The first thing that i have to say is render thanks to johannilsson because all the part of pull to refresh listview is based in the code of his repository at https://github.com/johannilsson/android-pulltorefresh.
The target of this project is help other to apply the interaction pattern pull to refresh and load more on an android listview.
#Costum Load more listview for android
More information about load more interaction pattern at http://www.androidpatterns.com/uap_pattern/dynamic-loading-of-a-list
#Costum Pull to refresh listview for android
More information about pull to refresh interaction pattern at http://www.androidpatterns.com/uap_pattern/pull-to-refresh-2
Repository at https://github.com/shontauro/android-pulltorefresh-and-loadmore.
Usage
Layout for loadmore listview
<!-- We have to indicate that the listview is now a LoadMoreListView -->
<com.costum.android.widget.LoadMoreListView
android:id="@+id/android:list"
android:layout_width="fill_parent"
android:layout_height="fill_parent" />Activity to LoadMoreListView
// set a listener to be invoked when the list reaches the end
((LoadMoreListView) getListView())
.setOnLoadMoreListener(new OnLoadMoreListener() {
public void onLoadMore() {
// Do the work to load more items at the end of list here
new LoadDataTask().execute();
}
});
private class LoadDataTask extends AsyncTask<Void, Void, Void> {
@Override
protected Void doInBackground(Void... params) {
if (isCancelled()) {
return null;
}
// Simulates a background task
try {
Thread.sleep(1000);
} catch (InterruptedException e) {
}
for (int i = 0; i < mNames.length; i++)
mListItems.add(mNames[i]);
return null;
}
@Override
protected void onPostExecute(Void result) {
mListItems.add("Added after load more");
// We need notify the adapter that the data have been changed
((BaseAdapter) getListAdapter()).notifyDataSetChanged();
// Call onLoadMoreComplete when the LoadMore task, has finished
((LoadMoreListView) getListView()).onLoadMoreComplete();
super.onPostExecute(result);
}
@Override
protected void onCancelled() {
// Notify the loading more operation has finished
((LoadMoreListView) getListView()).onLoadMoreComplete();
}
}Layout for pullandload listview
<!-- We have to indicate that the listview is now a PullAndLoadListView -->
<com.costum.android.widget.PullAndLoadListView
android:id="@+id/android:list"
android:layout_width="fill_parent"
android:layout_height="fill_parent" />Activity to PullAndLoadListView
Here we have to pass two listeners one to pull operation and the other to load operation
// Set a listener to be invoked when the list should be refreshed.
((PullAndLoadListView) getListView())
.setOnRefreshListener(new OnRefreshListener() {
public void onRefresh() {
// Do work to refresh the list here.
new PullToRefreshDataTask().execute();
}
});
// set a listener to be invoked when the list reaches the end
((PullAndLoadListView) getListView())
.setOnLoadMoreListener(new OnLoadMoreListener() {
public void onLoadMore() {
// Do the work to load more items at the end of list
// here
new LoadMoreDataTask().execute();
}
});
private class LoadMoreDataTask extends AsyncTask<Void, Void, Void> {
@Override
protected Void doInBackground(Void... params) {
if (isCancelled()) {
return null;
}
// Simulates a background task
try {
Thread.sleep(1000);
} catch (InterruptedException e) {
}
for (int i = 0; i < mNames.length; i++)
mListItems.add(mNames[i]);
return null;
}
@Override
protected void onPostExecute(Void result) {
mListItems.add("Added after load more");
// We need notify the adapter that the data have been changed
((BaseAdapter) getListAdapter()).notifyDataSetChanged();
// Call onLoadMoreComplete when the LoadMore task, has finished
((PullAndLoadListView) getListView()).onLoadMoreComplete();
super.onPostExecute(result);
}
@Override
protected void onCancelled() {
// Notify the loading more operation has finished
((PullAndLoadListView) getListView()).onLoadMoreComplete();
}
}
private class PullToRefreshDataTask extends AsyncTask<Void, Void, Void> {
@Override
protected Void doInBackground(Void... params) {
if (isCancelled()) {
return null;
}
// Simulates a background task
try {
Thread.sleep(1000);
} catch (InterruptedException e) {
}
for (int i = 0; i < mAnimals.length; i++)
mListItems.addFirst(mAnimals[i]);
return null;
}
@Override
protected void onPostExecute(Void result) {
mListItems.addFirst("Added after pull to refresh");
// We need notify the adapter that the data have been changed
((BaseAdapter) getListAdapter()).notifyDataSetChanged();
// Call onLoadMoreComplete when the LoadMore task, has finished
((PullAndLoadListView) getListView()).onRefreshComplete();
super.onPostExecute(result);
}
@Override
protected void onCancelled() {
// Notify the loading more operation has finished
((PullAndLoadListView) getListView()).onLoadMoreComplete();
}
}License
Licensed under the Apache License, Version 2.0
Copyright (c) 2012 Fabian Leon