由网友(拾柒)分享简介：我知道这是很简单的事情，但我遇到一个很奇怪的问题。我打电话给警察处于危险状况，只需按一个按钮就。所以，我已经使用下列code调用。I know it was very simple to do it but I come across a very strange issue. I have to call Pol...

我知道这是很简单的事情，但我遇到一个很奇怪的问题。我打电话给警察处于危险状况，只需按一个按钮就。所以，我已经使用下列code调用。

I know it was very simple to do it but I come across a very strange issue. I have to call Police in danger Situation by just tapping a button. So I have used following code to call.

Intent callIntent = new Intent(Intent.ACTION_CALL);
            callIntent.setData(Uri.parse("tel:100"));
            callIntent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
            ctx.startActivity(callIntent);

新增 CALL_PHONE 许可的Andr​​oidManifest.xml 。问题是，它是在拨号盘开100，但不能直接拨打电话。我想，当用户点击按钮立即发生。

Added CALL_PHONE permission in AndroidManifest.xml. The Issue is that it is opening the 100 on Dial Pad but not making call directly. I want that to happen immediately when user clicks on the button.

当我试图把+91 100之前，它会自动呼叫的号码，但为什么加上需要这样的数字。所以有人帮助我如何解决这个问题

When I tried to to put +91 before 100 it is calling the number automatically but why plus is required for such numbers. So Someone help me how to solve this issue

推荐答案

从文件 ACTION_CALL ：

请注意：会有限制哪些应用程序可以发起呼叫;大多数应用程序应该使用ACTION_DIAL。

Note: there will be restrictions on which applications can initiate a call; most applications should use the ACTION_DIAL.

注：本意向书不能用来拨打紧急电话号码。应用程序可以拨打然而，使用ACTION_DIAL紧急号码。

Note: this Intent cannot be used to call emergency numbers. Applications can dial emergency numbers using ACTION_DIAL, however.

这么看来这种行为是故意的。

So it seems this behavior is on purpose.