WIP: Refactored NFC fragment to view.

F-Droid/res/layout/swap_nfc.xml

@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="utf-8"?>
 
-<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
+<org.fdroid.fdroid.views.swap.views.NfcView xmlns:android="http://schemas.android.com/apk/res/android"
     android:orientation="vertical"
     android:layout_width="match_parent"
     android:layout_height="match_parent"
@@ -30,4 +30,4 @@
             android:layout_below="@+id/text_description"
             android:layout_centerHorizontal="true"/>
 
-</RelativeLayout>
+</org.fdroid.fdroid.views.swap.views.NfcView>

F-Droid/src/org/fdroid/fdroid/views/swap/SwapWorkflowActivity.java

@@ -16,11 +16,15 @@ import android.view.ViewGroup;
 import android.widget.Toast;
 
 import org.fdroid.fdroid.FDroidApp;
+import org.fdroid.fdroid.NfcHelper;
+import org.fdroid.fdroid.Preferences;
 import org.fdroid.fdroid.R;
 import org.fdroid.fdroid.Utils;
 import org.fdroid.fdroid.localrepo.LocalRepoManager;
 
 import java.util.Set;
+import java.util.Timer;
+import java.util.TimerTask;
 
 public class SwapWorkflowActivity extends FragmentActivity {
 
@@ -39,6 +43,7 @@ public class SwapWorkflowActivity extends FragmentActivity {
     private InnerView currentView;
     private boolean hasPreparedLocalRepo = false;
     private UpdateAsyncTask updateSwappableAppsTask = null;
+    private Timer shutdownLocalRepoTimer;
 
     @Override
     protected void onCreate(Bundle savedInstanceState) {
@@ -108,10 +113,60 @@ public class SwapWorkflowActivity extends FragmentActivity {
     }
 
     public void onJoinWifiComplete() {
-        /*ensureLocalRepoRunning();
+        ensureLocalRepoRunning();
         if (!attemptToShowNfc()) {
-            showWifiQr();
-        }*/
+            // showWifiQr();
+        }
+    }
+
+    private boolean attemptToShowNfc() {
+        // TODO: What if NFC is disabled? Hook up with NfcNotEnabledActivity? Or maybe only if they
+        // click a relevant button?
+
+        // Even if they opted to skip the message which says "Touch devices to swap",
+        // we still want to actually enable the feature, so that they could touch
+        // during the wifi qr code being shown too.
+        boolean nfcMessageReady = NfcHelper.setPushMessage(this, Utils.getSharingUri(FDroidApp.repo));
+
+        if (Preferences.get().showNfcDuringSwap() && nfcMessageReady) {
+            inflateInnerView(R.layout.swap_nfc);
+            return true;
+        }
+        return false;
+    }
+
+    private void ensureLocalRepoRunning() {
+        if (!FDroidApp.isLocalRepoServiceRunning()) {
+            FDroidApp.startLocalRepoService(this);
+            initLocalRepoTimer(900000); // 15 mins
+        }
+    }
+
+    private void initLocalRepoTimer(long timeoutMilliseconds) {
+
+        // reset the timer if viewing this Activity again
+        if (shutdownLocalRepoTimer != null)
+            shutdownLocalRepoTimer.cancel();
+
+        // automatically turn off after 15 minutes
+        shutdownLocalRepoTimer = new Timer();
+        shutdownLocalRepoTimer.schedule(new TimerTask() {
+            @Override
+            public void run() {
+                FDroidApp.stopLocalRepoService(SwapWorkflowActivity.this);
+            }
+        }, timeoutMilliseconds);
+
+    }
+
+    public void stopSwapping() {
+        if (FDroidApp.isLocalRepoServiceRunning()) {
+            if (shutdownLocalRepoTimer != null) {
+                shutdownLocalRepoTimer.cancel();
+            }
+            FDroidApp.stopLocalRepoService(SwapWorkflowActivity.this);
+        }
+        finish();
     }
 
     class UpdateAsyncTask extends AsyncTask<Void, String, Void> {

F-Droid/src/org/fdroid/fdroid/views/swap/views/NfcView.java

@@ -0,0 +1,65 @@
+package org.fdroid.fdroid.views.swap.views;
+
+import android.annotation.TargetApi;
+import android.content.Context;
+import android.os.Build;
+import android.support.annotation.NonNull;
+import android.support.v4.view.MenuItemCompat;
+import android.util.AttributeSet;
+import android.view.Menu;
+import android.view.MenuInflater;
+import android.view.MenuItem;
+import android.widget.CheckBox;
+import android.widget.CompoundButton;
+import android.widget.RelativeLayout;
+
+import org.fdroid.fdroid.Preferences;
+import org.fdroid.fdroid.R;
+import org.fdroid.fdroid.views.swap.SwapWorkflowActivity;
+
+public class NfcView extends RelativeLayout implements SwapWorkflowActivity.InnerView {
+
+    public NfcView(Context context) {
+        super(context);
+    }
+
+    public NfcView(Context context, AttributeSet attrs) {
+        super(context, attrs);
+    }
+
+    public NfcView(Context context, AttributeSet attrs, int defStyleAttr) {
+        super(context, attrs, defStyleAttr);
+    }
+
+    @TargetApi(Build.VERSION_CODES.LOLLIPOP)
+    public NfcView(Context context, AttributeSet attrs, int defStyleAttr, int defStyleRes) {
+        super(context, attrs, defStyleAttr, defStyleRes);
+    }
+
+    @Override
+    protected void onFinishInflate() {
+        super.onFinishInflate();
+        CheckBox dontShowAgain = (CheckBox)findViewById(R.id.checkbox_dont_show);
+        dontShowAgain.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {
+            @Override
+            public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
+                Preferences.get().setShowNfcDuringSwap(!isChecked);
+            }
+        });
+    }
+
+    @Override
+    public boolean buildMenu(Menu menu, @NonNull MenuInflater inflater) {
+        inflater.inflate(R.menu.swap_skip, menu);
+        MenuItem next = menu.findItem(R.id.action_next);
+        MenuItemCompat.setShowAsAction(next, MenuItemCompat.SHOW_AS_ACTION_ALWAYS | MenuItemCompat.SHOW_AS_ACTION_WITH_TEXT);
+        next.setOnMenuItemClickListener(new MenuItem.OnMenuItemClickListener() {
+            @Override
+            public boolean onMenuItemClick(MenuItem item) {
+                // TODO: Show QR Code.
+                return true;
+            }
+        });
+        return true;
+    }
+}