1 public class Main extends Activity implements OnClickListener {  2     private LocationManager locationManager;  3     private Location location;  4     private Criteria criteria;  5     private String provider;  6   7     private TextView tv_Latitude;// 纬度  8     private TextView tv_Longitude;// 经度  9     private TextView tv_High;// 海拔 10     private TextView tv_Direction;// 方向 11     private TextView tv_Speed;// 速度 12     private TextView tv_GpsTime;// 获取的时间 13     private TextView tv_InfoType;// 信息的来源 14     private EditText et_SetTimeSpace;// 设置时间间隔 15  16     private Button manual_btn; 17     private Button settimespace_btn; 18     private Button exit_btn; 19  20     public void onCreate(Bundle savedInstanceState) { 21         super.onCreate(savedInstanceState); 22         setContentView(R.layout.main); 23         setTitle("GPS"); 24         // 隐藏输入法 25         getWindow().setSoftInputMode( 26                 WindowManager.LayoutParams.SOFT_INPUT_STATE_ALWAYS_HIDDEN); 27         initView(); 28         initLocation(); 29     } 30  31     // 初始化 32     @SuppressWarnings("static-access") 33     private void initLocation() { 34         // 初始化locationManager：获得系统所提供的location_service 35         locationManager = (LocationManager) getSystemService(this.LOCATION_SERVICE); 36         /** 37          * LocationManager.GPS_PROVIDER 38          *  39          * 精度比较高，但是慢而且消耗电力， 而且可能因为天气原因或者障碍物而无法获取卫星信息，另外设备可能没有GPS模块； 40          * LocationManager.NETWORK_PROVIDER 41          *  42          * 通过网络获取定位信息，精度低，耗电少，获取信息速度较快，不依赖GPS模块。 43          */ 44         if (locationManager.isProviderEnabled(LocationManager.GPS_PROVIDER)) { 45             /* 注意：criteria有多种设置 */ 46  47             // 第一种：criteria 48             criteria = new Criteria(); 49             criteria.setAccuracy(Criteria.ACCURACY_FINE);// 高精度 50             criteria.setAltitudeRequired(true);// 显示海拔 51             criteria.setBearingRequired(true);// 显示方向 52             criteria.setSpeedRequired(true);// 显示速度 53             criteria.setCostAllowed(false);// 不允许有花费 54             criteria.setPowerRequirement(Criteria.POWER_LOW);// 低功耗 55  56             // 第二种：criteria 57             // criteria = new Criteria(); 58             // criteria.setAccuracy(Criteria.ACCURACY_FINE);//设置为最大精度 59             // criteria.setAltitudeRequired(false);//不要求海拔信息 60             // criteria.setBearingRequired(false);//不要求方位信息 61             // criteria.setCostAllowed(true);//是否允许付费 62             // criteria.setPowerRequirement(Criteria.POWER_LOW);//对电量的要求 63  64             provider = locationManager.getBestProvider(criteria, true); 65  66             locationManager.requestLocationUpdates(provider, 5000, 10, 67                     locationListener);// 位置变化监听,默认5秒一次,距离10米以上 68         } else 69             showInfo(null, -1); 70     } 71  72     /** 73      * 获取GPS相应的数据 74      *  75      * @return 76      */ 77     private GPSModel getLastPosition() { 78         GPSModel gpsModel = new GPSModel(); 79         location = locationManager.getLastKnownLocation(provider); 80         if (location != null) { 81             gpsModel.Latitude = (double) (location.getLatitude()); 82             gpsModel.Longitude = (double) (location.getLongitude()); 83             gpsModel.High = location.getAltitude(); 84             gpsModel.Direct = location.getBearing(); 85             gpsModel.Speed = location.getSpeed(); 86  87             Date d = new Date(); 88             d.setTime(location.getTime()); 89             gpsModel.GpsTime = DateFormat.format("yyyy-MM-dd kk:mm:ss", d) 90                     .toString(); 91             d = null; 92         } 93         return gpsModel; 94     } 95  96     // 显示信息 97     private void showInfo(GPSModel gpsModel, int infotype) { 98         if (gpsModel == null) { 99             if (infotype == -1) {100                 tv_Latitude.setText("GPS功能已关闭");101                 tv_Longitude.setText("");102                 tv_High.setText("");103                 tv_Direction.setText("");104                 tv_Speed.setText("");105                 tv_GpsTime.setText("");106                 tv_InfoType.setText("");107                 manual_btn.setEnabled(false);108                 settimespace_btn.setEnabled(false);109                 et_SetTimeSpace.setEnabled(false);110             }111         } else {112             double y = gpsModel.Latitude;// 纬度113             double x = gpsModel.Longitude;// 经度114             tv_Latitude.setText("纬度：y=" + String.valueOf(y));115             tv_Longitude.setText("经度：x=" + String.valueOf(x));116             tv_High.setText(String.format("海拔:%f", gpsModel.High));117             tv_Direction.setText(String.format("方向:%f", gpsModel.Direct));118             tv_Speed.setText(String.format("速度:%f", gpsModel.Speed));119             tv_GpsTime.setText(String.format("GPS时间:%s", gpsModel.GpsTime));120 121             gpsModel.InfoType = infotype;122             switch (infotype) {123             case 1:124                 tv_InfoType.setText("信息来源状态:手动获取更新");125                 break;126             case 2:127                 tv_InfoType.setText("信息来源状态:位置改变更新");128                 break;129             }130         }131 132     }133 134     @SuppressWarnings("static-access")135     @Override136     public void onClick(View v) {137         if (v.equals(manual_btn)) {138             showInfo(getLastPosition(), 1);139         }140         if (v.equals(settimespace_btn)) {141             if (TextUtils.isEmpty(et_SetTimeSpace.getText().toString())) {142                 Toast.makeText(this, "请输入更新时间间隔", Toast.LENGTH_LONG).show();143                 et_SetTimeSpace.requestFocus();144                 return;145             }146 147             int timespace = Integer.valueOf(et_SetTimeSpace.getText()148                     .toString()) * 1000;149             if (locationManager.isProviderEnabled(locationManager.GPS_PROVIDER))150                 locationManager.requestLocationUpdates(provider, timespace, 10,151                         locationListener);152         }153         if (v.equals(exit_btn))154             android.os.Process.killProcess(android.os.Process.myPid());155     }156 157     private final LocationListener locationListener = new LocationListener() {158 159         @Override160         public void onLocationChanged(Location arg0) {161             showInfo(getLastPosition(), 2);162         }163 164         @Override165         public void onProviderDisabled(String arg0) {166             showInfo(null, -1);167         }168 169         @Override170         public void onProviderEnabled(String arg0) {171         }172 173         @Override174         public void onStatusChanged(String arg0, int arg1, Bundle arg2) {175         }176 177     };178 179     private void initView() {180         tv_Latitude = (TextView) findViewById(R.id.tvlatitude);181         tv_Longitude = (TextView) findViewById(R.id.tvlongitude);182         tv_High = (TextView) findViewById(R.id.tvhigh);183         tv_Direction = (TextView) findViewById(R.id.tvdirection);184         tv_Speed = (TextView) findViewById(R.id.tvspeed);185         tv_GpsTime = (TextView) findViewById(R.id.tvgpstime);186         tv_InfoType = (TextView) findViewById(R.id.tvinfotype);187         et_SetTimeSpace = (EditText) findViewById(R.id.ettimespace);188 189         manual_btn = (Button) findViewById(R.id.btnmanual);190         manual_btn.setOnClickListener(this);191         settimespace_btn = (Button) findViewById(R.id.btnsettimespace);192         settimespace_btn.setOnClickListener(this);193         exit_btn = (Button) findViewById(R.id.btnexit);194         exit_btn.setOnClickListener(this);195     }196 197 }