oom，极光后台的错误日志

这是极光后台给我的错误日志，我看不出哪儿出的问题

java.lang.OutOfMemoryError: Failed to allocate a 8204 byte allocation with 3238712 free bytes and 3MB until OOM
    at java.nio.ByteBuffer.allocate(ByteBuffer.java:56)
    at com.android.internal.util.FastXmlSerializer.<init>(FastXmlSerializer.java:62)
    at com.android.internal.util.XmlUtils.writeMapXml(XmlUtils.java:188)
    at android.app.SharedPreferencesImpl.writeToFile(SharedPreferencesImpl.java:600)
    at android.app.SharedPreferencesImpl.access$800(SharedPreferencesImpl.java:52)
    at android.app.SharedPreferencesImpl$2.run(SharedPreferencesImpl.java:515)
    at android.app.SharedPreferencesImpl.enqueueDiskWrite(SharedPreferencesImpl.java:536)
    at android.app.SharedPreferencesImpl.access$100(SharedPreferencesImpl.java:52)
    at android.app.SharedPreferencesImpl$EditorImpl.commit(SharedPreferencesImpl.java:458)
    at cn.jiguang.a.b.c.b(Unknown Source)
    at cn.jiguang.a.a.d.b.b(Unknown Source)
    at cn.jiguang.a.a.d.f.run(Unknown Source)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1113)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:588)
    at java.lang.Thread.run(Thread.java:818)