UI for Sharing Blogs

This commit refactors the code for sharing forums,
so it can be used for sharing blogs as well.

It does not yet include code for responding to blog invitations.

briar-android/src/org/briarproject/android/sharing/ShareActivity.java

@@ -0,0 +1,117 @@
+package org.briarproject.android.sharing;
+
+import android.content.Intent;
+import android.os.Bundle;
+import android.view.View;
+
+import org.briarproject.R;
+import org.briarproject.android.ActivityComponent;
+import org.briarproject.android.BriarActivity;
+import org.briarproject.android.fragment.BaseFragment;
+import org.briarproject.api.contact.ContactId;
+import org.briarproject.api.sync.GroupId;
+
+import java.util.ArrayList;
+import java.util.Collection;
+import java.util.List;
+
+public class ShareActivity extends BriarActivity implements
+		BaseFragment.BaseFragmentListener {
+
+	public final static String SHAREABLE = "shareable";
+	public final static int FORUM = 1;
+	public final static int BLOG = 2;
+
+	final static String CONTACTS = "contacts";
+
+	private int shareable;
+
+	@Override
+	public void onCreate(Bundle savedInstanceState) {
+		super.onCreate(savedInstanceState);
+
+		setContentView(R.layout.activity_share_forum);
+
+		Intent i = getIntent();
+		byte[] b = i.getByteArrayExtra(GROUP_ID);
+		if (b == null) throw new IllegalStateException("No GroupId");
+		GroupId groupId = new GroupId(b);
+
+		shareable = i.getIntExtra(SHAREABLE, 0);
+		if (shareable == 0) throw new IllegalStateException("No Shareable");
+
+		if (savedInstanceState == null) {
+			ContactSelectorFragment contactSelectorFragment =
+					ContactSelectorFragment.newInstance(shareable, groupId);
+			getSupportFragmentManager().beginTransaction()
+					.add(R.id.shareContainer, contactSelectorFragment)
+					.commit();
+		}
+	}
+
+	@Override
+	public void injectActivity(ActivityComponent component) {
+		component.inject(this);
+	}
+
+	void showMessageScreen(GroupId groupId,
+			Collection<ContactId> contacts) {
+
+		ShareMessageFragment messageFragment =
+				ShareMessageFragment.newInstance(shareable, groupId, contacts);
+
+		getSupportFragmentManager().beginTransaction()
+				.setCustomAnimations(android.R.anim.fade_in,
+						android.R.anim.fade_out,
+						android.R.anim.slide_in_left,
+						android.R.anim.slide_out_right)
+				.replace(R.id.shareContainer, messageFragment,
+						ContactSelectorFragment.TAG)
+				.addToBackStack(null)
+				.commit();
+	}
+
+	static ArrayList<Integer> getContactsFromIds(
+			Collection<ContactId> contacts) {
+
+		// transform ContactIds to Integers so they can be added to a bundle
+		ArrayList<Integer> intContacts = new ArrayList<>(contacts.size());
+		for (ContactId contactId : contacts) {
+			intContacts.add(contactId.getInt());
+		}
+		return intContacts;
+	}
+
+	void sharingSuccessful(View v) {
+		setResult(RESULT_OK);
+		hideSoftKeyboard(v);
+		supportFinishAfterTransition();
+	}
+
+	static Collection<ContactId> getContactsFromIntegers(
+			ArrayList<Integer> intContacts) {
+
+		// turn contact integers from a bundle back to ContactIds
+		List<ContactId> contacts = new ArrayList<>(intContacts.size());
+		for (Integer c : intContacts) {
+			contacts.add(new ContactId(c));
+		}
+		return contacts;
+	}
+
+	@Override
+	public void showLoadingScreen(boolean isBlocking, int stringId) {
+		// this is handled by the recycler view in ContactSelectorFragment
+	}
+
+	@Override
+	public void hideLoadingScreen() {
+		// this is handled by the recycler view in ContactSelectorFragment
+	}
+
+	@Override
+	public void onFragmentCreated(String tag) {
+
+	}
+
+}