【Android】请求打开蓝牙和定位功能

    private fun checkLocationSetting() {
        if (!LocationSetting.isEnabled(this)) {
            runOnUiThread {
                LocationSetting.askToActivate(this)
            }
        }
    }
    
    
      
      
      
      
      
      
      
    
    代码解释

    import android.app.AlertDialog
    import android.content.Context
    import android.content.Context.LOCATION_SERVICE
    import android.content.Intent
    import android.location.LocationManager
    import android.os.Build
    import android.provider.Settings
    import android.provider.Settings.SettingNotFoundException
    import android.util.Log
    
    object LocationSetting {
    private val TAG: String = LocationSetting::class.java.simpleName
    
    fun isEnabled(context: Context): Boolean {
        var enabled = false
        try {
            val locationManager = context.getSystemService(LOCATION_SERVICE) as LocationManager
            enabled = if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.P) {
                locationManager.isLocationEnabled
            } else {
                Settings.Secure.getInt(context.contentResolver,
                    Settings.Secure.LOCATION_MODE) != Settings.Secure.LOCATION_MODE_OFF
            }
        } catch (e: SettingNotFoundException) {
            Log.e(TAG, "Cannot check GPS status: " + e.message, e)
        }
        return enabled
    }
    
    fun askToActivate(context: Context) {
        AlertDialog.Builder(context)
            .setTitle("GPS activation")
            .setMessage("From Android 6, GPS needs to be enabled to find nearby BLE devices.")
            .setCancelable(false)
            .setPositiveButton("Fix") { _, _ ->
                val onGPS = Intent(Settings.ACTION_LOCATION_SOURCE_SETTINGS)
                context.startActivity(onGPS)
            }
            .show()
    }
    }
    
    
      
      
      
      
      
      
      
      
      
      
      
      
      
      
      
      
      
      
      
      
      
      
      
      
      
      
      
      
      
      
      
      
      
      
      
      
      
      
      
      
      
    
    代码解释

    var bluetoothAdapter = BluetoothAdapter.getDefaultAdapter()
    if (bluetoothAdapter != null && !bluetoothAdapter.isEnabled) {
    // Method1
    //    bluetoothAdapter.enable()
    // Method2
    val enableBtIntent = Intent(BluetoothAdapter.ACTION_REQUEST_ENABLE)
    startActivity(enableBtIntent)
    }
    
    
      
      
      
      
      
      
      
      
    
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