2010-08-12 82 views

回答

19

如果你想捕捉按钮按下的位置,这是你怎么做的。如果用户没有启用位置服务,则会将它们发送到设置菜单以启用它。

首先,您必须将权限“android.permission.ACCESS_COARSE_LOCATION”添加到清单中。如果你需要GPS(网络位置是不够敏感),添加许可“android.permission.ACCESS_FINE_LOCATION”代替,并修改“Criteria.ACCURACY_COARSE”到“Criteria.ACCURACY_FINE”

Button gpsButton = (Button)this.findViewById(R.id.buttonGPSLocation); 
gpsButton.setOnClickListener(new OnClickListener() { 

    @Override 
    public void onClick(View v) { 
     // Start loction service 
     LocationManager locationManager = (LocationManager)[OUTERCLASS].this.getSystemService(Context.LOCATION_SERVICE); 

     Criteria locationCritera = new Criteria(); 
     locationCritera.setAccuracy(Criteria.ACCURACY_COARSE); 
     locationCritera.setAltitudeRequired(false); 
     locationCritera.setBearingRequired(false); 
     locationCritera.setCostAllowed(true); 
     locationCritera.setPowerRequirement(Criteria.NO_REQUIREMENT); 

     String providerName = locationManager.getBestProvider(locationCritera, true); 

     if (providerName != null && locationManager.isProviderEnabled(providerName)) { 
      // Provider is enabled 
      locationManager.requestLocationUpdates(providerName, 20000, 100, [OUTERCLASS].this.locationListener); 
     } else { 
      // Provider not enabled, prompt user to enable it 
      Toast.makeText([OUTERCLASS].this, R.string.please_turn_on_gps, Toast.LENGTH_LONG).show(); 
      Intent myIntent = new Intent(Settings.ACTION_LOCATION_SOURCE_SETTINGS); 
      [OUTERCLASS].this.startActivity(myIntent); 
     } 
    } 
}); 

我的外部类有这个听众设置

private final LocationListener locationListener = new LocationListener() { 

    @Override 
    public void onLocationChanged(Location location) { 
     [OUTERCLASS].this.gpsLocationReceived(location); 
    } 

    @Override 
    public void onProviderDisabled(String provider) {} 

    @Override 
    public void onProviderEnabled(String provider) {} 

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

}; 

然后,只要你想停止收听这个电话。您应该至少在您的活动的onStop方法中进行此调用。

LocationManager locationManager = (LocationManager)this.getSystemService(Context.LOCATION_SERVICE); 
locationManager.removeUpdates(this.locationListener); 
+2

上getBestProvider第二个参数(locationCritera,真)检查哪些提供商因此,理论上,您不需要检查它是否再次启用。 – Eduardo 2012-03-29 07:43:21

0

要提示用户启用定位服务,你应该使用包含在谷歌播放服务的新LocationRequest,你可以发现在LocationRequest

2

完整指南通过大量的堆栈溢出的答案会后,我发现这种方法工作得很好,甚至不需要很多代码。
int GPSoff = 0声明为全局变量。
现在,无论你需要检查的GPS和重新定向用户的当前状态打开GPS上,使用此:

try { 
       GPSoff = Settings.Secure.getInt(getContentResolver(),Settings.Secure.LOCATION_MODE); 
      } catch (Settings.SettingNotFoundException e) { 
       e.printStackTrace(); 
      } 
      if (GPSoff == 0) { 
       showMessageOKCancel("You need to turn Location On", 
         new DialogInterface.OnClickListener() { 
          @Override 
          public void onClick(DialogInterface dialog, int which) { 
           Intent onGPS = new Intent(Settings.ACTION_LOCATION_SOURCE_SETTINGS); 
           startActivity(onGPS); 
          } 
         }); 
      } 
+0

什么是getContentResolver(),showMessageOKCancel&startActivity?他们都没有解决 – hfz 2017-05-11 06:50:59

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