add APDUResponse class and test

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

@@ -0,0 +1,53 @@
+package im.status.applet_installer_test.appletinstaller;
+
+public class APDUResponse {
+    public static int SW_OK = 0x9000;
+    public static int SW_SECURITY_CONDITION_NOT_SATISFIED = 0x6982;
+    public static int SW_AUTHENTICATION_METHOD_BLOCKED = 0x6983;
+
+    private byte[] apdu;
+    private byte[] data;
+    private int sw;
+    private int sw1;
+    private int sw2;
+
+    public APDUResponse(byte[] apdu)  {
+        if (apdu.length < 2) {
+            throw new IllegalArgumentException("APDU response must be at least 2 bytes");
+
+        }
+        this.apdu = apdu;
+        this.parse();
+    }
+
+    private void parse() {
+        int length = this.apdu.length;
+
+        this.sw1 = this.apdu[length - 2] & 0xff;
+        this.sw2 = this.apdu[length - 1] & 0xff;
+        this.sw = (this.sw1 << 8) | this.sw2;
+
+        this.data = new byte[length - 2];
+        System.arraycopy(this.apdu, 0, this.data, 0, length - 2);
+    }
+
+    public boolean isOK() {
+        return this.sw == SW_OK;
+    }
+
+    public byte[] getData() {
+        return this.data;
+    }
+
+    public int getSw() {
+        return this.sw;
+    }
+
+    public int getSw1() {
+        return this.sw1;
+    }
+
+    public int getSw2() {
+        return this.sw2;
+    }
+}

app/src/test/java/im/status/applet_installer_test/appletinstaller/APDUResponseTest.java

@@ -0,0 +1,23 @@
+package im.status.applet_installer_test.appletinstaller;
+
+import org.junit.Test;
+
+import java.io.IOException;
+
+import static org.junit.Assert.*;
+
+public class APDUResponseTest {
+    @Test
+    public void parsing() {
+        byte[] apdu = HexUtils.hexStringToByteArray("000002650183039536622002003b5e508f751c0af3016e3fbc23d3a69000");
+        APDUResponse resp = new APDUResponse(apdu);
+
+        assertEquals(0x9000, resp.getSw());
+        assertEquals(0x90, resp.getSw1());
+        assertEquals(0x00, resp.getSw2());
+
+        String expected = "000002650183039536622002003B5E508F751C0AF3016E3FBC23D3A6";
+        assertEquals(expected, HexUtils.byteArrayToHexString(resp.getData()));
+        assertTrue(resp.isOK());
+    }
+}