CaseMapper.toLowerCase导致App崩溃

时间：2014-02-16 18:17:18

标签： android android-contentresolver

我最近有很多我的应用程序崩溃，我不明白这个问题。 logcat输出是：

02-16 18:47:44.839: D/dalvikvm(7264): JIT unchain all for threadid=1
02-16 18:47:45.589: W/dalvikvm(7264): threadid=14: spin on suspend #1 threadid=1 (pcf=0)
02-16 18:47:46.339: W/dalvikvm(7264): threadid=14: spin on suspend #2 threadid=1 (pcf=0)
02-16 18:47:46.340: I/dalvikvm(7264): "Thread-2069" prio=5 tid=14 RUNNABLE JIT
02-16 18:47:46.340: I/dalvikvm(7264):   | group="main" sCount=0 dsCount=0 obj=0x41f13920 self=0x5f259a38
02-16 18:47:46.340: I/dalvikvm(7264):   | sysTid=7715 nice=0 sched=0/0 cgrp=apps handle=1596300944
02-16 18:47:46.340: I/dalvikvm(7264):   | state=R schedstat=( 0 0 0 ) utm=7 stm=4 core=1
02-16 18:47:46.340: I/dalvikvm(7264):   at java.lang.CaseMapper.toLowerCase(CaseMapper.java:~67)
02-16 18:47:46.340: I/dalvikvm(7264):   at java.lang.String.toLowerCase(String.java:1496)
02-16 18:47:46.340: I/dalvikvm(7264):   at de.malaka.player.utils.DBUtils.getTracksFromFolderWithoutSubfolder(DBUtils.java:384)
02-16 18:47:46.340: I/dalvikvm(7264):   at de.malaka.player.fragment.FolderFragment$9.run(FolderFragment.java:615)
02-16 18:47:46.340: I/dalvikvm(7264): "main" prio=5 tid=1 RUNNABLE JIT
02-16 18:47:46.340: I/dalvikvm(7264):   | group="main" sCount=1 dsCount=0 obj=0x41619e40 self=0x4153a828
02-16 18:47:46.340: I/dalvikvm(7264):   | sysTid=7264 nice=0 sched=0/0 cgrp=apps handle=1073856852
02-16 18:47:46.340: I/dalvikvm(7264):   | state=R schedstat=( 0 0 0 ) utm=1482 stm=147 core=0
02-16 18:47:46.340: I/dalvikvm(7264):   at de.malaka.player.fragment.FolderFragment.finishFillPath(FolderFragment.java:~676)
02-16 18:47:46.340: I/dalvikvm(7264):   at de.malaka.player.fragment.FolderFragment.onBackClicked(FolderFragment.java:517)
02-16 18:47:46.340: I/dalvikvm(7264):   at de.malaka.player.MainActivity.onBackPressed(MainActivity.java:736)
02-16 18:47:46.340: I/dalvikvm(7264):   at android.app.Activity.onKeyUp(Activity.java:2201)
02-16 18:47:46.340: I/dalvikvm(7264):   at android.view.KeyEvent.dispatch(KeyEvent.java:2664)
02-16 18:47:46.340: I/dalvikvm(7264):   at android.app.Activity.dispatchKeyEvent(Activity.java:2431)
02-16 18:47:46.340: I/dalvikvm(7264):   at android.support.v7.app.ActionBarActivityDelegateICS$WindowCallbackWrapper.dispatchKeyEvent(ActionBarActivityDelegateICS.java:245)

我已经获得了超过100行的输出，然后最后我得到了这个logcat输出：

02-16 18:47:52.415: I/dalvikvm(7264): "Binder_2" prio=5 tid=10 NATIVE
02-16 18:47:52.415: I/dalvikvm(7264):   | group="main" sCount=1 dsCount=0 obj=0x41eecd98 self=0x5eca6008
02-16 18:47:52.415: I/dalvikvm(7264):   | sysTid=7276 nice=0 sched=0/0 cgrp=apps handle=1533152376
02-16 18:47:52.415: I/dalvikvm(7264):   | state=S schedstat=( 0 0 0 ) utm=0 stm=0 core=0
02-16 18:47:52.418: I/dalvikvm(7264):   #00  pc 00020660  /system/lib/libc.so (__ioctl+8)
02-16 18:47:52.418: I/dalvikvm(7264):   #01  pc 0002cdb7  /system/lib/libc.so (ioctl+14)
02-16 18:47:52.418: I/dalvikvm(7264):   #02  pc 0001d375  /system/lib/libbinder.so (android::IPCThreadState::talkWithDriver(bool)+140)
02-16 18:47:52.418: I/dalvikvm(7264):   #03  pc 0001da7f  /system/lib/libbinder.so (android::IPCThreadState::getAndExecuteCommand()+6)
02-16 18:47:52.418: I/dalvikvm(7264):   #04  pc 0001db15  /system/lib/libbinder.so (android::IPCThreadState::joinThreadPool(bool)+48)
02-16 18:47:52.418: I/dalvikvm(7264):   #05  pc 00021939  /system/lib/libbinder.so
02-16 18:47:52.418: I/dalvikvm(7264):   #06  pc 0000ea75  /system/lib/libutils.so (android::Thread::_threadLoop(void*)+216)
02-16 18:47:52.418: I/dalvikvm(7264):   #07  pc 0004d091  /system/lib/libandroid_runtime.so (android::AndroidRuntime::javaThreadShell(void*)+68)
02-16 18:47:52.418: I/dalvikvm(7264):   #08  pc 0000e59d  /system/lib/libutils.so
02-16 18:47:52.418: I/dalvikvm(7264):   #09  pc 0000d240  /system/lib/libc.so (__thread_entry+72)
02-16 18:47:52.418: I/dalvikvm(7264):   #10  pc 0000d3d8  /system/lib/libc.so (pthread_create+240)
02-16 18:47:52.418: I/dalvikvm(7264):   at dalvik.system.NativeStart.run(Native Method)
02-16 18:47:52.418: I/dalvikvm(7264): "Binder_1" prio=5 tid=9 NATIVE
02-16 18:47:52.418: I/dalvikvm(7264):   | group="main" sCount=1 dsCount=0 obj=0x41eecbb8 self=0x5b620250
02-16 18:47:52.418: I/dalvikvm(7264):   | sysTid=7275 nice=0 sched=0/0 cgrp=apps handle=1533149192
02-16 18:47:52.418: I/dalvikvm(7264):   | state=S schedstat=( 0 0 0 ) utm=0 stm=0 core=0
02-16 18:47:52.420: I/dalvikvm(7264):   #00  pc 00020660  /system/lib/libc.so (__ioctl+8)
02-16 18:47:52.420: I/dalvikvm(7264):   #01  pc 0002cdb7  /system/lib/libc.so (ioctl+14)
02-16 18:47:52.420: I/dalvikvm(7264):   #02  pc 0001d375  /system/lib/libbinder.so (android::IPCThreadState::talkWithDriver(bool)+140)
02-16 18:47:52.420: I/dalvikvm(7264):   #03  pc 0001da7f  /system/lib/libbinder.so (android::IPCThreadState::getAndExecuteCommand()+6)
02-16 18:47:52.420: I/dalvikvm(7264):   #04  pc 0001db15  /system/lib/libbinder.so (android::IPCThreadState::joinThreadPool(bool)+48)
02-16 18:47:52.420: I/dalvikvm(7264):   #05  pc 00021939  /system/lib/libbinder.so
02-16 18:47:52.421: I/dalvikvm(7264):   #06  pc 0000ea75  /system/lib/libutils.so (android::Thread::_threadLoop(void*)+216)
02-16 18:47:52.421: I/dalvikvm(7264):   #07  pc 0004d091  /system/lib/libandroid_runtime.so (android::AndroidRuntime::javaThreadShell(void*)+68)
02-16 18:47:52.421: I/dalvikvm(7264):   #08  pc 0000e59d  /system/lib/libutils.so
02-16 18:47:52.421: I/dalvikvm(7264):   #09  pc 0000d240  /system/lib/libc.so (__thread_entry+72)
02-16 18:47:52.421: I/dalvikvm(7264):   #10  pc 0000d3d8  /system/lib/libc.so (pthread_create+240)
02-16 18:47:52.421: I/dalvikvm(7264):   at dalvik.system.NativeStart.run(Native Method)
02-16 18:47:52.421: I/dalvikvm(7264): "FinalizerWatchdogDaemon" daemon prio=5 tid=8 WAIT
02-16 18:47:52.421: I/dalvikvm(7264):   | group="system" sCount=1 dsCount=0 obj=0x41ee99b8 self=0x5b51f330
02-16 18:47:52.421: I/dalvikvm(7264):   | sysTid=7274 nice=0 sched=0/0 cgrp=apps handle=1532098440
02-16 18:47:52.421: I/dalvikvm(7264):   | state=S schedstat=( 0 0 0 ) utm=0 stm=0 core=0
02-16 18:47:52.421: I/dalvikvm(7264):   at java.lang.Object.wait(Native Method)
02-16 18:47:52.421: I/dalvikvm(7264):   - waiting on <0x416234e8> (a java.lang.Daemons$FinalizerWatchdogDaemon)
02-16 18:47:52.421: I/dalvikvm(7264):   at java.lang.Object.wait(Object.java:364)
02-16 18:47:52.421: I/dalvikvm(7264):   at java.lang.Daemons$FinalizerWatchdogDaemon.waitForObject(Daemons.java:230)
02-16 18:47:52.421: I/dalvikvm(7264):   at java.lang.Daemons$FinalizerWatchdogDaemon.run(Daemons.java:207)
02-16 18:47:52.421: I/dalvikvm(7264):   at java.lang.Thread.run(Thread.java:841)
02-16 18:47:52.421: I/dalvikvm(7264): "FinalizerDaemon" daemon prio=5 tid=7 WAIT
02-16 18:47:52.421: I/dalvikvm(7264):   | group="system" sCount=1 dsCount=0 obj=0x41ee9808 self=0x5e3e58c0
02-16 18:47:52.421: I/dalvikvm(7264):   | sysTid=7273 nice=0 sched=0/0 cgrp=apps handle=1581145368
02-16 18:47:52.421: I/dalvikvm(7264):   | state=S schedstat=( 0 0 0 ) utm=7 stm=1 core=1
02-16 18:47:52.421: I/dalvikvm(7264):   at java.lang.Object.wait(Native Method)
02-16 18:47:52.421: I/dalvikvm(7264):   - waiting on <0x4160e7d8> (a java.lang.ref.ReferenceQueue)
02-16 18:47:52.421: I/dalvikvm(7264):   at java.lang.Object.wait(Object.java:401)
02-16 18:47:52.422: I/dalvikvm(7264):   at java.lang.ref.ReferenceQueue.remove(ReferenceQueue.java:102)
02-16 18:47:52.422: I/dalvikvm(7264):   at java.lang.ref.ReferenceQueue.remove(ReferenceQueue.java:73)
02-16 18:47:52.422: I/dalvikvm(7264):   at java.lang.Daemons$FinalizerDaemon.run(Daemons.java:170)
02-16 18:47:52.422: I/dalvikvm(7264):   at java.lang.Thread.run(Thread.java:841)
02-16 18:47:52.422: I/dalvikvm(7264): "ReferenceQueueDaemon" daemon prio=5 tid=6 WAIT
02-16 18:47:52.422: I/dalvikvm(7264):   | group="system" sCount=1 dsCount=0 obj=0x41ee96a0 self=0x5e3e5018
02-16 18:47:52.422: I/dalvikvm(7264):   | sysTid=7272 nice=0 sched=0/0 cgrp=apps handle=1581143152
02-16 18:47:52.422: I/dalvikvm(7264):   | state=S schedstat=( 0 0 0 ) utm=0 stm=0 core=0
02-16 18:47:52.422: I/dalvikvm(7264):   at java.lang.Object.wait(Native Method)
02-16 18:47:52.422: I/dalvikvm(7264):   - waiting on <0x4160e700> 
02-16 18:47:52.422: I/dalvikvm(7264):   at java.lang.Object.wait(Object.java:364)
02-16 18:47:52.422: I/dalvikvm(7264):   at java.lang.Daemons$ReferenceQueueDaemon.run(Daemons.java:130)
02-16 18:47:52.422: I/dalvikvm(7264):   at java.lang.Thread.run(Thread.java:841)
02-16 18:47:52.422: I/dalvikvm(7264): "Compiler" daemon prio=5 tid=5 VMWAIT
02-16 18:47:52.422: I/dalvikvm(7264):   | group="system" sCount=1 dsCount=0 obj=0x41ee95b0 self=0x5e3e49b8
02-16 18:47:52.422: I/dalvikvm(7264):   | sysTid=7271 nice=0 sched=0/0 cgrp=apps handle=1581139824
02-16 18:47:52.422: I/dalvikvm(7264):   | state=S schedstat=( 0 0 0 ) utm=12 stm=7 core=0
02-16 18:47:52.423: I/dalvikvm(7264):   #00  pc 000219dc  /system/lib/libc.so (__futex_syscall3+8)
02-16 18:47:52.423: I/dalvikvm(7264):   #01  pc 0000ef94  /system/lib/libc.so (__pthread_cond_timedwait_relative+48)
02-16 18:47:52.423: I/dalvikvm(7264):   #02  pc 0000effc  /system/lib/libc.so (__pthread_cond_timedwait+64)
02-16 18:47:52.423: I/dalvikvm(7264):   #03  pc 00076e73  /system/lib/libdvm.so
02-16 18:47:52.423: I/dalvikvm(7264):   #04  pc 00057841  /system/lib/libdvm.so
02-16 18:47:52.423: I/dalvikvm(7264):   #05  pc 0000d240  /system/lib/libc.so (__thread_entry+72)
02-16 18:47:52.423: I/dalvikvm(7264):   #06  pc 0000d3d8  /system/lib/libc.so (pthread_create+240)
02-16 18:47:52.423: I/dalvikvm(7264):   at dalvik.system.NativeStart.run(Native Method)
02-16 18:47:52.423: I/dalvikvm(7264): "JDWP" daemon prio=5 tid=4 VMWAIT
02-16 18:47:52.423: I/dalvikvm(7264):   | group="system" sCount=1 dsCount=0 obj=0x41ee94c8 self=0x5e3e4110
02-16 18:47:52.423: I/dalvikvm(7264):   | sysTid=7270 nice=0 sched=0/0 cgrp=apps handle=1096844008
02-16 18:47:52.423: I/dalvikvm(7264):   | state=S schedstat=( 0 0 0 ) utm=0 stm=0 core=2
02-16 18:47:52.424: I/dalvikvm(7264):   #00  pc 000207b0  /system/lib/libc.so (select+20)
02-16 18:47:52.424: I/dalvikvm(7264):   #01  pc 0006437b  /system/lib/libdvm.so
02-16 18:47:52.424: I/dalvikvm(7264):   #02  pc 00066ee1  /system/lib/libdvm.so
02-16 18:47:52.424: I/dalvikvm(7264):   #03  pc 00057841  /system/lib/libdvm.so
02-16 18:47:52.424: I/dalvikvm(7264):   #04  pc 0000d240  /system/lib/libc.so (__thread_entry+72)
02-16 18:47:52.424: I/dalvikvm(7264):   #05  pc 0000d3d8  /system/lib/libc.so (pthread_create+240)
02-16 18:47:52.424: I/dalvikvm(7264):   at dalvik.system.NativeStart.run(Native Method)
02-16 18:47:52.424: I/dalvikvm(7264): "Signal Catcher" daemon prio=5 tid=3 SUSPENDED
02-16 18:47:52.424: I/dalvikvm(7264):   | group="system" sCount=1 dsCount=0 obj=0x41ee93d0 self=0x58572a58
02-16 18:47:52.424: I/dalvikvm(7264):   | sysTid=7269 nice=0 sched=0/0 cgrp=apps handle=1482106896
02-16 18:47:52.424: I/dalvikvm(7264):   | state=S schedstat=( 0 0 0 ) utm=0 stm=0 core=0
02-16 18:47:52.426: I/dalvikvm(7264):   #00  pc 000219dc  /system/lib/libc.so (__futex_syscall3+8)
02-16 18:47:52.426: I/dalvikvm(7264):   #01  pc 0000ef94  /system/lib/libc.so (__pthread_cond_timedwait_relative+48)
02-16 18:47:52.426: I/dalvikvm(7264):   #02  pc 0000effc  /system/lib/libc.so (__pthread_cond_timedwait+64)
02-16 18:47:52.426: I/dalvikvm(7264):   #03  pc 0005658b  /system/lib/libdvm.so
02-16 18:47:52.426: I/dalvikvm(7264):   #04  pc 00056b4d  /system/lib/libdvm.so (dvmChangeStatus(Thread*, ThreadStatus)+34)
02-16 18:47:52.426: I/dalvikvm(7264):   #05  pc 00054cd7  /system/lib/libdvm.so
02-16 18:47:52.426: I/dalvikvm(7264):   #06  pc 00057841  /system/lib/libdvm.so
02-16 18:47:52.426: I/dalvikvm(7264):   #07  pc 0000d240  /system/lib/libc.so (__thread_entry+72)
02-16 18:47:52.426: I/dalvikvm(7264):   #08  pc 0000d3d8  /system/lib/libc.so (pthread_create+240)
02-16 18:47:52.426: I/dalvikvm(7264):   at dalvik.system.NativeStart.run(Native Method)
02-16 18:47:52.426: I/dalvikvm(7264): "GC" daemon prio=5 tid=2 VMWAIT
02-16 18:47:52.426: I/dalvikvm(7264):   | group="system" sCount=1 dsCount=0 obj=0x41ee92f0 self=0x5b64b258
02-16 18:47:52.426: I/dalvikvm(7264):   | sysTid=7268 nice=0 sched=0/0 cgrp=apps handle=1533323936
02-16 18:47:52.426: I/dalvikvm(7264):   | state=S schedstat=( 0 0 0 ) utm=1 stm=9 core=1
02-16 18:47:52.428: I/dalvikvm(7264):   #00  pc 000219dc  /system/lib/libc.so (__futex_syscall3+8)
02-16 18:47:52.428: I/dalvikvm(7264):   #01  pc 0000ef94  /system/lib/libc.so (__pthread_cond_timedwait_relative+48)
02-16 18:47:52.428: I/dalvikvm(7264):   #02  pc 0000effc  /system/lib/libc.so (__pthread_cond_timedwait+64)
02-16 18:47:52.428: I/dalvikvm(7264):   #03  pc 00075837  /system/lib/libdvm.so
02-16 18:47:52.428: I/dalvikvm(7264):   #04  pc 00057841  /system/lib/libdvm.so
02-16 18:47:52.428: I/dalvikvm(7264):   #05  pc 0000d240  /system/lib/libc.so (__thread_entry+72)
02-16 18:47:52.428: I/dalvikvm(7264):   #06  pc 0000d3d8  /system/lib/libc.so (pthread_create+240)
02-16 18:47:52.428: I/dalvikvm(7264):   at dalvik.system.NativeStart.run(Native Method)
02-16 18:47:52.428: I/dalvikvm(7264): NATIVE THREADS:
02-16 18:47:52.428: I/dalvikvm(7264): "GL updater" sysTid=7301 nice=-10 sched=0/0 cgrp=apps
02-16 18:47:52.428: I/dalvikvm(7264):   | state=S schedstat=( 0 0 0 ) utm=2 stm=12 core=0
02-16 18:47:52.428: E/dalvikvm(7264): threadid=14: stuck on threadid=1, giving up
02-16 18:47:52.429: D/dalvikvm(7264): threadid=14: sending two SIGSTKFLTs to threadid=1 (tid=7264) to cause debuggerd dump
02-16 18:47:52.431: A/libc(7264): Fatal signal 16 (SIGSTKFLT) at 0x00001c60 (code=-6), thread 7264 (e.malaka.player)

发生的地方
我正在进行数据库查询以获取子文件夹中的所有轨道，然后检查该文件是否在该特定文件夹中，而不是在具有正则表达式的子文件夹中。这是代码：

public static final String DATA = MediaStore.Audio.Media.DATA;

public static void getTracksFromFolderWithoutSubfolder(
        Context context, File f, ArrayList<TrackInfo> q, 
        int icon) {

    String pattern = Pattern.quote(f.getAbsolutePath().toLowerCase()) + "/[^/]*";
    Cursor mCursor = null;

    String selection = MediaStore.Audio.Media.IS_MUSIC + " != 0 AND " + DATA + " LIKE \"" + f.getAbsolutePath() + "/%\"";
    Uri contentUri = Media.getContentUriForPath(Environment.getExternalStorageDirectory().getPath());
    String projection[] = new String[]{DATA};

    mCursor = context.getContentResolver().query(contentUri, projection, selection, null, DATA);

    String data, fileName[];
    while(mCursor.moveToNext()){

        data = mCursor.getString(0);    
        if(data.toLowerCase().matches(pattern)){ // this is the line the logcat refers to
            fileName = data.split("/");
            q.add(new TrackInfo(fileName[fileName.length-1], null, data, null, -1, icon, false));
        }


    }

    mCursor.close();

}

如果我将File f作为设备上音乐的主文件夹（约1200个音乐文件，包括子文件夹）调用此方法，则似乎只会出现错误。但它并不是每次都会发生。实际上，它在十次通话中大约发生两到三次。

有谁可以告诉我这可能来自哪里？也许我错过了释放一些资源或类似的东西..
我目前正在使用Moto G，Android 4.4

由于

1 个答案:

答案 0 :(得分：0)

所以要关闭这个问题：

组合这些logcat行：
来自第二个输出 

02-16 18:47:52.429: D/dalvikvm(7264): threadid=14: sending two SIGSTKFLTs to threadid=1 (tid=7264) to cause debuggerd dump

来自第一个输出 

02-16 18:47:46.340: I/dalvikvm(7264): "main" prio=5 tid=1 RUNNABLE JIT
02-16 18:47:46.340: I/dalvikvm(7264):   | group="main" sCount=1 dsCount=0 obj=0x41619e40 self=0x4153a828
02-16 18:47:46.340: I/dalvikvm(7264):   | sysTid=7264 nice=0 sched=0/0 cgrp=apps handle=1073856852
02-16 18:47:46.340: I/dalvikvm(7264):   | state=R schedstat=( 0 0 0 ) utm=1482 stm=147 core=0
02-16 18:47:46.340: I/dalvikvm(7264):   at de.malaka.player.fragment.FolderFragment.finishFillPath(FolderFragment.java:~676)

我仔细看了FolderFragment.finishFillPath(FolderFragment.java:~676)。在那里，我找到了一段代码，使UIThread主动等待后台线程完成。我出于调试原因介绍了这一行，忘记将其删除
所以在我的例子中，以下行（ from second output ）：

02-16 18:47:52.428: E/dalvikvm(7264): threadid=14: stuck on threadid=1, giving up

表示UI线程等待太久了。

@Gabe Sechan
谢谢你的帮助

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