fixbug：修复BeepManager的构造方法调用链updatePrefs->buildMediaPlayer-> mediaPlay…

[arthur20150522]

错误日志堆栈

"main" prio=5 tid=1 Native
| group="main" sCount=1 dsCount=0 flags=1 obj=0x72364640 self=0xb4000075a388bc00
| sysTid=32344 nice=-10 cgrp=default sched=0/0 handle=0x762ae674f8
| state=S schedstat=( 7185475396 386459212 6952 ) utm=648 stm=69 core=7 HZ=100
| stack=0x7fd33cb000-0x7fd33cd000 stackSize=8192KB
| held mutexes=
native: #00 pc 00000000000d6a94 /apex/com.android.runtime/lib64/bionic/libc.so!libc.so (offset 9b000) (__ioctl+4)
native: #1 pc 00000000000935c4 /apex/com.android.runtime/lib64/bionic/libc.so!libc.so (offset 8a000) (ioctl+156)
native: #2 pc 0000000000051a7c /system/lib64/libbinder.so (android::IPCThreadState::talkWithDriver(bool)+296)
native: #3 pc 0000000000052a68 /system/lib64/libbinder.so (android::IPCThreadState::waitForResponse(android::Parcel*, int*)+60)
native: #4 pc 00000000000527d8 /system/lib64/libbinder.so (android::IPCThreadState::transact(int, unsigned int, android::Parcel const&, android::Parcel*, unsigned int)+184)
native: #5 pc 000000000004b01c /system/lib64/libbinder.so (android::BpBinder::transact(unsigned int, android::Parcel const&, android::Parcel*, unsigned int)+188)
native: #6 pc 0000000000047378 /system/lib64/libmedia.so (android::BpMediaPlayerService::create(android::spandroid::IMediaPlayerClient const&, audio_session_t)+580)
native: #7 pc 000000000003aff8 /system/lib64/libmedia.so (android::MediaPlayer::setDataSource(int, long, long)+252)
native: #8 pc 000000000006053c /system/lib64/libmedia_jni.so (android_media_MediaPlayer_setDataSourceFD(_JNIEnv*, _jobject*, _jobject*, long, long)+212)
at android.media.MediaPlayer._setDataSource(Native method)
at android.media.MediaPlayer.setDataSource(MediaPlayer.java:1298)
at com.king.camera.scan.manager.BeepManager.buildMediaPlayer(BeepManager.java:92)
at com.king.camera.scan.manager.BeepManager.updatePrefs(BeepManager.java:64)

• locked <0x049613ce> (a com.king.camera.scan.manager.BeepManager)
  at com.king.camera.scan.manager.BeepManager.(BeepManager.java:51)
  at com.king.camera.scan.BaseCameraScan.initData(BaseCameraScan.java:235)
  at com.king.camera.scan.BaseCameraScan.(BaseCameraScan.java:177)
  at com.king.camera.scan.BaseCameraScan.(BaseCameraScan.java:166)
  at com.king.camera.scan.BaseCameraScanActivity.createCameraScan(BaseCameraScanActivity.java:226)
  at com.king.camera.scan.BaseCameraScanActivity.initUI(BaseCameraScanActivity.java:87)
  at com.king.camera.scan.BaseCameraScanActivity.onCreate(BaseCameraScanActivity.java:72)
  at android.app.Activity.performCreate(Activity.java:8311)
  at android.app.Activity.performCreate(Activity.java:8283)
  at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1315)
  at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:3710)
  at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:3897)
  at android.app.servertransaction.LaunchActivityItem.execute(LaunchActivityItem.java:85)
  at android.app.servertransaction.TransactionExecutor.executeCallbacks(TransactionExecutor.java:135)
  at android.app.servertransaction.TransactionExecutor.execute(TransactionExecutor.java:95)
  at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2333)
  at android.os.Handler.dispatchMessage(Handler.java:106)
  at android.os.Looper.loop(Looper.java:237)
  at android.app.ActivityThread.main(ActivityThread.java:8414)
  at java.lang.reflect.Method.invoke(Native method)
  at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:663)
  at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:967)

修复BeepManager的构造方法调用链，主线程调用导致的anr问题

[jenly1314]

媒体资源才1KB， 什么设备会因MediaPlayer._setDataSource 触发ANR？请提供下设备相关信息。