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/*
* Copyright (C) 2011 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.android.contacts.common.list;
import android.content.Context;
import android.content.CursorLoader;
import android.database.Cursor;
import android.database.MatrixCursor;
import android.database.MergeCursor;
import android.os.Bundle;
import android.provider.ContactsContract.Profile;
import com.google.common.collect.Lists;
import java.util.List;
/**
* A loader for use in the default contact list, which will also query for the user's profile
* if configured to do so.
*/
public class ProfileAndContactsLoader extends CursorLoader {
private boolean mLoadProfile;
private String[] mProjection;
public ProfileAndContactsLoader(Context context) {
super(context);
}
public void setLoadProfile(boolean flag) {
mLoadProfile = flag;
}
public void setProjection(String[] projection) {
super.setProjection(projection);
mProjection = projection;
}
@Override
public Cursor loadInBackground() {
// First load the profile, if enabled.
List<Cursor> cursors = Lists.newArrayList();
if (mLoadProfile) {
cursors.add(loadProfile());
}
// ContactsCursor.loadInBackground() can return null; MergeCursor
// correctly handles null cursors.
Cursor cursor = null;
try {
cursor = super.loadInBackground();
} catch (NullPointerException e) {
// Ignore NPEs thrown by providers
}
final Cursor contactsCursor = cursor;
cursors.add(contactsCursor);
return new MergeCursor(cursors.toArray(new Cursor[cursors.size()])) {
@Override
public Bundle getExtras() {
// Need to get the extras from the contacts cursor.
return contactsCursor == null ? new Bundle() : contactsCursor.getExtras();
}
};
}
/**
* Loads the profile into a MatrixCursor. On failure returns null, which
* matches the behavior of CursorLoader.loadInBackground().
*
* @return MatrixCursor containing profile or null on query failure.
*/
private MatrixCursor loadProfile() {
Cursor cursor = getContext().getContentResolver().query(Profile.CONTENT_URI, mProjection,
null, null, null);
if (cursor == null) {
return null;
}
try {
MatrixCursor matrix = new MatrixCursor(mProjection);
Object[] row = new Object[mProjection.length];
while (cursor.moveToNext()) {
for (int i = 0; i < row.length; i++) {
row[i] = cursor.getString(i);
}
matrix.addRow(row);
}
return matrix;
} finally {
cursor.close();
}
}
}
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