在 Android Studio 中使用 Logcat 时出现如下信息WARNING: Logcat was not cleared on the device itself because logcat -c timed out. logcat: Unexpected EOF! This means that either the device shut down, logd crashed, or this instance of logcat was unable to read log messages as quickly as they were being produced. If you have enabled significant logging, look into using the -G option to increase log buffer sizes.问题原因Android 设备的日志缓冲区被写满了而且新日志生成的速度太快导致 Logcat 读取跟不上从而连接中断报错的是 Android Studio也就是 ADB 客户端而不是设备本身1. 写入速度大于读取速度生产者设备和消费者Android Studio之间出现了速度差 2. 如果生产者写入新数据的速度极快以至于在新数据覆盖旧数据的过程中把 Android Studio 还没来得及读取的那段旧数据也给覆盖掉了于是报错处理策略使用 ADB 清空现有日志立即恢复adb logcat-c补充学习查看缓冲区大小adb logcat-g# 输出结果 main: ring buffer is 16 MiB (597 KiB consumed), max entry is 5120 B, max payload is 4068 B system: ring buffer is 16 MiB (256 KiB consumed), max entry is 5120 B, max payload is 4068 B crash: ring buffer is 16 MiB (0 B consumed), max entry is 5120 B, max payload is 4068 B kernel: ring buffer is 16 MiB (12 KiB consumed), max entry is 5120 B, max payload is 4068 B修改缓冲区大小例如将缓冲区大小设为 4MBadb logcat-G4m缓冲区的“自清”1. Android 的 logcat 缓冲区在底层是一个环形缓冲区 2. 当新日志写入时如果缓冲区还有剩余空间就直接追加 3. 当缓冲区完全写满时新日志会从缓冲区的头部开始覆盖最旧的日志
