我需要使用NETWORK_PROVIDER获取当前位置,然后单击按钮。如果网络不可用,我想使用GPS_PROVIDER获取位置。我怎样才能做到这一点?使用默认提供程序单击按钮时获取位置
2
A
回答
2
这就是我在做的事情:
MyLocation类:
import android.app.ProgressDialog;
import android.content.Context;
import android.location.Location;
import android.location.LocationListener;
import android.location.LocationManager;
import android.os.AsyncTask;
import android.os.Bundle;
import android.os.Handler;
import android.os.Looper;
public class MyLocation {
// Timer timer1;
LocationManager lm;
LocationResult locationResult;
boolean gps_enabled=false;
boolean network_enabled=false;
AsyncTask<Context, Void, Void> mtask;
public boolean getLocation(Context context, LocationResult result)
{
//I use LocationResult callback class to pass location value from MyLocation to user code.
locationResult=result;
if(lm==null)
lm = (LocationManager) context.getSystemService(Context.LOCATION_SERVICE);
//exceptions will be thrown if provider is not permitted.
try{gps_enabled=lm.isProviderEnabled(LocationManager.GPS_PROVIDER);}catch(Exception ex){}
try{network_enabled=lm.isProviderEnabled(LocationManager.NETWORK_PROVIDER);}catch(Exception ex){}
//don't start listeners if no provider is enabled
if(!gps_enabled && !network_enabled)
return false;
if(gps_enabled)
lm.requestLocationUpdates(LocationManager.GPS_PROVIDER, 0, 0, locationListenerGps);
if(network_enabled)
lm.requestLocationUpdates(LocationManager.NETWORK_PROVIDER, 0, 0, locationListenerNetwork);
// timer1=new Timer();
// timer1.schedule(new GetLastLocation(), 20000);
mtask= new GetLastLocation().execute();
return true;
}
LocationListener locationListenerGps = new LocationListener() {
public void onLocationChanged(Location location) {
// timer1.cancel();
mtask.cancel(true);
locationResult.gotLocation(location);
lm.removeUpdates(this);
lm.removeUpdates(locationListenerNetwork);
}
public void onProviderDisabled(String provider) {}
public void onProviderEnabled(String provider) {}
public void onStatusChanged(String provider, int status, Bundle extras) {}
};
LocationListener locationListenerNetwork = new LocationListener() {
public void onLocationChanged(Location location) {
mtask.cancel(true);
locationResult.gotLocation(location);
lm.removeUpdates(this);
lm.removeUpdates(locationListenerGps);
}
public void onProviderDisabled(String provider) {}
public void onProviderEnabled(String provider) {}
public void onStatusChanged(String provider, int status, Bundle extras) {}
};
private Context mContext;
public MyLocation(Context c) { this.mContext = c; }
class GetLastLocation extends AsyncTask<Context, Void, Void>
{
ProgressDialog dialog = new ProgressDialog(mContext);
protected void onPreExecute()
{
dialog.setMessage("Searching....");
dialog.show();
}
protected Void doInBackground(Context... params)
{
Handler mHandler = new Handler(Looper.getMainLooper());
// ...
mHandler.post(new Runnable() {
public void run() {
lm.removeUpdates(locationListenerGps);
lm.removeUpdates(locationListenerNetwork);
Location net_loc=null, gps_loc=null;
if(gps_enabled)
gps_loc=lm.getLastKnownLocation(LocationManager.GPS_PROVIDER);
if(network_enabled)
net_loc=lm.getLastKnownLocation(LocationManager.NETWORK_PROVIDER);
//if there are both values use the latest one
if(gps_loc!=null && net_loc!=null){
if(gps_loc.getTime()>net_loc.getTime())
locationResult.gotLocation(gps_loc);
else
locationResult.gotLocation(net_loc);
return;
}
if(gps_loc!=null){
locationResult.gotLocation(gps_loc);
return;
}
if(net_loc!=null){
locationResult.gotLocation(net_loc);
return;
}
locationResult.gotLocation(null);
}
});
// ...
return null;
}
protected void onPostExecute(final Void unused)
{
dialog.dismiss();
}
}
public static abstract class LocationResult{
public abstract void gotLocation(Location location);
}
}
和按钮点击的方法:
MyLocation myLocation = new MyLocation();
private void locationClick() {
myLocation.getLocation(this, locationResult));
}
public LocationResult locationResult = new LocationResult(){
@Override
public void gotLocation(final Location location){
//Got the location!
});
}
};
我已经在计算器的旧后发现这个的时候我一直在寻找类似问题的解决方案.... ..
1
你必须使用此方法来检查所有能够提供
void requestLocationUpdates()
{
locationManager = (LocationManager)getSystemService(Context.LOCATION_SERVICE);
List<String> enabledProviders = this.locationManager.getProviders(true);
for (String provider:enabledProviders){
Log.i(">>>>>>>", "Requesting location updates from provider " + provider);
this.locationManager.requestLocationUpdates(provider, 10000l, 10, this);
}
}
0
LocationManager locMgr = (LocationManager) this.getSystemService(Context.LOCATION_SERVICE);
LocationListener locListner = new LocationListener() {
public void onProviderEnabled(String provider) {
}
public void onProviderDisabled(String provider) {
}
public void onLocationChanged(Location location) {
// CODE TO READ LOCATION
}
public void onStatusChanged(String provider, int status,
Bundle extras) {
// TODO Auto-generated method stub
}
};
// ON Click of button do this request.
locMgr.requestLocationUpdates(LocationManager.NETWORK_PROVIDER, 0, 0, locListner);
而且你需要在你的清单文件
<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION"/>
权限添加更多细节请参考Developer Guide
相关问题
- 1. 使用熔合位置提供程序获取位置
- 2. 当单击取消按钮时禁用验证错误提供程序
- 3. 尝试获取地理位置时找不到提供程序
- 4. 单击按钮时请求GPS位置
- 5. 默认提交按钮样式表单
- 6. 单击按钮时获取“href”信息
- 7. 单击按钮时从GridView获取值
- 8. 单击按钮时从td获取值。
- 9. JQuery在gridview中获取单击按钮的位置
- 10. 如何在单击按钮上获取GPS位置?
- 11. 单击按钮时无法获取单选按钮值
- 12. 单击按钮时获取所选单选按钮的编号
- 13. 设置默认“ok”和“取消”按钮
- 14. 获取默认程序
- 15. 点击按钮时获取当前位置
- 16. Android按钮点击时获取列表项的位置
- 17. 点击按钮后将下拉菜单重置为默认值
- 18. 按钮获取错误点击获取位置
- 19. 使用网络位置提供程序进行多次读取
- 20. Extjs按钮点击默认调用menuitem
- 21. 单击提交按钮时引用单选按钮的值jsp
- 22. 默认按钮设置
- 23. 如何设置HTML表单中的默认提交按钮?
- 24. 单击主页按钮时的Android默认屏幕
- 25. 用google地图上的按钮点击获取用户位置
- 26. 使用javascript单击编辑按钮时获取GridRow值
- 27. Android:单击按钮时如何从按钮中获取文本?
- 28. 如何在应用程序开始后立即获取我的位置,而无需单击单选按钮
- 29. 单选按钮确认,同时单击“继续”按钮的Javascript
- 30. 使用单选按钮在ChoiceType中设置默认数据