Adds ability to page between multiple images in a status by swiping from left to right. Closes #66

app/src/main/java/com/keylesspalace/tusky/pager/ImagePagerAdapter.java

@@ -0,0 +1,37 @@
+package com.keylesspalace.tusky.pager;
+
+import android.support.v4.app.Fragment;
+import android.support.v4.app.FragmentManager;
+import android.support.v4.app.FragmentPagerAdapter;
+
+import com.keylesspalace.tusky.fragment.ViewMediaFragment;
+
+import java.util.Locale;
+
+public class ImagePagerAdapter extends FragmentPagerAdapter {
+    private String[] urls;
+
+    public ImagePagerAdapter(FragmentManager fragmentManager, String[] urls) {
+        super(fragmentManager);
+        this.urls = urls;
+    }
+
+    @Override
+    public Fragment getItem(int position) {
+        if (position >= 0 && position < urls.length) {
+            return ViewMediaFragment.newInstance(urls[position]);
+        } else {
+            return null;
+        }
+    }
+
+    @Override
+    public int getCount() {
+        return urls.length;
+    }
+
+    @Override
+    public CharSequence getPageTitle(int position) {
+        return String.format(Locale.getDefault(), "%d/%d", position + 1, urls.length);
+    }
+}