added usbserial lib

LICENSE

@@ -1,73 +0,0 @@
-Apache License
-Version 2.0, January 2004
-http://www.apache.org/licenses/
-
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README.md

@@ -1,22 +1,2 @@
 # ExternGnss
 
-Display smartphone GNSS data and external GNSS from a serial module via OTG. Show distance between the both fixes. 
-
-<img src="https://git.mosad.xyz/localhorst/ExternGnss/raw/commit/a3b6942042d46e244439895a88e1d3977fae371f/Screenshot_20220425-213544_ExternGNSS.png" height="500">
-
-## Used Libs
-[usb-serial-for-android](https://github.com/mik3y/usb-serial-for-android) as the OTG serial driver.
-
-## External GNSS module
-For testing a Ublox NEO 8 was used with a FTDI FT232R. Just connect the TX/RX pairs and select 5V for the module.
-- [FTDI FT232R](https://www.ebay.com/itm/165323481324)
-- [Ublox NEO 8 GNSS](https://de.aliexpress.com/item/4000597350406.html)
-
-## Tip for USB-free ADB connection
-- connect the device via USB
-- set the adb server to network debugging: `adb tcpip 5555`
-- get the device IP address: `adb shell ip addr show wlan0`
-- connecy the device via network: `adb connect ip-address-of-device:5555`
-- verify the network connection: `adb devices`
-- unplug the USB cable from device
-- the device should still be attached via network to adb

app/build.gradle

@@ -4,7 +4,7 @@ android {
     compileSdkVersion 30
     defaultConfig {
         applicationId "hendrikschutter.com.externgnss"
-        minSdkVersion 19
+        minSdkVersion 17
         targetSdkVersion 30
         versionCode 1
         versionName "1.0"
@@ -27,5 +27,5 @@ dependencies {
     testImplementation 'junit:junit:4.12'
     androidTestImplementation 'androidx.test.ext:junit:1.1.1'
     androidTestImplementation 'androidx.test.espresso:espresso-core:3.4.0'
-    implementation 'com.github.mik3y:usb-serial-for-android:3.4.3'
+    implementation 'com.github.mik3y:usb-serial-for-android:3.4.4'
 }

app/src/main/AndroidManifest.xml

@@ -4,7 +4,6 @@
 
     <uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />
     <uses-permission android:name="android.permission.INTERNET" />
-    <uses-permission android:name="android." />
 
     <application
         android:allowBackup="true"
@@ -17,14 +16,9 @@
             android:exported="true">
             <intent-filter>
                 <action android:name="android.intent.action.MAIN" />
+
                 <category android:name="android.intent.category.LAUNCHER" />
             </intent-filter>
-            <intent-filter>
-                <action android:name="android.hardware.usb.action.USB_DEVICE_ATTACHED" />
-            </intent-filter>
-            <meta-data
-                android:name="android.hardware.usb.action.USB_DEVICE_ATTACHED"
-                android:resource="@xml/usb_serial_devices"/>
         </activity>
     </application>
 

app/src/main/java/hendrikschutter/com/externgnss/ExternGNSS.java

@@ -0,0 +1,65 @@
+package hendrikschutter.com.externgnss;
+
+import android.content.Context;
+import android.hardware.usb.UsbDeviceConnection;
+import android.hardware.usb.UsbManager;
+import android.util.Log;
+import android.widget.EditText;
+
+import com.hoho.android.usbserial.driver.UsbSerialDriver;
+import com.hoho.android.usbserial.driver.UsbSerialPort;
+import com.hoho.android.usbserial.driver.UsbSerialProber;
+import com.hoho.android.usbserial.util.SerialInputOutputManager;
+
+import java.io.IOException;
+import java.util.List;
+
+
+
+public class ExternGNSS implements SerialInputOutputManager.Listener {
+    private MainActivity uiactivity;
+    ExternGNSS(UsbManager manager, MainActivity mainactivity) {
+        Log.i("HAG", "init extern gnss");
+    this.uiactivity = mainactivity;
+        // Find all available drivers from attached devices.
+        List<UsbSerialDriver> availableDrivers = UsbSerialProber.getDefaultProber().findAllDrivers(manager);
+        if (availableDrivers.isEmpty()) {
+            return;
+        }
+
+        // Open a connection to the first available driver.
+        UsbSerialDriver driver = availableDrivers.get(0);
+        UsbDeviceConnection connection = manager.openDevice(driver.getDevice());
+        if (connection == null) {
+            // add UsbManager.requestPermission(driver.getDevice(), ..) handling here
+            return;
+        }
+
+        UsbSerialPort port = driver.getPorts().get(0); // Most devices have just one port (port 0)
+        try {
+            port.open(connection);
+            port.setParameters(9600, 8, UsbSerialPort.STOPBITS_1, UsbSerialPort.PARITY_NONE);
+
+            SerialInputOutputManager usbIoManager = new SerialInputOutputManager(port, this);
+            usbIoManager.start();
+
+        } catch (IOException e) {
+            e.printStackTrace();
+        }
+    }
+
+    @Override
+    public void onNewData(byte[] data) {
+        //runOnUiThread(() -> { textView.append(new String(data)); });
+        Log.i("HAG", new String(data));
+        if( this.uiactivity != null){
+            this.uiactivity.setExternGnss(new String(data));
+        }
+    }
+
+    @Override
+    public void onRunError(Exception e) {
+
+    }
+
+}

app/src/main/java/hendrikschutter/com/externgnss/MainActivity.java

@@ -2,57 +2,41 @@ package hendrikschutter.com.externgnss;
 
 import android.Manifest;
 import android.annotation.SuppressLint;
-import android.app.AlertDialog;
 import android.content.Context;
-import android.content.DialogInterface;
+import android.hardware.usb.UsbManager;
-import android.graphics.Color;
 import android.location.LocationListener;
 import android.location.LocationManager;
-
 import androidx.appcompat.app.AppCompatActivity;
-
 import android.os.Bundle;
 import android.util.Log;
-import android.view.View;
 import android.widget.EditText;
 import android.widget.TextView;
 import android.widget.Toast;
-
 import pub.devrel.easypermissions.AfterPermissionGranted;
 import pub.devrel.easypermissions.EasyPermissions;
-
 import static java.lang.Thread.sleep;
 
-import com.google.android.material.floatingactionbutton.FloatingActionButton;
-
-import java.util.concurrent.BlockingQueue;
-import java.util.concurrent.LinkedBlockingQueue;
-
 public class MainActivity extends AppCompatActivity {
     private TextView output;
-    private LocationManager locationManager = null;
+    private LocationManager locationManager;
-    private SerialUSB serialUSB = null;
-    private NMEAParser nmeaParser = null;
     private boolean doRun = true;
     private final Context cntxToastInternGNSSUpdate = this;
-    final String[] perms = {Manifest.permission.ACCESS_FINE_LOCATION, Manifest.permission.INTERNET,};
+    final String[] perms = {Manifest.permission.ACCESS_FINE_LOCATION, Manifest.permission.INTERNET};
-    private static final String INTENT_ACTION_GRANT_USB = BuildConfig.APPLICATION_ID + ".GRANT_USB";
     private boolean bChange = true;
-    private BlockingQueue<Byte> rawSerialByteDataQueue = null;
+
-    private double lastInternFixLat, lastInternFixLon;
-    private MainActivity activity = this;
     @Override
     public void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
         setContentView(R.layout.activity_main);
+        startLocationInit();
+        UsbManager manager = (UsbManager) getSystemService(Context.USB_SERVICE);
+        Log.i("HAG", "init app");
+        ExternGNSS tmp = new ExternGNSS(manager, this);
 
-        // start intern GNSS and display stats on UI
-        startInternGNSS();
-
-        // start extern GNSS and display stats on UI
-        startExternGNSS();
     }
 
+
+
     // From https://github.com/googlesamples/easypermissions
     @Override
     public void onRequestPermissionsResult(int requestCode, String[] permissions, int[] grantResults) {
@@ -61,51 +45,19 @@ public class MainActivity extends AppCompatActivity {
         EasyPermissions.onRequestPermissionsResult(requestCode, permissions, grantResults, this);
     }
 
-
-    private void startExternGNSS() {
-        rawSerialByteDataQueue = new LinkedBlockingQueue<>();
-        serialUSB = new SerialUSB(this, rawSerialByteDataQueue);
-        nmeaParser = new NMEAParser();
-
-        if (serialUSB.findSerialDevice()) {
-            serialUSB.connect(9600, 0);
-            if (serialUSB.isConnected()) {
-                nmeaParser.setReceiveByteStream(rawSerialByteDataQueue);
-
-                ((FloatingActionButton)findViewById(R.id.floatingActionButtonExternGnssInfo)).setOnClickListener(new View.OnClickListener() {
-                    @Override
-                    public void onClick(View view) {
-                        String otgInfo = "OTG-Info:\n  Vendor: " + serialUSB.getUsbDeviceVendorId()+ "" +
-                                "\n  Device: " + serialUSB.getDeviceId() +
-                                "\n  Baudrate: " + String.valueOf(serialUSB.getBaudRate() +
-                                "\n\nNMEA:\n  Sentences: " + String.valueOf(nmeaParser.getSentenceCounter()));
-                        AlertDialog.Builder builder = new AlertDialog.Builder(activity);
-                        builder.setMessage(otgInfo)
-                                .setPositiveButton("Close", new DialogInterface.OnClickListener() {
-                                    public void onClick(DialogInterface dialog, int id) {
-                                    }
-                                });
-                        builder.create().show();
-                    }
-                });
-            }
-        }
-    }
-
     @AfterPermissionGranted(123)
-    private void startInternGNSS() {
+    private void startLocationInit() {
         if (EasyPermissions.hasPermissions(this, perms)) {
             // Already have permission, do the thing
             Toast.makeText(cntxToastInternGNSSUpdate, "Permission granted!", Toast.LENGTH_SHORT).show();
-            locationManager = (LocationManager) getSystemService(Context.LOCATION_SERVICE);
+
         } else {
             // Do not have permissions, request them now
-            EasyPermissions.requestPermissions(this, "We require location access!",
+            EasyPermissions.requestPermissions(this, "We require location access!!!",
                     123, perms);
         }
     }
 
-
     private void setEditTextLabel(final EditText v, final String str) {
         Runnable myRun = new Runnable() {
             public void run() {
@@ -115,28 +67,23 @@ public class MainActivity extends AppCompatActivity {
         runOnUiThread(myRun);
     }
 
-    private void setTextViewLabel(final TextView v, final String str) {
+    public void setExternGnss( final String str) {
         Runnable myRun = new Runnable() {
             public void run() {
-                v.setText(str);
+                final TextView v =  (TextView) findViewById(R.id.externGNSSTextView);
+                v.append(str);
             }
         };
         runOnUiThread(myRun);
     }
 
-
-
     @SuppressLint("MissingPermission")
     @Override
     protected void onResume() {
         super.onResume();
-        setInternGnssUiNoSignal();
-        setExternGnssUiNoSignal();
-        setInternGnssUiColor(Color.GRAY);
-        setExternGnssUiColor(Color.GRAY);
-
         if (!EasyPermissions.hasPermissions(this, perms)) {
             // Dummy thread ...
+            /*
             new Thread(new Runnable() {
                 @Override
                 public void run() {
@@ -150,58 +97,40 @@ public class MainActivity extends AppCompatActivity {
                     }
                 }
             }).start();
+             */
         } else {
-            locationManager.requestLocationUpdates(LocationManager.GPS_PROVIDER, 0, 0, locationListener);
+            if(locationManager != null){
+                locationManager.requestLocationUpdates(LocationManager.GPS_PROVIDER, 0, 0, locationListener);
+            }
+
             // Worker-Thread
             new Thread(
                     new Runnable() {
                         @Override
                         public void run() {
-                            while (doRun) {
+                            while (doRun && (locationManager != null)) {
                                 if (locationManager.getLastKnownLocation(LocationManager.GPS_PROVIDER) != null) {
-                                    setInternGnssUiColor(Color.BLACK);
+                                    setEditTextLabel((EditText) findViewById(R.id.interngnssLatNumber), String.format( "%.6f", locationManager.getLastKnownLocation(LocationManager.GPS_PROVIDER).getLatitude()));
-                                    lastInternFixLat = locationManager.getLastKnownLocation(LocationManager.GPS_PROVIDER).getLatitude();
+                                    setEditTextLabel((EditText) findViewById(R.id.interngnssLongNumber), String.format( "%.6f", locationManager.getLastKnownLocation(LocationManager.GPS_PROVIDER).getLongitude()));
-                                    lastInternFixLon = locationManager.getLastKnownLocation(LocationManager.GPS_PROVIDER).getLongitude();
+                                    setEditTextLabel((EditText) findViewById(R.id.interngnssAltitudeNumber), String.format( "%.2f", locationManager.getLastKnownLocation(LocationManager.GPS_PROVIDER).getAltitude()) + " m");
-                                    setEditTextLabel((EditText) findViewById(R.id.interngnssLatNumber), String.format("%.6f", lastInternFixLat));
+                                    setEditTextLabel((EditText) findViewById(R.id.interngnssAccuracyNumber), String.format( "%.2f", locationManager.getLastKnownLocation(LocationManager.GPS_PROVIDER).getAccuracy()) + " m");
-                                    setEditTextLabel((EditText) findViewById(R.id.interngnssLongNumber), String.format("%.6f", lastInternFixLon));
-                                    setEditTextLabel((EditText) findViewById(R.id.interngnssAltitudeNumber), String.format("%.2f", locationManager.getLastKnownLocation(LocationManager.GPS_PROVIDER).getAltitude()) + " m");
-                                    setEditTextLabel((EditText) findViewById(R.id.interngnssAccuracyNumber), String.format("%.2f", locationManager.getLastKnownLocation(LocationManager.GPS_PROVIDER).getAccuracy()) + " m");
                                     setEditTextLabel((EditText) findViewById(R.id.interngnssSatCountNumber), Integer.toString(locationManager.getLastKnownLocation(LocationManager.GPS_PROVIDER).getExtras().getInt("satellites")));
 
-                                } else {
+                                }else{
-                                    setInternGnssUiColor(Color.GRAY);
+                                    setEditTextLabel((EditText) findViewById(R.id.interngnssLatNumber), "no signal");
-                                    setInternGnssUiNoSignal();
+                                    setEditTextLabel((EditText) findViewById(R.id.interngnssLongNumber), "no signal");
-                                    setEditTextLabel((EditText) findViewById(R.id.diffGNSSDistanceNumber), "no data");
+                                    setEditTextLabel((EditText) findViewById(R.id.interngnssAltitudeNumber), "no signal");
+                                    setEditTextLabel((EditText) findViewById(R.id.interngnssAccuracyNumber), "no signal");
+                                    setEditTextLabel((EditText) findViewById(R.id.interngnssSatCountNumber),"no signal");
                                 }
-
+                                runOnUiThread(new Runnable() {
-                                if ((serialUSB != null) && (nmeaParser != null)) {
+                                    @Override
-                                    if (serialUSB.isConnected()) {
+                                    public void run() {
-                                        setTextViewLabel((TextView) findViewById(R.id.externgnssNameTextView), "Extern GNSS receiver");
+                                        //Update
-                                        nmeaParser.handleReceiveByteStream();
-                                        if (nmeaParser.checkFix() == true) {
-                                            setExternGnssUiColor(Color.BLACK);
-                                            //Log.i("ExternGNSS", "Fix! Lat: " + String.valueOf(nmeaParser.getLatitude()) + " Lon: " + String.valueOf(nmeaParser.getLongitude()));
-                                            setEditTextLabel((EditText) findViewById(R.id.externgnssLatNumber), String.format("%.6f", nmeaParser.getLatitude()));
-                                            setEditTextLabel((EditText) findViewById(R.id.externgnssLongNumber), String.format("%.6f", nmeaParser.getLongitude()));
-                                            setEditTextLabel((EditText) findViewById(R.id.externgnssSatCountNumber), Integer.toString(nmeaParser.getSatCount()));
-                                        }
-                                    } else {
-                                        setTextViewLabel((TextView) findViewById(R.id.externgnssNameTextView), "Extern GNSS receiver (offline)");
-                                        setExternGnssUiColor(Color.GRAY);
-                                        setExternGnssUiNoSignal();
-                                        setEditTextLabel((EditText) findViewById(R.id.diffGNSSDistanceNumber), "no data");
                                     }
-
+                                });
-                                    if ((locationManager.getLastKnownLocation(LocationManager.GPS_PROVIDER) != null) && (serialUSB != null) && (nmeaParser != null)) {
-                                        if (nmeaParser.checkFix() == true) {
-                                            setEditTextLabel((EditText) findViewById(R.id.diffGNSSDistanceNumber), String.format("%.6f", nmeaParser.calcDistance(lastInternFixLat, lastInternFixLon)) + " m");
-                                        }
-                                    } else {
-                                        setEditTextLabel((EditText) findViewById(R.id.diffGNSSDistanceNumber), "no signal");
-                                    }
-                                }
                                 try {
-                                    sleep(1000);
+                                    sleep(10000);
                                 } catch (InterruptedException e) {
                                     e.printStackTrace();
                                 }
@@ -220,55 +149,19 @@ public class MainActivity extends AppCompatActivity {
         doRun = false;
     }
 
-    private void setInternGnssUiColor(int color){
-        ((TextView) findViewById(R.id.interngnssLatTextView)).setTextColor(color);
-        ((TextView) findViewById(R.id.interngnssLongTextView)).setTextColor(color);
-        ((TextView) findViewById(R.id.interngnssAccuracyTextView)).setTextColor(color);
-        ((TextView) findViewById(R.id.interngnssAltitudeTextView)).setTextColor(color);
-        ((TextView) findViewById(R.id.interngnssSatCountTextView)).setTextColor(color);
-
-        ((EditText) findViewById(R.id.interngnssLatNumber)).setTextColor(color);
-        ((EditText) findViewById(R.id.interngnssLongNumber)).setTextColor(color);
-        ((EditText) findViewById(R.id.interngnssAccuracyNumber)).setTextColor(color);
-        ((EditText) findViewById(R.id.interngnssAltitudeNumber)).setTextColor(color);
-        ((EditText) findViewById(R.id.interngnssSatCountNumber)).setTextColor(color);
-    }
-
-    private void setExternGnssUiColor(int color){
-        ((TextView) findViewById(R.id.externgnssLatTextView)).setTextColor(color);
-        ((TextView) findViewById(R.id.externgnssLongTextView)).setTextColor(color);
-        ((TextView) findViewById(R.id.externgnssSatCountTextView)).setTextColor(color);
-
-        ((EditText) findViewById(R.id.externgnssLatNumber)).setTextColor(color);
-        ((EditText) findViewById(R.id.externgnssLongNumber)).setTextColor(color);
-        ((EditText) findViewById(R.id.externgnssSatCountNumber)).setTextColor(color);
-    }
-
-    private void setInternGnssUiNoSignal(){
-        setEditTextLabel((EditText) findViewById(R.id.interngnssLatNumber), "no signal");
-        setEditTextLabel((EditText) findViewById(R.id.interngnssLongNumber), "no signal");
-        setEditTextLabel((EditText) findViewById(R.id.interngnssAltitudeNumber), "no signal");
-        setEditTextLabel((EditText) findViewById(R.id.interngnssAccuracyNumber), "no signal");
-        setEditTextLabel((EditText) findViewById(R.id.interngnssSatCountNumber), "no signal");
-    }
-
-    private void setExternGnssUiNoSignal(){
-        setEditTextLabel((EditText) findViewById(R.id.externgnssLatNumber), "no signal");
-        setEditTextLabel((EditText) findViewById(R.id.externgnssLongNumber), "no signal");
-        setEditTextLabel((EditText) findViewById(R.id.externgnssSatCountNumber), "no signal");
-        setEditTextLabel((EditText) findViewById(R.id.diffGNSSDistanceNumber), "no signal");
-    }
-
     LocationListener locationListener = new LocationListener() {
         @Override
         public void onLocationChanged(android.location.Location location) {
+            //double latitude = location.getLatitude();
+            //double longitude = location.getLongitude();
+            //String msg = "New Latitude: " + latitude + " New Longitude: " + longitude;
             Toast.makeText(cntxToastInternGNSSUpdate, "Internal GNSS updated", Toast.LENGTH_LONG).show();
         }
 
-        @Override
+       @Override
         // This callback will never be invoked on Android Q and above.
         public void onStatusChanged(String provider, int status, Bundle extras) {
-            // Toast.makeText(mContext, "Status Changed", Toast.LENGTH_LONG).show();
+           // Toast.makeText(mContext, "Status Changed", Toast.LENGTH_LONG).show();
         }
 
         @Override

app/src/main/java/hendrikschutter/com/externgnss/NMEAParser.java

@@ -1,128 +0,0 @@
-package hendrikschutter.com.externgnss;
-
-import android.util.Log;
-
-import java.io.BufferedReader;
-import java.io.ByteArrayInputStream;
-import java.io.ByteArrayOutputStream;
-import java.io.IOException;
-import java.io.InputStreamReader;
-import java.nio.charset.StandardCharsets;
-import java.util.Iterator;
-import java.util.List;
-import java.util.concurrent.BlockingQueue;
-
-public class NMEAParser {
-    private double latitude;
-    private double longitude;
-    private boolean fix;
-    private int satCount;
-    private int sentenceCounter;
-    private BlockingQueue<Byte> rawByteData = null;
-
-    public NMEAParser() {
-        this.fix = false;
-        this.satCount = 0;
-        this.latitude = 0;
-        this.longitude = 0;
-        this.sentenceCounter = 0;
-    }
-
-    public void setReceiveByteStream(BlockingQueue<Byte> rawData) {
-        this.rawByteData = rawData;
-    }
-
-    /**
-     * find strings in raw data and sent them to parse
-     */
-    public void handleReceiveByteStream() {
-        String nmeaSentence;
-        ByteArrayOutputStream rawDataByteStream = new ByteArrayOutputStream();
-
-        //wait for sufficient data in buffer TODO don't do this block wise, losing data in edge
-        if (this.rawByteData.size() > 512) {
-            for (Iterator<Byte> rawByte = this.rawByteData.iterator(); rawByte.hasNext(); ) {
-                rawDataByteStream.write(rawByte.next());
-                rawByte.remove(); //remove this data from stream
-            }
-            ByteArrayInputStream stream = new ByteArrayInputStream(rawDataByteStream.toByteArray());
-            InputStreamReader streamReader = new InputStreamReader(stream, StandardCharsets.US_ASCII);
-            BufferedReader bufferedReader = new BufferedReader(streamReader);
-
-            try {
-                while ((nmeaSentence = bufferedReader.readLine()) != null) {
-                    //Log.i("NMEAParser", nmeaSentence);
-                    this.parseSentence(nmeaSentence);
-                }
-            } catch (IOException e) {
-                e.printStackTrace();
-            }
-        } else {
-            //Log.i("NMEAParser", "wait for more data in buffer");
-        }
-    }
-
-    public int getSentenceCounter(){
-        return this.sentenceCounter;
-    }
-
-    public void parseSentence(String sentence) {
-        this.sentenceCounter++;
-        if (sentence.startsWith("$GNGLL")) {
-            parseGNGLL(sentence);
-        }
-        if (sentence.startsWith("$GPGSV")) {
-            parseGPGSV(sentence);
-        }
-    }
-
-    private void parseGNGLL(String sentence) {
-        if (sentence.length() >= 45) {
-            if (sentence.substring(44, 45).equals("A")) {
-                this.fix = true;
-                this.latitude = (Double.parseDouble(sentence.substring(9, 17)) / 60) + Double.parseDouble(sentence.substring(7, 9));
-                this.longitude = (Double.parseDouble(sentence.substring(23, 30)) / 60) + Double.parseDouble(sentence.substring(20, 23));
-            } else {
-                this.fix = false;
-            }
-        }
-    }
-
-    private void parseGPGSV(String sentence) {
-        if (sentence.length() >= 13) {
-            this.satCount = (Integer.parseInt(sentence.substring(11, 13)));
-        }
-    }
-
-
-    public double calcDistance(double latitude, double longitude) {
-        final int R = 6371; // Radius of the earth
-
-        double latDistance = Math.toRadians(latitude - this.latitude);
-        double lonDistance = Math.toRadians(longitude - this.longitude);
-        double a = Math.sin(latDistance / 2) * Math.sin(latDistance / 2)
-                + Math.cos(Math.toRadians(this.latitude)) * Math.cos(Math.toRadians(latitude))
-                * Math.sin(lonDistance / 2) * Math.sin(lonDistance / 2);
-        double c = 2 * Math.atan2(Math.sqrt(a), Math.sqrt(1 - a));
-        double distance = R * c * 1000; // convert to meters
-        distance = Math.pow(distance, 2);
-        return Math.sqrt(distance);
-    }
-
-
-    public double getLatitude() {
-        return this.latitude;
-    }
-
-    public double getLongitude() {
-        return this.longitude;
-    }
-
-    public boolean checkFix() {
-        return this.fix;
-    }
-
-    public int getSatCount() {
-        return this.satCount;
-    }
-}

app/src/main/java/hendrikschutter/com/externgnss/SerialUSB.java

@@ -1,171 +0,0 @@
-package hendrikschutter.com.externgnss;
-
-import android.app.PendingIntent;
-import android.content.BroadcastReceiver;
-import android.content.Context;
-import android.content.Intent;
-import android.hardware.usb.UsbDevice;
-import android.hardware.usb.UsbDeviceConnection;
-import android.hardware.usb.UsbManager;
-import android.util.Log;
-
-import com.hoho.android.usbserial.driver.UsbSerialDriver;
-import com.hoho.android.usbserial.driver.UsbSerialPort;
-import com.hoho.android.usbserial.driver.UsbSerialProber;
-import com.hoho.android.usbserial.util.SerialInputOutputManager;
-
-import java.io.IOException;
-import java.util.concurrent.BlockingQueue;
-
-public class SerialUSB implements SerialInputOutputManager.Listener{
-    private MainActivity mainActivity = null;
-    private enum UsbPermission { Unknown, Requested, Granted, Denied }
-    private static final String INTENT_ACTION_GRANT_USB = BuildConfig.APPLICATION_ID + ".GRANT_USB";
-    private int deviceId, portNum, baudRate;
-    private BroadcastReceiver broadcastReceiver = null;
-    private SerialInputOutputManager usbIoManager;
-    private UsbSerialPort usbSerialPort;
-    private UsbPermission usbPermission = UsbPermission.Unknown;
-    private BlockingQueue<Byte> dataBytesQueue = null;
-    private boolean connected = false;
-    private int deviceVendorId;
-    private int productID;
-
-    public SerialUSB(MainActivity mainActivity, BlockingQueue<Byte> dataBytesQueue){
-        this.mainActivity = mainActivity;
-        this.dataBytesQueue = dataBytesQueue;
-    }
-
-    public boolean isConnected(){
-        return connected;
-    }
-
-    public int getDeviceId(){
-        return this.deviceId;
-    }
-
-    public int getBaudRate(){
-        return this.baudRate;
-    }
-
-    public int getUsbDeviceVendorId(){
-        return this.deviceVendorId;
-    }
-
-    public boolean findSerialDevice(){
-        // Find all available drivers from attached devices.
-        UsbManager usbManager = (UsbManager) this.mainActivity.getSystemService(Context.USB_SERVICE);
-        UsbSerialProber usbDefaultProber = UsbSerialProber.getDefaultProber();
-        boolean deviceFound = false;
-
-        //check of at least one device is present
-        if (usbManager.getDeviceList().values().size() > 0){
-            //get fist device
-            UsbDevice device = (UsbDevice) usbManager.getDeviceList().values().toArray()[0];
-            UsbSerialDriver driver = usbDefaultProber.probeDevice(device);
-            if(driver == null) {
-                Log.e("SerialUSB", "driver is null");
-            }
-            if(driver != null) {
-                Log.i("SerialUSB", "ExternGNSS: device/driver found!");
-                this.deviceId = device.getDeviceId();
-                this.deviceVendorId = device.getVendorId();
-                deviceFound = true;
-            }
-        } else
-        {
-            Log.e("SerialUSB", "no serial device connected");
-            deviceFound = false;
-        }
-        return deviceFound;
-    }
-
-    public void connect(int baudRate, int portNum) {
-        this.baudRate = baudRate;
-        this.portNum = portNum;
-        Log.i("connect", "starting to connect ...");
-        UsbDevice device = null;
-        UsbManager usbManager = (UsbManager) this.mainActivity.getSystemService(Context.USB_SERVICE);
-        for(UsbDevice v : usbManager.getDeviceList().values())
-            if(v.getDeviceId() == deviceId)
-                device = v;
-        if(device == null) {
-            Log.i("connect", "connection failed: device not found");
-            return;
-        }
-        UsbSerialDriver driver = UsbSerialProber.getDefaultProber().probeDevice(device);
-        if(driver == null) {
-            Log.i("connect", "connection failed: no driver for device");
-            return;
-        }
-        if(driver.getPorts().size() < portNum) {
-            Log.i("connect", "connection failed: not enough ports at device");
-            return;
-        }
-        usbSerialPort = driver.getPorts().get(portNum);
-        UsbDeviceConnection usbConnection = null;
-
-        try {
-             usbConnection = usbManager.openDevice(driver.getDevice());
-        } catch (Exception e){
-            usbPermission = UsbPermission.Requested;
-            PendingIntent usbPermissionIntent = PendingIntent.getBroadcast(this.mainActivity, 0, new Intent(INTENT_ACTION_GRANT_USB), 0);
-            usbManager.requestPermission(driver.getDevice(), usbPermissionIntent);
-        }
-
-        usbConnection = usbManager.openDevice(driver.getDevice());
-        if(usbConnection == null && usbPermission == UsbPermission.Unknown && !usbManager.hasPermission(driver.getDevice())) {
-            usbPermission = UsbPermission.Requested;
-            PendingIntent usbPermissionIntent = PendingIntent.getBroadcast(this.mainActivity, 0, new Intent(INTENT_ACTION_GRANT_USB), 0);
-            usbManager.requestPermission(driver.getDevice(), usbPermissionIntent);
-            return;
-        }
-
-        if(usbConnection == null) {
-            if (!usbManager.hasPermission(driver.getDevice()))
-                Log.i("connect", "connection failed: permission denied");
-            else
-                Log.i("connect", "connection failed: open failed");
-            return;
-        }
-        try {
-            usbSerialPort.open(usbConnection);
-            usbSerialPort.setParameters(baudRate, 8, 1, UsbSerialPort.PARITY_NONE);
-                usbIoManager = new SerialInputOutputManager(usbSerialPort, this);
-                usbIoManager.start();
-            Log.i("connect", "connected");
-            connected = true;
-        } catch (Exception e) {
-            Log.i("connect", "connection failed: " + e.getMessage());
-            disconnect();
-        }
-    }
-
-    public void disconnect() {
-        connected = false;
-        if(usbIoManager != null) {
-            usbIoManager.setListener(null);
-            usbIoManager.stop();
-        }
-        usbIoManager = null;
-        try {
-            usbSerialPort.close();
-        } catch (IOException ignored) {}
-        usbSerialPort = null;
-    }
-
-    @Override
-    public void onNewData(byte[] data) {
-        //Log.i("connect", "received data: " + data.length);
-        //Log.i("connect", new String(data, StandardCharsets.US_ASCII) );
-        for (byte rawByte : data) {
-            this.dataBytesQueue.add(rawByte);
-        }
-    }
-
-    @Override
-    public void onRunError(Exception e) {
-        Log.e("SerialUSB", "runtime error: " + e.getMessage());
-        this.disconnect();
-    }
-}

app/src/main/res/layout/activity_main.xml

@@ -33,7 +33,7 @@
         android:layout_width="70dp"
         android:layout_height="wrap_content"
         android:layout_marginStart="16dp"
-        android:layout_marginBottom="8dp"
+        android:layout_marginLeft="16dp"
         android:text="Altitude:"
         android:textSize="18sp"
         app:layout_constraintBottom_toBottomOf="@+id/interngnssAltitudeNumber"
@@ -47,7 +47,7 @@
         android:layout_marginLeft="16dp"
         android:layout_marginTop="8dp"
         android:clickable="false"
-        android:text="Intern GNSS receiver"
+        android:text="Intern GNSS Receiver"
         android:textAppearance="@style/TextAppearance.AppCompat.Large"
         android:textStyle="bold"
         app:layout_constraintStart_toStartOf="parent"
@@ -80,6 +80,7 @@
         android:layout_width="150dp"
         android:layout_height="wrap_content"
         android:layout_marginStart="128dp"
+        android:layout_marginLeft="128dp"
         android:clickable="false"
         android:cursorVisible="false"
         android:ems="16"
@@ -88,14 +89,14 @@
         android:inputType="numberDecimal"
         android:textSize="16sp"
         app:layout_constraintStart_toStartOf="parent"
-        app:layout_constraintTop_toBottomOf="@+id/interngnssNameTextView"
+        app:layout_constraintTop_toBottomOf="@+id/interngnssNameTextView" />
-        tools:ignore="SpeakableTextPresentCheck,TouchTargetSizeCheck" />
 
     <EditText
         android:id="@+id/interngnssLongNumber"
         android:layout_width="150dp"
         android:layout_height="wrap_content"
         android:layout_marginStart="128dp"
+        android:layout_marginLeft="128dp"
         android:clickable="false"
         android:cursorVisible="false"
         android:focusable="false"
@@ -103,14 +104,14 @@
         android:inputType="numberDecimal"
         android:textSize="16sp"
         app:layout_constraintStart_toStartOf="parent"
-        app:layout_constraintTop_toBottomOf="@+id/interngnssLatNumber"
+        app:layout_constraintTop_toBottomOf="@+id/interngnssLatNumber" />
-        tools:ignore="SpeakableTextPresentCheck,TouchTargetSizeCheck" />
 
     <EditText
         android:id="@+id/interngnssAltitudeNumber"
         android:layout_width="150dp"
         android:layout_height="wrap_content"
         android:layout_marginStart="128dp"
+        android:layout_marginLeft="128dp"
         android:clickable="false"
         android:cursorVisible="false"
         android:focusable="false"
@@ -118,14 +119,14 @@
         android:inputType="numberDecimal"
         android:textSize="16sp"
         app:layout_constraintStart_toStartOf="parent"
-        app:layout_constraintTop_toBottomOf="@+id/interngnssLongNumber"
+        app:layout_constraintTop_toBottomOf="@+id/interngnssLongNumber" />
-        tools:ignore="TouchTargetSizeCheck,SpeakableTextPresentCheck" />
 
     <EditText
         android:id="@+id/interngnssAccuracyNumber"
         android:layout_width="150dp"
         android:layout_height="wrap_content"
         android:layout_marginStart="128dp"
+        android:layout_marginLeft="128dp"
         android:clickable="false"
         android:cursorVisible="false"
         android:focusable="false"
@@ -133,14 +134,14 @@
         android:inputType="numberDecimal"
         android:textSize="16sp"
         app:layout_constraintStart_toStartOf="parent"
-        app:layout_constraintTop_toBottomOf="@+id/interngnssAltitudeNumber"
+        app:layout_constraintTop_toBottomOf="@+id/interngnssAltitudeNumber" />
-        tools:ignore="SpeakableTextPresentCheck,TouchTargetSizeCheck" />
 
     <EditText
         android:id="@+id/interngnssSatCountNumber"
         android:layout_width="150dp"
         android:layout_height="wrap_content"
         android:layout_marginStart="128dp"
+        android:layout_marginLeft="128dp"
         android:clickable="false"
         android:cursorVisible="false"
         android:focusable="false"
@@ -148,152 +149,15 @@
         android:inputType="number"
         android:textSize="16sp"
         app:layout_constraintStart_toStartOf="parent"
-        app:layout_constraintTop_toBottomOf="@+id/interngnssAccuracyNumber"
+        app:layout_constraintTop_toBottomOf="@+id/interngnssAccuracyNumber" />
-        tools:ignore="TouchTargetSizeCheck,SpeakableTextPresentCheck" />
 
     <TextView
-        android:id="@+id/externgnssNameTextView"
+        android:id="@+id/externGNSSTextView"
-        android:layout_width="wrap_content"
+        android:layout_width="360dp"
-        android:layout_height="wrap_content"
+        android:layout_height="347dp"
-        android:layout_marginStart="8dp"
+        android:layout_marginStart="16dp"
-        android:layout_marginTop="272dp"
+        android:layout_marginTop="300dp"
-        android:clickable="false"
-        android:text="Extern GNSS receiver"
-        android:textAppearance="@style/TextAppearance.AppCompat.Large"
-        android:textStyle="bold"
         app:layout_constraintStart_toStartOf="parent"
         app:layout_constraintTop_toTopOf="parent" />
 
-    <TextView
-        android:id="@+id/externgnssLongTextView"
-        android:layout_width="70dp"
-        android:layout_height="32dp"
-        android:layout_marginStart="16dp"
-        android:text="Long:"
-        android:textSize="18sp"
-        app:layout_constraintBottom_toBottomOf="@+id/externgnssLongNumber"
-        app:layout_constraintStart_toStartOf="parent" />
-
-    <TextView
-        android:id="@+id/externgnssLatTextView"
-        android:layout_width="70dp"
-        android:layout_height="32dp"
-        android:layout_marginStart="16dp"
-        android:text="Lat:"
-        android:textSize="18sp"
-        app:layout_constraintBottom_toBottomOf="@+id/externgnssLatNumber"
-        app:layout_constraintStart_toStartOf="parent" />
-
-    <TextView
-        android:id="@+id/externgnssSatCountTextView"
-        android:layout_width="wrap_content"
-        android:layout_height="32dp"
-        android:layout_marginStart="16dp"
-        android:text="Satellites:"
-        android:textSize="18sp"
-        app:layout_constraintBottom_toBottomOf="@+id/externgnssSatCountNumber"
-        app:layout_constraintStart_toStartOf="parent" />
-
-    <EditText
-        android:id="@+id/externgnssLatNumber"
-        android:layout_width="150dp"
-        android:layout_height="wrap_content"
-        android:layout_marginStart="128dp"
-        android:clickable="false"
-        android:cursorVisible="false"
-        android:ems="16"
-        android:focusable="false"
-        android:focusableInTouchMode="false"
-        android:inputType="numberDecimal"
-        android:textSize="16sp"
-        app:layout_constraintStart_toStartOf="parent"
-        app:layout_constraintTop_toBottomOf="@+id/externgnssNameTextView"
-        tools:ignore="SpeakableTextPresentCheck,TouchTargetSizeCheck"
-        tools:text="no signal" />
-
-    <EditText
-        android:id="@+id/externgnssLongNumber"
-        android:layout_width="150dp"
-        android:layout_height="wrap_content"
-        android:layout_marginStart="128dp"
-        android:clickable="false"
-        android:cursorVisible="false"
-        android:focusable="false"
-        android:focusableInTouchMode="false"
-        android:inputType="numberDecimal"
-        android:textSize="16sp"
-        app:layout_constraintStart_toStartOf="parent"
-        app:layout_constraintTop_toBottomOf="@+id/externgnssLatNumber"
-        tools:ignore="SpeakableTextPresentCheck,TouchTargetSizeCheck"
-        tools:text="no signal" />
-
-    <EditText
-        android:id="@+id/externgnssSatCountNumber"
-        android:layout_width="150dp"
-        android:layout_height="wrap_content"
-        android:layout_marginStart="128dp"
-        android:clickable="false"
-        android:cursorVisible="false"
-        android:focusable="false"
-        android:focusableInTouchMode="false"
-        android:inputType="number"
-        android:textSize="16sp"
-        app:layout_constraintStart_toStartOf="parent"
-        app:layout_constraintTop_toBottomOf="@+id/externgnssLongNumber"
-        tools:ignore="SpeakableTextPresentCheck,TouchTargetSizeCheck"
-        tools:text="no signal" />
-
-    <TextView
-        android:id="@+id/diffGNSSNameTextView"
-        android:layout_width="wrap_content"
-        android:layout_height="wrap_content"
-        android:layout_marginStart="8dp"
-        android:layout_marginTop="450dp"
-        android:clickable="false"
-        android:text="GNSS difference"
-        android:textAppearance="@style/TextAppearance.AppCompat.Large"
-        android:textStyle="bold"
-        app:layout_constraintStart_toStartOf="parent"
-        app:layout_constraintTop_toTopOf="parent" />
-
-    <TextView
-        android:id="@+id/diffGNSSDistanceTextView"
-        android:layout_width="wrap_content"
-        android:layout_height="32dp"
-        android:layout_marginStart="20dp"
-        android:text="Distance:"
-        android:textSize="18sp"
-        app:layout_constraintBottom_toBottomOf="@+id/diffGNSSDistanceNumber"
-        app:layout_constraintStart_toStartOf="parent" />
-
-    <EditText
-        android:id="@+id/diffGNSSDistanceNumber"
-        android:layout_width="150dp"
-        android:layout_height="wrap_content"
-        android:layout_marginStart="120dp"
-        android:layout_marginTop="184dp"
-        android:clickable="false"
-        android:cursorVisible="false"
-        android:ems="16"
-        android:focusable="false"
-        android:focusableInTouchMode="false"
-        android:inputType="numberDecimal"
-        android:textSize="16sp"
-        app:layout_constraintStart_toStartOf="parent"
-        app:layout_constraintTop_toBottomOf="@+id/externgnssNameTextView"
-        tools:ignore="SpeakableTextPresentCheck,TouchTargetSizeCheck"
-        tools:text="no signal" />
-
-    <com.google.android.material.floatingactionbutton.FloatingActionButton
-        android:id="@+id/floatingActionButtonExternGnssInfo"
-        android:layout_width="wrap_content"
-        android:layout_height="wrap_content"
-        android:layout_marginEnd="23dp"
-        android:layout_marginBottom="45dp"
-        android:clickable="true"
-        app:layout_constraintBottom_toBottomOf="parent"
-        app:layout_constraintEnd_toEndOf="parent"
-        app:srcCompat="@android:drawable/ic_dialog_info"
-        tools:ignore="SpeakableTextPresentCheck" />
-
 </androidx.constraintlayout.widget.ConstraintLayout>

app/src/main/res/xml/usb_serial_devices.xml

@@ -1,4 +0,0 @@
-<?xml version="1.0" encoding="utf-8"?>
-<resources>
-    <usb-device vendor-id="1027" product-id="24577"/> <!-- 0x6001: FT232R -->
-</resources>

build.gradle

@@ -6,7 +6,8 @@ buildscript {
         mavenCentral()
     }
     dependencies {
-        classpath 'com.android.tools.build:gradle:7.1.3'
+        classpath 'com.android.tools.build:gradle:7.1.2'
+        
         // NOTE: Do not place your application dependencies here; they belong
         // in the individual module build.gradle files
     }