Implement UX design for inviting new members to a group

briar-android/src/org/briarproject/android/privategroup/creation/GroupInviteActivity.java

@@ -0,0 +1,50 @@
+package org.briarproject.android.privategroup.creation;
+
+import android.content.Intent;
+import android.os.Bundle;
+
+import org.briarproject.R;
+import org.briarproject.android.ActivityComponent;
+import org.briarproject.android.sharing.BaseMessageFragment.MessageFragmentListener;
+import org.briarproject.android.sharing.ContactSelectorFragment;
+import org.briarproject.api.contact.Contact;
+import org.briarproject.api.db.DatabaseExecutor;
+import org.briarproject.api.db.DbException;
+import org.briarproject.api.sync.GroupId;
+
+public class GroupInviteActivity extends BaseGroupInviteActivity
+		implements MessageFragmentListener {
+
+	@Override
+	public void injectActivity(ActivityComponent component) {
+		component.inject(this);
+	}
+
+	@Override
+	public void onCreate(Bundle bundle) {
+		super.onCreate(bundle);
+
+		// Initialise the group ID,
+		// it will be saved and restored by the superclass
+		Intent i = getIntent();
+		byte[] g = i.getByteArrayExtra(GROUP_ID);
+		if (g == null) throw new IllegalStateException("No GroupId in intent.");
+		groupId = new GroupId(g);
+
+		if (bundle == null) {
+			ContactSelectorFragment fragment =
+					ContactSelectorFragment.newInstance(groupId);
+			getSupportFragmentManager().beginTransaction()
+					.replace(R.id.fragmentContainer, fragment)
+					.commit();
+		}
+	}
+
+	@Override
+	@DatabaseExecutor
+	public boolean isDisabled(GroupId groupId, Contact c) throws DbException {
+		// TODO disable contacts that can not be invited
+		return false;
+	}
+
+}