is there anything to protect an app from silently > > closing because a content provider it uses is shut down? Is there some > > remote exception to give the app a change to continue its work with > > less features (e.g. do not query dead content providers)? > > Below is a trace that shows this situation. > > > Quickdroid uses the BrowserProvider. But since the BrowserProvider and > > its hosting Linux process died, Quickdroid is also killed silently. > > That is a really bad user experience :-( > > > I/ActivityManager( 75): Starting activity: Intent > > { cmp=fm.last.android/.activity.Preferences } > > I/ActivityManager( 75): Process fm.last.android:player (pid 17574) > > has died. > > I/ActivityManager( 75): Low Memory: No more background processes. > > I/ActivityManager( 75): Displayed activity > > fm.last.android/.activity.Preferences: 844 ms (total 844 ms) > > D/dalvikvm(17546): GC freed 4991 objects / 247032 bytes in 155ms > > I/ActivityManager( 75): Start proc fm.last.android:player for > > service fm.last.android/.player.RadioPlayerService: pid=17676 > > uid=10051 gids={3003, 1015} > > I/fm.last.android.player(17676): Player service started > > I/ActivityManager( 75): Stopping service: > > fm.last.android/.player.RadioPlayerService > > I/fm.last.android.player(17676): Player service shutting down > > I/ActivityManager( 75): Start proc vu.de.urpool.quickdroid for > > activity vu.de.urpool.quickdroid/.Quickdroid: pid=17683 uid=10030 gids= > > {} > > I/ActivityManager( 75): Process fm.last.android:player (pid 17676) > > has died. > > I/ActivityManager( 75): Low Memory: No more background processes. > > I/ActivityThread(17683): Publishing provider quickdroid: > > vu.de.urpool.quickdroid.apps.AppProvider > > I/ActivityManager( 75): Start proc com.android.browser for content > > provider com.android.browser/.BrowserProvider: pid=17696 uid=10022 > > gids={3003} > > I/ActivityThread(17696): Publishing provider browser: > > com.android.browser.BrowserProvider > > I/ActivityManager( 75): Displayed activity > > vu.de.urpool.quickdroid/.Quickdroid: 2802 ms (total 2802 ms) > > I/ActivityManager( 75): Process fm.last.android (pid 17546) has > > died. > > I/WindowManager( 75): WIN DEATH: Window{4397eb40 fm.last.android/ > > fm.last.android.activity.Profile paused=false} > > I/ActivityManager( 75): Low Memory: No more background processes. > > I/ActivityThread(17683): Removing dead content provider: browser > > I/ActivityManager( 75): Process com.android.browser (pid 17696) has > > died. > > I/ActivityManager( 75): Killing app vu.de.urpool.quickdroid (pid > > 17683) because provider com.android.browser.BrowserProvider is in > > dying process com.android.browser > > I/Process ( 75): Sending signal. PID: 17683 SIG: 9 > > I/WindowManager( 75): WIN DEATH: Window{43a0eff0 > > vu.de.urpool.quickdroid/vu.de.urpool.quickdroid.Quickdroid > > paused=false} > > I/ActivityManager( 75): Low Memory: No more background processes. > > I/ActivityManager( 75): Process vu.de.urpool.quickdroid (pid 17683) > > has died. > > W/UsageStats( 75): Unexpected resume of com.android.launcher while > > already resumed in vu.de.urpool.quickdroid > > I/ActivityManager( 75): Low Memory: No more background processes. > > W/InputManagerService( 75): Got RemoteException sending setActive > > (false) notification to pid 17683 uid 10030 > > I/ActivityManager( 75): Starting activity: Intent > > { act=android.intent.action.MAIN cat= > > [android.intent.category.LAUNCHER] flg=0x10200000 > > cmp=vu.de.urpool.quickdroid/.Quickdroid } > > I/ActivityManager( 75): Start proc vu.de.urpool.quickdroid for > > activity vu.de.urpool.quickdroid/.Quickdroid: pid=17708 uid=10030 gids= > > {} > > D/dalvikvm( 50): GC freed 269 objects / 10248 bytes in 174ms > > D/dalvikvm( 50): GC freed 42 objects / 1816 bytes in 104ms > > D/dalvikvm( 50): GC freed 2 objects / 56 bytes in 83ms > > I/ActivityThread(17708): Publishing provider quickdroid: > > vu.de.urpool.quickdroid.apps.AppProvider > > I/ActivityManager( 75): Displayed activity > > vu.de.urpool.quickdroid/.Quickdroid: 1399 ms (total 1399 ms) > > I/ActivityManager( 75): Starting activity: Intent > > { act=android.intent.action.MAIN cat= > > [android.intent.category.LAUNCHER] flg=0x10000000 > > cmp=com.android.term/.Term } > > > -- > > 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]<android-developers%2bunsubs[email protected]> > > For more options, visit this group at > >http://groups.google.com/group/android-developers?hl=en > > -- > Dianne Hackborn > Android framework engineer > [email protected] > > Note: please don't send private questions to me, as I don't have time to > provide private support, and so won't reply to such e-mails. All such > questions should be posted on public forums, where I and others can see and > answer them.- Hide quoted text - > > - Show quoted text - -- 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
