Add initial bluetooth adapter
Piotro
rodzic
880396b839
commit
943ac36c6e
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@ -4,6 +4,8 @@
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<uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION"/>
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<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION"/>
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<uses-permission android:name="android.permission.BLUETOOTH_CONNECT" />
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<uses-permission android:name="android.permission.BLUETOOTH" />
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<uses-permission android:name="android.permission.INTERNET" />
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<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
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<uses-feature android:name="android.hardware.location.gps" />
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@ -0,0 +1,204 @@
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package eu.piotro.sondechaser.data;
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import android.Manifest;
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import android.annotation.SuppressLint;
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import android.app.Activity;
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import android.bluetooth.BluetoothAdapter;
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import android.bluetooth.BluetoothDevice;
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import android.bluetooth.BluetoothManager;
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import android.bluetooth.BluetoothSocket;
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import android.content.Context;
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import android.content.pm.PackageManager;
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import android.widget.PopupMenu;
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import android.widget.Toast;
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import androidx.core.app.ActivityCompat;
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import java.io.BufferedReader;
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import java.io.IOException;
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import java.io.InputStreamReader;
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import java.io.OutputStreamWriter;
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import java.io.PrintWriter;
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import java.util.Set;
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import java.util.UUID;
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public class BlueAdapter {
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private final Activity rootActivity;
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private final BluetoothAdapter bluetoothAdapter;
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private BluetoothSocket bluetoothSocket;
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private BufferedReader reader;
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private PrintWriter writer;
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private String freqString = "403.000";
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private BluetoothDevice device = null;
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private String deviceAddress = null;
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private int type = 2;
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private static final UUID WELL_KNOWN_SERIAL_UUID = UUID.fromString("00001101-0000-1000-8000-00805F9B34FB");
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public BlueAdapter(Activity rootActivity) {
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this.rootActivity = rootActivity;
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BluetoothManager bluMgr = (BluetoothManager) rootActivity.getBaseContext().getSystemService(Context.BLUETOOTH_SERVICE);
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this.bluetoothAdapter = bluMgr.getAdapter();
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}
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private boolean permissionCheck() {
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if (ActivityCompat.checkSelfPermission(rootActivity, Manifest.permission.BLUETOOTH) != PackageManager.PERMISSION_GRANTED) {
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if(ActivityCompat.shouldShowRequestPermissionRationale(rootActivity, Manifest.permission.BLUETOOTH)) {
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rootActivity.runOnUiThread(()-> Toast.makeText(rootActivity, "No bluetooth permission. Enable in system app settings.", Toast.LENGTH_LONG).show() );
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} else {
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ActivityCompat.requestPermissions(rootActivity, new String[]{Manifest.permission.BLUETOOTH}, 2);
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}
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return false;
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}
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return true;
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}
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public void setDeviceAddress(String menuEntry) {
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if (menuEntry.contains("("))
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deviceAddress = menuEntry.substring(menuEntry.lastIndexOf('(')+1, menuEntry.length()-1);
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}
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public void setFrequency(String freq) {
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freqString = freq.replace(',', '.');
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updateFreq();
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}
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public void setType(String typestr) {
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this.type = Integer.parseInt(typestr.substring(0, typestr.indexOf(':')));
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updateFreq();
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}
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@SuppressLint("MissingPermission")
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private void connectDevice() {
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if (!permissionCheck())
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return;
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if (device == null) {
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if (deviceAddress != null) {
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device = this.bluetoothAdapter.getRemoteDevice(deviceAddress);
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}
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if(device == null)
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return;
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}
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try {
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if (bluetoothSocket != null)
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bluetoothSocket.close();
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try {
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bluetoothSocket = device.createInsecureRfcommSocketToServiceRecord(WELL_KNOWN_SERIAL_UUID);
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} catch (IOException e) {
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// TODO: Replace with status text, or ignore for now in settings is probably enough
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//rootActivity.runOnUiThread(()-> Toast.makeText(rootActivity, "Bluetooth is disabled", Toast.LENGTH_LONG).show() );
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try { Thread.sleep(10000); } catch (InterruptedException ignored) {}
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}
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} catch (IOException e) {
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bluetoothSocket = null;
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e.printStackTrace();
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}
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}
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@SuppressLint("MissingPermission")
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public void connectSocket() {
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if (!permissionCheck())
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return;
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try {
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if (bluetoothSocket != null) {
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bluetoothSocket.connect(); // this fails when device is offline - just silently ignore it
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reader = new BufferedReader(new InputStreamReader(bluetoothSocket.getInputStream()));
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writer = new PrintWriter(new OutputStreamWriter(bluetoothSocket.getOutputStream()));
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updateFreq();
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} else {
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connectDevice();
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}
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} catch (Exception ignored) {}
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}
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public String readLine() {
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if (bluetoothSocket == null || reader == null || !bluetoothSocket.isConnected())
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return null;
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try {
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return reader.readLine();
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} catch (IOException e) {
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e.printStackTrace();
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}
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return null;
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}
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private void updateFreq() {
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if (bluetoothSocket == null || reader == null)
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return;
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String cmd = "o{f="+freqString+"/tipo="+type+"}";
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writer.println(cmd);
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writer.flush(); // <<<
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}
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@SuppressLint("MissingPermission")
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public void fillMenu(Activity activity, PopupMenu menu) {
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if (!permissionCheck())
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return;
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if (!bluetoothAdapter.isEnabled()) {
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menu.getMenu().add("Bluetooth is disabled.");
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menu.getMenu().add("Enable in system settings.");
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return;
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}
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Set<BluetoothDevice> paired = this.bluetoothAdapter.getBondedDevices();
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activity.runOnUiThread(()-> {
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for (BluetoothDevice dev : paired) {
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menu.getMenu().add(dev.getName() + " (" + dev.getAddress() + ")");
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}
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menu.getMenu().add("IF NOT LISTED HERE, PAIR DEVICE");
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menu.getMenu().add("FROM SYSTEM SETTINGS FIRST");
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});
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}
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class BlockedReaderThread implements Runnable {
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private String lastLine;
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@Override
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public void run() {
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for (;;) {
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System.out.println("BTHREAD: loop ");
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String line = readLine(); // this fails in all cases (device offline, closed transmission error)
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if (line == null) {
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System.out.println("BTTHREAD: Reconnect");
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connectSocket();
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try { Thread.sleep(2000); } catch (InterruptedException ignored) {}
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} else {
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System.out.println("BTHREAD: received " + line);
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}
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lastLine = line;
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try { Thread.sleep(200); } catch (InterruptedException ignored) {}
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}
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}
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public String getLine() {
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return lastLine;
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}
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}
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private BlockedReaderThread thread = null;
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public BlockedReaderThread getRunnable() {
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if (thread == null)
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thread = new BlockedReaderThread();
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return thread;
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}
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public boolean isConnected() {
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if (bluetoothSocket == null)
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return false;
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return bluetoothSocket.isConnected();
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}
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// NOTE: whaaaaaaaaa? Disabling BT on phone does not dissconect BtSocket, and it is *even* able to reconnect and continue working
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// after BT is DISABLED. I don't understand that. Streams will close but if socket will remain able to reconnect
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}
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