/***
Copyright (c) 2008-2015 CommonsWare, LLC
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.
Covered in detail in the book _The Busy Coder's Guide to Android Development_
https://commonsware.com/Android
*/
package com.commonsware.android.snackbar.action;
import android.app.ListFragment;
import android.os.AsyncTask;
import android.os.Bundle;
import android.os.SystemClock;
import android.view.View;
import android.widget.ArrayAdapter;
import com.commonsware.cwac.crossport.design.widget.Snackbar;
import java.util.ArrayList;
public class AsyncDemoFragment extends ListFragment {
private static final String[] items= { "lorem", "ipsum", "dolor",
"sit", "amet", "consectetuer", "adipiscing", "elit", "morbi",
"vel", "ligula", "vitae", "arcu", "aliquet", "mollis", "etiam",
"vel", "erat", "placerat", "ante", "porttitor", "sodales",
"pellentesque", "augue", "purus" };
private ArrayList<String> model=new ArrayList<String>();
private ArrayAdapter<String> adapter=null;
private AddStringTask task=null;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setRetainInstance(true);
adapter=
new ArrayAdapter<String>(getActivity(),
android.R.layout.simple_list_item_1,
model);
loadModel();
}
@Override
public void onViewCreated(View v, Bundle savedInstanceState) {
super.onViewCreated(v, savedInstanceState);
getListView().setScrollbarFadingEnabled(false);
setListAdapter(adapter);
}
@Override
public void onDestroy() {
if (task != null) {
task.cancel(false);
}
super.onDestroy();
}
private void loadModel() {
task=new AddStringTask();
task.execute();
}
class AddStringTask extends AsyncTask<Void, String, Void> {
@Override
protected Void doInBackground(Void... unused) {
for (String item : items) {
if (isCancelled())
break;
publishProgress(item);
SystemClock.sleep(400);
}
return(null);
}
@Override
protected void onProgressUpdate(String... item) {
if (!isCancelled()) {
adapter.add(item[0]);
}
}
@Override
protected void onPostExecute(Void unused) {
Snackbar munchie=Snackbar.make(getListView(), R.string.done,
Snackbar.LENGTH_LONG);
munchie.setAction(R.string.snackbar_action_restart,
new View.OnClickListener() {
@Override
public void onClick(View view) {
adapter.clear();
loadModel();
}
});
munchie.show();
task=null;
}
}
}