如何在单击按钮时打开蓝牙 [英] How to turn on bluetooth on button click

问题描述

在我的应用程序中，我需要通过单击按钮打开设备的蓝牙.我怎样才能做到这一点?一个例子将非常有帮助.另外，我需要在我的 mainfest.xml 中包含哪些权限?

In my application, I need to turn on bluetooth of my device on a button click. How can I achieve that? An example will be really helpful. Also, what permissions I require to include in my mainfest.xml for the same?

推荐答案

以下代码摘自 关于蓝牙的安卓文档

在权限清单文件中:

<manifest ... >
  <uses-permission android:name="android.permission.BLUETOOTH" />
  ...
</manifest>

启用蓝牙的源代码

BluetoothAdapter mBluetoothAdapter = BluetoothAdapter.getDefaultAdapter();
if (mBluetoothAdapter == null) {
    // Device does not support Bluetooth
}

if (!mBluetoothAdapter.isEnabled()) {
    Intent enableBtIntent = new Intent(BluetoothAdapter.ACTION_REQUEST_ENABLE);
    startActivityForResult(enableBtIntent, REQUEST_ENABLE_BT);
}

如果启用蓝牙成功，您的Activity 将在onActivityResult() 回调中收到RESULT_OK 结果代码.如果蓝牙由于错误而未启用(或用户回答否")，则结果代码将为 RESULT_CANCELED.

If enabling Bluetooth succeeds, your Activity will receive the RESULT_OK result code in the onActivityResult() callback. If Bluetooth was not enabled due to an error (or the user responded "No") then the result code will be RESULT_CANCELED.

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