关于Android用户定位获取location值为null的解决方法

在玩一个GPS的东西 获取Location一直为null 后来是从onLocationChanged里面拿location才搞定了 贴一下吧 代码太乱

1. /**
2. *主要是用户定位操作
3. *@author hope
4. */
5. packagecom.jeedroid.tools;
7. importjava.io.IOException;
8. importjava.util.List;
9. importjava.util.Locale;
11. importandroid.content.Context;
12. importandroid.location.Address;
13. importandroid.location.Criteria;
14. importandroid.location.Geocoder;
15. importandroid.location.Location;
16. importandroid.location.LocationListener;
17. importandroid.location.LocationManager;
18. importandroid.os.Bundle;
19. importandroid.provider.Settings;
20. importandroid.util.Log;
22. publicclassLocationTools
23. {
24. privateLocationlocation;
25. publicstaticLocationManagergetLocationManager(Contextcontext)
26. {
27. return(LocationManager)context.getSystemService(context.LOCATION_SERVICE);
28. }
29. //获取位置信息
30. publicStringgetAddress(Contextcontext)
31. {
32. LocationManagerlocationManager=this.getLocationManager(context);
33. if(!locationManager.isProviderEnabled(android.location.LocationManager.GPS_PROVIDER))
34. {
35. //打开GPS需Android2.2以上系统支持
36. android.provider.Settings.Secure.setLocationProviderEnabled(context.getContentResolver(),LocationManager.GPS_PROVIDER,false);
37. }
38. returndoWork(context);
39. }
41. privateStringdoWork(Contextcontext)
42. {
43. Stringaddres="";
44. LocationManagerlocationManager=this.getLocationManager(context);
45. Criteriacriteria=newCriteria();
46. //获得最好的定位效果
47. criteria.setAccuracy(Criteria.ACCURACY_FINE);
48. criteria.setAltitudeRequired(false);
49. criteria.setBearingRequired(false);
50. criteria.setCostAllowed(false);
51. //使用省电模式
52. criteria.setPowerRequirement(Criteria.POWER_LOW);
53. Stringprovider=locationManager.getBestProvider(criteria,true);
54. Log.i("provider>>>>>>",provider);
55. //获得当前位置location为空是一直取从onLocationChanged里面取
56. while(location==null)
57. {
58. location=locationManager.getLastKnownLocation(provider);
59. }
60. //locationListener
61. LocationListenerlocationListener=newLocationListener()
62. {
64. @Override
65. publicvoidonLocationChanged(Locationlocation)
66. {
67. LocationTools.this.location=location;
68. }
70. @Override
71. publicvoidonProviderDisabled(Stringprovider)
72. {
74. }
76. @Override
77. publicvoidonProviderEnabled(Stringprovider)
78. {
80. }
82. @Override
83. publicvoidonStatusChanged(Stringprovider,intstatus,Bundleextras)
84. {
86. }
88. };
89. locationManager.requestLocationUpdates(provider,1000,10,locationListener);
91. Geocodergeo=newGeocoder(context,Locale.getDefault());
92. try
93. {
94. List<Address>address=geo.getFromLocation(location.getLatitude(),location.getLongitude(),1);
95. if(address.size()>0)
96. {
97. addres=address.get(0).getAddressLine(0);
98. }
99. }catch(IOExceptione)
100. {
101. //TODOAuto-generatedcatchblock
102. e.printStackTrace();
103. }
104. returnaddres;
105. }
106. }