Java tutorial
/* * Copyright (C) 2011-2015 asksven * * 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 *et * 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.asksven.betterbatterystats; /** * Shows alarms in a list * @author sven */ import java.util.ArrayList; import android.app.ProgressDialog; import android.content.SharedPreferences; import android.os.AsyncTask; import android.os.Bundle; import android.os.SystemClock; import android.preference.PreferenceManager; import android.support.design.widget.Snackbar; import android.support.v4.widget.SwipeRefreshLayout; import android.support.v7.widget.Toolbar; import android.util.Log; import android.view.Menu; import android.view.MenuInflater; import android.view.MenuItem; import android.view.View; import android.widget.AdapterView; import android.widget.ArrayAdapter; import android.widget.Spinner; import android.widget.TextView; import android.widget.Toast; import com.asksven.android.common.privateapiproxies.BatteryInfoUnavailableException; import com.asksven.android.common.privateapiproxies.BatteryStatsProxy; import com.asksven.android.common.privateapiproxies.StatElement; import com.asksven.android.common.utils.DateUtils; import com.asksven.betterbatterystats.R; import com.asksven.betterbatterystats.adapters.StatsAdapter; import com.asksven.betterbatterystats.data.StatsProvider; public class RawStatsActivity extends ActionBarListActivity implements AdapterView.OnItemSelectedListener { /** * The logging TAG */ private static final String TAG = "RawStatsActivity"; /** * The Stat to be displayed */ private int m_iStat = 0; /** * The ArrayAdpater for rendering the ListView */ private StatsAdapter m_listViewAdapter; private SwipeRefreshLayout swipeLayout = null; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.raw_stats); Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar); toolbar.setTitle(getString(R.string.label_raw_stats)); setSupportActionBar(toolbar); getSupportActionBar().setDisplayHomeAsUpEnabled(true); getSupportActionBar().setDisplayUseLogoEnabled(false); swipeLayout = (SwipeRefreshLayout) findViewById(R.id.swiperefresh); swipeLayout.setOnRefreshListener(new SwipeRefreshLayout.OnRefreshListener() { @Override public void onRefresh() { doRefresh(); } }); // Spinner for selecting the stat Spinner spinnerStat = (Spinner) findViewById(R.id.spinnerStat); ArrayAdapter spinnerStatAdapter = ArrayAdapter.createFromResource(this, R.array.stats, R.layout.bbs_spinner_layout); spinnerStatAdapter.setDropDownViewResource(R.layout.bbs_spinner_dropdown_item); spinnerStat.setAdapter(spinnerStatAdapter); // setSelection MUST be called after setAdapter spinnerStat.setSelection(m_iStat); spinnerStat.setOnItemSelectedListener(this); TextView tvSince = (TextView) findViewById(R.id.TextViewSince); long sinceMs = SystemClock.elapsedRealtime(); if (sinceMs != -1) { String sinceText = DateUtils.formatDuration(sinceMs); tvSince.setText(sinceText); Log.i(TAG, "Since " + sinceText); } else { tvSince.setText("n/a "); Log.i(TAG, "Since: n/a "); } } /* Request updates at startup */ @Override protected void onResume() { super.onResume(); new LoadStatData().execute(this); } private void doRefresh() { BatteryStatsProxy.getInstance(this).invalidate(); new LoadStatData().execute(this); if (m_listViewAdapter != null) { m_listViewAdapter.notifyDataSetChanged(); } } /** * Take the change of selection from the spinners into account and refresh the ListView * with the right data */ public void onItemSelected(AdapterView<?> parent, View v, int position, long id) { // this method is fired even if nothing has changed so we nee to find that out SharedPreferences sharedPrefs = PreferenceManager.getDefaultSharedPreferences(this); boolean bChanged = false; // id is in the order of the spinners, 0 is stat, 1 is stat_type if (parent == (Spinner) findViewById(R.id.spinnerStat)) { int iNewStat = position; if (m_iStat != iNewStat) { m_iStat = iNewStat; bChanged = true; } else { return; } } else { Log.e(TAG, "RawStatsActivity.onItemSelected error. ID could not be resolved"); Toast.makeText(this, getString(R.string.info_unknown_state), Toast.LENGTH_SHORT).show(); } if (bChanged) { doRefresh(); } } public void onNothingSelected(AdapterView<?> parent) { // do nothing } // @see http://code.google.com/p/makemachine/source/browse/trunk/android/examples/async_task/src/makemachine/android/examples/async/AsyncTaskExample.java // for more details private class LoadStatData extends AsyncTask<Object, Integer, StatsAdapter> { private Exception m_exception = null; @Override protected StatsAdapter doInBackground(Object... refresh) { m_listViewAdapter = null; try { Log.i(TAG, "LoadStatData: refreshing display for raw stats"); ArrayList<StatElement> stats = null; StatsProvider provider = StatsProvider.getInstance(); // constants are related to arrays.xml string-array name="stats" switch (m_iStat) { case 0: stats = provider.getCurrentOtherUsageStatList(true, false, false); break; case 1: stats = provider.getCurrentKernelWakelockStatList(false, 0, 0); break; case 2: stats = provider.getCurrentWakelockStatList(false, 0, 0); break; case 3: stats = provider.getCurrentAlarmsStatList(false); break; case 4: stats = provider.getCurrentNetworkUsageStatList(false); break; case 5: stats = provider.getCurrentCpuStateList(false); break; case 6: stats = provider.getCurrentProcessStatList(false, 0); break; case 7: stats = provider.getCurrentSensorStatList(false); break; } m_listViewAdapter = new StatsAdapter(RawStatsActivity.this, stats, RawStatsActivity.this); } catch (BatteryInfoUnavailableException e) { //Log.e(TAG, e.getMessage(), e.fillInStackTrace()); Log.e(TAG, "Exception: " + Log.getStackTraceString(e)); m_exception = e; } catch (Exception e) { //Log.e(TAG, e.getMessage(), e.fillInStackTrace()); Log.e(TAG, "Exception: " + Log.getStackTraceString(e)); m_exception = e; } //StatsActivity.this.setListAdapter(m_listViewAdapter); // getStatList(); return m_listViewAdapter; } // @Override protected void onPostExecute(StatsAdapter o) { swipeLayout.setRefreshing(false); if (m_exception != null) { if (m_exception instanceof BatteryInfoUnavailableException) { Snackbar.make(findViewById(android.R.id.content), R.string.info_service_connection_error, Snackbar.LENGTH_LONG).show(); // Toast.makeText(RawStatsActivity.this, // getString(R.string.info_service_connection_error), // Toast.LENGTH_LONG).show(); } else { Snackbar.make(findViewById(android.R.id.content), R.string.info_unknown_stat_error, Snackbar.LENGTH_LONG).show(); // // Toast.makeText(RawStatsActivity.this, // getString(R.string.info_unknown_stat_error), // Toast.LENGTH_LONG).show(); } } if (o != null) { o.setTotalTime(SystemClock.elapsedRealtime()); } RawStatsActivity.this.setListAdapter(o); } // @Override protected void onPreExecute() { swipeLayout.setRefreshing(true); } } }