New list with sticky list headers library

1 files changed, 75 insertions, 5 deletions

diff --git a/OpenPGP-Keychain/src/org/sufficientlysecure/keychain/ui/adapter/KeyListPublicAdapter.java b/OpenPGP-Keychain/src/org/sufficientlysecure/keychain/ui/adapter/KeyListPublicAdapter.java
index d72c9d42a..86a47d4d7 100644
--- a/OpenPGP-Keychain/src/org/sufficientlysecure/keychain/ui/adapter/KeyListPublicAdapter.java
+++ b/OpenPGP-Keychain/src/org/sufficientlysecure/keychain/ui/adapter/KeyListPublicAdapter.java
@@ -17,30 +17,40 @@
 
 package org.sufficientlysecure.keychain.ui.adapter;
 
+import org.sufficientlysecure.keychain.Constants;
 import org.sufficientlysecure.keychain.R;
 import org.sufficientlysecure.keychain.helper.OtherHelper;
 import org.sufficientlysecure.keychain.provider.KeychainContract.UserIds;
-import org.sufficientlysecure.keychain.util.SectionCursorAdapter;
+import org.sufficientlysecure.keychain.util.Log;
 
+import se.emilsjolander.stickylistheaders.StickyListHeadersAdapter;
 import android.content.Context;
 import android.database.Cursor;
+import android.support.v4.widget.CursorAdapter;
 import android.view.LayoutInflater;
 import android.view.View;
 import android.view.ViewGroup;
 import android.widget.TextView;
 
-public class KeyListPublicAdapter extends SectionCursorAdapter {
-
+/**
+ * - implements StickyListHeadersAdapter from library - uses view holder pattern for performance
+ * 
+ */
+public class KeyListPublicAdapter extends CursorAdapter implements StickyListHeadersAdapter {
     private LayoutInflater mInflater;
 
-    public KeyListPublicAdapter(Context context, Cursor c, int flags) {
-        super(context, c, android.R.layout.preference_category, 2); // TODO: 2 is user id
+    int mSectionColumnIndex;
+
+    public KeyListPublicAdapter(Context context, Cursor c, int flags, int sectionColumnIndex) {
+        super(context, c, flags);
 
         mInflater = LayoutInflater.from(context);
+        mSectionColumnIndex = sectionColumnIndex;
     }
 
     @Override
     public void bindView(View view, Context context, Cursor cursor) {
+        // TODO: view holder pattern?
         int userIdIndex = cursor.getColumnIndex(UserIds.USER_ID);
 
         TextView mainUserId = (TextView) view.findViewById(R.id.mainUserId);
@@ -74,4 +84,64 @@ public class KeyListPublicAdapter extends SectionCursorAdapter {
         return mInflater.inflate(R.layout.key_list_group_item, null);
     }
 
+    @Override
+    public View getHeaderView(int position, View convertView, ViewGroup parent) {
+
+        HeaderViewHolder holder;
+        if (convertView == null) {
+            holder = new HeaderViewHolder();
+            convertView = mInflater.inflate(R.layout.stickylist_header, parent, false);
+            holder.text = (TextView) convertView.findViewById(R.id.stickylist_header_text);
+            convertView.setTag(holder);
+        } else {
+            holder = (HeaderViewHolder) convertView.getTag();
+        }
+
+        if (!mDataValid) {
+            // no data available at this point
+            Log.d(Constants.TAG, "getHeaderView: No data available at this point!");
+            return convertView;
+        }
+
+        // similar to getView in CursorAdapter
+        if (!mCursor.moveToPosition(position)) {
+            throw new IllegalStateException("couldn't move cursor to position " + position);
+        }
+
+        // set header text as first char in name
+        String headerText = "" + mCursor.getString(mSectionColumnIndex).subSequence(0, 1).charAt(0);
+        holder.text.setText(headerText);
+        return convertView;
+    }
+
+    /**
+     * Remember that these have to be static, position=1 should always return the same Id that is.
+     */
+    @Override
+    public long getHeaderId(int position) {
+        if (!mDataValid) {
+            // no data available at this point
+            Log.d(Constants.TAG, "getHeaderView: No data available at this point!");
+            return -1;
+        }
+
+        // similar to getView in CursorAdapter
+        if (!mCursor.moveToPosition(position)) {
+            throw new IllegalStateException("couldn't move cursor to position " + position);
+        }
+
+        // return the first character of the name as ID because this is what
+        // headers are based upon
+        return mCursor.getString(mSectionColumnIndex).subSequence(0, 1).charAt(0);
+    }
+
+    class HeaderViewHolder {
+        TextView text;
+    }
+
+    class ViewHolder {
+        TextView mainUserId;
+        TextView mainUserIdRest;
+    }
+
 }