GPS技术（二）

 1 //邻近警告
 2 public class MainActivity extends ActionBarActivity {
 3 
 4     @Override
 5     protected void onCreate(Bundle savedInstanceState) {
 6         super.onCreate(savedInstanceState);
 7         setContentView(R.layout.fragment_main);
 8         LocationManager lManager = (LocationManager) getSystemService(Context.LOCATION_SERVICE);
 9         double longitude = 123.427109;
10         double latitude = 41.764998;
11         float radius = 2000;
12         Intent intent = new Intent(this, PromimityAlterRecivery.class);
13         PendingIntent pendingIntent = PendingIntent.getBroadcast(this, 1,
14                 intent, 0);
15         lManager.addProximityAlert(latitude, longitude, radius, -1,
16                 pendingIntent);
17 
18     }
19 
20 }

 1 public class PromimityAlterRecivery extends BroadcastReceiver {
 2 
 3     @Override
 4     public void onReceive(Context context, Intent intent) {
 5         // 获取是否进入的指定区域
 6         boolean isEnter = intent.getBooleanExtra(
 7                 LocationManager.KEY_PROXIMITY_ENTERING, false);
 8         if (isEnter) {
 9             Toast.makeText(context, "你已经进入指定区域", 0).show();
10         } else {
11             Toast.makeText(context, "你已经进入指定区域然后出去了", 0).show();
12         }
13     }
14 }

 1 //根据经纬度测两点之间的距离
 2 public class MainActivity extends ActionBarActivity {
 3     EditText mEditText;
 4 
 5     @Override
 6     protected void onCreate(Bundle savedInstanceState) {
 7         super.onCreate(savedInstanceState);
 8         setContentView(R.layout.fragment_main);
 9         mEditText = (EditText) findViewById(R.id.editText1);
10         final float[] result = new float[3];
11         Location.distanceBetween(20.123, 30.05644, 30.124, 40.543, result);
12         mEditText.setText(String.valueOf(result[0] + "米"));
13 
14     }
15 
16 }

 1 //实时获取GPS定位数据
 2 public class MainActivity extends ActionBarActivity {
 3     LocationManager mlManager;
 4     EditText mEditText;
 5 
 6     @Override
 7     protected void onCreate(Bundle savedInstanceState) {
 8         super.onCreate(savedInstanceState);
 9         setContentView(R.layout.fragment_main);
10         mEditText = (EditText) findViewById(R.id.editText1);
11         mlManager = (LocationManager) getSystemService(Context.LOCATION_SERVICE);
12         // 从GPS获取最近的定位信息
13         Location location = mlManager
14                 .getLastKnownLocation(LocationManager.GPS_PROVIDER);
15 
16         undateView(location);
17         mlManager.requestLocationUpdates(LocationManager.GPS_PROVIDER, 2000, 8,
18                 new LocationListener() {
19 
20                     @Override
21                     public void onStatusChanged(String provider, int status,
22                             Bundle extras) {
23                         // TODO Auto-generated method stub
24 
25                     }
26 
27                     @Override
28                     public void onProviderEnabled(String provider) {
29                         // 当GPSlocationProvider可用时，更新位置
30 
31                         undateView(mlManager.getLastKnownLocation(provider));
32 
33                     }
34 
35                     @Override
36                     public void onProviderDisabled(String provider) {
37                         // TODO Auto-generated method stub
38 
39                     }
40 
41                     @Override
42                     public void onLocationChanged(Location location) {
43                         // 当GPS位置信息发生变化，更新位置
44                         undateView(location);
45 
46                     }
47                 });
48 
49     }
50 
51     // 用来更新EditText中的信息
52     private void undateView(Location newlocation) {
53         // TODO Auto-generated method stub
54         if (newlocation != null) {
55             StringBuilder sBuilder = new StringBuilder();
56             sBuilder.append("实时的位置信息：\n");
57             sBuilder.append("\n经度");
58             sBuilder.append(newlocation.getLongitude());
59             sBuilder.append("\n纬度");
60             sBuilder.append(newlocation.getLatitude());
61             sBuilder.append("\n高度");
62             sBuilder.append(newlocation.getAltitude());
63             sBuilder.append("\n速度");
64             sBuilder.append(newlocation.getSpeed());
65             sBuilder.append("\n方向");
66             sBuilder.append(newlocation.getBearing());
67             mEditText.setText(sBuilder.toString());
68         }
69     }
70 
71 }