Android GPS 定位的实现
今天弄了一个多小时,写了一个GPS获取地理位置代码的小例子,包括参考了网上的一些代码,并且对代码进行了一些修改,希望对大家的帮助。具体代码如下:??要实用Adnroid平台的GPS设备,首先需要添加上权限,所以需要添加如下权限:??
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<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION"></uses-permission>
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具体实现代码如下:
首先判断GPS模块是否存在或者是开启:
01 | private ?void ?openGPSSettings() { |
02 | ???????? LocationManager alm = (LocationManager)? this |
03 | ???????????????? .getSystemService(Context.LOCATION_SERVICE); |
05 | ???????????????? .isProviderEnabled(android.location.LocationManager.GPS_PROVIDER)) { |
06 | ???????????? Toast.makeText( this ,? "GPS模块正常" , Toast.LENGTH_SHORT) |
07 | ???????????????????? .show(); |
11 | ???????? Toast.makeText( this ,? "请开启GPS!" , Toast.LENGTH_SHORT).show(); |
12 | ???????? Intent intent =? new ?Intent(Settings.ACTION_SECURITY_SETTINGS); |
13 | ???????? startActivityForResult(intent, 0 );? |
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如果开启正常,则会直接进入到显示页面,如果开启不正常,则会进行到GPS设置页面:
获取代码如下:
01 | private ?void ?getLocation() |
04 | LocationManager locationManager; |
05 | String serviceName = Context.LOCATION_SERVICE; |
06 | locationManager = (LocationManager)? this .getSystemService(serviceName); |
08 | Criteria criteria =? new ?Criteria(); |
09 | criteria.setAccuracy(Criteria.ACCURACY_FINE);? |
10 | criteria.setAltitudeRequired( false ); |
11 | criteria.setBearingRequired( false ); |
12 | criteria.setCostAllowed( true ); |
13 | criteria.setPowerRequirement(Criteria.POWER_LOW);? |
15 | String provider = locationManager.getBestProvider(criteria,? true );? |
16 | Location location = locationManager.getLastKnownLocation(provider);? |
17 | updateToNewLocation(location); |
19 | locationManager.requestLocationUpdates(provider,? 100 ?*? 1000 ,? 500 , |
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到这里就可以获取到地理位置信息了,但是还是要显示出来,那么就用下面的方法进行显示:
01 | private ?void ?updateToNewLocation(Location location) { |
04 | ???????? tv1 = (TextView)? this .findViewById(R.id.tv1); |
05 | ???????? if ?(location !=? null ) { |
06 | ???????????? double ??latitude = location.getLatitude(); |
07 | ???????????? double ?longitude= location.getLongitude(); |
08 | ???????????? tv1.setText( "维度:" ?+? latitude+? "\n经度" ?+ longitude); |
10 | ???????????? tv1.setText( "无法获取地理信息" ); |
这样子就能获取到当前使用者所在的地理位置了,至少如何下地图上实现,在下面将进行获取,并显示出来!对参考代码的人表示感谢!