正在使用一个应用程序，它使用LocationManager和LocationListener来烘烤纬度和经度。在运行应用程序时，出现错误，显示“抱歉，进程系统没有响应”。当我从DDMS下的模拟器控件或使用telnet从命令提示符手动提供lat和long时，会发生这种情况。
Java代码：
public class LocationFinder extends Activity {
private LocationManager locManager;
private LocationListener locListener;
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
locManager = (LocationManager)getSystemService(Context.LOCATION_SERVICE);
locListener = new MyLocationListener();
locManager.requestLocationUpdates(LocationManager.GPS_PROVIDER, 0, 0, locListener);
}
private class MyLocationListener implements LocationListener{
@Override
public void onLocationChanged(Location loc) {
// TODO Auto-generated method stub
if(loc != null){
Toast.makeText(getBaseContext(), "Latitude: " + loc.getLatitude() + "Longitude: " + loc.getLongitude(), Toast.LENGTH_SHORT).show();
}
}
@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
}
}
}
我在manifest.xml中设置了以下权限
<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />
<uses-permission android:name="android.permission.ACCESS_LOCATION" />
<uses-permission android:name="android.permission.ACCESS_GPS" />
<uses-permission android:name="android.permission.ACCESS_ASSISTED_GPS" />
模拟器也启用了hw.gps。
我想知道我的代码是否有任何问题。 感谢
答案 0 :(得分：0)
使用Log检查您是否获得纬度和经度值。
然后在Toast中放这个
Toast.makeText(LocationFinder.this, "Latitude: " + loc.getLatitude() + "Longitude: " + loc.getLongitude(), Toast.LENGTH_SHORT).show();
而不是
Toast.makeText(getBaseContext(), "Latitude: " + loc.getLatitude() + "Longitude: " + loc.getLongitude(), Toast.LENGTH_SHORT).show();
答案 1 :(得分：0)
// Des: Start Device's GPS and get current latitude and longitude
public void GPS() throws IOException {
// Des: This is a background service and called after every 10 minutes and fetch latitude-longitude values
background = new Thread(new Runnable() {
@Override
public void run() {
for (int i = 0; i < j; i++) {
if (ProjectStaticVariable.GPSExit == true ) {
try {
Thread.sleep(600000); //10 minutes
mainhandler.sendMessage(mainhandler.obtainMessage());
j++;
}
catch (Exception e) {
e.printStackTrace();
throw new RuntimeException(e);
}
}
}
}
});
background.start();
mainhandler = new Handler() {
public void handleMessage(Message msg) {
// Check Internet status
isInternetPresent = cd.isConnectingToInternet();
if (isInternetPresent) {
lat_long_Service_flag = true;
mlocManager = (LocationManager) getSystemService(Context.LOCATION_SERVICE);
mlocListener = new MyLocationListener(getApplicationContext());
mlocManager.requestLocationUpdates(LocationManager.GPS_PROVIDER, 60000, 0, mlocListener);
mlocManager = (LocationManager) getSystemService(Context.LOCATION_SERVICE);
}
}
};
}
// Des: Location Listener through which we get current latitude and longitude
public class MyLocationListener implements LocationListener {
public MyLocationListener(Context mContext) {}
public MyLocationListener(Runnable runnable) {}
@Override
public void onLocationChanged(Location loc) {
longitude = loc.getLongitude();
latitude = loc.getLatitude();
final_latitude = Double.toString(latitude);
final_longitude = Double.toString(longitude);
}
@Override
public void onProviderDisabled(String provider) {
}
@Override
public void onProviderEnabled(String provider) {
}
@Override
public void onStatusChanged(String provider, int status, Bundle extras) {
}
}
答案 2 :(得分：0)
它适合我。
再添加1个清单权限：uses-permission android：name =“android.permission.ACCESS_COARSE_LOCATION”
并尝试以下代码段：
public class GPSTracker implements LocationListener{
private final Context mContext;
// flag for GPS status
public boolean isGPSEnabled = false;
// flag for network status
boolean isNetworkEnabled = false;
// flag for GPS status
boolean canGetLocation = false;
Location location; // location
double latitude; // latitude
double longitude; // longitude
// The minimum distance to change Updates in meters
private static final long MIN_DISTANCE_CHANGE_FOR_UPDATES = 1; // 10 meters
// The minimum time between updates in milliseconds
private static final long MIN_TIME_BW_UPDATES = 1; // 1 minute
// Declaring a Location Manager
protected LocationManager locationManager;
public GPSTracker(Context context)
{
this.mContext = context;
getLocation();
}
/**
* Function to get the user's current location
*
* @return
*/
public Location getLocation()
{
try {
locationManager = (LocationManager) mContext.getSystemService(Context.LOCATION_SERVICE);
// getting GPS status
isGPSEnabled = locationManager.isProviderEnabled(LocationManager.GPS_PROVIDER);
Log.v("isGPSEnabled", "=" + isGPSEnabled);
// getting network status
isNetworkEnabled = locationManager.isProviderEnabled(LocationManager.NETWORK_PROVIDER);
Log.v("isNetworkEnabled", "=" + isNetworkEnabled);
if (isGPSEnabled == false && isNetworkEnabled == false)
{
// no network provider is enabled
} else
{
this.canGetLocation = true;
if (isNetworkEnabled)
{
location=null;
locationManager.requestLocationUpdates(LocationManager.NETWORK_PROVIDER,MIN_TIME_BW_UPDATES,MIN_DISTANCE_CHANGE_FOR_UPDATES, this);
Log.d("Network", "Network");
if (locationManager != null)
{
location = locationManager
.getLastKnownLocation(LocationManager.NETWORK_PROVIDER);
if (location != null)
{
latitude = location.getLatitude();
longitude = location.getLongitude();
}
}
}
// if GPS Enabled get lat/long using GPS Services
if (isGPSEnabled)
{
location=null;
if (location == null)
{
locationManager.requestLocationUpdates(LocationManager.GPS_PROVIDER,MIN_TIME_BW_UPDATES,MIN_DISTANCE_CHANGE_FOR_UPDATES, this);
Log.d("GPS Enabled", "GPS Enabled");
if (locationManager != null)
{
location = locationManager
.getLastKnownLocation(LocationManager.GPS_PROVIDER);
if (location != null)
{
latitude = location.getLatitude();
longitude = location.getLongitude();
}
}
}
}
}
} catch (Exception e)
{
e.printStackTrace();
}
return location;
}
/**
* Stop using GPS listener Calling this function will stop using GPS in your
* app
* */
public void stopUsingGPS()
{
if (locationManager != null)
{
locationManager.removeUpdates(GPSTracker.this);
}
}
/**
* Function to get latitude
* */
public double getLatitude()
{
if (location != null)
{
latitude = location.getLatitude();
}
// return latitude
return latitude;
}
/**
* Function to get longitude
* */
public double getLongitude()
{
if (location != null)
{
longitude = location.getLongitude();
}
// return longitude
return longitude;
}
/**
* Function to check GPS/wifi enabled
*
* @return boolean
* */
public boolean canGetLocation()
{
return this.canGetLocation;
}
/**
* Function to show settings alert dialog On pressing Settings button will
* lauch Settings Options
* */
public void showSettingsAlert()
{
AlertDialog.Builder alertDialog = new AlertDialog.Builder(mContext);
// Setting Dialog Title
alertDialog.setTitle("GPS is settings");
// Setting Dialog Message
alertDialog.setMessage("GPS is not enabled. Do you want to go to settings menu?");
// On pressing Settings button
alertDialog.setPositiveButton("Settings",new DialogInterface.OnClickListener()
{
public void onClick(DialogInterface dialog, int which)
{
Intent intent = new Intent(Settings.ACTION_LOCATION_SOURCE_SETTINGS);
mContext.startActivity(intent);
}
});
// on pressing cancel button
alertDialog.setNegativeButton("Cancel",new DialogInterface.OnClickListener()
{
public void onClick(DialogInterface dialog, int which)
{
dialog.cancel();
}
});
// Showing Alert Message
alertDialog.show();
}
@Override
public void onLocationChanged(Location arg0)
{
// TODO Auto-generated method stub
}
@Override
public void onProviderDisabled(String arg0)
{
// TODO Auto-generated method stub
}
@Override
public void onProviderEnabled(String arg0)
{
// TODO Auto-generated method stub
}
@Override
public void onStatusChanged(String arg0, int arg1, Bundle arg2)
{
// TODO Auto-generated method stub
}