何時使用 adb shell getprop sys.boot_completed

Question

我正在調用一系列 adb 命令，如下所示

"adb root"
adbd is already running as root
"adb wait-for-device"
"adb shell getprop sys.boot_completed"
1
boot_completed successful
"adb remount"
remount succeeded
"adb uninstall ..."
Success
"adb shell rm -rf ..."
"adb push ..."
9366 KB/s (46299481 bytes in 4.827s)
"adb push ..."
14 files pushed. 0 files skipped.
9701 KB/s (26658580 bytes in 2.683s)
"adb push ..."
14 files pushed. 0 files skipped.
9544 KB/s (33592272 bytes in 3.437s)
"adb reboot"
"adb wait-for-device"
"adb root"
error: protocol fault (no status)
error: protocol fault (no status)
Sleeping 2 sec. before retrying
increasing timeout by 180.0 seconds
"adb root"
error: device not found
error: device not found
Sleeping 2 sec. before retrying
increasing timeout by 270.0 seconds
"adb root"
error: device not found
error: device not found
Sleeping 2 sec. before retrying
increasing timeout by 405.0 seconds
"adb root"
error: device not found
error: device not found

但正如您所見，android 設備最后開始拋出“未找到設備”錯誤。 我知道“adb reboot”可能是這里的罪魁禍首，因為在下一個命令開始執行之前，reboot 可能還沒有完全完成引導。 為了檢查這一點，我使用了“adb wait-for-device”。 但似乎無法正確檢測到設備 state。
我還發現使用“adb shell getprop sys.boot_completed”來糾正這個錯誤。 檢測 Android 仿真器何時完全啟動

我不確定何時使用“adb shell getprop sys.boot_completed”。 它是在每次重新啟動設備時使用還是可以在每個“adb wait-for-device”命令后使用？

Answer 1

您應該在啟動或重新啟動后調用getprop sys.boot_completed並與adb wait-for-device一起調用，如下所示：

adb wait-for-device shell 'while [[ -z $(getprop sys.boot_completed) ]]; do sleep 1; done; input keyevent 82' 

當您僅調用單個adb wait-for-device時，它並不能保證引導已完成，因為它僅檢查守護程序是否已正確啟動。