Java tutorial
/* * Copyright 2013 Thanasis Georgiou * * 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.sakisds.icymonitor.fragments.disk; import android.content.Context; import android.content.SharedPreferences; import android.content.res.Resources; import android.os.Bundle; import android.support.v4.app.ListFragment; import android.view.LayoutInflater; import android.view.View; import android.view.ViewGroup; import android.widget.ArrayAdapter; import android.widget.ProgressBar; import android.widget.TextView; import com.loopj.android.http.AsyncHttpClient; import com.loopj.android.http.JsonHttpResponseHandler; import com.loopj.android.http.RequestParams; import com.sakisds.icymonitor.R; import com.sakisds.icymonitor.activities.MainViewActivity; import com.sakisds.icymonitor.dataobj.DiskInfo; import org.json.JSONArray; import org.json.JSONException; import org.json.JSONObject; import uk.co.senab.actionbarpulltorefresh.library.ActionBarPullToRefresh; import uk.co.senab.actionbarpulltorefresh.library.PullToRefreshLayout; import uk.co.senab.actionbarpulltorefresh.library.listeners.OnRefreshListener; /** * Disk fragment. * Created by sakisds on 18/06/13. */ public class DiskFSFragment extends ListFragment implements OnRefreshListener, View.OnClickListener { private PullToRefreshLayout mPullToRefreshLayout; private SharedPreferences mSettings; private View mEmptyView, mProgressBar; private boolean mFirstTime = true; @Override public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) { View mRootView = inflater.inflate(R.layout.fragment_list, container, false); mSettings = getActivity().getSharedPreferences(MainViewActivity.SHAREDPREFS_FILE, Context.MODE_PRIVATE); return mRootView; } @Override public void onViewCreated(View view, Bundle savedInstanceState) { super.onViewCreated(view, savedInstanceState); ViewGroup viewGroup = (ViewGroup) view; mEmptyView = view.findViewById(R.id.emptyhidden); mEmptyView.setOnClickListener(this); mProgressBar = view.findViewById(R.id.progressBar_list); mPullToRefreshLayout = new PullToRefreshLayout(viewGroup.getContext()); ActionBarPullToRefresh.from(getActivity()).insertLayoutInto(viewGroup) .theseChildrenArePullable(android.R.id.list, android.R.id.empty).listener(this) .setup(mPullToRefreshLayout); // Refresh fragment data refreshData(); } /** * Refresh the list. */ private void refreshData() { AsyncHttpClient client = new AsyncHttpClient(); client.setMaxRetriesAndTimeout(2, 2000); String url = getActivity().getIntent().getStringExtra(MainViewActivity.EXTRA_ADDRESS) + "/data"; RequestParams params = new RequestParams(); params.put("type", "fs"); params.put("id", String.valueOf(mSettings.getLong("device_id", -2))); client.get(url, params, new DisksHttpResponseHandler()); } @Override public void onRefreshStarted(View view) { refreshData(); } @Override public void onClick(View view) { mPullToRefreshLayout.setRefreshing(true); refreshData(); } private class DisksListArrayAdapter extends ArrayAdapter<DiskInfo> { private final DiskInfo[] mDisksInfo; private final Context mContext; public DisksListArrayAdapter(Context context, DiskInfo[] disks) { super(context, R.layout.list_item_disk, disks); mDisksInfo = disks; mContext = context; } @Override public View getView(int position, View convertView, ViewGroup parent) { LayoutInflater inflater = (LayoutInflater) mContext.getSystemService(Context.LAYOUT_INFLATER_SERVICE); View rowView = inflater.inflate(R.layout.list_item_disk, parent, false); // Set data DiskInfo disk = mDisksInfo[position]; float used = 1 - (disk.getFree() / disk.getSize()); int usedPercent = Math.round(used * 100); if (disk.getLabel().equals("N/A")) { ((TextView) rowView.findViewById(R.id.textView_name)).setText(disk.getName()); } else { ((TextView) rowView.findViewById(R.id.textView_name)) .setText(disk.getName() + " - " + disk.getLabel()); } Resources res = getResources(); ((TextView) rowView.findViewById(R.id.textView_size)) .setText(String.format(res.getString(R.string.size), disk.getSize())); ((TextView) rowView.findViewById(R.id.textView_free)) .setText(String.format(res.getString(R.string.free), disk.getFree())); ((TextView) rowView.findViewById(R.id.textView_format)) .setText(String.format(res.getString(R.string.format), disk.getFormat())); ProgressBar progressBar = (ProgressBar) rowView.findViewById(R.id.progressBar_disk); if (usedPercent > 0) { ((TextView) rowView.findViewById(R.id.textView_percent)).setText(usedPercent + "%"); progressBar.setProgress(usedPercent); } else { ((TextView) rowView.findViewById(R.id.textView_percent)).setText("<" + usedPercent + "%"); progressBar.setProgress(1); } if (usedPercent > 90) { progressBar.setBackgroundResource(R.drawable.progress_background_red); } // Return view to be displayed return rowView; } } private class DisksHttpResponseHandler extends JsonHttpResponseHandler { @Override public void onSuccess(JSONArray response) { // Load temperature info mProgressBar.setVisibility(View.GONE); DiskInfo[] diskInfo = null; try { int length = response.length(); diskInfo = new DiskInfo[length]; for (int i = 0; i < length; i++) { JSONObject data = response.getJSONObject(i); String name = String.format(getResources().getString(R.string.drive), data.getString("Name")); DiskInfo disk = new DiskInfo(name, data.getString("Label"), data.getString("Format"), (float) data.getDouble("Size"), (float) data.getDouble("Free")); diskInfo[i] = disk; } // Set list array if (!mFirstTime) getListView().setVisibility(View.INVISIBLE); setListAdapter(new DisksListArrayAdapter(getActivity(), diskInfo)); if (mFirstTime) mFirstTime = false; else getListView().setVisibility(View.VISIBLE); mPullToRefreshLayout.setRefreshComplete(); } catch (JSONException e) { // Empty list and set error mProgressBar.setVisibility(View.GONE); setListAdapter(new DisksListArrayAdapter(getActivity(), new DiskInfo[0])); mEmptyView.setVisibility(View.VISIBLE); mPullToRefreshLayout.setRefreshComplete(); } } public void onFailure(Throwable e, JSONObject response) { // Empty list and set error mProgressBar.setVisibility(View.GONE); mEmptyView.setVisibility(View.VISIBLE); setListAdapter(new DisksListArrayAdapter(getActivity(), new DiskInfo[0])); mPullToRefreshLayout.setRefreshComplete(); } } }