Question

android实现扫描二维码调试的时候闪退（“抱歉，android相机出现问题。您可能需要重启设备”）

12-21 15:23:33.152 1728-1755/? E/BatteryExternalStatsWorker: modem info is invalid: ModemActivityInfo{ mTimestamp=34109163 mSleepTimeMs=9952 mIdleTimeMs=-244 mTxTimeMs[]=[196, 147, 184, 192, 717] mRxTimeMs=20852 mEnergyUsed=0}
12-21 15:23:40.686 738-820/? E/ANDR-PERF-RESOURCEQS: Failed to reset optimization [3, 0]
12-21 15:23:48.709 738-820/? E/ANDR-PERF-RESOURCEQS: Failed to reset optimization [3, 0]
12-21 15:23:56.735 738-820/? E/ANDR-PERF-RESOURCEQS: Failed to reset optimization [3, 0]
12-21 15:24:04.770 738-820/? E/ANDR-PERF-RESOURCEQS: Failed to reset optimization [3, 0]
12-21 15:24:12.805 738-820/? E/ANDR-PERF-RESOURCEQS: Failed to reset optimization [3, 0]
12-21 15:24:20.830 738-820/? E/ANDR-PERF-RESOURCEQS: Failed to reset optimization [3, 0]
12-21 15:24:24.593 1728-1744/? E/FastNetworkLocation: location time is older!!
12-21 15:24:24.598 1350-3831/? E/LocSvc_libulp: ulp_brain_transition_all_providers, no QUIPC/GNSS transition logic run due to both engines are OFF
12-21 15:24:28.852 738-820/? E/ANDR-PERF-RESOURCEQS: Failed to reset optimization [3, 0]
12-21 15:24:36.873 738-820/? E/ANDR-PERF-RESOURCEQS: Failed to reset optimization [3, 0]
12-21 15:24:44.897 738-820/? E/ANDR-PERF-RESOURCEQS: Failed to reset optimization [3, 0]
12-21 15:24:52.925 738-820/? E/ANDR-PERF-RESOURCEQS: Failed to reset optimization [3, 0]
12-21 15:25:00.962 738-820/? E/ANDR-PERF-RESOURCEQS: Failed to reset optimization [3, 0]
12-21 15:25:08.995 738-820/? E/ANDR-PERF-RESOURCEQS: Failed to reset optimization [3, 0]
12-21 15:25:17.030 738-820/? E/ANDR-PERF-RESOURCEQS: Failed to reset optimization [3, 0]
12-21 15:25:25.048 738-820/? E/ANDR-PERF-RESOURCEQS: Failed to reset optimization [3, 0]
12-21 15:25:33.084 738-820/? E/ANDR-PERF-RESOURCEQS: Failed to reset optimization [3, 0]
12-21 15:25:41.109 738-820/? E/ANDR-PERF-RESOURCEQS: Failed to reset optimization [3, 0]
12-21 15:25:49.141 738-820/? E/ANDR-PERF-RESOURCEQS: Failed to reset optimization [3, 0]
12-21 15:25:51.673 1728-1755/? E/BatteryExternalStatsWorker: no controller energy info supplied for bluetooth

Answer 1

1、在拍照过程中涉及到文件保存，以及Bitmap decode。及时释放打开的文件流和bitmap对象。节省内存。

2、图片crop时，将分辨率适当设小，防止图片过大。另外截图保存在uri中

Answer 2

你这个错误是BatteryExternalStatsWorker 是7.0的统计耗电量的api
你看下还有其异常信息没得

Answer 3

首先,你别打开二维码扫描,用自带相机软件打开相机看看是否正常,如不正常的话,可能相机真的有