如何给Android的shell用户授予更多权限？

Question

我使用ndk构建了一些命令行工具，并在/data/local/tmp中执行它。现在，当我在我的命令行工具中调用一些OpenSLES API时，它提示我“需要android.permission.RECORD_AUDIO”：

W/AudioRecord( 4226): AUDIO_INPUT_FLAG_FAST denied by client
W/ServiceManager(  207): Permission failure: android.permission.RECORD_AUDIO from uid=2000 pid=4226
E/        (  207): Request requires android.permission.RECORD_AUDIO
D/PowerManagerService(  964): handleSandman: canDream=false, mWakefulness=Asleep
E/AudioFlinger(  207): openRecord() permission denied: recording not allowed
E/AudioRecord( 4226): AudioFlinger could not create record track, status: -1
E/libOpenSLES( 4226): android_audioRecorder_realize(0x453430) error creating AudioRecord object
W/libOpenSLES( 4226): Leaving Object::Realize (SL_RESULT_CONTENT_UNSUPPORTED)

我也尝试授予Shell权限，使用pm grant命令：

pm grant "com.android.shell" android.permission.RECORD_AUDIO
pm grant "com.android.shell" android.permission.RECORD_AUDIO
pm grant "com.android.shell" android.permission.RECORD_AUDIO
Operation not allowed: java.lang.SecurityException: Package com.android.shell has not requested permission android.permission.RECORD_AUDIO

更改/system/etc/permissions/platform.xml也没有效果。

我可以在Android shell中调试我的OpenSLES演示吗？如何在shell中获得更多权限。

每个实验代码片段都必须创建一个jni和java项目，并在更改某些C ++接口时一起修改吗？

我可以直接从shell中的命令工具访问RECORD_AUDIO、CAMERA吗？

- skywind3000

---

@Samveen 你有一篇关于在安卓终端运行C++应用程序的帖子。你知道如何给C++应用程序授予权限吗？ - skywind3000

是的，您可以以超级用户身份运行它。您需要一个已经取得了 root 权限的设备。 - Alex Cohn

Answer 1

这是Android Marshmallow中的新权限模型。要获取此权限，您需要提示用户授权。以下是我的操作步骤：

1. Whenever I need RECORD_AUDIO permission I run a check to see if I have it:

   private boolean hasRecordAudioPermission(){
       boolean hasPermission = (ContextCompat.checkSelfPermission(this,
           Manifest.permission.RECORD_AUDIO) == PackageManager.PERMISSION_GRANTED);
   
       log("Has RECORD_AUDIO permission? " + hasPermission);
       return hasPermission;
   }
   

2. If I don't have it then request it

   private void requestRecordAudioPermission(){
   
       String requiredPermission = Manifest.permission.RECORD_AUDIO;
   
       // If the user previously denied this permission then show a message explaining why
       // this permission is needed
       if (ActivityCompat.shouldShowRequestPermissionRationale(this,
               requiredPermission)) {
   
           showToast("This app needs to record audio through the microphone....");
       }
   
       // request the permission.
       ActivityCompat.requestPermissions(this,
               new String[]{requiredPermission},
               PERMISSIONS_REQUEST_RECORD_AUDIO);
   }
   
   @Override
   public void onRequestPermissionsResult(int requestCode,
                                          String permissions[], int[] grantResults) {
   
       // This method is called when the user responds to the permissions dialog
   }
   

- donturner