无法获得 WRITE_SETTINGS 权限 [英] Can't get WRITE_SETTINGS permission

问题描述

当我在 Android M Preview 3 上的目标 API 为 23 时，我似乎无法获得 Manifest.permission.WRITE_SETTTINGS 权限.

When I have a target API of 23 on Android M Preview 3, I cannot seem to acquire the Manifest.permission.WRITE_SETTTINGS permission.

requestPermissions(new String[]{Manifest.permission.WRITE_SETTINGS}, 101);

请求权限不会显示我期望的对话框，但如果我在没有此权限的情况下进行以下调用，

Request permission doesn't bring up the dialog I would expect, but if I make the following call without this permission,

 RingtoneManager.setActualDefaultRingtoneUri(activity, RingtoneManager.TYPE_RINGTONE, ringUri);

除非我没有权限，否则调用会.

The call will except because I don't have the permission.

我不知道从哪里开始.23 有新的铃声 API 吗?还是这个权限的变化只是让任何非系统应用程序无法更改铃声?

I'm not sure where to go from here. Is there a new ringtone API for 23? Or did this permission change just make it impossible for any non-system apps to change the ringtone?

推荐答案

使用 WRITE_SETTINGS，基于文档:

1. 在清单中正常使用 元素.

调用Settings.System.canWrite() 看看你是否有资格写出设置.

Call Settings.System.canWrite() to see if you are eligible to write out settings.

如果 canWrite() 返回 false，则启动 ACTION_MANAGE_WRITE_SETTINGS 活动，以便用户同意允许您的应用实际写入设置.

If canWrite() returns false, start up the ACTION_MANAGE_WRITE_SETTINGS activity so the user can agree there to allow your app to actually write to settings.

换句话说，写入设置现在是双重选择(同意安装，在设置中单独同意以允许)，类似于设备管理 API、辅助功能服务等.

In other words, writing to settings is now a double-opt-in (agree to install, agree separately in Settings to allow), akin to device admin APIs, accessibility services, etc.

另请注意，我还没有尝试使用这些 —这是基于 我昨天在 Android 上所做的研究6.0 变化.

Also note that I have not tried using these yet — this is based on research that I did yesterday on Android 6.0 changes.

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