打开和关闭蓝牙？

Question

是否有一个简单的教程或者有人有代码可以使用 Android 的 Eclipse 构建中的切换按钮打开和关闭蓝牙？

如果有人可以提供帮助，我们将不胜感激。

-提前致谢。

Answer 1

您需要

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

在清单文件中添加以下变量：

private final integer REQUEST_ENABLE_BT = 1;

以便

BluetoothAdapter mBluetoothAdapter = BluetoothAdapter.getDefaultAdapter();
boolean hasBluetooth = (mBluetoothAdapter == null);

在 OnCreate 中您可以执行以下操作：

final ToggleButton togglebutton = (ToggleButton) findViewById(R.id.togglebutton);
togglebutton.setOnClickListener(new OnClickListener()
{
  public void onClick(View v)
  {
    // Perform action on clicks
    if (togglebutton.isChecked())
    {
      if (hasBluetooth && !mBluetoothAdapter.isEnabled())
      {
        // prompt the user to turn BlueTooth on
        Intent enableBtIntent = new Intent(BluetoothAdapter.ACTION_REQUEST_ENABLE);
        startActivityForResult(enableBtIntent, REQUEST_ENABLE_BT);
      }
    }
    else
    {
      if (hasBluetooth && mBluetoothAdapter.isEnabled())
      {
        // you should really prompt the user for permission to turn
        // the BlueTooth off as well, e.g., with a Dialog
        boolean isDisabling = mBluetoothAdapter.disable();
        if (!isDisabling)
        {
           // an immediate error occurred - perhaps the bluetooth is already off?
        }
      }
    }
  }
});

用户对“打开蓝牙”提示的响应被捕获在

protected void onActivityResult (int requestCode, int resultCode, Intent data)
{
  if ((requestCode == REQUEST_ENABLE_BT) && (resultCode == RESULT_OK))
  {
    boolean isEnabling = mBluetoothAdapter.enable();
    if (!isEnabling)
    {
      // an immediate error occurred - perhaps the bluetooth is already on?
    }
    else if (mBluetoothAdapter.getState() == BluetoothAdapter.STATE_TURNING_ON)
    {
      // the system, in the background, is trying to turn the Bluetooth on
      // while your activity carries on going without waiting for it to finish;
      // of course, you could listen for it to finish yourself - eg, using a
      // ProgressDialog that checked mBluetoothAdapter.getState() every x
      // milliseconds and reported when it became STATE_ON (or STATE_OFF, if the
      // system failed to start the Bluetooth.)
    }
  }
}

Answer 2

看看 http://developer.android.com/reference/android/bluetooth /蓝牙适配器.html

BluetoothAdapter adapter = BluetoothAdapter.getDefaultAdapter(); 
if(adapter != null) {
    if(adapter.getState() == BluetoothAdapter.STATE_ON) {
        adapter.disable();
    } else if (adapter.getState() == BluetoothAdapter.STATE_OFF){
        adapter.enable();
    } else {
        //State.INTERMEDIATE_STATE;
    } 
}

Answer 3

试试这个

public void disableBluetooth(Context context, Boolean bool) {
    WifiManager wifiManager = (WifiManager) context.getSystemService(Context.WIFI_SERVICE);

    if(bool)
        wifiManager.setWifiEnabled(false);
    else
        wifiManager.setWifiEnabled(true);
}

Answer 4

BluetoothAdapter mBluetooth = BluetoothAdapter.getDefaultAdapter();
Integer bluetooth = 1; // Turn on
Object nada = (bluetooth == 1 ? mBluetooth.enable() : mBluetooth.disable());

显现：

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

Answer 5

下载此示例，这将帮助您

https://github.com/siddhpuraamitr/Blutooth-Toggle-Widget< /a>

Answer 6

如果您在 Android 33 中遇到问题，请阅读我，

我今天花了很多时间来解决这个问题，因为这是谷歌搜索的顶部，这里是如何创建一个按钮，要求在 Android 33 中打开/关闭蓝牙。答案是在科特林中
添加一个名为 android:id="@+id/requestBlueToothButton" 的按钮

AndroidManifest.xml 将需要以下行

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

requestBlueToothButton.setOnClickListener {
                val bluetoothManager: BluetoothManager? = getSystemService(requireContext(), BluetoothManager::class.java)
                val bluetoothAdapter: BluetoothAdapter? = bluetoothManager?.getAdapter()
                if (bluetoothAdapter == null) {
                    // Device doesn't support Bluetooth
                }
                if (bluetoothAdapter?.isEnabled == false) {
                    val enableBtIntent = Intent(BluetoothAdapter.ACTION_REQUEST_ENABLE)
                    startActivity(enableBtIntent)
                }
            }

来源