/system/bin/su 没有权限

[chengfangpeng]

通过adb shell 进去后是可以su的，但是在app里调用发现没有权限，作者知道怎么处理这个问题吗

2022-07-12 13:59:50.557 6094-6094/? W/System.err: java.io.IOException: Cannot run program "/system/bin/su": error=13, Permission denied
2022-07-12 13:59:50.558 6094-6094/? W/System.err:     at java.lang.ProcessBuilder.start(ProcessBuilder.java:1050)
2022-07-12 13:59:50.558 6094-6094/? W/System.err:     at java.lang.Runtime.exec(Runtime.java:694)
2022-07-12 13:59:50.559 6094-6094/? W/System.err:     at java.lang.Runtime.exec(Runtime.java:524)
2022-07-12 13:59:50.559 6094-6094/? W/System.err:     at java.lang.Runtime.exec(Runtime.java:421)
2022-07-12 13:59:50.559 6094-6094/? W/System.err:     at com.yujing.serialport.SerialPort.<init>(SerialPort.java:102)
2022-07-12 13:59:50.560 6094-6094/? W/System.err:     at com.yujing.serialport.SerialPort$Builder.build(SerialPort.java:296)
2022-07-12 13:59:50.560 6094-6094/? W/System.err:     at com.yujing.yserialport.YSerialPort.start(YSerialPort.java:234)
2022-07-12 13:59:50.560 6094-6094/? W/System.err:     at com.yujing.yserialport.YSerialPort.start(YSerialPort.java:218)
2022-07-12 13:59:50.561 6094-6094/? W/System.err:     at com.example.tvsample.MainActivity.onCreate(MainActivity.java:29)
2022-07-12 13:59:50.561 6094-6094/? W/System.err:     at android.app.Activity.performCreate(Activity.java:8050)
2022-07-12 13:59:50.561 6094-6094/? W/System.err:     at android.app.Activity.performCreate(Activity.java:8030)
2022-07-12 13:59:50.561 6094-6094/? W/System.err:     at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1329)
2022-07-12 13:59:50.562 6094-6094/? W/System.err:     at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:3608)
2022-07-12 13:59:50.562 6094-6094/? W/System.err:     at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:3792)
2022-07-12 13:59:50.562 6094-6094/? W/System.err:     at android.app.servertransaction.LaunchActivityItem.execute(LaunchActivityItem.java:103)
2022-07-12 13:59:50.563 6094-6094/? W/System.err:     at android.app.servertransaction.TransactionExecutor.executeCallbacks(TransactionExecutor.java:135)
2022-07-12 13:59:50.563 6094-6094/? W/System.err:     at android.app.servertransaction.TransactionExecutor.execute(TransactionExecutor.java:95)
2022-07-12 13:59:50.564 6094-6094/? W/System.err:     at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2210)
2022-07-12 13:59:50.564 6094-6094/? W/System.err:     at android.os.Handler.dispatchMessage(Handler.java:106)
2022-07-12 13:59:50.564 6094-6094/? W/System.err:     at android.os.Looper.loopOnce(Looper.java:201)
2022-07-12 13:59:50.565 6094-6094/? W/System.err:     at android.os.Looper.loop(Looper.java:288)
2022-07-12 13:59:50.565 6094-6094/? W/System.err:     at android.app.ActivityThread.main(ActivityThread.java:7839)
2022-07-12 13:59:50.565 6094-6094/? W/System.err:     at java.lang.reflect.Method.invoke(Native Method)
2022-07-12 13:59:50.566 6094-6094/? W/System.err:     at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:548)
2022-07-12 13:59:50.566 6094-6094/? W/System.err:     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1137)
2022-07-12 13:59:50.567 6094-6094/? W/System.err: Caused by: java.io.IOException: error=13, Permission denied
2022-07-12 13:59:50.568 6094-6094/? W/System.err:     at java.lang.UNIXProcess.forkAndExec(Native Method)
2022-07-12 13:59:50.568 6094-6094/? W/System.err:     at java.lang.UNIXProcess.<init>(UNIXProcess.java:133)
2022-07-12 13:59:50.569 6094-6094/? W/System.err:     at java.lang.ProcessImpl.start(ProcessImpl.java:141)
2022-07-12 13:59:50.569 6094-6094/? W/System.err:     at java.lang.ProcessBuilder.start(ProcessBuilder.java:1029)
2022-07-12 13:59:50.569 6094-6094/? W/System.err: 	... 24 more

[yutils]

邮件已收到。                  ——雨季余静

[yutils]

调串口不需要root权限