您可以通过从您的应用程序执行pm grant命令来获得对根设备的许可。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。