Android Open Source - ElevationLogger Home Activity

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Back to project page ElevationLogger.

License

The source code is released under:

GNU General Public License

Java Source Code

package de.smashnet.elevationlogger;
// w  ww  . j  ava  2  s.  com
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.LinkedList;
import java.util.Locale;

import android.app.ActionBar;
import android.app.FragmentTransaction;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.content.IntentFilter;
import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentActivity;
import android.support.v4.app.FragmentManager;
import android.support.v4.app.FragmentPagerAdapter;
import android.support.v4.content.LocalBroadcastManager;
import android.support.v4.view.ViewPager;
import android.view.LayoutInflater;
import android.view.Menu;
import android.view.View;
import android.view.ViewGroup;
import android.widget.LinearLayout;
import android.widget.TextView;

/**
 * Main view of the ElevationLogger Android tool. 
 * 
 * @author Nicolas Inden
 * @contact nicolas.inden@smashnet.de
 * @date 29.12.2013
 */
public class HomeActivity extends FragmentActivity implements
    ActionBar.TabListener {

  /**
   * The {@link android.support.v4.view.PagerAdapter} that will provide
   * fragments for each of the sections. We use a
   * {@link android.support.v4.app.FragmentPagerAdapter} derivative, which
   * will keep every loaded fragment in memory. If this becomes too memory
   * intensive, it may be best to switch to a
   * {@link android.support.v4.app.FragmentStatePagerAdapter}.
   */
  SectionsPagerAdapter mSectionsPagerAdapter;
  
  /**
   * Our handler for received Intents. This will be called whenever an Intent
   * with an action named "custom-event-name" is broadcasted.
   */
  private BroadcastReceiver mMessageReceiverComplete = new SensorDataCompleteReceiver();
  private BroadcastReceiver mMessageReceiverPressure = new SensorDataPressureReceiver();
  private BroadcastReceiver mMessageReceiverTraceList = new TraceListReceiver();

  /**
   * The {@link ViewPager} that will host the section contents.
   */
  ViewPager mViewPager;
  
  /**
   * SensorService running
   */
  boolean mServiceRunning = false;

  @Override
  protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_home);

    // Set up the action bar.
    final ActionBar actionBar = getActionBar();
    actionBar.setNavigationMode(ActionBar.NAVIGATION_MODE_TABS);

    // Create the adapter that will return a fragment for each of the three
    // primary sections of the app.
    mSectionsPagerAdapter = new SectionsPagerAdapter(
        getSupportFragmentManager());

    // Set up the ViewPager with the sections adapter.
    mViewPager = (ViewPager) findViewById(R.id.pager);
    mViewPager.setAdapter(mSectionsPagerAdapter);

    // When swiping between different sections, select the corresponding
    // tab. We can also use ActionBar.Tab#select() to do this if we have
    // a reference to the Tab.
    mViewPager.setOnPageChangeListener(new ViewPager.SimpleOnPageChangeListener() {
          @Override
          public void onPageSelected(int position) {
            actionBar.setSelectedNavigationItem(position);
          }
        });

    // For each of the sections in the app, add a tab to the action bar.
    for (int i = 0; i < mSectionsPagerAdapter.getCount(); i++) {
      // Create a tab with text corresponding to the page title defined by
      // the adapter. Also specify this Activity object, which implements
      // the TabListener interface, as the callback (listener) for when
      // this tab is selected.
      actionBar.addTab(actionBar.newTab()
          .setText(mSectionsPagerAdapter.getPageTitle(i))
          .setTabListener(this));
    }
    
    // Register to receive messages.
    // We are registering an observer (mMessageReceiver) to receive Intents
    // with actions named "sensor-data".
    LocalBroadcastManager.getInstance(this).registerReceiver(mMessageReceiverComplete,
        new IntentFilter("sensor-data-complete"));
    LocalBroadcastManager.getInstance(this).registerReceiver(mMessageReceiverPressure,
      new IntentFilter("sensor-data-pressure"));
    LocalBroadcastManager.getInstance(this).registerReceiver(mMessageReceiverTraceList,
        new IntentFilter("send-trace-list"));
  }

  @Override
  public boolean onCreateOptionsMenu(Menu menu) {
    // Inflate the menu; this adds items to the action bar if it is present.
    getMenuInflater().inflate(R.menu.home, menu);
    return true;
  }
  
  @Override
  public void onResume() {
    super.onResume();
  }
  
  @Override
  public void onPause() {
    super.onPause();
  }
  
  @Override
  public void onStop() {
    super.onStop();
  }
  
  @Override
  public void onDestroy() {
    super.onDestroy();
  }

  @Override
  public void onTabSelected(ActionBar.Tab tab, FragmentTransaction fragmentTransaction) {
    // When the given tab is selected, switch to the corresponding page in
    // the ViewPager.
    mViewPager.setCurrentItem(tab.getPosition());
  }

  @Override
  public void onTabUnselected(ActionBar.Tab tab, FragmentTransaction fragmentTransaction) {
  }

  @Override
  public void onTabReselected(ActionBar.Tab tab, FragmentTransaction fragmentTransaction) {
  }
  
  /**
   * If the Toggle Service button is pushed, the SensorService is toggled.
   * Hell, did you expect that??
   * 
   * @param view
   */
  public void onToggleService(View view) {
    if(!mServiceRunning) {
      // Start SensorService
      Intent i = new Intent(this, SensorService.class);
      this.startService(i);
      mServiceRunning = true;
      
      // Feedback for user on home-tab
      writeLog("Enabled SensorService! (be patient ;)");
    }else{
      // Stop SensorService
      Intent i = new Intent(this, SensorService.class);
      this.stopService(i);
      mServiceRunning = false;
      
      // Feedback for user on home-tab
      writeLog("Disabled SensorService!");
    }
  }
  
  /**
   * This one is invoked if the "Send Results" button is pushed. It processes so far
   * unprocessed GPX files written by the SensorService. GPX files are converted into
   * simple traces (location,pressure) tuples. (Lat,Lon) locations are mapped to
   * nearest OSM node.
   * 
   * @param view
   */
  public void onSendResults(View view) {
    //So far just testing content
    writeLog("Test");
  }
  
  /**
   * Little helper to write text to the event log of HomeActivity.
   * 
   * @param text the text to be displayed
   */
  public void writeLog(String text) {
    // Create readable date string
    Date time = new Date();
    SimpleDateFormat sDateFormat = new SimpleDateFormat("yyMMdd-HHmmss", Locale.GERMANY);
    String date = sDateFormat.format(time);
    
    TextView welcome = new TextView(this);
    LinearLayout log = (LinearLayout) findViewById(R.id.linlay_log);
    welcome.setText(date + ": " + text);
    
    log.addView(welcome);
  }
  
  /**
   * Custom receiver for sensor data from SensorService
   * @author Nicolas Inden
   */
  public class SensorDataCompleteReceiver extends BroadcastReceiver {

    @Override
    public void onReceive(Context context, Intent intent) {
      double lat, lon, alt, dist;
      float acc, pressure;
      long time, osm_id;
      
      // Get extra data included in the Intent
        lat = intent.getDoubleExtra("lat", -1.0);
        if(lat == -1.0)
          return;
        lon = intent.getDoubleExtra("lon", -1.0);
        if(lon == -1.0)
          return;
        alt = intent.getDoubleExtra("alt", -1.0);
        if(alt == -1.0)
          return;
        acc = intent.getFloatExtra("acc", -1.0f);
        if(acc == -1.0f)
          return;
        pressure = intent.getFloatExtra("pres", -1.0f);
        if(pressure == -1.0f)
          return;
        
        osm_id = intent.getLongExtra("osm_id", -1);
        dist = intent.getDoubleExtra("osm_distance", -1.0d);
        
        time = intent.getLongExtra("time", 0);
        if(time == 0)
          return;
        
        // Output raw values in raw-value-tab
        TextView latRes = (TextView) findViewById(R.id.tv_lat_res);
        TextView lonRes = (TextView) findViewById(R.id.tv_long_res);
        TextView altRes = (TextView) findViewById(R.id.tv_alt_res);
        TextView accRes = (TextView) findViewById(R.id.tv_acc_res);
        TextView preRes = (TextView) findViewById(R.id.tv_air_pressure_res);
        TextView osmRes = (TextView) findViewById(R.id.tv_osm_id_res);
        TextView distRes = (TextView) findViewById(R.id.tv_osm_dist_res);
        TextView timRes = (TextView) findViewById(R.id.tv_time_res);
        
        SimpleDateFormat sDateFormat = new SimpleDateFormat("dd.MM.yy HH:mm:ss", Locale.GERMANY);
      String date = sDateFormat.format(time);
        
        latRes.setText(String.valueOf(lat));
        lonRes.setText(String.valueOf(lon));
        altRes.setText(String.valueOf(alt) + " m");
        accRes.setText(String.valueOf(acc) + " m");
        preRes.setText(String.valueOf(pressure) + " mBar");
        if(osm_id > 0) {
          osmRes.setText(String.valueOf(osm_id));
        } else {
          osmRes.setText("-");
        }
        if(dist > 0.0) {
          distRes.setText(String.valueOf(dist) + " m");
        } else {
          distRes.setText("-");
        }
        timRes.setText(date);
    }
    
  }
  
  /**
   * Custom receiver for sensor data from SensorService
   * @author Nicolas Inden
   */
  public class SensorDataPressureReceiver extends BroadcastReceiver {

    @Override
    public void onReceive(Context context, Intent intent) {
      float pressure;
      
      pressure = intent.getFloatExtra("pres", -1.0f);
        if(pressure == -1.0f)
          return;
        
        TextView preRes = (TextView) findViewById(R.id.tv_air_pressure_res);
        TextView preAlt = (TextView) findViewById(R.id.tv_air_altitude_res);
        preRes.setText(String.valueOf(pressure) + " mBar");
        double res = -((Math.pow(pressure/1013.25,1/5.255) - 1) * 288.15)/0.0065;
        preAlt.setText(String.format("%.2f", res) + " m");
    }
    
  }
  
  /**
   * Custom receiver to receive trace list data from SensorService
   * @author Nicolas Inden
   */
  public class TraceListReceiver extends BroadcastReceiver {

    @Override
    public void onReceive(Context context, Intent intent) {
      LinearLayout traceLayout = (LinearLayout) findViewById(R.id.linlay_traces);
      @SuppressWarnings("unchecked")
      LinkedList<LocationTrace> traces = (LinkedList<LocationTrace>) intent.getSerializableExtra("Traces");
      
      for(LocationTrace lt : traces) {
        StringBuilder sb = new StringBuilder();

        SimpleDateFormat sDateFormat = new SimpleDateFormat("dd.MM.yy-HH:mm", Locale.GERMANY);
        String date = sDateFormat.format(lt.getDate());

        sb.append(date + " | Length: ");
        sb.append(lt.getLength());
        sb.append(" nodes. | Is Uploaded: ");
        sb.append(lt.isUploaded());
        
        TextView tv = new TextView(context);
        tv.setText(sb.toString());
        traceLayout.addView(tv);
      }
    }
    
  }

  /**
   * A {@link FragmentPagerAdapter} that returns a fragment corresponding to
   * one of the sections/tabs/pages.
   */
  public class SectionsPagerAdapter extends FragmentPagerAdapter {

    public SectionsPagerAdapter(FragmentManager fm) {
      super(fm);
    }

    @Override
    public Fragment getItem(int position) {
      // getItem is called to instantiate the fragment for the given page.
      // Return a DummySectionFragment (defined as a static inner class
      // below) with the page number as its lone argument.
      Fragment fragment = new HomeActivityFragment();
      Bundle args = new Bundle();
      args.putInt(HomeActivityFragment.ARG_SECTION_NUMBER, position + 1);
      fragment.setArguments(args);
      return fragment;
    }

    @Override
    public int getCount() {
      // Show 3 total pages.
      return 3;
    }

    @Override
    public CharSequence getPageTitle(int position) {
      Locale l = Locale.getDefault();
      switch (position) {
      case 0:
        return getString(R.string.title_section1).toUpperCase(l);
      case 1:
        return getString(R.string.title_section2).toUpperCase(l);
      case 2:
        return getString(R.string.title_section3).toUpperCase(l);
      }
      return null;
    }
  }

  /**
   * A dummy fragment representing a section of the app, but that simply
   * displays dummy text.
   */
  public static class HomeActivityFragment extends Fragment {
    /**
     * The fragment argument representing the section number for this
     * fragment.
     */
    public static final String ARG_SECTION_NUMBER = "section_number";

    public HomeActivityFragment() {
    }

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
      int section = getArguments().getInt(ARG_SECTION_NUMBER);
      View rootView;
      switch(section){
      case 1:
        rootView = inflater.inflate(R.layout.fragment_home_home, container, false);
        onCreateHome(rootView);
        break;
      case 2:
        rootView = inflater.inflate(R.layout.fragment_home_raw, container, false);
        onCreateRawView(rootView);
        break;
      case 3:
        rootView = inflater.inflate(R.layout.fragment_home_tracelist, container, false);
        onCreateTraceList(rootView);
        break;
      default:
        rootView = inflater.inflate(R.layout.fragment_home_tracelist, container, false);
        TextView dummyTextView = (TextView) rootView.findViewById(R.id.section_label);
        dummyTextView.setText(Integer.toString(getArguments().getInt(ARG_SECTION_NUMBER)));  
      }
      
      return rootView;
    }

    private void onCreateTraceList(View rootView) {
      // Ask SensorService for current tracelist
      Intent intent = new Intent("get-trace-list");
      LocalBroadcastManager.getInstance(rootView.getContext()).sendBroadcast(intent);
    }

    private void onCreateRawView(View rootView) {
      
    }

    private void onCreateHome(View rootView) {

    }
  }
}

Java Source Code List

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