import android.support.v7.app.AppCompatActivity;
import android.view.Menu;
import android.view.MenuInflater;
import android.view.MenuItem;
import android.widget.Toast;
import org.osmdroid.config.Configuration;
import org.osmdroid.util.GeoPoint;
import org.osmdroid.views.MapView;
import org.osmdroid.views.overlay.ItemizedIconOverlay;
import org.osmdroid.views.overlay.OverlayItem;
import java.io.BufferedReader;
import java.io.FileReader;
import java.io.FileWriter;
import java.io.IOException;
import java.io.PrintWriter;
import java.util.ArrayList;
public class MainActivity extends Activity {
MapView mv;
ItemizedIconOverlay<OverlayItem> items;
ItemizedIconOverLay.OnItemGestureListener<OverlayItem> markerGestureListener;
protected void OnCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
LocationManager mgr=(LocationManager)getSystemService(Context.LOCATION_SERVICE);
mgr.reguestLocationUpdates(LocationManager.GPS_PROVIDER,0,0,this);
mv = (MapView) findViewById(R.id.mvID);
mv.setBuiltInZoomControls(true);
mv.getController().setZoom(12);
mv.getController().setCenter(new GeoPoint(50.907703,-1.401472);
items = new ItemizedIconOverlay<OverlayItem>(this, new ArrayList<OverlayItem>(), null);
Configuration.getInstance().load(this, PreferenceManager.getDefaultSharedPreferences(this));
}
public void onLocationChanged(Location newLoc) {
Toast.makeText
(this, "Location=" +
newLoc.getLatitude() + " " +
newLoc.getLongitude(), Toast.LENGTH_LONG).show();
mv.getController().setCenter(new GeoPoint(newLoc.getLatitude(), newLoc.getLongitude()));
}
public void onProviderDisabled(String provider)
{
Toast.makeText(this, "Provider " + provider +
" disabled", Toast.LENGTH_LONG).show();
}
public void onProviderEnabled(String provider)
{
Toast.makeText(this, "Provider " + provider +
" enabled", Toast.LENGTH_LONG).show();
}
public void onStatusChanged(String provider,int status,Bundle extras)
{
Toast.makeText(this, "Status changed: " + status,
Toast.LENGTH_LONG).show();
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
MenuInflater inflater = getMenuInflater();
inflater.inflate(R.menu.menu, menu);
return true;
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
if (item.getItemId() == R.id.newResID){
Intent intent = new Intent (this, AddPlace.class);
startActivityForResult(intent, 0);
return true;
}
if (item.getItemId() == R.id.saveResID){
try {
PrintWriter pw =
new PrintWriter(new FileWriter(Environment.getExternalStorageDirectory().getAbsolutePath() + "/data.csv", true));
for(int i=0; i<items.size(); i++){
OverlayItem itm = items.getItem(i);
pw.println(itm.getTitle()+","+itm.getSnippet()+","+itm.getPoint().getLatitude()+","+itm.getPoint().getLongitude());
}
pw.close();
}
catch (IOException e){
new AlertDialog.Builder(this).setMessage("ERROR Loading:" + e).
setPositiveButton("OK", null).show();
}
}
if (item.getItemId() == R.id.setPrefID){
Intent intent = new Intent (this, PreferencesActivity.class);
startActivityForResult(intent, 1);
return true;
}
if (item.getItemId() == R.id.loadResID){
try
{
BufferedReader reader = new BufferedReader(new FileReader(Environment.getExternalStorageDirectory().getAbsolutePath() + "/data.csv"));
String line;
while((line = reader.readLine()) != null)
{
String[] components = line.split(",");
if(components.length==4)
{
Double lat = Double.valueOf(components[2]).doubleValue();
Double lon = Double.valueOf(components[3]).doubleValue();
OverlayItem itm = new OverlayItem(components[0], components[1], new GeoPoint(lat, lon));
items.addItem(itm);
}
}
}
catch(IOException e)
{
new AlertDialog.Builder(this).setMessage("ERROR Loading:" + e).
setPositiveButton("OK", null).show();
}
return true;
}
return false;
}
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
if (requestCode == 0){
if (resultCode == RESULT_OK){
Bundle extras = data.getExtras();
String name = data.getExtras().getString("com.example.a2colej34.place_name_input");
String address = data.getExtras().getString("com.example.a2colej34.place_type_input");
String cuisine = data.getExtras().getString("com.example.a2colej34.place_price_input");
double lat = mv.getMapCenter().getLatitude();
double lon = mv.getMapCenter().getLongitude();
items = new ItemizedIconOverlay<OverlayItem>(this, new ArrayList<OverlayItem>(),markerGestureListener);
OverlayItem newRestaurant = new OverlayItem(name+ " ", address+" "+cuisine+" ", new GeoPoint(lat,lon));
items.addItem(newRestaurant);
mv.getOverlays().add(items);
SharedPreferences customPrefs = PreferenceManager.getDefaultSharedPreferences(getApplicationContext());
boolean autosave = customPrefs.getBoolean("autosave", true);
if(autosave){
try {
PrintWriter pw =
new PrintWriter(new FileWriter(Environment.getExternalStorageDirectory().getAbsolutePath() + "/data.csv", true));
for(int i=0; i<items.size(); i++){
OverlayItem itm = items.getItem(i);
pw.println(itm.getTitle()+","+itm.getSnippet()+","+itm.getPoint().getLatitude()+","+itm.getPoint().getLongitude());
}
pw.close();
}
catch (IOException e){
new AlertDialog.Builder(this).setMessage("ERROR Loading: " + e).
setPositiveButton("OK", null).show();
}
}
}
}
}
@Override
protected void onStart()
{
super.onStart();
try
{
BufferedReader reader = new BufferedReader(new FileReader(Environment.getExternalStorageDirectory().getAbsolutePath() + "/data.csv"));
String line;
while((line = reader.readLine()) != null)
{
String[] components = line.split(",");
if(components.length==4)
{
Double lat = Double.valueOf(components[2]).doubleValue();
Double lon = Double.valueOf(components[3]).doubleValue();
OverlayItem itm = new OverlayItem(components[0], components[1], new GeoPoint(lat, lon));
items.addItem(itm);
}
}
}
catch(IOException e)
{
new AlertDialog.Builder(this).setMessage("ERROR Loading: " + e).
setPositiveButton("OK", null).show();
}
}
}
我的主要错误似乎来自以下代码行：
答案 0 :(得分：0)
您在“ reguestLocationUpdates”中拼错了请求
此外，ItemizedIconOverlay.OnItemGestureListener是一个接口，而不是一个类。您需要做的是创建自己的实现该接口的类并创建该类的对象。
有关ItemizedIconOverlay的更多信息： https://osmdroid.github.io/osmdroid/javadocAll/org/osmdroid/views/overlay/ItemizedIconOverlay.html
有关OnItemGestureListener的更多信息： https://osmdroid.github.io/osmdroid/javadocAll/org/osmdroid/views/overlay/ItemizedIconOverlay.OnItemGestureListener.html
有关界面的更多信息： https://docs.oracle.com/javase/tutorial/java/concepts/interface.html