【错误记录】Android 命令行执行 7zr 可执行程序报错 ( Cannot run program “7zr“ : error=13, Permission denied )_wx5c66153045676的技术博客_

【错误记录】Android 命令行执行 7zr 可执行程序报错 ( Cannot run program “7zr“ : error=13, Permission denied )

在 Android 应用中 , 使用 7zr 可执行程序进行压缩 , 解压缩操作 ;
2021-04-29 21:15:52.762 29422-29422/kim.hsl.a7_zip E/AndroidRuntime: FATAL EXCEPTION: main
    Process: kim.hsl.a7_zip, PID: 29422
    java.lang.RuntimeException: Unable to start activity ComponentInfo{kim.hsl.a7_zip/kim.hsl.a7_zip.MainActivity}: java.io.IOException: Cannot run program "/data/user/0/kim.hsl.a7_zip/files/7zr": error=13, Permission denied
        at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2951)
        at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:3086)
        at android.app.servertransaction.LaunchActivityItem.execute(LaunchActivityItem.java:78)
        at android.app.servertransaction.TransactionExecutor.executeCallbacks(TransactionExecutor.java:108)
        at android.app.servertransaction.TransactionExecutor.execute(TransactionExecutor.java:68)
        at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1816)
        at android.os.Handler.dispatchMessage(Handler.java:106)
        at android.os.Looper.loop(Looper.java:193)
        at android.app.ActivityThread.main(ActivityThread.java:6718)
        at java.lang.reflect.Method.invoke(Native Method)
        at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:493)
        at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:858)
     Caused by: java.io.IOException: Cannot run program "/data/user/0/kim.hsl.a7_zip/files/7zr": error=13, Permission denied
        at java.lang.ProcessBuilder.start(ProcessBuilder.java:1050)
        at java.lang.Runtime.exec(Runtime.java:695)
        at java.lang.Runtime.exec(Runtime.java:525)
        at java.lang.Runtime.exec(Runtime.java:422)
        at kim.hsl.a7_zip.MainActivity.compress7z(MainActivity.kt:88)
        at kim.hsl.a7_zip.MainActivity.onCreate(MainActivity.kt:20)
        at android.app.Activity.performCreate(Activity.java:7144)
        at android.app.Activity.performCreate(Activity.java:7135)
        at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1271)
        at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2931)
        at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:3086) 
        at android.app.servertransaction.LaunchActivityItem.execute(LaunchActivityItem.java:78) 
        at android.app.servertransaction.TransactionExecutor.executeCallbacks(TransactionExecutor.java:108) 
        at android.app.servertransaction.TransactionExecutor.execute(TransactionExecutor.java:68) 
        at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1816) 
        at android.os.Handler.dispatchMessage(Handler.java:106) 
        at android.os.Looper.loop(Looper.java:193) 
        at android.app.ActivityThread.main(ActivityThread.java:6718) 
        at java.lang.reflect.Method.invoke(Native Method) 
        at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:493) 
        at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:858) 
     Caused by: java.io.IOException: error=13, Permission denied
        at java.lang.UNIXProcess.forkAndExec(Native Method)
        at java.lang.UNIXProcess.<init>(UNIXProcess.java:133)
        at java.lang.ProcessImpl.start(ProcessImpl.java:132)
        at java.lang.ProcessBuilder.start(ProcessBuilder.java:1029)
        at java.lang.Runtime.exec(Runtime.java:695) 
        at java.lang.Runtime.exec(Runtime.java:525) 
        at java.lang.Runtime.exec(Runtime.java:422) 
        at kim.hsl.a7_zip.MainActivity.compress7z(MainActivity.kt:88) 
        at kim.hsl.a7_zip.MainActivity.onCreate(MainActivity.kt:20) 
        at android.app.Activity.performCreate(Activity.java:7144) 
        at android.app.Activity.performCreate(Activity.java:7135) 
        at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1271) 
        at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2931) 
        at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:3086) 
        at android.app.servertransaction.LaunchActivityItem.execute(LaunchActivityItem.java:78) 
        at android.app.servertransaction.TransactionExecutor.executeCallbacks(TransactionExecutor.java:108) 
        at android.app.servertransaction.TransactionExecutor.execute(TransactionExecutor.java:68) 
        at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1816) 
        at android.os.Handler.dispatchMessage(Handler.java:106) 
        at android.os.Looper.loop(Looper.java:193) 
        at android.app.ActivityThread.main(ActivityThread.java:6718) 
        at java.lang.reflect.Method.invoke(Native Method) 
        at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:493) 
        at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:858) 
二、解决方案 

进入 " /data/user/0/kim.hsl.a7_zip/files " 目录 , 查看文件 , 执行 " ls -la " 查看文件的详细信息 , 发现 7zr 文件的权限只有读写权限 , 没有 x 可执行权限 ; 

C:\Users\octop>adb shell
walleye:/ $ su
walleye:/ # cd /data/user/0/kim.hsl.a7_zip/files
walleye:/data/user/0/kim.hsl.a7_zip/files # ls
walleye:/data/user/0/kim.hsl.a7_zip/files # ls -la
total 992
drwxrwx--x 2 u0_a438 u0_a438   4096 2021-04-29 21:15 .
drwx------ 5 u0_a438 u0_a438   4096 2021-04-29 21:15 ..
-rw------- 1 u0_a438 u0_a438 994304 2021-04-29 21:15 7zr
walleye:/data/user/0/kim.hsl.a7_zip/files #

调用 File 的 setExecutable(true) 方法 , 为该文件设置可执行权限 ; 
        // /data/user/0/kim.hsl.a7_zip/files/7zr
        var exeFile = File(filesDir, "7zr")
        // 执行前赋予可执行权限
        exeFile.setExecutable(true)
                            【Android 安装包优化】Android 应用中 7zr 可执行程序准备  ( Android Studio 导入可执行 7zr 程序 | 从 Assets 资源文件拷贝 7zr 到内置存储 )
                             一、Android Studio 导入可执行 7zr 程序、二、从 Assets 资源文件拷贝 7zr 到内置存储空间、三、参考资料、
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