1.第一种方法 private void toggleGPS() {              Intent gpsIntent = new Intent();              gpsIntent.setClassName("com.android.settings", "com.android.settings.widget.SettingsAppWidgetProvider");              gpsIntent.addCategory("android.intent.category.ALTERNATIVE");              gpsIntent.setData(Uri.parse("custom:3"));              try {                      PendingIntent.getBroadcast(StartActivity.this, 0, gpsIntent, 0).send();              } catch (CanceledException e) {                      e.printStackTrace();              }      }    2.第二种方法    private void openGPSSettings() {               //获取GPS现在的状态（打开或是关闭状态）     boolean gpsEnabled = Settings.Secure.isLocationProviderEnabled( getContentResolver(), LocationManager.GPS_PROVIDER );         if(gpsEnabled)      {     //关闭GPS       Settings.Secure.setLocationProviderEnabled( getContentResolver(), LocationManager.GPS_PROVIDER, false );      }      else      {       //打开GPS  www.2cto.com       Settings.Secure.setLocationProviderEnabled( getContentResolver(), LocationManager.GPS_PROVIDER, true);     }        3.第三种方法（手动设置）      LocationManager alm = (LocationManager)StartActivity.this.getSystemService(Context.LOCATION_SERVICE);                if (alm.isProviderEnabled(android.location.LocationManager.GPS_PROVIDER))         {                     Toast.makeText(this, "GPS模块正常", Toast.LENGTH_SHORT).show();         }                        Toast.makeText(this, "请开启GPS！", Toast.LENGTH_SHORT).show();         Intent intent = new Intent(Settings.ACTION_SECURITY_SETTINGS);         startActivityForResult(intent,0); //此为设置完成后返回到获取界面          第一第二种需要加上权限   <!--允许程序读取或写入系统设置 -->   <uses-permission android:name="android.permission.WRITE_SETTINGS" ></uses-permission>   <uses-permission android:name="android.permission.WRITE_SECURE_SETTINGS"/>