add initial example UI

.idea/misc.xml

@@ -1,5 +1,30 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <project version="4">
+  <component name="NullableNotNullManager">
+    <option name="myDefaultNullable" value="android.support.annotation.Nullable" />
+    <option name="myDefaultNotNull" value="android.support.annotation.NonNull" />
+    <option name="myNullables">
+      <value>
+        <list size="5">
+          <item index="0" class="java.lang.String" itemvalue="org.jetbrains.annotations.Nullable" />
+          <item index="1" class="java.lang.String" itemvalue="javax.annotation.Nullable" />
+          <item index="2" class="java.lang.String" itemvalue="javax.annotation.CheckForNull" />
+          <item index="3" class="java.lang.String" itemvalue="edu.umd.cs.findbugs.annotations.Nullable" />
+          <item index="4" class="java.lang.String" itemvalue="android.support.annotation.Nullable" />
+        </list>
+      </value>
+    </option>
+    <option name="myNotNulls">
+      <value>
+        <list size="4">
+          <item index="0" class="java.lang.String" itemvalue="org.jetbrains.annotations.NotNull" />
+          <item index="1" class="java.lang.String" itemvalue="javax.annotation.Nonnull" />
+          <item index="2" class="java.lang.String" itemvalue="edu.umd.cs.findbugs.annotations.NonNull" />
+          <item index="3" class="java.lang.String" itemvalue="android.support.annotation.NonNull" />
+        </list>
+      </value>
+    </option>
+  </component>
   <component name="ProjectRootManager" version="2" languageLevel="JDK_1_7" default="true" project-jdk-name="1.8" project-jdk-type="JavaSDK">
     <output url="file://$PROJECT_DIR$/build/classes" />
   </component>

app/src/main/AndroidManifest.xml

@@ -2,6 +2,10 @@
 <manifest xmlns:android="http://schemas.android.com/apk/res/android"
     package="im.status.applet_installer_test.appletinstaller">
 
+    <uses-permission android:name="android.permission.NFC" />
+    <uses-feature android:name="android.hardware.nfc.hce"
+        android:required="true" />
+
     <application
         android:allowBackup="true"
         android:icon="@mipmap/ic_launcher"

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

@@ -2,12 +2,114 @@ package im.status.applet_installer_test.appletinstaller;
 
 import android.support.v7.app.AppCompatActivity;
 import android.os.Bundle;
+import android.nfc.NfcAdapter;
+import android.nfc.Tag;
+import android.nfc.tech.IsoDep;
+import android.util.Log;
+import android.view.View;
+import android.widget.Button;
+import android.widget.TextView;
+import java.io.IOException;
+import java.io.ByteArrayOutputStream;
+import java.security.SecureRandom;
 
-public class MainActivity extends AppCompatActivity {
+public class MainActivity extends AppCompatActivity implements NfcAdapter.ReaderCallback {
+
+    private NfcAdapter nfcAdapter;
+    private TextView textView;
+    private Button buttonInstall;
+    private Tag tag;
+    private boolean installationAttempted;
 
     @Override
     protected void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
         setContentView(R.layout.activity_main);
+        nfcAdapter = NfcAdapter.getDefaultAdapter(this);
+        textView = (TextView) findViewById(R.id.textView);
+        buttonInstall = (Button) findViewById(R.id.buttonInstall);
+        buttonInstall.setEnabled(false);
+        buttonInstall.setOnClickListener(new View.OnClickListener() {
+            @Override
+            public void onClick(View view) {
+                disableInstallButton();
+                try {
+                    install();
+                } catch (Exception e) {
+                    Logger.log(e.getMessage());
+                }
+            }
+        });
+    }
+
+    public void install() throws Exception {
+        if (installationAttempted) {
+            throw new Exception("installation already attempted");
+        }
+
+        installationAttempted = true;
+
+        Logger.log("installing");
+        CardManager cm = new CardManager(tag);
+        cm.connect();
+        cm.install();
+    }
+
+    @Override
+    public void onResume() {
+        super.onResume();
+        if (nfcAdapter != null) {
+            nfcAdapter.enableReaderMode(this, this,
+                    NfcAdapter.FLAG_READER_NFC_A |
+                            NfcAdapter.FLAG_READER_SKIP_NDEF_CHECK,
+                    null);
+        }
+    }
+
+    @Override
+    public void onPause() {
+        super.onPause();
+        if (nfcAdapter != null) {
+            nfcAdapter.disableReaderMode(this);
+        }
+    }
+
+    @Override
+    public void onTagDiscovered (Tag tag) {
+        try {
+            start(tag);
+        } catch (final IOException e) {
+            runOnUiThread(new Runnable() {
+                @Override
+                public void run() {
+                    textView.append("\nexception: " + e.getMessage());
+                }
+            });
+        }
+    }
+
+    private void start(Tag tag) throws IOException {
+        this.tag = tag;
+        Logger.log("tag found");
+        this.enableInstallButton();
+    }
+
+    public void enableInstallButton() {
+        runOnUiThread(new Runnable() {
+            @Override
+            public void run() {
+                buttonInstall.setEnabled(true);
+            }
+        });
+    }
+
+    public void disableInstallButton() {
+        runOnUiThread(new Runnable() {
+            @Override
+            public void run() {
+                buttonInstall.setEnabled(false);
+            }
+        });
     }
 }
+

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

@@ -7,12 +7,24 @@
     tools:context=".MainActivity">
 
     <TextView
-        android:layout_width="wrap_content"
+        android:id="@+id/textView"
-        android:layout_height="wrap_content"
+        android:layout_width="368dp"
+        android:layout_height="405dp"
+        android:layout_marginEnd="8dp"
         android:text="Hello World!"
         app:layout_constraintBottom_toBottomOf="parent"
+        app:layout_constraintEnd_toEndOf="parent"
         app:layout_constraintLeft_toLeftOf="parent"
         app:layout_constraintRight_toRightOf="parent"
-        app:layout_constraintTop_toTopOf="parent" />
+        app:layout_constraintTop_toTopOf="parent"
+        app:layout_constraintVertical_bias="0.014" />
+
+    <Button
+        android:id="@+id/buttonInstall"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:text="install"
+        tools:layout_editor_absoluteX="148dp"
+        tools:layout_editor_absoluteY="446dp" />
 
 </android.support.constraint.ConstraintLayout>