嘿伙计^^我做了一个谷歌地图应用程序，使用gps等...它一直很好，直到我重新启动我的手机....每次我尝试启动我的应用程序崩溃：/和我不知道为什么...我认为它不能得到位置或地图不会创造idk但...有人可以帮助我吗？
public class GoogleMapsActivity extends FragmentActivity implements LocationListener, OnMapReadyCallback{
private GoogleMap mMap; // Might be null if Google Play services APK is not available.
private GoogleApiClient mGoogleApiClient;
private LocationRequest myLocationRequest;
public static final String TAG = GoogleMapsActivity.class.getSimpleName();
double latitude2;
double longitude2;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_google_maps);
setUpMapIfNeeded();
// Macht andere GooglePlayServices einfacher zu benutzen
mGoogleApiClient = new GoogleApiClient.Builder(this)
.addApi(LocationServices.API)
.build();
// Baut das LocationRequest objekt
myLocationRequest = LocationRequest.create()
.setPriority(LocationRequest.PRIORITY_HIGH_ACCURACY)
.setInterval(10 * 1000) // 10 seconds, in millisekunden
.setFastestInterval(1 * 1000); // 1 second, in millisekunden
}
@Override
protected void onResume() {
super.onResume();
setUpMapIfNeeded();
}
private void setUpMapIfNeeded() {
// Do a null check to confirm that we have not already instantiated the map.
if (mMap == null) {
// Try to obtain the map from the SupportMapFragment.
mMap = ((SupportMapFragment) getSupportFragmentManager().findFragmentById(R.id.map))
.getMap();
// Check if we were successful in obtaining the map.
if (mMap != null) {
setUpMap();
}
}
}
private void setUpMap() {
}
private void handleNewLocation(Location location) {
/*Marker flora = mMap.addMarker(new MarkerOptions()
.position(florakoords)
.title("Castle")
.alpha(0.7f));
*/
Log.d(TAG, location.toString());
double currentLatitude = location.getLatitude();
double currentLongitude = location.getLongitude();
LatLng latLng = new LatLng(currentLatitude, currentLongitude);
mMap.moveCamera(CameraUpdateFactory.newLatLng(latLng));
double entfernung = vergleicheDistanz(currentLatitude, currentLongitude, latitude2, longitude2);
//Rundet Entfernung
entfernung = Math.round(100.0 * entfernung)/100.0;
String entfernungString = String.valueOf(entfernung);
// flora.setSnippet(entfernungString);
// flora.showInfoWindow();
if (entfernung <= 200.0){
new AlertDialog.Builder(this).setMessage("Noch 200 Meter bis zum Auto!").setNeutralButton("ok",null).show();
}
else {
new AlertDialog.Builder(this).setMessage("Über 200 meter bis zum Auto").setNeutralButton("ok",null).show();
}
}
public static float vergleicheDistanz(double latitude, double longitude, double latitude2, double longitude2) {
Location locationA = new Location("point A");
locationA.setLatitude(latitude);
locationA.setLongitude(longitude);
Location locationB = new Location("point B");
locationB.setLatitude(latitude2);
locationB.setLongitude(longitude2);
float distanz = locationA.distanceTo(locationB);
return distanz;
}
public void getsavedKoords(){
Bundle extras = getIntent().getExtras();
String latitude = extras.getString("latitude");
String longitude = extras.getString("longitude");
double latitude2 = Double.valueOf(latitude);
double longitude2 = Double.valueOf(longitude);
mMap.addMarker(new MarkerOptions().position(new LatLng(latitude2,longitude2)).title("Saved"));
}
@Override
public void onLocationChanged(Location location) {
}
@Override
public void onStatusChanged(String provider, int status, Bundle extras) {
}
@Override
public void onProviderEnabled(String provider) {
}
@Override
public void onProviderDisabled(String provider) {
}
@Override
public void onMapReady(GoogleMap googleMap) {
// Erlaubt google maps meine Location zu nutzen
mMap.setMyLocationEnabled(true);
// Ist dazu da das LocationManager aus getSystemService "importiert" wird wofür LocationManager da ist keine ahnung ...
LocationManager locationManager = (LocationManager)getSystemService(Context.LOCATION_SERVICE);
// Create a criteria object to retrieve provider (Braucht man um später seine Location zu bestimmen)
Criteria criteria = new Criteria();
String provider = locationManager.getBestProvider(criteria, true);
Location location = locationManager.getLastKnownLocation(LocationManager.GPS_PROVIDER);
if (location == null) {
// request location update!!
locationManager.requestLocationUpdates (LocationManager.GPS_PROVIDER,1000, 0, this);
}
else {
double lat = location.getLatitude();
double lon = location.getLongitude();
LatLng latLng = new LatLng(lat,lon);
getsavedKoords();
// Show the current location in Google Map (Zeigt die jetzige Location in einer "animation")
mMap.moveCamera(CameraUpdateFactory.newLatLng(latLng));
// Zoom in the Google Map (Zoomt zu unserer Position, Erschafft danach einen Marker an unserer Position mit der Nachricht "Du bist hier")
mMap.animateCamera(CameraUpdateFactory.zoomTo(14));
// Zoom in the Google Map (Zoomt zu unserer Position, Erschafft danach einen Marker an unserer Position mit der Nachricht "Du bist hier")
mMap.animateCamera(CameraUpdateFactory.zoomTo(14));
}
}
}
我的主要活动
public class MainActivity extends ActionBarActivity {
public String saved = "false";
private Button ParkMyCar;
private Button BringMeBackToMyCar;
private Button DeleteMyCar;
private SharedPreferences preferences;
private SharedPreferences.Editor preferencesEditor;
private static final String SavedKoordsFile = "savedKoords";
private static final int PREFERENCE_MODE_PRIVATE = 0;
private SharedPreferences FilepreferencesSetting;
private SharedPreferences.Editor FilepreferencesEditor;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
ParkMyCar = (Button) findViewById(R.id.ParkMyCar);
ParkMyCar.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View ParkMyCar) {
LocationManager locationManager = (LocationManager) getSystemService(Context.LOCATION_SERVICE);
Criteria criteria = new Criteria();
String provider = locationManager.getBestProvider(criteria, true);
Location myLocation = locationManager.getLastKnownLocation(provider);
double lat = myLocation.getLatitude();
double lon = myLocation.getLongitude();
String savedlatitude = String.valueOf(lat);
String savedlongitude = String.valueOf(lon);
saved = "true";
FilepreferencesSetting = getSharedPreferences(SavedKoordsFile, PREFERENCE_MODE_PRIVATE);
FilepreferencesEditor = FilepreferencesSetting.edit();
// preferencesEditor.putString("latitude",savedlatitude); Schreibt die variable in einen textfile
FilepreferencesEditor.putString("latitude", savedlatitude);
FilepreferencesEditor.putString("longitude", savedlongitude);
FilepreferencesEditor.putString("saved", saved);
//Speichert dad ganze
FilepreferencesEditor.commit();
Intent i = new Intent(MainActivity.this, GoogleMapsActivity.class);
i.putExtra("latitude", savedlatitude);
i.putExtra("longitude", savedlongitude);
startActivity(i);
}
});
BringMeBackToMyCar = (Button) findViewById(R.id.BringMeBackToMyCar);
BringMeBackToMyCar.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
FilepreferencesSetting = getSharedPreferences(SavedKoordsFile, PREFERENCE_MODE_PRIVATE);
String LoadedLat = FilepreferencesSetting.getString("latitude","DEFAULT");
String LoadedLon = FilepreferencesSetting.getString("longitude", "DEFAULT");
String saved = FilepreferencesSetting.getString("saved", "DEFAULT");
if (saved == "true") {
FilepreferencesSetting = getSharedPreferences(SavedKoordsFile, PREFERENCE_MODE_PRIVATE);
FilepreferencesEditor = FilepreferencesSetting.edit();
Toast.makeText(getApplicationContext(), LoadedLat + " " + LoadedLon, Toast.LENGTH_LONG).show();
FilepreferencesEditor.putString("LoadedLat", LoadedLat);
FilepreferencesEditor.putString("LoadedLon", LoadedLon);
FilepreferencesEditor.commit();
Intent i = new Intent(MainActivity.this, LoadedGoogleMaps.class);
i.putExtra("LoadedLat", LoadedLat);
i.putExtra("LoadedLon", LoadedLon);
startActivity(i);
}
else {
Toast.makeText(getApplicationContext(), "Keine Position vorhanden!", Toast.LENGTH_SHORT).show();
}
}
});
DeleteMyCar = (Button)findViewById(R.id.DeleteMyCar);
DeleteMyCar.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
FilepreferencesSetting = getSharedPreferences(SavedKoordsFile, PREFERENCE_MODE_PRIVATE);
FilepreferencesEditor = FilepreferencesSetting.edit();
String saved = FilepreferencesSetting.getString("saved", "DEFAULT");
if (saved == "true") {
FilepreferencesEditor.clear();
FilepreferencesEditor.commit();
Toast.makeText(getApplicationContext(), "Position gelöscht", Toast.LENGTH_SHORT).show();
FilepreferencesSetting = getSharedPreferences(SavedKoordsFile, PREFERENCE_MODE_PRIVATE);
FilepreferencesEditor = FilepreferencesSetting.edit();
saved = "false";
FilepreferencesEditor.putString("saved", saved);
}
else{
Toast.makeText(getApplicationContext(), "Die Position wurde schon gelöscht", Toast.LENGTH_SHORT).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.menu_main, menu);
return true;
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
// Handle action bar item clicks here. The action bar will
// automatically handle clicks on the Home/Up button, so long
// as you specify a parent activity in AndroidManifest.xml.
int id = item.getItemId();
//noinspection SimplifiableIfStatement
if (id == R.id.action_settings) {
return true;
}
return super.onOptionsItemSelected(item);
}
}
答案 0 :(得分：0)
在Manifest中添加以下权限
<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />
<uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION" />
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
<uses-permission android:name="android.permission.CHANGE_NETWORK_STATE" />
<uses-permission android:name="android.permission.ACCESS_WIFI_STATE" />
<uses-permission android:name="android.permission.CHANGE_WIFI_STATE" />