强制更新多次：Gps位置持续3-6秒。
我的应用需要使用新的当前GPS参数（每3到8秒更新一次）：纬度和经度。我同时使用：GPS提供程序和网络提供程序。
我知道用来更新GPS参数
if(gps_enabled)
lm.requestLocationUpdates(LocationManager.GPS_PROVIDER, 0, 0, locationListenerGps);
if(network_enabled)
lm.requestLocationUpdates(LocationManager.NETWORK_PROVIDER, 0, 0, locationListenerNetwork);
没有找到相关结果
已邀请:
4 个回复
谷靛
try{gps_enabled=lm.isProviderEnabled(LocationManager.GPS_PROVIDER);}catch(Exception ex){} try{network_enabled=lm.isProviderEnabled(LocationManager.NETWORK_PROVIDER);}catch(Exception ex){}原因，我不使用Network_Provider。因为，当2 GPS和Network Provider时，系统将使用NEtwork_provider。但是在日志猫中，我看到智能手机无法使用Network_provider更新“ Listenter”循环3-6s。 启用时，使用GPS_PROVIDER可以3-6秒钟更新智能手机。 -第一次打开GPS;我需要30-50秒才能拥有第一个侦听器。不过还可以肺鬼耙扮群
package Hartford.gps; import java.math.BigDecimal; import android.app.Activity; import android.content.Context; import android.location.Criteria; import android.location.Location; import android.location.LocationListener; import android.location.LocationManager; import android.os.Bundle; import android.widget.TextView; public class GPSMain extends Activity implements LocationListener { LocationManager locationManager; LocationListener locationListener; //text views to display latitude and longitude TextView latituteField; TextView longitudeField; TextView currentSpeedField; TextView kmphSpeedField; TextView avgSpeedField; TextView avgKmphField; //objects to store positional information protected double lat; protected double lon; //objects to store values for current and average speed protected double currentSpeed; protected double kmphSpeed; protected double avgSpeed; protected double avgKmph; protected double totalSpeed; protected double totalKmph; //counter that is incremented every time a new position is received, used to calculate average speed int counter = 0; /** Called when the activity is first created. */ @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); run(); } @Override public void onResume() { locationManager.requestLocationUpdates(LocationManager.GPS_PROVIDER, 0, 1, this); super.onResume(); } @Override public void onPause() { locationManager.removeUpdates(this); super.onPause(); } private void run(){ final Criteria criteria = new Criteria(); criteria.setAccuracy(Criteria.ACCURACY_FINE); criteria.setSpeedRequired(true); criteria.setAltitudeRequired(false); criteria.setBearingRequired(false); criteria.setCostAllowed(true); criteria.setPowerRequirement(Criteria.POWER_LOW); //Acquire a reference to the system Location Manager locationManager = (LocationManager) this.getSystemService(Context.LOCATION_SERVICE); // Define a listener that responds to location updates locationListener = new LocationListener() { public void onLocationChanged(Location newLocation) { counter++; //current speed fo the gps device currentSpeed = round(newLocation.getSpeed(),3,BigDecimal.ROUND_HALF_UP); kmphSpeed = round((currentSpeed*3.6),3,BigDecimal.ROUND_HALF_UP); //all speeds added together totalSpeed = totalSpeed + currentSpeed; totalKmph = totalKmph + kmphSpeed; //calculates average speed avgSpeed = round(totalSpeed/counter,3,BigDecimal.ROUND_HALF_UP); avgKmph = round(totalKmph/counter,3,BigDecimal.ROUND_HALF_UP); //gets position lat = round(((double) (newLocation.getLatitude())),3,BigDecimal.ROUND_HALF_UP); lon = round(((double) (newLocation.getLongitude())),3,BigDecimal.ROUND_HALF_UP); latituteField = (TextView) findViewById(R.id.lat); longitudeField = (TextView) findViewById(R.id.lon); currentSpeedField = (TextView) findViewById(R.id.speed); kmphSpeedField = (TextView) findViewById(R.id.kmph); avgSpeedField = (TextView) findViewById(R.id.avgspeed); avgKmphField = (TextView) findViewById(R.id.avgkmph); latituteField.setText(\"Current Latitude: \"+String.valueOf(lat)); longitudeField.setText(\"Current Longitude: \"+String.valueOf(lon)); currentSpeedField.setText(\"Current Speed (m/s): \"+String.valueOf(currentSpeed)); kmphSpeedField.setText(\"Cuttent Speed (kmph): \"+String.valueOf(kmphSpeed)); avgSpeedField.setText(\"Average Speed (m/s): \"+String.valueOf(avgSpeed)); avgKmphField.setText(\"Average Speed (kmph): \"+String.valueOf(avgKmph)); } //not entirely sure what these do yet public void onStatusChanged(String provider, int status, Bundle extras) {} public void onProviderEnabled(String provider) {} public void onProviderDisabled(String provider) {} }; // Register the listener with the Location Manager to receive location updates locationManager.requestLocationUpdates(LocationManager.GPS_PROVIDER, 0, 1, locationListener); } //Method to round the doubles to a max of 3 decimal places public static double round(double unrounded, int precision, int roundingMode) { BigDecimal bd = new BigDecimal(unrounded); BigDecimal rounded = bd.setScale(precision, roundingMode); return rounded.doubleValue(); } @Override public void onLocationChanged(Location location) { // TODO Auto-generated method stub } @Override public void onProviderDisabled(String provider) { // TODO Auto-generated method stub } @Override public void onProviderEnabled(String provider) { // TODO Auto-generated method stub } @Override public void onStatusChanged(String provider, int status, Bundle extras) { // TODO Auto-generated method stub } }梦砍废么
通知的时间间隔（以毫秒为单位）。该字段仅用作节省电量的提示，位置更新之间的实际时间可能大于或小于此值。通知的最小距离间隔，以米为单位泪琉踞檄
由于：API级别1 注册当前活动以由指定提供者定期通知。定期，将使用当前位置或状态更新来调用提供的LocationListener。 可能需要一段时间才能收到最新位置。如果需要立即定位，则应用程序可以使用getLastKnownLocation（String）方法。 如果用户禁用了提供程序，更新将停止，并且将调用onProviderDisabled（String）方法。再次启用提供程序后，将调用onProviderEnabled（String）方法，并且位置更新将再次开始。 可以使用minTime和minDistance参数控制通知的频率。如果minTime大于0，则LocationManager可能会在两次位置更新之间休息minTime毫秒，以节省电量。如果minDistance大于0，则仅当设备移动minDistance米时，才会广播位置。要尽可能频繁地获取通知，请将两个参数都设置为0。 后台服务在设置足够高的minTime时应格外小心，以使设备始终保持GPS或无线电的开启状态，从而不会消耗太多电能。特别是，建议不要使用60000ms以下的值。 调用线程必须是Looper线程，例如调用Activity的主线程。 参量 提供者要注册的提供者的名称 minTime通知的最小时间间隔（以毫秒为单位）。该字段仅用作节省电量的提示，位置更新之间的实际时间可能大于或小于此值。 minDistance通知的最小距离间隔，以米为单位 侦听器，一个{#link LocationListener}，其onLocationChanged（Location）方法将在每次位置更新时被调用