add CardManager thread

Performance tests

app/src/main/java/im/status/applet_installer_test/appletinstaller/APDUResponse.java

@@ -39,7 +39,7 @@ public class APDUResponse {
 
     public APDUResponse checkOK() throws APDUException {
         if (!isOK()) {
-            throw new APDUException("Unexpected error SW");
+            throw new APDUException(this.getSw(),  "Unexpected error SW");
         }
 
         return this;

app/src/main/java/im/status/applet_installer_test/appletinstaller/MainActivity.java

@@ -29,6 +29,7 @@ public class MainActivity extends AppCompatActivity implements NfcAdapter.Reader
     private Button buttonPerfTest;
     private Tag tag;
     private boolean installationAttempted;
+    private TagManager tagManager;
 
     @Override
     protected void onCreate(Bundle savedInstanceState) {
@@ -36,6 +37,8 @@ public class MainActivity extends AppCompatActivity implements NfcAdapter.Reader
         setContentView(R.layout.activity_main);
         nfcAdapter = NfcAdapter.getDefaultAdapter(this);
         Logger.setListener(this);
+        this.tagManager = new TagManager(nfcAdapter);
+        this.tagManager.start();
         textView = (TextView) findViewById(R.id.textView);
         textView.setMovementMethod(new ScrollingMovementMethod());
         buttonInstall = (Button) findViewById(R.id.buttonInstall);
@@ -102,7 +105,7 @@ public class MainActivity extends AppCompatActivity implements NfcAdapter.Reader
     public void onResume() {
         super.onResume();
         if (nfcAdapter != null) {
-            nfcAdapter.enableReaderMode(this, this,
+            nfcAdapter.enableReaderMode(this, this.tagManager,
                     NfcAdapter.FLAG_READER_NFC_A |
                             NfcAdapter.FLAG_READER_SKIP_NDEF_CHECK,
                     null);
@@ -119,6 +122,7 @@ public class MainActivity extends AppCompatActivity implements NfcAdapter.Reader
 
     @Override
     public void onTagDiscovered(Tag tag) {
+        Logger.log("tag found");
         try {
             start(tag);
         } catch (final IOException e) {
@@ -133,7 +137,6 @@ public class MainActivity extends AppCompatActivity implements NfcAdapter.Reader
 
     private void start(Tag tag) throws IOException {
         this.tag = tag;
-        Logger.log("--------------------------\ntag found");
         this.enableButtons();
     }
 

app/src/main/java/im/status/applet_installer_test/appletinstaller/TagManager.java

@@ -0,0 +1,54 @@
+package im.status.applet_installer_test.appletinstaller;
+
+import android.nfc.NfcAdapter;
+import android.nfc.Tag;
+import android.nfc.tech.IsoDep;
+import android.util.Log;
+
+import java.io.IOException;
+
+public class TagManager extends Thread implements NfcAdapter.ReaderCallback {
+    NfcAdapter nfcAdapter;
+    IsoDep isoDep;
+
+    public TagManager(NfcAdapter nfcAdapter) {
+        this.nfcAdapter = nfcAdapter;
+    }
+
+    public boolean isConnected() {
+        return this.isoDep != null && this.isoDep.isConnected();
+    }
+
+    public void run() {
+        boolean connected = this.isConnected();
+
+        while(true) {
+            boolean newConnected = this.isConnected();
+            if (newConnected != connected) {
+                connected = newConnected;
+                Logger.log("tag " + (connected ? "connected" : "disconnected"));
+
+                if (!newConnected) {
+                    this.isoDep = null;
+                }
+            }
+
+            try {
+                this.sleep(50);
+            } catch (InterruptedException e) {
+                Logger.log("error in TagManager thread: " + e.getMessage());
+                this.interrupt();
+            }
+        }
+    }
+
+    @Override
+    public void onTagDiscovered(Tag tag) {
+        this.isoDep = IsoDep.get(tag);
+        try {
+            this.isoDep.connect();
+        } catch (IOException e) {
+            Logger.log("error connecting to tag");
+        }
+    }
+}

app/src/main/java/im/status/applet_installer_test/appletinstaller/apducommands/SecureChannelSession.java

@@ -299,7 +299,7 @@ public class SecureChannelSession {
    * @return the raw card response
    * @throws IOException communication error
    */
-  public void unpairOthers(CardChannel apduChannel) throws IOException {
+  public void unpairOthers(CardChannel apduChannel) throws IOException, APDUException {
     for (int i = 0; i < PAIRING_MAX_CLIENT_COUNT; i++) {
       if (i != pairingIndex) {
         APDUCommand openSecureChannel = protectedCommand(0x80, INS_UNPAIR, i, 0, new byte[0]);

app/src/main/java/im/status/applet_installer_test/appletinstaller/apducommands/WalletAppletCommandSet.java

@@ -1,6 +1,7 @@
 package im.status.applet_installer_test.appletinstaller.apducommands;
 
 import im.status.applet_installer_test.appletinstaller.APDUCommand;
+import im.status.applet_installer_test.appletinstaller.APDUException;
 import im.status.applet_installer_test.appletinstaller.APDUResponse;
 import im.status.applet_installer_test.appletinstaller.CardChannel;
 import org.spongycastle.jce.interfaces.ECPrivateKey;
@@ -143,7 +144,7 @@ public class WalletAppletCommandSet {
   /**
    * Unpair all other clients.
    */
-  public void unpairOthers() throws IOException {
+  public void unpairOthers() throws IOException, APDUException {
     secureChannel.unpairOthers(apduChannel);
   }
 

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

@@ -15,7 +15,8 @@
         android:text="\n"
         android:scrollbars="vertical"
         android:padding="10dp"
-        android:gravity="bottom" />
+        android:gravity="bottom"
+        android:textIsSelectable="true" />
 
 
     <Button