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  3. LinearLayout с динамическими дочерними представлениями OutOfMemory Exception

LinearLayout с динамическими дочерними представлениями OutOfMemory Exception

2016-04-05 5 views
0

У меня есть ListView. Каждый ListViewItem представляет собой в основном LinearLayout с различным количеством изображений. Поэтому, когда я повторно использовать ListViewItem я называюLinearLayout с динамическими дочерними представлениями OutOfMemory Exception

mediaLinear.RemoveAllViewsInlayout();

А затем Еогеасп ввод данных Я вставив новый ImageView так:

public override View GetView (int position, View convertView, ViewGroup parent) 
{ 
    if (convertView == null) { 
     convertView = LayoutInflater.From (_context).Inflate (Resource.Layout.PostsListItem, null); 
    } 
    ... 
    LinearLayout mediaLinear = convertView.FindViewById<LinearLayout> (Resource.Id.post_media); 
    mediaLinear.RemoveAllViewsInLayout(); 
    var ats = DBWorker.Instance.Connection.Table<Core.Local.Attachment>().Where (...); 
    foreach (var att in ats.ToListAsync().Result) { 
     var im = new ImageView (_context); //exception here 
     _memoryCache.SetImage (_context, im, att.url, MainActivity.TempFolder).ConfigureAwait(false); 
     mediaLinear.AddView (im); 
    } 
    ... 
    return convertView; 
}

Как правильно решить эту проблему?

[art] Clamp target GC heap from 111MB to 96MB 
    [art] Clamp target GC heap from 111MB to 96MB 
    [art] Alloc partial concurrent mark sweep GC freed 45(1728B) AllocSpace objects, 2(32KB) LOS objects, 0% free, 95MB/96MB, paused 1.368ms total 13.142ms 
    no cache for item 
    55868 Childs count: 1 
    ...... 
    [art] native: #36 pc 000ad117 /data/dalvik-cache/x86/[email protected]@[email protected]@classes.dex (Java_md51390a9bb27ae81984ed2b5a51b13bec9_PostsListViewAdapter_n_1getView__ILandroid_view_View_2Landroid_view_ViewGroup_2+187) 
    [art] at md51390a9bb27ae81984ed2b5a51b13bec9.PostsListViewAdapter.n_getView(Native method) 
    [art] at md51390a9bb27ae81984ed2b5a51b13bec9.PostsListViewAdapter.getView(PostsListViewAdapter.java:46) 
    [art] at android.widget.AbsListView.obtainView(AbsListView.java:2347) 
    [art] at android.widget.ListView.makeAndAddView(ListView.java:1864) 
    [art] at android.widget.ListView.fillUp(ListView.java:732) 
    [art] at android.widget.ListView.fillGap(ListView.java:671) 
    [art] at android.widget.AbsListView.trackMotionScroll(AbsListView.java:4991) 
    [art] at android.widget.AbsListView$FlingRunnable.run(AbsListView.java:4539) 
    [art] at android.view.Choreographer$CallbackRecord.run(Choreographer.java:767) 
    [art] at android.view.Choreographer.doCallbacks(Choreographer.java:580) 
    [art] at android.view.Choreographer.doFrame(Choreographer.java:549) 
    [art] at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:753) 
    [art] at android.os.Handler.handleCallback(Handler.java:739) 
    [art] at android.os.Handler.dispatchMessage(Handler.java:95) 
    [art] at android.os.Looper.loop(Looper.java:135) 
    [art] at android.app.ActivityThread.main(ActivityThread.java:5254) 
    [art] at java.lang.reflect.Method.invoke!(Native method) 
    [art] at java.lang.reflect.Method.invoke(Method.java:372) 
    [art] at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:903) 
    [art] at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:698) 
    [Mono] Assembly Ref addref Mono.Android[0xf3fca100] -> System.Runtime.Serialization[0xd9adde80]: 3 
    [art] Clamp target GC heap from 111MB to 96MB 
    [art] Alloc partial concurrent mark sweep GC freed 0(0B) AllocSpace objects, 0(0B) LOS objects, 0% free, 95MB/96MB, paused 569us total 11.319ms 
    [art] Clamp target GC heap from 111MB to 96MB 
    [art] Alloc concurrent mark sweep GC freed 0(0B) AllocSpace objects, 0(0B) LOS objects, 0% free, 95MB/96MB, paused 626us total 17.213ms 
    [art] Forcing collection of SoftReferences for 20B allocation 
    [art] Clamp target GC heap from 111MB to 96MB 
    [art] Alloc concurrent mark sweep GC freed 0(0B) AllocSpace objects, 0(0B) LOS objects, 0% free, 95MB/96MB, paused 537us total 15.912ms 
    [art] Throwing OutOfMemoryError "Failed to allocate a 20 byte allocation with 16 free bytes and 16B until OOM" 
    [art] Clamp target GC heap from 111MB to 96MB 
    [art] Alloc partial concurrent mark sweep GC freed 0(0B) AllocSpace objects, 0(0B) LOS objects, 0% free, 95MB/96MB, paused 1.183ms total 13.635ms 
    [art] Clamp target GC heap from 111MB to 96MB 
    [art] Alloc concurrent mark sweep GC freed 0(0B) AllocSpace objects, 0(0B) LOS objects, 0% free, 95MB/96MB, paused 968us total 18.755ms 
    [art] Forcing collection of SoftReferences for 28B allocation 
    [art] Clamp target GC heap from 111MB to 96MB 
    [art] Alloc concurrent mark sweep GC freed 0(0B) AllocSpace objects, 0(0B) LOS objects, 0% free, 95MB/96MB, paused 1.653ms total 17.441ms 
    [art] Throwing OutOfMemoryError "Failed to allocate a 28 byte allocation with 16 free bytes and 16B until OOM" (recursive case) 
    [art] "main" prio=5 tid=1 Runnable 
    [art] | group="main" sCount=0 dsCount=0 obj=0x739e6000 self=0xf3c25800 
    [art] | sysTid=16583 nice=-6 cgrp=default sched=0/0 handle=0xf7711ea0 
    [art] | state=R schedstat=(51640943258 3602210510 26084) utm=3430 stm=1733 core=2 HZ=100 
    [art] | stack=0xff04c000-0xff04e000 stackSize=8MB 
    [art] | held mutexes= "mutator lock"(shared held) 
    [art] at android.view.View.toString(View.java:4250) 
    [art] at md51390a9bb27ae81984ed2b5a51b13bec9.PostsListViewAdapter.n_getView(Native method) 
    [art] at md51390a9bb27ae81984ed2b5a51b13bec9.PostsListViewAdapter.getView(PostsListViewAdapter.java:46) 
    [art] at android.widget.AbsListView.obtainView(AbsListView.java:2347) 
    [art] at android.widget.ListView.makeAndAddView(ListView.java:1864) 
    [art] at android.widget.ListView.fillUp(ListView.java:732) 
    [art] at android.widget.ListView.fillGap(ListView.java:671) 
    [art] at android.widget.AbsListView.trackMotionScroll(AbsListView.java:4991) 
    [art] at android.widget.AbsListView$FlingRunnable.run(AbsListView.java:4539) 
    [art] at android.view.Choreographer$CallbackRecord.run(Choreographer.java:767) 
    [art] at android.view.Choreographer.doCallbacks(Choreographer.java:580) 
    [art] at android.view.Choreographer.doFrame(Choreographer.java:549) 
    [art] at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:753) 
    [art] at android.os.Handler.handleCallback(Handler.java:739) 
    [art] at android.os.Handler.dispatchMessage(Handler.java:95) 
    [art] at android.os.Looper.loop(Looper.java:135) 
    [art] at android.app.ActivityThread.main(ActivityThread.java:5254) 
    [art] at java.lang.reflect.Method.invoke!(Native method) 
    [art] at java.lang.reflect.Method.invoke(Method.java:372) 
    [art] at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:903) 
    [art] at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:698) 
    [art] Alloc sticky concurrent mark sweep GC freed 0(0B) AllocSpace objects, 0(0B) LOS objects, 0% free, 95MB/96MB, paused 5.480ms total 7.922ms 
    [art] Clamp target GC heap from 111MB to 96MB 
    [art] Alloc partial concurrent mark sweep GC freed 0(0B) AllocSpace objects, 0(0B) LOS objects, 0% free, 95MB/96MB, paused 1.134ms total 16.326ms 
    [art] Clamp target GC heap from 111MB to 96MB 
    [art] Alloc concurrent mark sweep GC freed 0(0B) AllocSpace objects, 0(0B) LOS objects, 0% free, 95MB/96MB, paused 892us total 17.164ms 
    [art] Forcing collection of SoftReferences for 20B allocation 
    [art] Clamp target GC heap from 111MB to 96MB 
    [art] Alloc concurrent mark sweep GC freed 0(0B) AllocSpace objects, 0(0B) LOS objects, 0% free, 95MB/96MB, paused 1.042ms total 17.104ms 
    [art] Throwing OutOfMemoryError "Failed to allocate a 20 byte allocation with 16 free bytes and 16B until OOM" 
    [art] Clamp target GC heap from 111MB to 96MB 
    [art] Alloc partial concurrent mark sweep GC freed 0(0B) AllocSpace objects, 0(0B) LOS objects, 0% free, 95MB/96MB, paused 1.701ms total 16.814ms 
    [art] Clamp target GC heap from 111MB to 96MB 
    [art] Alloc concurrent mark sweep GC freed 0(0B) AllocSpace objects, 0(0B) LOS objects, 0% free, 95MB/96MB, paused 1.728ms total 17.024ms 
    [art] Forcing collection of SoftReferences for 28B allocation 
    [art] Clamp target GC heap from 111MB to 96MB 
    [art] Alloc concurrent mark sweep GC freed 0(0B) AllocSpace objects, 0(0B) LOS objects, 0% free, 95MB/96MB, paused 643us total 17.888ms 
    [art] Throwing OutOfMemoryError "Failed to allocate a 28 byte allocation with 16 free bytes and 16B until OOM" (recursive case) 
    [art] "main" prio=5 tid=1 Runnable 
    [art] | group="main" sCount=0 dsCount=0 obj=0x739e6000 self=0xf3c25800 
    [art] | sysTid=16583 nice=-6 cgrp=default sched=0/0 handle=0xf7711ea0 
    [art] | state=R schedstat=(51750576514 3606256916 26097) utm=3438 stm=1736 core=3 HZ=100 
    [art] | stack=0xff04c000-0xff04e000 stackSize=8MB 
    [art] | held mutexes= "mutator lock"(shared held) 
    [art] at android.view.View.toString(View.java:4250) 
    [art] at md51390a9bb27ae81984ed2b5a51b13bec9.PostsListViewAdapter.n_getView(Native method) 
    [art] at md51390a9bb27ae81984ed2b5a51b13bec9.PostsListViewAdapter.getView(PostsListViewAdapter.java:46) 
    [art] at android.widget.AbsListView.obtainView(AbsListView.java:2347) 
    [art] at android.widget.ListView.makeAndAddView(ListView.java:1864) 
    [art] at android.widget.ListView.fillUp(ListView.java:732) 
    [art] at android.widget.ListView.fillGap(ListView.java:671) 
    [art] at android.widget.AbsListView.trackMotionScroll(AbsListView.java:4991) 
    [art] at android.widget.AbsListView$FlingRunnable.run(AbsListView.java:4539) 
    [art] at android.view.Choreographer$CallbackRecord.run(Choreographer.java:767) 
    [art] at android.view.Choreographer.doCallbacks(Choreographer.java:580) 
    [art] at android.view.Choreographer.doFrame(Choreographer.java:549) 
    [art] at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:753) 
    [art] at android.os.Handler.handleCallback(Handler.java:739) 
    [art] at android.os.Handler.dispatchMessage(Handler.java:95) 
    [art] at android.os.Looper.loop(Looper.java:135) 
    [art] at android.app.ActivityThread.main(ActivityThread.java:5254) 
    [art] at java.lang.reflect.Method.invoke!(Native method) 
    [art] at java.lang.reflect.Method.invoke(Method.java:372) 
    [art] at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:903) 
    [art] at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:698) 
    [art] Clamp target GC heap from 111MB to 96MB 
    [art] Alloc partial concurrent mark sweep GC freed 0(0B) AllocSpace objects, 0(0B) LOS objects, 0% free, 95MB/96MB, paused 592us total 13.027ms 
    [art] Clamp target GC heap from 111MB to 96MB 
    [art] Alloc concurrent mark sweep GC freed 0(0B) AllocSpace objects, 0(0B) LOS objects, 0% free, 95MB/96MB, paused 844us total 16.250ms 
    [art] Forcing collection of SoftReferences for 52B allocation 
    [art] Clamp target GC heap from 111MB to 96MB 
    [art] Alloc concurrent mark sweep GC freed 0(0B) AllocSpace objects, 0(0B) LOS objects, 0% free, 95MB/96MB, paused 619us total 15.621ms 
    [art] Throwing OutOfMemoryError "Failed to allocate a 52 byte allocation with 16 free bytes and 16B until OOM" 
    [art] Clamp target GC heap from 111MB to 96MB 
    [art] Alloc partial concurrent mark sweep GC freed 0(0B) AllocSpace objects, 0(0B) LOS objects, 0% free, 95MB/96MB, paused 600us total 10.853ms 
    [art] Clamp target GC heap from 111MB to 96MB 
    [art] Alloc concurrent mark sweep GC freed 0(0B) AllocSpace objects, 0(0B) LOS objects, 0% free, 95MB/96MB, paused 920us total 16.905ms 
    [art] Forcing collection of SoftReferences for 28B allocation 
    [art] Clamp target GC heap from 111MB to 96MB 
    [art] Alloc concurrent mark sweep GC freed 0(0B) AllocSpace objects, 0(0B) LOS objects, 0% free, 95MB/96MB, paused 1.314ms total 15.773ms 
    [art] Throwing OutOfMemoryError "Failed to allocate a 28 byte allocation with 16 free bytes and 16B until OOM" (recursive case) 
    [art] "main" prio=5 tid=1 Runnable 
    [art] | group="main" sCount=0 dsCount=0 obj=0x739e6000 self=0xf3c25800 
    [art] | sysTid=16583 nice=-6 cgrp=default sched=0/0 handle=0xf7711ea0 
    [art] | state=R schedstat=(51849796865 3607688955 26109) utm=3447 stm=1737 core=3 HZ=100 
    [art] | stack=0xff04c000-0xff04e000 stackSize=8MB 
    [art] | held mutexes= "mutator lock"(shared held) 
    [art] native: #00 pc 00005d03 /system/lib/libbacktrace_libc++.so (UnwindCurrent::Unwind(unsigned int, ucontext*)+83) 
    [art] native: #01 pc 00003051 /system/lib/libbacktrace_libc++.so (Backtrace::Unwind(unsigned int, ucontext*)+33) 
    [art] native: #02 pc 003c9b97 /system/lib/libart.so (art::DumpNativeStack(std::__1::basic_ostream<char, std::__1::char_traits<char> >&, int, char const*, art::mirror::ArtMethod*)+135) 
    [art] native: #03 pc 0038f2c2 /system/lib/libart.so (art::Thread::DumpStack(std::__1::basic_ostream<char, std::__1::char_traits<char> >&) const+290) 
    [art] native: #04 pc 00395bdb /system/lib/libart.so (art::Thread::ThrowOutOfMemoryError(char const*)+459) 
    [art] native: #05 pc 001f1efb /system/lib/libart.so (art::gc::Heap::ThrowOutOfMemoryError(art::Thread*, unsigned int, art::gc::AllocatorType)+1243) 
    [art] native: #06 pc 001f5ba5 /system/lib/libart.so (art::gc::Heap::AllocateInternalWithGc(art::Thread*, art::gc::AllocatorType, unsigned int, unsigned int*, unsigned int*, art::mirror::Class**)+2773) 
    [art] native: #07 pc 0017e1bb /system/lib/libart.so (art::mirror::Class::AllocObject(art::Thread*)+1275) 
    [art] native: #08 pc 00394dd4 /system/lib/libart.so (art::Thread::ThrowNewWrappedException(art::ThrowLocation const&, char const*, char const*)+820) 
    [art] native: #09 pc 00395c82 /system/lib/libart.so (art::Thread::ThrowOutOfMemoryError(char const*)+626) 
    [art] native: #10 pc 001f1efb /system/lib/libart.so (art::gc::Heap::ThrowOutOfMemoryError(art::Thread*, unsigned int, art::gc::AllocatorType)+1243) 
    [art] native: #11 pc 001f5ba5 /system/lib/libart.so (art::gc::Heap::AllocateInternalWithGc(art::Thread*, art::gc::AllocatorType, unsigned int, unsigned int*, unsigned int*, art::mirror::Class**)+2773) 
    [art] native: #12 pc 0031eed3 /system/lib/libart.so (art::mirror::String::Alloc(art::Thread*, int)+1955) 
    [art] native: #13 pc 0031f39d /system/lib/libart.so (art::mirror::String::AllocFromUtf16(art::Thread*, int, unsigned short const*, int)+45) 
    [art] native: #14 pc 002cb4cb /system/lib/libart.so (art::JNI::NewString(_JNIEnv*, unsigned short const*, int)+363) 
    [art] native: #15 pc 0010ec4d /system/lib/libart.so (art::CheckJNI::NewString(_JNIEnv*, unsigned short const*, int)+125) 
    [art] native: #16 pc 00005eb7 (???) 
    [art] native: #17 pc 000048a2 (???) 
    [art] native: #18 pc 00004107 (???) 
    [art] native: #19 pc 00003c8f (???) 
    [art] native: #20 pc 00003b77 (???) 
    [art] native: #21 pc 00007bd7 (???) 
    [art] native: #22 pc 000079fb (???) 
    [art] native: #23 pc 0000751b (???) 
    [art] native: #24 pc 0000724d (???) 
    [art] native: #25 pc 00007354 (???) 
    [art] native: #26 pc 0002a834 /data/app/Mono.Android.DebugRuntime-1/lib/x86/libmonosgen-32bit-2.0.so (???) 
    [art] native: #27 pc 001b22cb /data/app/Mono.Android.DebugRuntime-1/lib/x86/libmonosgen-32bit-2.0.so (mono_runtime_invoke+75) 
    [art] native: #28 pc 000e19bc /data/app/Mono.Android.DebugRuntime-1/lib/x86/libmonosgen-32bit-2.0.so (???) 
    [art] native: #29 pc 000e2328 /data/app/Mono.Android.DebugRuntime-1/lib/x86/libmonosgen-32bit-2.0.so (???) 
    [art] native: #30 pc 000e24aa /data/app/Mono.Android.DebugRuntime-1/lib/x86/libmonosgen-32bit-2.0.so (???) 
    [art] native: #31 pc 000e24aa /data/app/Mono.Android.DebugRuntime-1/lib/x86/libmonosgen-32bit-2.0.so (???) 
    [art] native: #32 pc 000e24aa /data/app/Mono.Android.DebugRuntime-1/lib/x86/libmonosgen-32bit-2.0.so (???) 
    [art] native: #33 pc 000e24aa /data/app/Mono.Android.DebugRuntime-1/lib/x86/libmonosgen-32bit-2.0.so (???) 
    [art] native: #34 pc 000e24aa /data/app/Mono.Android.DebugRuntime-1/lib/x86/libmonosgen-32bit-2.0.so (???) 
    [art] native: #35 pc 000e24aa /data/app/Mono.Android.DebugRuntime-1/lib/x86/libmonosgen-32bit-2.0.so (???) 
    [art] native: #36 pc 000e34f9 /data/app/Mono.Android.DebugRuntime-1/lib/x86/libmonosgen-32bit-2.0.so (???) 
    [art] native: #37 pc 000f0000 /data/app/Mono.Android.DebugRuntime-1/lib/x86/libmonosgen-32bit-2.0.so (???) 
    [art] native: #38 pc 00007023 (???) 
    [art] native: #39 pc 00006fc7 (???) 
    [art] native: #40 pc 0003134b (???) 
    [art] native: #41 pc 0000df1f (???) 
    [art] native: #42 pc 000ad117 /data/dalvik-cache/x86/[email protected]@[email protected]@classes.dex (Java_md51390a9bb27ae81984ed2b5a51b13bec9_PostsListViewAdapter_n_1getView__ILandroid_view_View_2Landroid_view_ViewGroup_2+187) 
    [art] at md51390a9bb27ae81984ed2b5a51b13bec9.PostsListViewAdapter.n_getView(Native method) 
    [art] at md51390a9bb27ae81984ed2b5a51b13bec9.PostsListViewAdapter.getView(PostsListViewAdapter.java:46) 
    [art] at android.widget.AbsListView.obtainView(AbsListView.java:2347) 
    [art] at android.widget.ListView.makeAndAddView(ListView.java:1864) 
    [art] at android.widget.ListView.fillUp(ListView.java:732) 
    [art] at android.widget.ListView.fillGap(ListView.java:671) 
    [art] at android.widget.AbsListView.trackMotionScroll(AbsListView.java:4991) 
    [art] at android.widget.AbsListView$FlingRunnable.run(AbsListView.java:4539) 
    [art] at android.view.Choreographer$CallbackRecord.run(Choreographer.java:767) 
    [art] at android.view.Choreographer.doCallbacks(Choreographer.java:580) 
    [art] at android.view.Choreographer.doFrame(Choreographer.java:549) 
    [art] at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:753) 
    [art] at android.os.Handler.handleCallback(Handler.java:739) 
    [art] at android.os.Handler.dispatchMessage(Handler.java:95) 
    [art] at android.os.Looper.loop(Looper.java:135) 
    [art] at android.app.ActivityThread.main(ActivityThread.java:5254) 
    [art] at java.lang.reflect.Method.invoke!(Native method) 
    [art] at java.lang.reflect.Method.invoke(Method.java:372) 
    [art] at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:903) 
    [art] at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:698) 
    [art] Clamp target GC heap from 111MB to 96MB 
    [art] Alloc partial concurrent mark sweep GC freed 0(0B) AllocSpace objects, 0(0B) LOS objects, 0% free, 95MB/96MB, paused 1.288ms total 11.770ms 
    [art] Clamp target GC heap from 111MB to 96MB 
    [art] Alloc concurrent mark sweep GC freed 0(0B) AllocSpace objects, 0(0B) LOS objects, 0% free, 95MB/96MB, paused 1.475ms total 18.088ms 
    [art] Forcing collection of SoftReferences for 52B allocation 
    [art] Clamp target GC heap from 111MB to 96MB 
    [art] Alloc concurrent mark sweep GC freed 0(0B) AllocSpace objects, 0(0B) LOS objects, 0% free, 95MB/96MB, paused 881us total 16.762ms 
    [art] Throwing OutOfMemoryError "Failed to allocate a 52 byte allocation with 16 free bytes and 16B until OOM" 
    [art] Clamp target GC heap from 111MB to 96MB 
    [art] Alloc partial concurrent mark sweep GC freed 0(0B) AllocSpace objects, 0(0B) LOS objects, 0% free, 95MB/96MB, paused 10.729ms total 22.730ms 
    [art] Clamp target GC heap from 111MB to 96MB 
    [art] Alloc concurrent mark sweep GC freed 0(0B) AllocSpace objects, 0(0B) LOS objects, 0% free, 95MB/96MB, paused 650us total 47.875ms 
    [art] Forcing collection of SoftReferences for 28B allocation 
    [art] Clamp target GC heap from 111MB to 96MB 
    [art] Alloc concurrent mark sweep GC freed 0(0B) AllocSpace objects, 0(0B) LOS objects, 0% free, 95MB/96MB, paused 1.204ms total 23.964ms 
    [art] Throwing OutOfMemoryError "Failed to allocate a 28 byte allocation with 16 free bytes and 16B until OOM" (recursive case) 
    [art] "main" prio=5 tid=1 Runnable 
    [art] | group="main" sCount=0 dsCount=0 obj=0x739e6000 self=0xf3c25800 
    [art] | sysTid=16583 nice=-6 cgrp=default sched=0/0 handle=0xf7711ea0 
    [art] | state=R schedstat=(52007888965 3621142086 26132) utm=3455 stm=1744 core=3 HZ=100 
    [art] | stack=0xff04c000-0xff04e000 stackSize=8MB 
    [art] | held mutexes= "mutator lock"(shared held) 
    [art] native: #00 pc 00005d03 /system/lib/libbacktrace_libc++.so (UnwindCurrent::Unwind(unsigned int, ucontext*)+83) 
    [art] native: #01 pc 00003051 /system/lib/libbacktrace_libc++.so (Backtrace::Unwind(unsigned int, ucontext*)+33) 
    [art] native: #02 pc 003c9b97 /system/lib/libart.so (art::DumpNativeStack(std::__1::basic_ostream<char, std::__1::char_traits<char> >&, int, char const*, art::mirror::ArtMethod*)+135) 
    [art] native: #03 pc 0038f2c2 /system/lib/libart.so (art::Thread::DumpStack(std::__1::basic_ostream<char, std::__1::char_traits<char> >&) const+290) 
    [art] native: #04 pc 00395bdb /system/lib/libart.so (art::Thread::ThrowOutOfMemoryError(char const*)+459) 
    [art] native: #05 pc 001f1efb /system/lib/libart.so (art::gc::Heap::ThrowOutOfMemoryError(art::Thread*, unsigned int, art::gc::AllocatorType)+1243) 
    [art] native: #06 pc 001f5ba5 /system/lib/libart.so (art::gc::Heap::AllocateInternalWithGc(art::Thread*, art::gc::AllocatorType, unsigned int, unsigned int*, unsigned int*, art::mirror::Class**)+2773) 
    [art] native: #07 pc 0017e1bb /system/lib/libart.so (art::mirror::Class::AllocObject(art::Thread*)+1275) 
    [art] native: #08 pc 00394dd4 /system/lib/libart.so (art::Thread::ThrowNewWrappedException(art::ThrowLocation const&, char const*, char const*)+820) 
    [art] native: #09 pc 00395c82 /system/lib/libart.so (art::Thread::ThrowOutOfMemoryError(char const*)+626) 
    [art] native: #10 pc 001f1efb /system/lib/libart.so (art::gc::Heap::ThrowOutOfMemoryError(art::Thread*, unsigned int, art::gc::AllocatorType)+1243) 
    [art] native: #11 pc 001f5ba5 /system/lib/libart.so (art::gc::Heap::AllocateInternalWithGc(art::Thread*, art::gc::AllocatorType, unsigned int, unsigned int*, unsigned int*, art::mirror::Class**)+2773) 
    [art] native: #12 pc 0031eed3 /system/lib/libart.so (art::mirror::String::Alloc(art::Thread*, int)+1955) 
    [art] native: #13 pc 0031f39d /system/lib/libart.so (art::mirror::String::AllocFromUtf16(art::Thread*, int, unsigned short const*, int)+45) 
    [art] native: #14 pc 002cb4cb /system/lib/libart.so (art::JNI::NewString(_JNIEnv*, unsigned short const*, int)+363) 
    [art] native: #15 pc 0010ec4d /system/lib/libart.so (art::CheckJNI::NewString(_JNIEnv*, unsigned short const*, int)+125) 
    [art] native: #16 pc 00005eb7 (???) 
    [art] native: #17 pc 000048a2 (???) 
    [art] native: #18 pc 00004107 (???) 
    [art] native: #19 pc 00003c8f (???) 
    [art] native: #20 pc 00003b77 (???) 
    [art] native: #21 pc 00007bd7 (???) 
    [art] native: #22 pc 000079fb (???) 
    [art] native: #23 pc 0000751b (???) 
    [art] native: #24 pc 00007e74 (???) 
    [art] native: #25 pc 0002a834 /data/app/Mono.Android.DebugRuntime-1/lib/x86/libmonosgen-32bit-2.0.so (???) 
    [art] native: #26 pc 001b22cb /data/app/Mono.Android.DebugRuntime-1/lib/x86/libmonosgen-32bit-2.0.so (mono_runtime_invoke+75) 
    [art] native: #27 pc 000e19bc /data/app/Mono.Android.DebugRuntime-1/lib/x86/libmonosgen-32bit-2.0.so (???) 
    [art] native: #28 pc 000e2328 /data/app/Mono.Android.DebugRuntime-1/lib/x86/libmonosgen-32bit-2.0.so (???) 
    [art] native: #29 pc 000e24aa /data/app/Mono.Android.DebugRuntime-1/lib/x86/libmonosgen-32bit-2.0.so (???) 
    [art] native: #30 pc 000e24aa /data/app/Mono.Android.DebugRuntime-1/lib/x86/libmonosgen-32bit-2.0.so (???) 
    [art] native: #31 pc 000e24aa /data/app/Mono.Android.DebugRuntime-1/lib/x86/libmonosgen-32bit-2.0.so (???) 
    [art] native: #32 pc 000e24aa /data/app/Mono.Android.DebugRuntime-1/lib/x86/libmonosgen-32bit-2.0.so (???) 
    [art] native: #33 pc 000e24aa /data/app/Mono.Android.DebugRuntime-1/lib/x86/libmonosgen-32bit-2.0.so (???) 
    [art] native: #34 pc 000e24aa /data/app/Mono.Android.DebugRuntime-1/lib/x86/libmonosgen-32bit-2.0.so (???) 
    [art] native: #35 pc 000e24aa /data/app/Mono.Android.DebugRuntime-1/lib/x86/libmonosgen-32bit-2.0.so (???) 
    [art] native: #36 pc 000e24aa /data/app/Mono.Android.DebugRuntime-1/lib/x86/libmonosgen-32bit-2.0.so (???) 
    [art] native: #37 pc 000e24aa /data/app/Mono.Android.DebugRuntime-1/lib/x86/libmonosgen-32bit-2.0.so (???) 
    [art] native: #38 pc 000e24aa /data/app/Mono.Android.DebugRuntime-1/lib/x86/libmonosgen-32bit-2.0.so (???) 
    [art] native: #39 pc 000e34f9 /data/app/Mono.Android.DebugRuntime-1/lib/x86/libmonosgen-32bit-2.0.so (???) 
    [art] native: #40 pc 000f0000 /data/app/Mono.Android.DebugRuntime-1/lib/x86/libmonosgen-32bit-2.0.so (???) 
    [art] native: #41 pc 00007023 (???) 
    [art] native: #42 pc 00006fc7 (???) 
    [art] native: #43 pc 0003134b (???) 
    [art] native: #44 pc 0000df1f (???) 
    [art] native: #45 pc 000ad117 /data/dalvik-cache/x86/[email protected]@[email protected]@classes.dex (Java_md51390a9bb27ae81984ed2b5a51b13bec9_PostsListViewAdapter_n_1getView__ILandroid_view_View_2Landroid_view_ViewGroup_2+187) 
    [art] at md51390a9bb27ae81984ed2b5a51b13bec9.PostsListViewAdapter.n_getView(Native method) 
    [art] at md51390a9bb27ae81984ed2b5a51b13bec9.PostsListViewAdapter.getView(PostsListViewAdapter.java:46) 
    [art] at android.widget.AbsListView.obtainView(AbsListView.java:2347) 
    [art] at android.widget.ListView.makeAndAddView(ListView.java:1864) 
    [art] at android.widget.ListView.fillUp(ListView.java:732) 
    [art] at android.widget.ListView.fillGap(ListView.java:671) 
    [art] at android.widget.AbsListView.trackMotionScroll(AbsListView.java:4991) 
    [art] at android.widget.AbsListView$FlingRunnable.run(AbsListView.java:4539) 
    [art] at android.view.Choreographer$CallbackRecord.run(Choreographer.java:767) 
    [art] at android.view.Choreographer.doCallbacks(Choreographer.java:580) 
    [art] at android.view.Choreographer.doFrame(Choreographer.java:549) 
    [art] at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:753) 
    [art] at android.os.Handler.handleCallback(Handler.java:739) 
    [art] at android.os.Handler.dispatchMessage(Handler.java:95) 
    [art] at android.os.Looper.loop(Looper.java:135) 
    [art] at android.app.ActivityThread.main(ActivityThread.java:5254) 
    [art] at java.lang.reflect.Method.invoke!(Native method) 
    [art] at java.lang.reflect.Method.invoke(Method.java:372) 
    [art] at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:903) 
    [art] at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:698) 
    Thread finished: <Thread Pool> #14 
    [Mono] [0xeecaef80] worker finishing 
    Thread finished: <Thread Pool> #21 
    [Mono] [0xd92e8500] worker finishing 
    Thread finished: <Thread Pool> #19 
    [Mono] [0xd92e8280] worker finishing 
    Thread finished: <Thread Pool> #23 
    Thread finished: <Thread Pool> #9 
    [Mono] [0xdace7600] worker finishing

enter image description here

public async Task SetImage (Activity activity, ImageView view, string url, string imagesDirectory) 
{ 
    Bitmap bitmap = (Bitmap)Get (url); 
    if (bitmap == null) { 
     string file = System.IO.Path.Combine (imagesDirectory, Helper.ImageNameFromUrl(url)); 
     if (System.IO.File.Exists (file)) { 
      BitmapFactory.Options options = new BitmapFactory.Options(); 
      options.InPreferredConfig = Bitmap.Config.Argb8888; 
      bitmap = BitmapFactory.DecodeFile (file, options); 
     } else { 
      bitmap = await WebWorker.DownloadImage (url); 
      SdWorker.SaveBitmap (bitmap, file); 
     } 
     Console.WriteLine ("no cache for item"); 
     Put (url, bitmap); 
    } else { 
     Console.WriteLine (url + " fetched from cache"); 
    } 

    activity.RunOnUiThread (() => { 
     view.SetImageBitmap (bitmap); 
    }); 
}

источник

2016-04-05 bart

+0

Насколько велики загруженные изображения? Если они слишком большие, вам нужно сделать дополнительную работу –

+0

@ Sven-Michael Stübe, около 130x97 пикселей. Я не думаю, что это проблема, потому что я использую кеш LRU. – bart

+0

130x97 Размер или размер фактического файла изображения. Какую реализацию кэша изображений вы используете? Что-то собственное или библиотека? –

ответ

1

Сначала я бы посмотреть в реализации шаблона ViewHolder. Вы можете прочитать больше об этом здесь https://blog.xamarin.com/creating-highly-performant-smooth-scrolling-android-listviews/ В основном это помогает ускорить ваш ListView так за счет многократного использования клеток в вашем ListView

Как только это будет сделано, я бы удалить любые операции асинхронное с вашего GetView. GetView вызывается каждый раз, когда ячейка станет видимой. Таким образом, любые вычисления тяжелых действий в потоке пользовательского интерфейса здесь замедлят работу.

И наконец, я попытался вручную удалить все изображения. Пробираясь через детей.

public override View GetView (int position, View convertView, ViewGroup parent) 
{ 
    MyViewHolder holder; 
    var view = convertView; 

    if(view != null) 
    holder = view.Tag as MyViewHolder; 


    if (holder == null) { 
    holder = new MyViewHolder(); 
    view = LayoutInflater.From (_context).Inflate (Resource.Layout.PostsListItem, null); 
    holder.MediaLinear = view.FindViewById<LinearLayout> (Resource.Id.post_media); 
    view.Tag = holder; 
    } 

    LoadViewHolderImages(holder); 

    return view; 
} 

async Task LoadViewHolderImages(MyViewHolder holder) 
{ 
    CleanupImageViewHolder(holder); 
    var ats = await DBWorker.Instance.Connection.Table<Core.Local.Attachment>().Where (...).ToListAsync(); 
    foreach (var att in ats { 
     var im = new ImageView (_context); //exception here 
     await _memoryCache.SetImage (_context, im, att.url, MainActivity.TempFolder); 
     mediaLinear.AddView (im); 
    } 
} 


void CleanupImageViewHolder(MyViewHolder holder) 
{ 
    // Lets Manually dispose of all children images 
    for (int i = 0; i < holder.MediaLinear.ChildCount; i++) { 
     var view = holder.MediaLinear.GetChildAt (i) as ImageView; 
     if (view != null) { 
      view.Dispose(); 
     } 
    } 
    holder.MediaLinear.RemoveAllViewsInLayout(); 
}

источник

2016-04-05 19:52:03

+0

Я быстро попробовал ваше решение с ручным управлением детьми LinearLayout в демонстрационном проекте и, похоже, работает. Я наблюдал за размером кучи в мониторе устройства Android и видел, что размер кучи иногда уменьшается (до того, как ваше решение только увеличилось). Я попробую ваше решение по рабочему проекту, а затем снова опубликует комментарий. Большое спасибо) – bart

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