如何检查在Android Lollipop上授予SYSTEM_ALERT_WINDOW的权限? [英] How to check permission SYSTEM_ALERT_WINDOW is granted on Android Lollipop?

问题描述

请注意，我说的是 Android Lollipop .对于android 6.0，我们可以使用方法canDrawOverlays()来检查是否授予SYSTEM_ALERT_WINDOW.

Note that I'm talking about Android Lollipop. For android 6.0 we can use method canDrawOverlays() to check that SYSTEM_ALERT_WINDOW is granted or not.

使用Android Lollipop，默认情况下，几乎所有设备都会授予此权限.但是在小米，魅族的某些设备上.用户需要转到应用信息以允许它.

With Android Lollipop, almost devices grant this permission by default. But on some devices of Xiaomi, Meizu.. it is not granted. Users need to go to the App info to allow it.

我们如何以编程方式检查它以警告用户?

How can we check it programmatically to warn users?

推荐答案

在MIUI中使用

public static boolean isMiuiFloatWindowOpAllowed(@NonNull Context context) {
    final int version = Build.VERSION.SDK_INT;

    if (version >= 19) {
        return checkOp(context, OP_SYSTEM_ALERT_WINDOW); //See AppOpsManager.OP_SYSTEM_ALERT_WINDOW=24 /*@hide/
    } else {
        return (context.getApplicationInfo().flags & 1<<27) == 1;
    }
}

public static boolean checkOp(Context context, int op, String packageName, int uid) {
    final int version = Build.VERSION.SDK_INT;

    if (version >= 19) {
        AppOpsManager manager = (AppOpsManager) context.getSystemService(Context.APP_OPS_SERVICE);
        try {
            return (AppOpsManager.MODE_ALLOWED == (Integer) ReflectUtils.invokeMethod(manager, "checkOp", op, uid, packageName));
        } catch (Exception e) {
            e.printStackTrace();
        }
    } else {
        Flog.e("Below API 19 cannot invoke!");
    }
    return false;
}

ReflectUtils.java

ReflectUtils.java

public static Object invokeMethod(@NonNull Object receiver, String methodName, Object... methodArgs) throws Exception {
    Class<?>[] argsClass = null;
    if (methodArgs != null && methodArgs.length != 0) {
        int length = methodArgs.length;
        argsClass = new Class[length];
        for (int i=0; i<length; i++) {
            argsClass[i] = getBaseTypeClass(methodArgs[i].getClass());
        }
    }

    Method method = receiver.getClass().getMethod(methodName, argsClass);
    return method.invoke(receiver, methodArgs);
}

这篇关于如何检查在Android Lollipop上授予SYSTEM_ALERT_WINDOW的权限?的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！