CODEWITHSUNDEEP
c#androidunity-game-enginepluginsbluetooth
user3102664
user3102664

Reputation: 119

How to turn on bluetooth

I am trying to do bluetooth communication in unity project through android plugin and at the beginning I want to turn on bluetooth.

The java code look like this

package com.example.unityplugin;

import android.bluetooth.BluetoothAdapter;

public class PluginClass {
public static String testMessage(){
    return "I AM WORKING";
}

public static String TurnOnBluetooth(){
    BluetoothAdapter bluetoothAdapter = BluetoothAdapter.getDefaultAdapter();
    if (bluetoothAdapter != null) {
        if (!bluetoothAdapter.isEnabled()) {
            bluetoothAdapter.enable();
            return "BLUETOOTH ON";
        } else {
            return "WAS ON";
        }
    }
    return "no bluetooth adapter";
}

}

And in Unity is as simple as

void Start () {
    textMEsh = GetComponent<TextMesh>();
    var plugin = new AndroidJavaClass("com.example.unityplugin.PluginClass");
    textMEsh.text = plugin.CallStatic<string>("testMessage");
    textMEsh.text = plugin.CallStatic<string>("TurnOnBluetooth");
}

So the text displaying in app changes after first method "testMessage" to "I AM WORKING" but then nothing happens and I don't really understand why. Bluetooth is not turning on and I see the following error from the log:

I/Unity: AndroidJavaException: java.lang.SecurityException: Need BLUETOOTH ADMIN permission: Neither user 10069 nor current process has android.permission.BLUETOOTH_ADMIN.

How should I properly set that permission in Unity?

Upvotes: 3

Views: 2880

Answers (1)

Programmer
Programmer

Reputation: 125245

That's a permission error. You need to add the bluetooth permission into Unity.

1.Go to <UnityInstallationDirecory>\Editor\Data\PlaybackEngines\AndroidPlayer\Apk, Copy the AndroidManifest.xml file to your <ProjectName>Assets\Plugins\Android.

If <ProjectName>Assets\Plugins\Android doesn't exist yet, create it. The spelling of the folder is case sensitive and must be spelt right.

2.Open the copied Manifest file from <ProjectName>Assets\Plugins\Android and add your manifest.

Add the following permission to it:

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

3.Save the AndroidManifest modification, Build and Run.

Unity will now include the bluetooth permission in the final build.

Upvotes: 3

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