Android permission.INTERACT_ACROSS_USERS denial

问题

I've a strange android permission denial, here is it:

java.lang.SecurityException: Permission Denial: isUserRunning() from pid=1078, uid=10284 requires android.permission.INTERACT_ACROSS_USERS

I haven't found anything about android.permission.INTERACT_ACROSS_USERS only android.permission.INTERACT_ACROSS_USERS_FULL

Here is the full logcat:

java.lang.SecurityException: Permission Denial: isUserRunning() from pid=25403, uid=10310 requires android.permission.INTERACT_ACROSS_USERS
    at android.os.Parcel.readException(Parcel.java:1693)
    at android.os.Parcel.readException(Parcel.java:1646)
    at android.app.ActivityManagerProxy.isUserRunning(ActivityManagerNative.java:7000)
    at android.os.UserManager.isUserUnlocked(UserManager.java:1069)
    at android.os.UserManager.isUserUnlocked(UserManager.java:1063)
    at com.android.launcher3.compat.UserManagerCompatVN.isUserUnlocked(UserManagerCompatVN.java:39)
    at com.android.launcher3.LauncherModel$LoaderTask.loadWorkspace(LauncherModel.java:1759)
    at com.android.launcher3.LauncherModel$LoaderTask.loadAndBindWorkspace(LauncherModel.java:1387)
    at com.android.launcher3.LauncherModel$LoaderTask.run(LauncherModel.java:1486)
    at android.os.Handler.handleCallback(Handler.java:751)
    at android.os.Handler.dispatchMessage(Handler.java:95)
    at android.os.Looper.loop(Looper.java:154)
    at android.os.HandlerThread.run(HandlerThread.java:61)

I've added this to my manifest:

<permission android:name="android.permission.INTERACT_ACROSS_USERS" android:protectionLevel="signature"/>
<permission android:name="android.permission.INTERACT_ACROSS_USERS_FULL" android:protectionLevel="signature"/>

回答1:

You should implement permission request at run-time in Android, specifically for Marshmallow or higher version. If you don’t implement run-time permission, then your application will crash or will not work properly on the device having Marshmallow.

I hope you are now pretty much aware with Runtime Permission concept in Marshmallow. Let’s understand this code:

int currentAPIVersion = Build.VERSION.SDK_INT;
if(currentAPIVersion>=android.os.Build.VERSION_CODES.M)
 {
    if (ContextCompat.checkSelfPermission(context, Manifest.permission.INTERACT_ACROSS_USERS) != PackageManager.PERMISSION_GRANTED) {
        if (ActivityCompat.shouldShowRequestPermissionRationale((Activity) context, Manifest.permission.INTERACT_ACROSS_USERS)) {
            AlertDialog.Builder alertBuilder = new AlertDialog.Builder(context);
            alertBuilder.setCancelable(true);
            alertBuilder.setTitle("Permission necessary");
            alertBuilder.setMessage("Interact across users permission is necessary to this app");
            alertBuilder.setPositiveButton(android.R.string.yes, new DialogInterface.OnClickListener() {
                @Override
                public void onClick(DialogInterface dialog, int which) {
                    ActivityCompat.requestPermissions((Activity)context, new String[]{Manifest.permission.INTERACT_ACROSS_USERS}, MY_PERMISSIONS_REQUEST_INTERACT_ACROSS_USERS);
                }
            });
            AlertDialog alert = alertBuilder.create();
            alert.show();
        } else {
            ActivityCompat.requestPermissions((Activity)context, new String[]{Manifest.permission.INTERACT_ACROSS_USERS}, MY_PERMISSIONS_REQUEST_INTERACT_ACROSS_USERS);
        }
    }
}


 @Override
public void onRequestPermissionsResult(int requestCode, String[] permissions, int[] grantResults) {
    switch (requestCode) {
 case MY_PERMISSIONS_REQUEST_INTERACT_ACROSS_USERS:
            if (grantResults.length > 0 && grantResults[0] == PackageManager.PERMISSION_GRANTED) {
               // do something here...
               Toast.makeText(getApplicationContext(), "Permission granted", Toast.LENGTH_SHORT).show();
        } else {
         //code for deny
         Toast.makeText(getApplicationContext(), "Permission denied", Toast.LENGTH_SHORT).show();

}
         break;
    }
}

来源：https://stackoverflow.com/questions/43556869/android-permission-interact-across-users-denial