Fries_I23

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问题

近期在真机上调试 flutter 应用时, 虽然 app 已经在机器上安装并且启动，但是始终无法连接调试服务器， 在模拟器上时缺是可以正常连接服务器的，具体日志如下:

$ flutter run --debug --verbose
...
[   +9 ms] Stopping app 'app-debug.apk' on Redmi Note 7.
[        ] executing: /Path/To/adb -s 4ef1bd95 shell am force-stop org.example.app
[ +129 ms] executing: /Path/To/adb -s 4ef1bd95 shell pm list packages org.example.app
[ +149 ms] package:org.example.app
[   +1 ms] executing: /Path/To/adb -s 4ef1bd95 shell cat /data/local/tmp/sky.org.example.app.sha1
[ +110 ms] 414badd53655760048218d30c949cabe2f90a436
[   +1 ms] Installing APK.
[        ] Installing build\app\outputs\flutter-apk\app-debug.apk...
[        ] executing: /Path/To/adb -s 4ef1bd95 install -t -r D:\Users\weooh\Documents\Projects\mhabit\build\app\outputs\flutter-apk\app-debug.apk
[+5746 ms] Performing Streamed Install
                    Success
[        ] Installing build\app\outputs\flutter-apk\app-debug.apk... (completed in 5.7s)
[        ] executing: /Path/To/adb -s 4ef1bd95 shell echo -n fb80be699d0db784baf5c448f563b4e8af8a4624 > /data/local/tmp/sky.org.example.app.sha1
[  +83 ms] executing: /Path/To/adb -s 4ef1bd95 shell -x logcat -v time -t 1
[ +497 ms] --------- beginning of system
                    05-24 08:35:21.353 W/MiuiPerfServiceClient( 3561): interceptAndQueuing:15974|com.android.settings|284|93|unknown|null|com.android.settings/com.android.settings.SubSettings|862987446123972|Slow main thread|6
[  +13 ms] executing: /Path/To/adb -s 4ef1bd95 shell am start -a android.intent.action.MAIN -c android.intent.category.LAUNCHER -f 0x20000000 --ez enable-dart-profiling true --ez
enable-checked-mode true --ez verify-entry-points true org.example.app/org.example.app.MainActivity
[ +217 ms] Starting: Intent { act=android.intent.action.MAIN cat=[android.intent.category.LAUNCHER] flg=0x20000000 cmp=org.example.app/.MainActivity (has extras) }
[        ] Waiting for observatory port to be available...

解决方法

个人使用的机器是红米的 Redmi Note 7, 由于 MIUI 新版默认设置中 日志记录器缓冲器大小 为 off, 导致 adb logcat 无法正确输出日志，解决方案如下：

  1. 开启开发者权限，具体查看 How to Enable Developer Options on Xiaomi Devices

  2. 进入开发者选项，将 日志记录器缓冲器大小 选项调整为最大

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