Android Open Source - android-gps-uploader Main Activity

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Back to project page android-gps-uploader.

License

The source code is released under:

MIT License

Java Source Code

/** 
 * The MIT License (MIT)//w w w . j av  a  2  s  .co  m
 *
 * Copyright (c) 2014 John Nahlen (john.nahlen@gmail.com)
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 * */
package com.bughousedb.GPSTracker;

import android.os.Bundle;
import android.os.Handler;
import android.os.Message;
import android.os.Handler.Callback;
import android.app.Activity;
import android.content.Intent;
import android.content.SharedPreferences;
import android.text.method.ScrollingMovementMethod;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.TextView;

public class MainActivity extends Activity {
  @Override
  public boolean onOptionsItemSelected(MenuItem item) {
    switch (item.getItemId()) {
      case R.id.action_settings:
        // Start up the SettingsActivity class to manage app preferences
        Intent intent = new Intent();
        intent.setClass(getApplicationContext(), SettingsActivity.class);
        startActivity(intent);
        return true;
      default:
        return super.onOptionsItemSelected(item);
    }
  }

  private static GPSTracker gpsTracker;
  private static Handler textViewUpdateHandler;
  
  public static GPSTracker getGPSTracker() {
    return gpsTracker;
  }
  
  private String deviceName = null;
  private TextView textView;
  private StringBuilder textViewContents;
  
  public void sendMessageToTextView(String messageString) {
    Message message = new Message();
    message.obj = messageString;
    getTextViewUpdateHandler().sendMessage(message);
  }
  
  @Override
  protected void onSaveInstanceState(Bundle bundle) {
    bundle.putString("textViewContents", textViewContents.toString());
    bundle.putString("start_stop_gps_btn_text",((Button)findViewById(R.id.start_stop_gps_btn)).getText().toString());
    bundle.putString("deviceName", this.deviceName);
  }
  
  @Override
  protected void onPause() {
    System.out.println("onPause()");
    super.onPause();
    if (textView != null) {
      textViewContents = new StringBuilder(textView.getText());
    }
  }
  
  @Override
  protected void onResume() {
    System.out.println("onResume()");
    super.onResume();
  }

  @Override
  protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    this.setTitle(R.string.app_title);
    setContentView(R.layout.activity_main);
    textViewContents = new StringBuilder();
    if (savedInstanceState != null) {
      textViewContents.append(savedInstanceState.getString("textViewContents"));
      this.deviceName = savedInstanceState.getString("deviceName");
    }
    
    textViewUpdateHandler = new Handler(new Callback() {
      public boolean handleMessage(Message msg) {
        String text = (String)msg.obj;
        appendText(text);
        return true;
      };
    });
    
    if (gpsTracker == null) {
      SharedPreferences preferences = getSharedPreferences("com.bughousedb.GPSTracker_preferences",MODE_PRIVATE);
      String deviceNameKey = getString(R.string.device_name);
      this.deviceName = preferences.getString(deviceNameKey, "Android Device");
      
      gpsTracker = new GPSTracker();
      gpsTracker.setUploadUrl(preferences.getString(getString(R.string.upload_url), null));
      gpsTracker.setUploadFrequency(Integer.parseInt(preferences.getString(getString(R.string.upload_interval), "15000")));
      gpsTracker.setMainActivity(this);
      gpsTracker.init();
      gpsTracker.start();
    }
    
    gpsTracker.setMainActivity(this);
    
    textView = (TextView)findViewById(R.id.textView1);
    textView.setMovementMethod(new ScrollingMovementMethod());
    if (textViewContents != null) {
      textView.setText(textViewContents.toString());
    }
    
    ((Button)findViewById(R.id.clear_log_btn)).setOnClickListener(new OnClickListener() {
      public void onClick(View v) {
        textView.setText("");
        textViewContents.delete(0,textViewContents.length());
        if (gpsTracker.getLastKnownLocation() != null) {
          appendText(String.format("Last Known Location:\n%s\n",Utils.locationToString(gpsTracker.getLastKnownLocation())));
        }
      }
    });
    
    
    ((Button)findViewById(R.id.close_app_btn)).setOnClickListener(new OnClickListener() {
      public void onClick(View v) {
        System.out.println("GPS Tracker exiting now");
        System.exit(0);
      }
    });
    
    final Button _btn = (Button)findViewById(R.id.start_stop_gps_btn);
    if (savedInstanceState != null) {
      _btn.setText(savedInstanceState.getString("start_stop_gps_btn_text"));
    }
    _btn.setOnClickListener(new OnClickListener() {
      public void onClick(View v) {
        final String start_gps = getString(R.string.start_gps);
        final String stop_gps = getString(R.string.stop_gps);
        
        if (_btn.getText().equals(stop_gps)) {
          gpsTracker.stop();
          _btn.setText(start_gps);
          sendMessageToTextView("GPS Tracker Service has stopped\n");
        } else if (_btn.getText().equals(start_gps)) {
          gpsTracker.start();
          _btn.setText(stop_gps);
          sendMessageToTextView("GPS Tracker Service has started\n");
        }
      }
    });
  }
  
  @Override
  public void onLowMemory() {
    System.out.println("onLowMemory()");
    super.onLowMemory();
    gpsTracker.cleanup();
  }

  private void appendText(String text) {
    if (textView != null) {
      textView.append(text);
      
      if (textViewContents != null) {
        textViewContents.append(text);
      }
    }
  }

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

  public static Handler getTextViewUpdateHandler() {
    return textViewUpdateHandler;
  }

  public static void setTextViewUpdateHandler(Handler textViewUpdateHandler) {
    MainActivity.textViewUpdateHandler = textViewUpdateHandler;
  }

  public TextView getTextView() {
    return textView;
  }

  public String getDeviceName() {
    return deviceName;
  }
}

Java Source Code List

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