编程启用蓝牙在Android [英] Programmatically enabling bluetooth on Android

问题描述

我试图确定编程实现在Android蓝牙preferred方式。我发现以下任一技术工作（至少在Android 4.0.4 ...）：

I'm trying to determine the preferred way for programmatically enabling bluetooth on Android. I've found that either of the following techniques works (at least on Android 4.0.4...):

public class MyActivity extends Activity {
    public static final int MY_BLUETOOTH_ENABLE_REQUEST_ID = 6;
    ...
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        ...
        Intent enableBtIntent = new Intent(BluetoothAdapter.ACTION_REQUEST_ENABLE);
        startActivityForResult(enableBtIntent, MY_BLUETOOTH_ENABLE_REQUEST_ID);
    }

    @Override
    protected void onActivityResult(int requestCode, int resultCode, Intent data) {
        super.onActivityResult(requestCode, resultCode, data);
        if (requestCode == MY_BLUETOOTH_ENABLE_REQUEST_ID) {
            if (resultCode == RESULT_OK) {
                // Request granted - bluetooth is turning on...
            }
            if (resultCode == RESULT_CANCELED) {
                // Request denied by user, or an error was encountered while 
                // attempting to enable bluetooth
            }
        }
    }

或...

BluetoothAdapter.getDefaultAdapter().enable();

前者询问许可启用而后者只是默默地使蓝牙（但需要android.permission.BLUETOOTH_ADMIN许可）事先给用户。是一个或另一个旧/过时的和/或一种技术仅适用于某些设备？或者是它只是一个以我个人的使用preference的事？

The former asks the user for permission prior to enabling while the latter just silently enables bluetooth (but requires the "android.permission.BLUETOOTH_ADMIN" permission). Is one or the other old/obsolete and/or is one technique only available on some devices? or is it just a matter of personal preference as to which I use?

推荐答案

这显然是在Android中的文件

It is clearly mentioned in Android Doc

蓝牙不应该没有直接的用户同意的情况下启用。如果你想以创建无线连接开启蓝牙，你应该使用ACTION_REQUEST_ENABLE意图，这将提高该请求的用户权限打开蓝牙的对话框。仅对于包括一个用户接口，用于改变系统设置，例如功率管理器的应用程序的应用程序所提供的启用（）方法

Bluetooth should never be enabled without direct user consent. If you want to turn on Bluetooth in order to create a wireless connection, you should use the ACTION_REQUEST_ENABLE Intent, which will raise a dialog that requests user permission to turn on Bluetooth. The enable() method is provided only for applications that include a user interface for changing system settings, such as a "power manager" app.

这两种技术是可行的。您有权选择根据您的目的和要求。
希望它回答你的问题。

Both of these techniques would work. You have to choose based on your purpose and requirement. Hope it answers your questions.

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