创建一个使用GPS检索位置的类时遇到问题。我有主要课程和GPStracker课程。我已经尝试了几个示例和代码，我发现它非常简单，调试器抛出了这个错误，它引导我解决问题，我可能会遇到问题吗？
这是对GPStracker类的类调用
package com.gpasport.controlaccesos.controlaccesos;
import android.content.Context;
import android.location.Location;
import android.os.AsyncTask;
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.util.Log;
import android.view.View;
import android.widget.Button;
import android.widget.ListView;
import android.widget.Toast;
import com.squareup.okhttp.OkHttpClient;
import com.squareup.okhttp.Request;
import com.squareup.okhttp.Response;
import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;
import java.io.IOException;
import java.util.Iterator;
import java.util.List;
public class TornosList extends AppCompatActivity {
//vista gps
Button btn;
//vista gps
ListView listView;
//añadido
private static final String Tor = TornosList.class.getSimpleName();
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_tornoslist);
listView = (ListView) findViewById(R.id.mobile_list);
Log.i(Tor,"Estoy en Tornos list");
Bundle extras = getIntent().getExtras();
String url_str = extras.getString("URL");
//adaptamos la url para que quede https://gpasport.miclubonline.net/puertas_club
url_str = url_str.substring(0,34);
url_str = url_str + "puertas_club";
//GPS LOCALIZACION
/*LocationManager locationManager= (LocationManager)getSystemService(Context.LOCATION_SERVICE);
GpsLocation locationListener = new GpsLocation();
locationManager.requestLocationUpdates(LocationManager.GPS_PROVIDER, 0, 0, (LocationListener) locationListener);*/
//FINAL GPS
DownloaddWebPageTask task = new DownloadWebPageTask(TornosList.this ,listView);
task.execute(new String[]{url_str});
btn = (Button)findViewById(R.id.buttonGps);
btn.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
Log.d(Tor,"Entra en click");
GPStracker g = new GPStracker(getApplicationContext());
Log.d(Tor,"Entra en crear gps");
Location l = g.getLocation();
Log.d(Tor,"Entra en en location");
if(l!=null){
double lat = l.getLatitude();
double lon = l.getLongitude();
//Toast toast = Toast.makeText(this, "Codigo verificacion correcto", Toast.LENGTH_LONG);
Toast.makeText(getApplicationContext(),"LAT: "+lat+" \n LON: ",Toast.LENGTH_LONG).show();
}
}
});
}
//Para poder recopilar los datos de las puertas tenemos que utilizar un AsyncTask
private class DownloadWebPageTask extends AsyncTask<String, Void, String> {
Tornos[] aTornos;
ListView lv1;
private Context c;
public DownloadWebPageTask(Context c, ListView lvl){
this.c = c;
this.lv1 = lvl;
}
protected String doInBackground(String... urls) {
try {
//Iniciamos el cliente
OkHttpClient client = new OkHttpClient();
//Creamos la request y la respuesta
Request request =
new Request.Builder()
.url(urls[0])
.build();
Response response;
//Log.i(Tor,"Estoy en response");
//Ejecutamos la request y la guardamos en el objeto response
response = client.newCall(request).execute();
if (response.isSuccessful()) {
return response.body().string();
}
} catch (IOException e) {
e.printStackTrace();
}
return "Download failed";
}
@Override
protected void onPostExecute(String result) {
try {
Log.d(Tor,"Entra en post");
Log.d(Tor,result);
//Instanciamos el JSONhelper
JsonHelper jh = new JsonHelper();
//Creamos un JSONObject con la raspuesta que hemos recivido de la response
JSONObject jsonObject = new JSONObject(result);
//Iniciamos 2 iterators (En principio con uno ya funcionaria)
Iterator keys = jsonObject.keys();
Iterator _key = jsonObject.keys();
//Cuantos elementos hay en el JSONObject para saber la dimension del array de Tornos
int i = 0;
while (_key.hasNext()){
_key.next();
i++;
}
aTornos = new Tornos[i];
int y = 0;
while (keys.hasNext()) {
//Iniciamos un JSONObject por cada key dentro del JSON
JSONObject puertas = jsonObject.getJSONObject(keys.next().toString());
//Creamos un iterator para este segundo Object
Iterator x = puertas.keys();
//Iniciamos el JSONArray que usaremos para pasar de Object a Array
JSONArray jsonArray = new JSONArray();
//Accedemos a los datos del objeto para guradarlo en el array
while (x.hasNext()){
String key = (String) x.next();
jsonArray.put(puertas.get(key));
}
//Usando el JSONhelper transformamos el JSONArray a List
List list = jh.toList(jsonArray);
//Creamos una clase por cada torno que tengamos y lo guardamos en un array de tornos
Tornos t = new Tornos(list.get(0).toString(),list.get(1).toString(),keys.toString(), list.get(2).toString(),list.get(3).toString());
aTornos[y] = t;
y++;
}
//Iniciamos el adapter para el ListView
TornosAdapter adapter = new TornosAdapter (c, R.layout.activity_listview, aTornos);
lv1.setAdapter(adapter);
} catch (JSONException e) {
e.printStackTrace();
}
}
}
}
此代码是您单击按钮时创建新对象的GPStracker类。 Log.d（）没有写入控制台
GPStracker类：
package com.gpasport.controlaccesos.controlaccesos;
import android.content.Context;
import android.location.Location;
import android.location.LocationListener;
import android.location.LocationManager;
import android.os.Bundle;
import android.widget.Toast;
/**
* Created by asanchez on 27/09/2017.
*/
public class GPStracker implements LocationListener{
Context context;
public GPStracker(Context c){
context = c;
}
public Location getLocation(){
LocationManager lm = (LocationManager) context.getSystemService(Context.LOCATION_SERVICE);
boolean isGpsEnabled = lm.isProviderEnabled(LocationManager.GPS_PROVIDER);
if(isGpsEnabled){
lm.requestLocationUpdates(LocationManager.GPS_PROVIDER,6000,10,this);
Location l = lm.getLastKnownLocation(LocationManager.GPS_PROVIDER);
return l;
}else{
Toast.makeText(context, "Please Enable GPS", Toast.LENGTH_SHORT).show();
}
return null;
}
@Override
public void onLocationChanged(Location location) {
}
@Override
public void onStatusChanged(String s, int i, Bundle bundle) {
}
@Override
public void onProviderEnabled(String s) {
}
@Override
public void onProviderDisabled(String s) {
}
}
我的宣言和许可
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.gpasport.controlaccesos.controlaccesos">
<uses-permission android:name="android.permission.CAMERA" />
<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />
<uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION" />
<!-- Needed only if your app targets Android 5.0 (API level 21) or higher. -->
<uses-feature android:name="android.hardware.location.gps" />
<uses-feature android:name="android.hardware.camera" />
<uses-feature android:name="android.hardware.camera.autofocus" />
<application
android:allowBackup="true"
android:icon="@mipmap/ic_launcher"
android:label="@string/app_name"
android:roundIcon="@mipmap/ic_launcher_round"
android:supportsRtl="true"
android:theme="@style/AppTheme">
<activity android:name=".MainActivity">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<activity
android:name=".TornosList"
android:screenOrientation="portrait"></activity>
<activity android:name=".visor"></activity>
<activity
android:name=".GpsLocation"
android:screenOrientation="portrait"></activity>
</application>
</manifest>
该视图包含以下代码：
<?xml version="1.0" encoding="utf-8"?>
<android.support.constraint.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context="com.gpasport.controlaccesos.controlaccesos.TornosList">
<ListView
android:id="@+id/mobile_list"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:divider="@drawable/myrect"
android:dividerHeight="3dp"
tools:layout_editor_absoluteY="267dp"
tools:layout_editor_absoluteX="-16dp" />
<TextView
android:id="@+id/textViewGps"
android:layout_width="775dp"
android:layout_height="99dp"
android:text="TextView"
tools:layout_editor_absoluteX="16dp"
tools:layout_editor_absoluteY="7dp" />
<Button
android:id="@+id/buttonGps"
android:layout_width="508dp"
android:layout_height="68dp"
android:text="Button"
tools:layout_editor_absoluteX="146dp"
tools:layout_editor_absoluteY="125dp" />
</android.support.constraint.ConstraintLayout>
错误debbuger：
09-27 12:11:31.782 21011-21011/com.gpasport.controlaccesos.controlaccesos E/ViewRootImpl: lhf @@ scheduleConsumeBatchedInput: mConsumeBatchedInputScheduled = true,mPendingInputEventHead = null,mTraversalScheduled=true, this = ViewRoot{1736210b com.gpasport.controlaccesos.controlaccesos/com.gpasport.controlaccesos.controlaccesos.TornosList,ident = 2}