以编程方式在 Android 上启用蓝牙 [英] Programmatically enabling bluetooth on Android

问题描述

我正在尝试确定在 Android 上以编程方式启用蓝牙的首选方式.我发现以下任一技术都有效(至少在 Android 4.0.4 上...):

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();

前者在启用前询问用户许可，而后者只是默默启用蓝牙(但需要android.permission.BLUETOOTH_ADMIN"许可).一种或另一种旧/过时和/或一种技术仅在某些设备上可用吗?或者这只是我个人喜好的问题?

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

Android 中明确提到 文档

It is clearly mentioned in Android Doc

未经用户直接同意，不得启用蓝牙.如果您想打开蓝牙以创建无线连接，您应该使用 ACTION_REQUEST_ENABLE 意图，这将引发一个对话框，请求用户允许打开蓝牙.enable() 方法仅适用于包含用于更改系统设置的用户界面的应用程序，例如电源管理器"应用程序.

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.

这两种技术都行.您必须根据您的目的和要求进行选择.希望它能回答您的问题.

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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