Smooth communication via bluetooth with other android devices or microcontrollers such as Arduino.

Mantas Palaima

Last update: Nov 28, 2022

Related tags

Bluetooth AndroidSmoothBluetooth

Overview

Android Smooth Bluetooth

Smooth communication via bluetooth with other android devices or microcontrollers such as Arduino.

Getting Started

Add Gradle dependency:

dependencies {
   compile 'io.palaima:smoothbluetooth:0.1.0'
}

Or Download from Maven

You can try the SNAPSHOT version:

dependencies {
   compile 'io.palaima:smoothbluetooth:0.2.0-SNAPSHOT'
}

Make sure to add the snapshot repository:

repositories {
    maven {
        url "https://oss.sonatype.org/content/repositories/snapshots"
    }
}

Usage

1. Declare bluetooth permissions in AndroidManifest.xml

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

2. Define SmoothBluetooth instance

private SmoothBluetooth mSmoothBluetooth;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    mSmoothBluetooth = new SmoothBluetooth(Context context);
}

there are possible overrides:

mSmoothBluetooth = new SmoothBluetooth(Context context, SmoothBluetooth.Listener listener);

mSmoothBluetooth = new SmoothBluetooth(Context context, ConnectionTo connectionTo, Connection connection, SmoothBluetooth.Listener listener);

ConnectionTo defines to what type of device to connect with (by default it is ConnectionTo.OTHER_DEVICE which means microcontrollers like Arduino)

ConnectionTo.ANDROID_DEVICE
ConnectionTo.OTHER_DEVICE

Connection defines what type of connection will be (be default it is Connection.SECURE)

Connection.SECURE
Connection.INSECURE

3. Define SmoothBluetooth.Listener

After that you must define SmoothBluetooth.Listener which catches all bluetooth related events and pass it to SmoothBluetooth constructor when defining its instance or if you already have SmoothBluetooth instance you can pass listener via setter setListener(SmoothBluetooth.Listener listener)

private SmoothBluetooth.Listener mListener = new SmoothBluetooth.Listener() {
    @Override
    public void onBluetoothNotSupported() {
        //device does not support bluetooth
    }

    @Override
    public void onBluetoothNotEnabled() {
        //bluetooth is disabled, probably call Intent request to enable bluetooth
    }

    @Override
    public void onConnecting(Device device) {
        //called when connecting to particular device
    }

    @Override
    public void onConnected(Device device) {
       //called when connected to particular device
    }

    @Override
    public void onDisconnected() {
        //called when disconnected from device
    }

    @Override
    public void onConnectionFailed(Device device) {
        //called when connection failed to particular device
    }

    @Override
    public void onDiscoveryStarted() {
        //called when discovery is started
    }

    @Override
    public void onDiscoveryFinished() {
        //called when discovery is finished
    }

    @Override
    public void onNoDevicesFound() {
        //called when no devices found
    }

    @Override
    public void onDevicesFound(final List<Device> deviceList,
            final BluetoothHelper.ConnectionCallback connectionCallback) {
        //receives discovered devices list and connection callback
        //you can filter devices list and connect to specific one
        //connectionCallback.connectTo(deviceList.get(position));
    }

    @Override
    public void onDataReceived(int data) {
        //receives all bytes
    }
};

4. Try to connect

After everything is set up and all is left to do is try to connect

mSmoothBluetooth.tryConnection();

tryConnection() is linked with SmoothBluetooth.Listener so all connection events will be passed to listener. By default if everything is ok, immediately returns all paired devices to SmoothBluetooth.Listener's onDevicesFound

5. Discovering

mSmoothBluetooth.doDiscovery();

Call doDiscovery() method which search for unpaired devices and returns them to SmoothBluetooth.Listener's onDevicesFound

6. Sending data

mSmoothBluetooth.send(byte[] data, boolean CRLF);

mSmoothBluetooth.send(String data, boolean CRLF);

boolean CRLF indicates if data is need to be send with ending by LF and CR or not. if you do not need CRLF at the end there are some overrides with CRLF = false

mSmoothBluetooth.send(byte[] data);
mSmoothBluetooth.send(String data);

6. Disconnect

mSmoothBluetooth.disconnect();

7. Do not forget to stop

For instance in your activity where SmoothBluetooth is defined you must call stop()

@Override
protected void onDestroy() {
    super.onDestroy();
    mSmoothBluetooth.stop();
}

Sample

You can clone the project and compile it yourself (it includes a sample). MainActivity

Contributing

Want to contribute? You are welcome! Note that all pull request should go to dev branch.

Developed By

Mantas Palaima - [email protected]

Credits

Credit to Aidan Follestad's Material Dialogs library.

License

Copyright 2015 Mantas Palaima.

Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at

   http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.

Comments

Added autoconnect method

I am using my fork in a project so if you want to accept this pr just let me know and I will change the installation link in Readme file. Meanwhile, if someone wants to use this method see my fork.

opened by yashx 0
In android arsenal DeviceAdapter raises a proble due to incorrect usage.

Use it in this way might solve the issue.

new MaterialDialog.Builder(this) .title(R.string.socialNetworks) // second parameter is an optional layout manager. Must be a LinearLayoutManager or GridLayoutManager. .adapter(new ButtonItemAdapter(this, R.array.socialNetworks), null) .show();

opened by Justnowstarted 0
No way to connect to a specific device

Not always do we want to let the device connect to just any device found around.

Most of the applications would need to connect to specific devices around, may it be user's choice or preconfigured to control one specific device.

opened by tfKamran 0
Problem to connect : no BluetoothService while connect method is called
I read your source code to understand why it does not connect smoothly and I found that no BluetoothService is avalaible before you call connect(), but for the case of a server you don't have to need to search and try to pair to another device. The client has to connect to the server. Example : device1 is my server, device2 is my client. Device1 is visible, device2 tries to connect to device1 but it fails. We can repeat this operation several times it will always fail. But if device1 tries to connect to device2 it will work because both have called connect(), so both have already a BluetoothService instance. My solution is to add these lines

if (!isServiceAvailable()) { setupService(); } startService(mIsAndroid, mIsSecure);

in the end of the constructor, and it works correctly (I already tested it).

Hope it will help LAcrym0
opened by remi-ollivier 0
Failed to connect

Hello sir, I am very new to android and I tried using your library. After selecting the desired bluetooth device I am getting the same result "Failed to connect to device". as shown in your documentation, I also tried to connect to an android phone by setting connectionto.Android devices in the constructor, but all in vain. Can you please help?

opened by tanveer27 0