您可以通过在应用程序中执行pm grant命令来获得对已植根设备的许可。不过，为了使更改生效，您可能必须在此之后重新启动应用程序：
String pname = getPackageName();String[] CMDLINE_GRANTPERMS = { "su", "-c", null };if (getPackageManager().checkPermission(android.Manifest.permission.READ_LOGS, pname) != 0) { Log.d(TAG, "we do not have the READ_LOGS permission!"); if (android.os.Build.VERSION.SDK_INT >= 16) { Log.d(TAG, "Working around JellyBeans 'feature'..."); try { // format the commandline parameter CMDLINE_GRANTPERMS[2] = String.format("pm grant %s android.permission.READ_LOGS", pname); java.lang.Process p = Runtime.getRuntime().exec(CMDLINE_GRANTPERMS); int res = p.waitFor(); Log.d(TAG, "exec returned: " + res); if (res != 0) throw new Exception("failed to become root"); } catch (Exception e) { Log.d(TAG, "exec(): " + e); Toast.makeText(context, "Failed to obtain READ_LOGS permission", Toast.LENGTH_LONG).show(); } }} else Log.d(TAG, "we have the READ_LOGS permission already!");该代码应从您的onCreate（）中调用。授予权限后，就不再需要root用户权限。
PS：Superuser应用程序上的p.waitFor（）会阻塞，从而延迟了应用程序的启动并可能导致ANR。
