안드로이드에서 gps 사용 코드, 데몬스레드 사용

GPSOnSecondThread.java

import android.app.Activity;
import android.app.AlertDialog;
import android.content.Context;
import android.content.DialogInterface;
import android.content.Intent;
import android.location.Location;
import android.location.LocationListener;
import android.location.LocationManager;
import android.os.Bundle;
import android.os.Handler;
import android.os.HandlerThread;
import android.os.Message;
import android.provider.Settings;
import android.util.Log;
import android.view.View;
import android.widget.Button;
import android.widget.TextView;

import com.example.yeongjun_lab.myapplication.R;

public class GPSOnSecondThread extends Activity {
    final static String TAG_NAME = "GPSTestActitity";

    private TextView tvLat, tvLon;
    private Button btnStart, btnStop, btnRefresh;

    private double gps_latitude = 0;
    private double gps_longtitude;
    private double gps_current_speed = 0;
    private double gps_accuracy = 0;
    private double gps_altitude = 0;
    Context mContext;

    BackThread thread = null;

    private HandlerThread mThread;
    private LocationManager mLocationManager;
    private final LocationListener mLocationListener = new
            LocationListener() {

                @Override
                public void onLocationChanged(Location location) {
                    Log.i(TAG_NAME, "onLocationChanged, location = " +
                            location);
                    gps_latitude = location.getLatitude();
                    gps_longtitude = location.getLongitude();
                    gps_current_speed = location.getSpeed();
                    gps_accuracy = location.getAccuracy();
                    gps_altitude = location.getAltitude();
                }

                @Override
                public void onProviderDisabled(String provider) {
                }

                @Override
                public void onProviderEnabled(String provider) {
                }

                @Override
                public void onStatusChanged(String provider, int status, Bundle
                        extras) {
                }

            };


    @Override
    public void onCreate(final Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_gps_test);

        tvLat = (TextView) findViewById(R.id.tv_latitude1);
        tvLon = (TextView) findViewById(R.id.tv_longtitude1);

        btnStart = (Button) findViewById(R.id.btn_start1);
        btnStop = (Button) findViewById(R.id.btn_stop1);
        btnRefresh = (Button) findViewById(R.id.btn_refresh1);

        mContext = getApplicationContext();
        mLocationManager = (LocationManager)
                getSystemService(Context.LOCATION_SERVICE);

        tvLat.setText("초기값");
        tvLon.setText("초기값");

        btnRefresh.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
//                onThreadStart();
            }
        });

        btnStart.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                final boolean gpsEnabled = mLocationManager.isProviderEnabled(LocationManager.GPS_PROVIDER);

                if (!gpsEnabled) {
                    showGPSSettingsDialog();
                } else {
                    long minTime = 0;
                    float minDistance = 0;
                    mLocationManager.requestLocationUpdates(LocationManager.GPS_PROVIDER, minTime, minDistance, mLocationListener);
                    onGPSStart(v);
                }
            }
        });

        btnStop.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                onGPSStop(v);
                mLocationManager.removeUpdates(mLocationListener);
//                mThread.getLooper().quit();
            }
        });
    }

    class BackThread extends Thread {
        public void run() {
            while (true) {
                mHandler.sendEmptyMessage(0);
                try {
                    BackThread.sleep(500);
                } catch (InterruptedException e) {
                    break;
                } finally {
                }
            }

        }
    }

    // 스레드간의 통신장치
    // main ui 는 다른 thread에서 변경X
    // 그렇기 때문에 handler 사용.
    public Handler mHandler = new Handler() {
        public void handleMessage(Message msg) {
            tvLat.setText(Double.toString(gps_latitude));
            tvLon.setText(Double.toString(gps_longtitude));
            Log.i(TAG_NAME, "handleMessage, location = " +
                    gps_latitude + "," + gps_longtitude);
        }
    };

    public void onGPSStart(View v) {
        Log.i(TAG_NAME,"onGPSStart");
        if (thread == null || thread.getState() == Thread.State.TERMINATED) {
            thread = new BackThread();
            thread.setDaemon(true);
            thread.start();
            Log.i(TAG_NAME, "onGPSStart-thread.start()");
        } else if (thread.getState() == Thread.State.BLOCKED || thread.getState() == Thread.State.WAITING || thread.getState() == Thread.State.TIMED_WAITING
                || thread.getState() == Thread.State.RUNNABLE) {
            thread.notifyAll();
            Log.i(TAG_NAME, "onGPSStart-thread.notifyAll()");

        }
    }

    public void onGPSStop(View v) {
        Log.i(TAG_NAME, "onGPSStop");
        if (thread.getState() == Thread.State.RUNNABLE || thread.getState() == Thread.State.TIMED_WAITING || thread.getState() == Thread.State.BLOCKED
                || thread.getState() == Thread.State.WAITING)
            thread.interrupt();
        Log.i(TAG_NAME, "onGPSStop-thread.interrupt()");

        // android.os.Process.killProcess(android.os.Process.myPid());
    }

    public void showGPSSettingsDialog() {
        AlertDialog.Builder alertDialog = new AlertDialog.Builder(this);
        alertDialog.setTitle("GPS 활성화 요청");
        alertDialog.setMessage("현재 GPS가 비활성화 되어있습니다.");
        // Setting Icon to Dialog
        // alertDialog.setIcon(R.drawable.delete);

        // On pressing Settings button
        alertDialog.setPositiveButton("설정",
                new DialogInterface.OnClickListener() {
                    public void onClick(DialogInterface dialog, int which) {
                        Intent intent = new Intent(
                                Settings.ACTION_LOCATION_SOURCE_SETTINGS);
                        startActivity(intent);
                    }
                }
        );
        alertDialog.setNegativeButton("취소",
                new DialogInterface.OnClickListener() {
                    public void onClick(DialogInterface dialog, int which) {
                        dialog.cancel();
                    }
                }
        );
        alertDialog.show();
    }

    @Override
    protected void onResume() {
        super.onResume();
    }

    @Override
    protected void onPause() {
        super.onPause();
    }

    @Override
    protected void onDestroy() {
        super.onDestroy();
        if (thread == null) {

        } else if (thread.getState() == Thread.State.RUNNABLE || thread.getState() == Thread.State.TIMED_WAITING)
            thread.interrupt();
    }

}