Question

我正在研究gpsprovider，如果用户点击基于gps的应用程序来假设地图应用程序，它会检查是否启用了gps提供程序，如果没有警告用户启用gpsprovider。

将有一个广播接收者。将定义从任何应用程序请求服务的消息。如果没有启动，将启动服务。将定义一条消息，说明应用程序不再需要它。如果没有应用程序需要它将停止服务

Answer 1

  String provider = Settings.Secure.getString(getContentResolver(),     Settings.Secure.LOCATION_PROVIDERS_ALLOWED);
    if(provider != null ){      
        if(! provider.contains("gps")){    
            // Notify users and show settings if they want to enable GPS
            new AlertDialog.Builder(MessagePage.this)
            .setMessage("GPS is switched off. enable?")
            .setPositiveButton("Enable GPS", new DialogInterface.OnClickListener(){

                public void onClick(DialogInterface dialog, int which) {
                    // TODO Auto-generated method stub
                    Intent intent = new Intent(Settings.ACTION_LOCATION_SOURCE_SETTINGS);
                    startActivityForResult(intent, 5);
                }
            })
            .setNegativeButton("Don't do it", new DialogInterface.OnClickListener(){

                public void onClick(DialogInterface dialog, int which) {

                }
            })
            .show();
        }
    }

      protected void onActivityResult(int requestCode, int resultCode, Intent data){
       if(requestCode == 5 && resultCode == 0){
           String provider = Settings.Secure.getString(getContentResolver(), Settings.Secure.LOCATION_PROVIDERS_ALLOWED);
           if(provider != null){
               switch(provider.length()){
               case 0:                     
                    //GPS still not enabled..
                   break;
               default:
                   Toast.makeText(this, "GPS is now enabled.", Toast.LENGTH_LONG).show();
                   break;
               }
           }
       }
       else{
           //the user did not enable his GPS
       }
}

Answer 2

AFAIK仍无法以编程方式启动GPS服务。您唯一能做的就是打开设置页面，让用户自行更改设置：

if(!LocationManager.isProviderEnabled(android.location.LocationManager.GPS_PROVIDER )) 
{
    Intent myIntent = new Intent( Settings.ACTION_SECURITY_SETTINGS ); startActivity(myIntent);
}

Answer 3

在您的CommonUtils.java

中

public class CommonUtils {
public static void displayPromptForEnablingGPS(
        final Activity activity)
{
    final AlertDialog.Builder builder =
            new AlertDialog.Builder(activity);
    final String action = Settings.ACTION_LOCATION_SOURCE_SETTINGS;
    final String message = "Enable either GPS or any other location"
            + " service to find current location.  Click OK to go to"
            + " location services settings to let you do so.";

    builder.setMessage(message)
            .setPositiveButton("OK",
                    new DialogInterface.OnClickListener() {
                        public void onClick(DialogInterface d, int id) {
                            activity.startActivity(new Intent(action));
                            d.dismiss();
                        }
                    })
            .setNegativeButton("Cancel",
                    new DialogInterface.OnClickListener() {
                        public void onClick(DialogInterface d, int id) {
                            d.cancel();
                        }
                    });
    builder.create().show();
}

}

在您的活动中

private void getGPSInfo() {

    LocationManager locationmanager = (LocationManager) getActivity()
            .getSystemService(Context.LOCATION_SERVICE);

    if (locationmanager.isProviderEnabled(LocationManager.GPS_PROVIDER)) {
    // YOUR MAPS ACTIVITY CALLING or WHAT YOU NEED

    } else {
        CommonUtils.displayPromptForEnablingGPS(getActivity());
    }
}

如何通知用户启用gpsprovider

3 个答案: