我是这里的新用户，我的声誉不足以显示我的应用程序的一些图像以及我的问题，这将使其更加精细，所以很遗憾只是在没有任何应用程序图像的情况下提出问题
我正在使用谷歌nexus 4 ..API 18（安卓版4.3）虚拟设备，并一直在开发这个应用程序，可以在任何具有api 11或11+的Android设备上运行，并在真正的Android设备上测试这个应用程序（三星Galaxy S2 lite）但面临一些问题
1）每当用户在编辑文本框中输入任何位置名称并单击相同活动中的查找按钮时，在下面的地图上绘制标记..它在虚拟设备中每次都能正常工作但在android上此时，当用户点击查找按钮应用程序时，设备会崩溃。
2）在第二个活动中，我在用户点击它时按下了我的位置..它将获得设备的gps坐标并反向对其进行地理编码并在其中一个编辑文本中显示位置地址盒子。这也适用于虚拟设备。花点时间做一切事情，但在真实设备中，它没有显示任何东西，当我点击左上角的图标它显示搜索使用GPS但不显示任何东西为什么这里花了太多时间.. 所以这些是我在Android设备上遇到的两个问题，但这些问题在虚拟设备上完美运行..
plzzz帮助我，我正在研究我的fyp并在这里挂起
问题1的代码如下所示
package com.example.citytourguide;
import java.io.IOException;
import java.util.List;
import com.google.android.gms.maps.CameraUpdateFactory;
import com.google.android.gms.maps.GoogleMap;
import com.google.android.gms.maps.SupportMapFragment;
import com.google.android.gms.maps.model.LatLng;
import com.google.android.gms.maps.model.Marker;
import com.google.android.gms.maps.model.MarkerOptions;
import android.content.Context;
import android.content.Intent;
import android.location.Address;
import android.location.Geocoder;
import android.net.ConnectivityManager;
import android.net.NetworkInfo;
import android.os.AsyncTask;
import android.os.Bundle;
import android.support.v4.app.FragmentActivity;
import android.view.Menu;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.Toast;
public class TourGuide extends FragmentActivity {
GoogleMap googleMap;
Marker mark;
LatLng latLng;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_tour_guide);
SupportMapFragment supportMapFragment = (SupportMapFragment) getSupportFragmentManager().findFragmentById(R.id.map);
googleMap = supportMapFragment.getMap();
Button btn_route=(Button) findViewById(R.id.route);
btn_route.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View arg0) {
// TODO Auto-generated method stub
startActivity(new Intent(getBaseContext(),ShowPath.class));
}
});
// Getting reference to btn_find of the layout activity_main
Button btn_find = (Button) findViewById(R.id.btn_find);
btn_find.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
EditText loc_name = (EditText) findViewById(R.id.editText1);
String location = loc_name.getText().toString();
if(location.equals("")){
Toast.makeText(getBaseContext(), "Please! Enter Something to Find...", Toast.LENGTH_SHORT).show();
}
else{
ConnectivityManager connMgr = (ConnectivityManager) getSystemService(Context.CONNECTIVITY_SERVICE);
NetworkInfo networkInfo = connMgr.getActiveNetworkInfo();
boolean isWiFi = networkInfo.getType() == ConnectivityManager.TYPE_WIFI;
if (isWiFi==true)
{
new GeocoderTask().execute(location);
}
else {
Toast.makeText(getBaseContext(), "Ooops! Error In Network Connection...", Toast.LENGTH_LONG).show();
}
}
}
});
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.tour_guide, menu);
return true;
}
// An AsyncTask class for accessing the GeoCoding Web Service
protected class GeocoderTask extends AsyncTask<String, Void, List<Address>>{
@Override
protected List<Address> doInBackground(String... locationName) {
// Creating an instance of Geocoder classtry
Geocoder geocoder = new Geocoder(getBaseContext());
List<Address> addresses = null;
try {
// Getting a maximum of 3 Address that matches the input text
addresses = geocoder.getFromLocationName(locationName[0], 3);
} catch (IOException e) {
e.printStackTrace();
}
return addresses;
}
@Override
protected void onPostExecute(List<Address> addresses) {
if(addresses==null || addresses.size()==0){
Toast.makeText(getBaseContext(), "No Location found", Toast.LENGTH_SHORT).show();
}
// Clears all the existing markers on the map
googleMap.clear();
// Adding Markers on Google Map for each matching address
for(int i=0;i<addresses.size();i++){
Address address = (Address) addresses.get(i);
// Creating an instance of GeoPoint, to display in Google Map
latLng = new LatLng(address.getLatitude(), address.getLongitude());
String addressText = String.format("%s, %s", address.getMaxAddressLineIndex() > 0 ? address.getAddressLine(0) : "",address.getCountryName());
// Showing the marker on the Map
Marker mark =googleMap.addMarker(new MarkerOptions().position(latLng).title(addressText));
mark.showInfoWindow(); // displaying title on the marker
// Locate the first location
if(i==0)
googleMap.animateCamera(CameraUpdateFactory.newLatLng(latLng));
}
}
}
}
这是我有权访问该位置的文件
package com.example.citytourguide;
import java.io.IOException;
import java.util.List;
import com.google.android.gms.maps.model.LatLng;
import android.location.Address;
import android.location.Criteria;
import android.location.Geocoder;
import android.location.Location;
import android.location.LocationListener;
import android.location.LocationManager;
import android.net.ConnectivityManager;
import android.net.NetworkInfo;
import android.os.AsyncTask;
import android.os.Bundle;
import android.provider.Settings;
import android.app.AlertDialog;
import android.app.Dialog;
import android.content.Context;
import android.content.DialogInterface;
import android.content.Intent;
import android.support.v4.app.FragmentActivity;
import android.util.Log;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.AutoCompleteTextView;
import android.widget.Button;
import android.widget.Toast;
public class ShowPath extends FragmentActivity implements OnClickListener,LocationListener {
AutoCompleteTextView auto_to, auto_from;
Button btn_path, btn_loc;
double lat,lng;
int i = 1 ;
int a = 1 ;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_show_path);
// Getting reference to btn_find of the layout activity_main
auto_from = (AutoCompleteTextView) findViewById(R.id.from);
auto_to = (AutoCompleteTextView) findViewById(R.id.to);
auto_from.setText(null);
auto_to.setText(null);
btn_path=(Button) findViewById(R.id.path);
btn_loc=(Button) findViewById(R.id.btn_loc);
btn_path.setOnClickListener(this);
btn_loc.setOnClickListener(this);
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.show_path, menu);
MenuItem menuitem=menu.add(Menu.NONE,Menu.FIRST,Menu.NONE,"Save");
menuitem.setShowAsAction(MenuItem.SHOW_AS_ACTION_IF_ROOM);
return true;
}
public boolean onMenuItemSelected(int featureId,MenuItem item)
{
Toast.makeText(getBaseContext(),"Map has been concluded from " + " to " , Toast.LENGTH_SHORT).show();
return super.onMenuItemSelected(featureId, item);
}
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
switch(v.getId()){
case R.id.path:
String from=auto_from.getText().toString();
String to = auto_to.getText().toString();
if(to.equals("")&& from.equals("")){
Toast.makeText(getBaseContext(), "Please! Enter Start and Destination properly...", Toast.LENGTH_SHORT).show();
}
else{
ConnectivityManager connMgr = (ConnectivityManager) getSystemService(CONNECTIVITY_SERVICE);
NetworkInfo networkInfo = connMgr.getActiveNetworkInfo();
boolean isWiFi = networkInfo.getType() == ConnectivityManager.TYPE_WIFI;
if (isWiFi==true)
{
Intent in = new Intent(ShowPath.this,ShowMap.class);
in.putExtra("Start", from);
in.putExtra("Dest", to);
startActivity(in);
}
else {
Toast.makeText(getBaseContext(), "Ooops! Error In Network Connection...", Toast.LENGTH_LONG).show();
}
}
break;
case R.id.btn_loc:
// Getting LocationManager object from System Service LOCATION_SERVICE
LocationManager locationManager = (LocationManager) getSystemService(Context.LOCATION_SERVICE);
// Creating a criteria object to retrieve provider
Criteria criteria = new Criteria();
// Getting the name of the best provider
String provider = locationManager.getBestProvider(criteria, true);
Location location = null ;
if(provider.contains("gps"))
{
// Getting Current Location From GPS
if(auto_from.getText().toString().matches("") && (auto_to.getText().toString().matches(""))){
i=0 ;
}
else if (auto_to.getText().toString().matches("")) {
a=0;
}
location = locationManager.getLastKnownLocation(provider);
if(location!=null)
onLocationChanged(location);
}
else
{
showDialog(0);
}
locationManager.requestLocationUpdates(provider, 1000, 0, this);
//locationManager.requestLocationUpdates(provider, 20000, 0, this);
break;
default:
break;
} //switch statement ends
} // on click func ends
@Override
protected Dialog onCreateDialog(int id){
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.";
return new AlertDialog.Builder(this).setMessage(message)
.setTitle("Warning")
.setPositiveButton("Ok", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog,int whichButton)
{
Intent intent = new Intent(Settings.ACTION_LOCATION_SOURCE_SETTINGS);
startActivity(intent);
}
})
.setNegativeButton("Cancel", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog,int whichButton)
{
Toast.makeText(getBaseContext(),
"Gps services still disabled", Toast.LENGTH_SHORT).show();
}
}).create();
}
@Override
public void onLocationChanged(Location location) {
// TODO Auto-generated method stub
lat = location.getLatitude();
lng = location.getLongitude();
LatLng point = new LatLng(lat,lng);
// converting user location to address and assign it to autocomplete text box
new ReverseGeocodingTask(getBaseContext()).execute(point);
}
private class ReverseGeocodingTask extends AsyncTask<LatLng, Void, String>{
Context mContext;
public ReverseGeocodingTask(Context context){
super();
mContext = context;
}
// Finding address using reverse geocoding
@Override
protected String doInBackground(LatLng... params) {
Geocoder geocoder = new Geocoder(mContext);
double latitude = params[0].latitude;
double longitude = params[0].longitude;
List<Address> addresses = null;
String addressText="";
try {
addresses = geocoder.getFromLocation(latitude, longitude,1);
} catch (IOException e) {
e.printStackTrace();
}
if(addresses != null && addresses.size() > 0 ){
Address address = addresses.get(0);
addressText = String.format("%s, %s, %s",
address.getMaxAddressLineIndex() > 0 ? address.getAddressLine(0) : "",
address.getLocality(),
address.getCountryName());
}
return addressText;
}
@Override
protected void onPostExecute(String addressText) {
if(i==0){
auto_from.setText(addressText);
i++ ;
}
else if(a==0){
Log.d("asim","" + a);
auto_to.setText(addressText);
a++;
}
}// post execute finish
}// class reverse geocoding finish
@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
}
}
答案 0 :(得分：0)
在第二项活动中，真实设备需要很长时间才能获取您的位置（2-10分钟），具体取决于您是在露天还是在家中。 仿真器使用DDMS中的Emulater控件获取位置坐标，因此，它不会花费超过几秒钟。尝试在露天测试你的应用程序。