Differences

This shows you the differences between two versions of the page.

--- android_study_2 [2020/03/10 02:27] – [Driver for USB to serial Device] jrseti
+++ android_study_2 [2020/03/10 03:06] (current) – [BLE] jrseti
@@ Line 4: / Line 4: @@
 ====NFC====
+  * Configure the NFC:
+<code>
+        private void configureNfc(){
+        mNfcAdapter = NfcAdapter.getDefaultAdapter(this);
+        mPendingIntent = PendingIntent.getActivity(this, 0, new Intent(this,
+                getClass()).addFlags(Intent.FLAG_ACTIVITY_SINGLE_TOP), 0);
+        Log.v(LOG_TAG, "NFC enabled = " + mNfcAdapter.isEnabled());
+        IntentFilter intnfcv = new IntentFilter(
+                NfcAdapter.ACTION_TECH_DISCOVERED);
+        mFilters = new IntentFilter[] {
+                intnfcv};
+        mTechLists = new String[][] { new String[] {
+                NfcV.class.getName() }};
+    }
+</code>
+  * Enable NFC for this app:
+<code>
+NfcAdapter.enableForegroundDispatch(PatchDevicesActivity.this, mPendingIntent, mFilters, mTechLists);
+</code>
+  * When device gets near enough you get an intent:
+<code>
+        protected void onNewIntent(Intent intent) {
+        super.onNewIntent(intent);
+        final String action = intent.getAction();
+        Log.v(LOG_TAG, "onNewIntent:" + action);
+        setIntent(intent);
+        if (mNfcEnabled == true &&
+            NfcAdapter.ACTION_TECH_DISCOVERED.equals(getIntent().getAction())) {
+              Tag tag = getIntent().getParcelableExtra(NfcAdapter.EXTRA_TAG);
+              tranceive() to send and get response
+        }
+</code>
+  * Then disable NFC for this app:
+<code>
+            NfcAdapter nfcAdapter = NfcAdapter.getDefaultAdapter(this);
+            nfcAdapter.disableForegroundDispatch(PatchDevicesActivity.this);
+</code>
 ====BLE====
+<code>
+        final BluetoothManager bluetoothManager =
+                (BluetoothManager)getSystemService(Context.BLUETOOTH_SERVICE);
+        mBluetoothAdapter = bluetoothManager.getAdapter();
+        mLEScanner = mBluetoothAdapter.getBluetoothLeScanner();
+        settings = new ScanSettings.Builder()
+                .setScanMode(ScanSettings.SCAN_MODE_LOW_LATENCY)
+                .build();
+        filters = new ArrayList<ScanFilter>();
+        ScanFilter scanFilter = new ScanFilter.Builder()
+                .setServiceUuid(ParcelUuid.fromString(FILTER_UUID))
+                .build();
+        filters.add(scanFilter);
+        IntentFilter filter = new IntentFilter(BluetoothAdapter.ACTION_STATE_CHANGED);
+        registerReceiver(mBLEStateChangedReceiver, filter);
+</code>
+  * Then start scanning and get the scan callbacks:
+<code>
+        private ScanCallback mScanCallback = new ScanCallback() {
+        @Override
+        public void onScanResult(int callbackType, ScanResult result) {
+</code>
 ====Service====
+  * Start the service from the main Activity. This will bind to the service if it exists. Otherwise it will start the service.
+<code>
+        mServiceIntent = new Intent(this, PatchService.class);
+        bindService(mServiceIntent, mConnection, BIND_AUTO_CREATE);
+        startService(mServiceIntent);
+</code>
+  * In the Service class instance call startForeground() with a notification to display to the user.
+  * This will keep the service active in the foreground and never die.
+  * To start the service when the device is powered on do this in the manifest:
+<code>
+        <receiver android:name=".Autostart">
+            <intent-filter>
+                <action android:name="android.intent.action.BOOT_COMPLETED" />
+            </intent-filter>
+        </receiver>
+</code>
+  * Autostart is a BroadcastReceiver:
+<code>
+public class Autostart extends BroadcastReceiver
+{
+    private static final String LOG_TAG = "PATCH_SERVICE_AUTOSTART";
+    public void onReceive(Context context, Intent arg1)
+    {
+        Intent intent = new Intent(context, PatchService.class);
+        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
+            context.startForegroundService(intent);
+        } else {
+            context.startService(intent);
+        }
+        Log.v(LOG_TAG, "started");
+    }
+}
+</code>
 ====Driver for USB to serial Device====
@@ Line 61: / Line 178: @@
 </code>
+Then create threads
+<code>
+private static class ReadThread implements Runnable {
+  @Override
+        public void run() {
+        }
+}
+parentDevice.readThread = new ReadThread(parentDevice);
+Thread rt = new Thread(parentDevice.readThread);
+rt.setPriority(Thread.MAX_PRIORITY);
+rt.start();
+</code>