我的应用程序是做什么的? 我正在开发的应用程序是一种典型的客户端服务器应用程序,使用 Wifi 与 Windows 服务器通信。该应用程序具有多个活动和重的内存和 CPU 要求,例如 speex 编码/解码的本机调用。
我的问题是什么? 问题是应用程序在正常工作时突然重新启动。有时,在正常工作时突然看到(在 LogCat 中)调用了 Application 类的构造函数(该类扩展了 API 的 Application 类)。这会导致我的应用程序崩溃,因为所有全局数据都存储在应用程序类中。
我已经做了什么? 我想到的第一件事是 Android 可能感觉到低内存,因此终止了我的应用程序,并自动重新启动了它。因此,我实现了应用程序类的 onLowMemory() 方法。但令我惊讶的是,它从未被调用过。
主要问题是什么? 主要问题是 LogCat 上没有任何内容打印
。看起来即使 Android 自身也不知道为什么重新启动了我的已运行应用程序?
可能的原因是什么导致了突然重启?我该如何避免这种情况?
我正在 Galaxy Y 上工作,API 版本为 2.3.6。我的 AndroidManifest.xml 如下:
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="some.package.MyApp"
android:versionCode="1"
android:versionName="1.0" >
<uses-sdk
android:maxSdkVersion="15"
android:minSdkVersion="10"
android:targetSdkVersion="10" />
<uses-permission android:name="android.permission.RECORD_AUDIO" />
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
<uses-permission android:name="android.permission.ACCESS_WIFI_STATE" />
<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="android.permission.CAMERA" />
<uses-permission android:name="android.permission.RECORD_VIDEO" />
<uses-feature android:name="android.hardware.camera" />
<uses-feature android:name="android.hardware.camera.autofocus" />
<application
android:name="some.package.MyApp"
android:icon="@drawable/display_image"
android:label="@string/app_name" >
<activity
android:name="some.package.LoginActivity"
android:configChanges="keyboardHidden|orientation"
android:label="@string/app_name"
android:screenOrientation="user" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<activity
android:name="some.package.BuddyListActivity"
android:configChanges="keyboardHidden|orientation"
android:label="@string/app_name"
android:screenOrientation="user"
android:theme="@android:style/Theme.Black.NoTitleBar" >
<!--
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
-->
</activity>
<activity
android:name="some.package.SessionWindowActivity"
android:configChanges="keyboardHidden|orientation"
android:label="@string/app_name"
android:screenOrientation="user"
android:theme="@android:style/Theme.Black.NoTitleBar" >
<!--
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
-->
</activity>
</application>
</manifest>
编辑 在使用CheckJNI后,我刚刚在LogCat中看到以下输出:
06-26 17:27:30.023: I/remove(24544): Sending Signal : 13 **//App Working fine here**
06-26 17:27:32.148: D/dalvikvm(24544): GC_CONCURRENT freed 446K, 49% free 3384K/6599K, external 1057K/1076K, paused 3ms+4ms
06-26 17:27:39.531: W/dalvikvm(24544): **HeapWorker may be wedged: 7374ms spent** inside LsomePackageName/modules/AudioPlayer;.finalize()V
06-26 17:27:40.023: I/remove(24544): Sending Signal : 13
06-26 17:27:40.218: D/dalvikvm(24544): GC_CONCURRENT freed 479K, 49% free 3383K/6599K, external 1057K/1076K, paused 9ms+5ms
06-26 17:27:42.343: E/RoobrooApp(24670): Application Instance created **//Restarted**
06-26 17:27:42.351: I/ApplicationPackageManager(24670): cscCountry is not German : INS
更新 在进一步实验中,我有意为双精度数组分配了非常大的存储空间。但是出乎意料的是,既没有调用 onLowMemory() 也没有重启应用程序,而是出现了 outOfMemoryException。如果从未调用 onLowMemory(),那为什么会存在呢?还有一个问题是,在重启操作系统后,它已经开始运行 BuddyListActivity 而不是 LoginActivity... 真的需要帮助...
更新2 我刚刚看到以下错误日志,我真的不知道这是什么意思...
06-29 12:07:28.398: W/dalvikvm(19308): ReferenceTable overflow (max=1024)
06-29 12:07:28.398: W/dalvikvm(19308): Last 10 entries in JNI pinned array reference table:
06-29 12:07:28.398: W/dalvikvm(19308): 1014: 0x405b0280 cls=[B (340 bytes)
06-29 12:07:28.398: W/dalvikvm(19308): 1015: 0x405b03d8 cls=[S (660 bytes)
06-29 12:07:28.398: W/dalvikvm(19308): 1016: 0x405d8208 cls=[B (340 bytes)
06-29 12:07:28.398: W/dalvikvm(19308): 1017: 0x405d8360 cls=[S (660 bytes)
06-29 12:07:28.398: W/dalvikvm(19308): 1018: 0x405f8b08 cls=[B (340 bytes)
06-29 12:07:28.398: W/dalvikvm(19308): 1019: 0x405f8c60 cls=[S (660 bytes)
06-29 12:07:28.398: W/dalvikvm(19308): 1020: 0x405f8ef8 cls=[B (340 bytes)
06-29 12:07:28.398: W/dalvikvm(19308): 1021: 0x405ff698 cls=[S (660 bytes)
06-29 12:07:28.398: W/dalvikvm(19308): 1022: 0x405f9050 cls=[B (340 bytes)
06-29 12:07:28.398: W/dalvikvm(19308): 1023: 0x405ff930 cls=[S (660 bytes)
06-29 12:07:28.398: W/dalvikvm(19308): JNI pinned array reference table summary (1024 entries):
06-29 12:07:28.398: W/dalvikvm(19308): 1 of [B 20B
06-29 12:07:28.398: W/dalvikvm(19308): 508 of [B 340B (508 unique)
06-29 12:07:28.398: W/dalvikvm(19308): 3 of [B 348B (3 unique)
06-29 12:07:28.406: W/dalvikvm(19308): 511 of [S 660B (511 unique)
06-29 12:07:28.406: W/dalvikvm(19308): 1 of [S 668B
06-29 12:07:28.406: W/dalvikvm(19308): Memory held directly by tracked refs is 511712 bytes
06-29 12:07:28.406: E/dalvikvm(19308): Failed adding to JNI pinned array ref table (1024 entries)
06-29 12:07:28.406: I/dalvikvm(19308): "Thread-14" prio=5 tid=12 RUNNABLE
06-29 12:07:28.406: I/dalvikvm(19308): | group="main" sCount=0 dsCount=0 obj=0x4050e548 self=0x2240b8
06-29 12:07:28.406: I/dalvikvm(19308): | sysTid=19953 nice=-19 sched=0/0 cgrp=[fopen-error:2] handle=1905240
06-29 12:07:28.406: I/dalvikvm(19308): | schedstat=( 207153329 82244881 1015 )
06-29 12:07:28.406: I/dalvikvm(19308): at some.package.MyApp.speex.SpeexEncoder.encode(Native Method)
06-29 12:07:28.406: I/dalvikvm(19308): at some.package.MyApp.speex.SpeexEncoder.encodeFrame(SpeexEncoder.java:51)
06-29 12:07:28.406: I/dalvikvm(19308): at some.package.MyApp.models.Session.capturedAudioReceived(Session.java:656)
06-29 12:07:28.406: I/dalvikvm(19308): at some.package.MyApp.modules.AudioCapturer.run(AudioCapturer.java:118)
06-29 12:07:28.406: I/dalvikvm(19308): at java.lang.Thread.run(Thread.java:1019)
06-29 12:07:28.406: E/dalvikvm(19308): VM aborting
06-29 12:07:29.726: W/AudioTrack(19308): obtainBuffer() track 0x1d3520 disabled, restarting
06-29 12:07:30.351: W/dalvikvm(19308): threadid=4: spin on suspend #1 threadid=1 (pcf=0)
06-29 12:07:30.898: W/AudioTrack(19308): obtainBuffer() track 0x1d3520 disabled, restarting
06-29 12:07:31.101: W/dalvikvm(19308): threadid=4: spin on suspend #2 threadid=1 (pcf=0)
06-29 12:07:31.101: I/dalvikvm(19308): "Signal Catcher" daemon prio=5 tid=4 RUNNABLE
06-29 12:07:31.101: I/dalvikvm(19308): | group="system" sCount=0 dsCount=0 obj=0x40510490 self=0x159898
06-29 12:07:31.101: I/dalvikvm(19308): | sysTid=19312 nice=0 sched=0/0 cgrp=[fopen-error:2] handle=1575600
06-29 12:07:31.101: I/dalvikvm(19308): | schedstat=( 1556395 4913328 26 )
06-29 12:07:31.101: I/dalvikvm(19308): at dalvik.system.NativeStart.run(Native Method)
06-29 12:07:31.101: I/dalvikvm(19308): "main" prio=5 tid=1 RUNNABLE
06-29 12:07:31.101: I/dalvikvm(19308): | group="main" sCount=1 dsCount=0 obj=0x40022198 self=0xcec8
06-29 12:07:31.101: I/dalvikvm(19308): | sysTid=19308 nice=0 sched=0/0 cgrp=[fopen-error:2] handle=-1345006496
06-29 12:07:31.101: I/dalvikvm(19308): | schedstat=( 5364166234 3306213349 13647 )
06-29 12:07:31.101: I/dalvikvm(19308): at android.media.AudioTrack.native_write_short(Native Method)
06-29 12:07:31.101: I/dalvikvm(19308): at android.media.AudioTrack.write(AudioTrack.java:943)
06-29 12:07:31.101: I/dalvikvm(19308): at some.package.MyApp.modules.AudioPlayer.onPeriodicNotification(AudioPlayer.java:163)
06-29 12:07:31.101: I/dalvikvm(19308): at android.media.AudioTrack$NativeEventHandlerDelegate$1.handleMessage(AudioTrack.java:1084)
06-29 12:07:31.101: I/dalvikvm(19308): at android.os.Handler.dispatchMessage(Handler.java:99)
06-29 12:07:31.101: I/dalvikvm(19308): at android.os.Looper.loop(Looper.java:130)
06-29 12:07:31.101: I/dalvikvm(19308): at android.app.ActivityThread.main(ActivityThread.java:3687)
06-29 12:07:31.101: I/dalvikvm(19308): at java.lang.reflect.Method.invokeNative(Native Method)
06-29 12:07:31.101: I/dalvikvm(19308): at java.lang.reflect.Method.invoke(Method.java:507)
06-29 12:07:31.101: I/dalvikvm(19308): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:867)
06-29 12:07:31.101: I/dalvikvm(19308): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:625)
06-29 12:07:31.101: I/dalvikvm(19308): at dalvik.system.NativeStart.main(Native Method)
06-29 12:07:31.851: W/dalvikvm(19308): threadid=4: spin on suspend #3 threadid=1 (pcf=0)
06-29 12:07:31.851: I/dalvikvm(19308): "Signal Catcher" daemon prio=5 tid=4 RUNNABLE
06-29 12:07:31.851: I/dalvikvm(19308): | group="system" sCount=0 dsCount=0 obj=0x40510490 self=0x159898
06-29 12:07:31.851: I/dalvikvm(19308): | sysTid=19312 nice=0 sched=0/0 cgrp=[fopen-error:2] handle=1575600
06-29 12:07:31.851: I/dalvikvm(19308): | schedstat=( 2868652 6927485 37 )
06-29 12:07:31.851: I/dalvikvm(19308): at dalvik.system.NativeStart.run(Native Method)
06-29 12:07:31.851: I/dalvikvm(19308): "main" prio=5 tid=1 RUNNABLE
06-29 12:07:31.851: I/dalvikvm(19308): | group="main" sCount=1 dsCount=0 obj=0x40022198 self=0xcec8
06-29 12:07:31.851: I/dalvikvm(19308): | sysTid=19308 nice=0 sched=0/0 cgrp=[fopen-error:2] handle=-1345006496
06-29 12:07:31.851: I/dalvikvm(19308): | schedstat=( 5364166234 3306213349 13647 )
06-29 12:07:32.000: I/dalvikvm(19308): at android.media.AudioTrack.native_write_short(Native Method)
06-29 12:07:32.015: I/dalvikvm(19308): at android.media.AudioTrack.write(AudioTrack.java:943)
06-29 12:07:32.031: I/dalvikvm(19308): at some.package.MyApp.modules.AudioPlayer.onPeriodicNotification(AudioPlayer.java:163)
06-29 12:07:32.039: I/dalvikvm(19308): at android.media.AudioTrack$NativeEventHandlerDelegate$1.handleMessage(AudioTrack.java:1084)
06-29 12:07:32.054: I/dalvikvm(19308): at android.os.Handler.dispatchMessage(Handler.java:99)
06-29 12:07:32.054: I/dalvikvm(19308): at android.os.Looper.loop(Looper.java:130)
06-29 12:07:32.062: W/AudioTrack(19308): obtainBuffer() track 0x1d3520 disabled, restarting
06-29 12:07:32.070: I/dalvikvm(19308): at android.app.ActivityThread.main(ActivityThread.java:3687)
06-29 12:07:32.093: I/dalvikvm(19308): at java.lang.reflect.Method.invokeNative(Native Method)
06-29 12:07:32.101: I/dalvikvm(19308): at java.lang.reflect.Method.invoke(Method.java:507)
06-29 12:07:32.109: I/dalvikvm(19308): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:867)
06-29 12:07:32.125: I/dalvikvm(19308): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:625)
06-29 12:07:32.132: I/dalvikvm(19308): at dalvik.system.NativeStart.main(Native Method)
06-29 12:07:32.890: W/dalvikvm(19308): threadid=4: spin on suspend #4 threadid=1 (pcf=0)
06-29 12:07:32.890: I/dalvikvm(19308): "Signal Catcher" daemon prio=5 tid=4 RUNNABLE
06-29 12:07:32.890: I/dalvikvm(19308): | group="system" sCount=0 dsCount=0 obj=0x40510490 self=0x159898
06-29 12:07:32.890: I/dalvikvm(19308): | sysTid=19312 nice=0 sched=0/0 cgrp=[fopen-error:2] handle=1575600
06-29 12:07:32.890: I/dalvikvm(19308): | schedstat=( 5340582 316192616 59 )
06-29 12:07:32.898: I/dalvikvm(19308): at dalvik.system.NativeStart.run(Native Method)
06-29 12:07:32.898: I/dalvikvm(19308): "main" prio=5 tid=1 RUNNABLE
06-29 12:07:32.898: I/dalvikvm(19308): | group="main" sCount=1 dsCount=0 obj=0x40022198 self=0xcec8
06-29 12:07:32.898: I/dalvikvm(19308): | sysTid=19308 nice=0 sched=0/0 cgrp=[fopen-error:2] handle=-1345006496
06-29 12:07:32.898: I/dalvikvm(19308): | schedstat=( 5364166234 3306213349 13647 )
06-29 12:07:32.929: I/dalvikvm(19308): at android.media.AudioTrack.native_write_short(Native Method)
06-29 12:07:32.945: I/dalvikvm(19308): at android.media.AudioTrack.write(AudioTrack.java:943)
06-29 12:07:32.953: I/dalvikvm(19308): at some.package.MyApp.modules.AudioPlayer.onPeriodicNotification(AudioPlayer.java:163)
解决方案
目前测试改变的代码,一切看起来都很顺利。问题出在JNI里面(我猜)。@n.Collins的声明"事实上JVM未报告任何错误,这表明问题由你的本地代码引起。"是指向解决方案的最准确的指针之一。我非常感谢所有回答过我的人,他们对我有所帮助。在尝试解决此问题时,我还删除了一组其他错误,这都要归功于社区。
onLowMemory()
不一定会被调用。我观察到,在本地代码(也可能是Java代码)中的OutOfMemoryErrors
可能会导致应用程序崩溃,而没有任何消息或日志记录。 - Rafael T