我为我的应用程序实现了谷歌地图和谷歌地方。我已经意识到当我第一次安装应用程序时谷歌地图没有正确初始化，即当使用允许通过权限弹出对话框获得谷歌地图权限时，谷歌地图窗口默认为其原始地图而不显示我当前的位置和地方自动填充字段不起作用（意味着谷歌地图没有初始化）。但是，当我第二次和第三次运行应用程序时，它完美运行。
以下是我的代码：
public class MapsActivity extends AppCompatActivity implements
GoogleApiClient.ConnectionCallbacks,
GoogleApiClient.OnConnectionFailedListener,
View.OnClickListener, OnMapReadyCallback,
LocationListener {
protected GoogleApiClient mGoogleApiClient;
private boolean executeOnStart = false;
LocationRequest mLocationRequest;
private static final LatLngBounds BOUNDS_INDIA = new LatLngBounds(
new LatLng(-0, 0), new LatLng(0, 0));
public GoogleMap mMap;
Location mLastLocation;
Marker mCurrLocationMarker;
private String mapAddress = null;
private ImageView imageView;
private Button checkAvailability;
private StringBuilder sb = null;
private EditText mAutocompleteView;
private Geocoder geocoder;
private MarkerOptions markerOptions;
private LatLng latLng;
private Marker marker;
private RecyclerView mRecyclerView;
private LinearLayoutManager mLinearLayoutManager;
private PlacesAutoCompleteAdapter mAutoCompleteAdapter;
PlacesAutoCompleteAdapter.PlaceAutocomplete item;
String featureName, locality, countryName;
String placeId;
ImageView delete;
SupportMapFragment mapFragment;
private boolean allowEditTextChangeListener = true;
private LatLng pos;
static boolean invalidLocation = false;
private LinearLayout linearLayout;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
buildGoogleApiClient();
setContentView(R.layout.activity_search);
mAutocompleteView = (EditText) findViewById(R.id.autocomplete_places);
mapFragment = (SupportMapFragment) getSupportFragmentManager()
.findFragmentById(R.id.map);
mapFragment.getMapAsync(MapsActivity.this);
linearLayout = (LinearLayout) findViewById(R.id.linear_layout);
Log.d("allowEditTextChange1",allowEditTextChangeListener + "");
checkAvailability = (Button) findViewById(R.id.check_availability);
checkAvailability.setTypeface(Display.displayTypeface(getApplicationContext(), 1));
geocoder = new Geocoder(this, Locale.getDefault());
markerOptions = new MarkerOptions();
buildGoogleApiClient();
delete = (ImageView) findViewById(R.id.cross);
mAutoCompleteAdapter = new PlacesAutoCompleteAdapter(this, R.layout.searchview_adapter,
mGoogleApiClient, BOUNDS_INDIA, null);
mRecyclerView = (RecyclerView) findViewById(R.id.recyclerView);
mLinearLayoutManager = new LinearLayoutManager(this);
mRecyclerView.setLayoutManager(mLinearLayoutManager);
mRecyclerView.setAdapter(mAutoCompleteAdapter);
// mRecyclerView.setLayoutFrozen(true);
delete.setOnClickListener(this);
if (allowEditTextChangeListener) {
Log.d("allowEditTextChangz1",allowEditTextChangeListener + "");
mAutocompleteView.addTextChangedListener(new TextWatcher() {
public void onTextChanged(CharSequence s, int start, int before,
int count) {
Log.d("allowEditTextChangz1","jo");
if (!s.toString().equals("") && mGoogleApiClient.isConnected()) {
mAutoCompleteAdapter.getFilter().filter(s.toString());
} else if (!mGoogleApiClient.isConnected()) {
// Toast.makeText(getApplicationContext(), Constants.API_NOT_CONNECTED, Toast.LENGTH_SHORT).show();
Log.e(Constants.PlacesTag, Constants.API_NOT_CONNECTED);
}
}
public void beforeTextChanged(CharSequence s, int start, int count, int after) {}
public void afterTextChanged(Editable s) {}
});
}
mRecyclerView.addOnItemTouchListener(
new RecyclerItemClickListener(this, new RecyclerItemClickListener.OnItemClickListener() {
@Override
public void onItemClick(View view, int position) {
item = mAutoCompleteAdapter.getItem(position);
placeId = String.valueOf(item.placeId);PendingResult<PlaceBuffer> placeResult = Places.GeoDataApi
.getPlaceById(mGoogleApiClient, placeId);
placeResult.setResultCallback(new ResultCallback<PlaceBuffer>() {
@Override
public void onResult(PlaceBuffer places) {
if (places.getCount() == 1) {
mAutoCompleteAdapter.clear();
mAutocompleteView.setText("");
String country = "";
CameraPosition cameraPosition = new CameraPosition.Builder()
.target(places.get(0).getLatLng()) // Sets the center of the map to Mountain View
.zoom(12) // Sets the zoom
.bearing(90) // Sets the orientation of the camera to east
.tilt(30) // Sets the tilt of the camera to 30 degrees
.build(); // Creates a CameraPosition from the builder
marker.remove(); // remove any marker from maponclick or maponlonclick
marker = mMap.addMarker(new MarkerOptions().position(places.get(0).getLatLng())
.title("My Location"));
mMap.setTrafficEnabled(true);
mMap.animateCamera(CameraUpdateFactory.newCameraPosition(cameraPosition));
}
});
Log.i("TAG", "Clicked: " + item.description);
Log.i("TAG", "Called getPlaceById to get Place details for " + item.placeId);
}
})
);
imageView = (ImageView) findViewById(R.id.maps_close);
imageView.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
Log.d("close", "close");
if (mAutoCompleteAdapter.getItemCount() != 0){
mAutoCompleteAdapter.clear();
}
mAutocompleteView.setText("");
}
});
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
checkLocationPermission();
}
}
@Override
public void onMapReady(GoogleMap googleMap) {
mMap = googleMap;
mMap.setMapType(GoogleMap.MAP_TYPE_NORMAL);
if (android.os.Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
if (ContextCompat.checkSelfPermission(this,
Manifest.permission.ACCESS_FINE_LOCATION)
== PackageManager.PERMISSION_GRANTED) {
buildGoogleApiClient();
mMap.setMyLocationEnabled(true);
}
} else {
buildGoogleApiClient();
mMap.setMyLocationEnabled(true);
}
}
@Override
public void onLocationChanged(Location location) {
mLastLocation = location;
if (mCurrLocationMarker != null) {
mCurrLocationMarker.remove();
}
final Double lat = location.getLatitude();
final Double lng = location.getLongitude();
Log.d("LATLANGz", lat + "|" + lng);
latLng = new LatLng(lat, lng);
markerOptions = new MarkerOptions();
markerOptions.position(latLng);
markerOptions.title("Current Positionn");
markerOptions.icon(BitmapDescriptorFactory.defaultMarker(BitmapDescriptorFactory.HUE_MAGENTA));
marker = mMap.addMarker(markerOptions);
mMap.moveCamera(CameraUpdateFactory.newLatLng(latLng));
mMap.animateCamera(CameraUpdateFactory.zoomTo(11));
if (mGoogleApiClient != null) {
LocationServices.FusedLocationApi.removeLocationUpdates(mGoogleApiClient, this);
}
}
protected synchronized void buildGoogleApiClient() {
mGoogleApiClient = new GoogleApiClient.Builder(this)
.addConnectionCallbacks(this)
.addOnConnectionFailedListener(this)
.addApi(LocationServices.API)
.addApi(Places.GEO_DATA_API)
.build();
mGoogleApiClient.connect();
}
@Override
public void onConnectionSuspended(int i) {}
@Override
public void onConnectionFailed(ConnectionResult connectionResult) {}
@Override
public void onClick(View v) {
if(v==delete){
mAutocompleteView.setText("");
}
}
@Override
public void onResume() {
super.onResume();
if (!mGoogleApiClient.isConnected() && !mGoogleApiClient.isConnecting()){
Log.v("Google API","Connecting");
mGoogleApiClient.connect();
}
}
@Override
public void onPause() {
super.onPause();
if(mGoogleApiClient.isConnected()){
Log.v("Google API","Dis-Connecting");
mGoogleApiClient.disconnect();
}
}
@Override
public void onBackPressed() {
super.onBackPressed();
}
public static final int MY_PERMISSIONS_REQUEST_LOCATION = 99;
public boolean checkLocationPermission(){
if (ContextCompat.checkSelfPermission(this,
Manifest.permission.ACCESS_FINE_LOCATION)
!= PackageManager.PERMISSION_GRANTED) {
if (ActivityCompat.shouldShowRequestPermissionRationale(this,
Manifest.permission.ACCESS_FINE_LOCATION)) {
ActivityCompat.requestPermissions(this,
new String[]{Manifest.permission.ACCESS_FINE_LOCATION},
MY_PERMISSIONS_REQUEST_LOCATION);
} else {
ActivityCompat.requestPermissions(this,
new String[]{Manifest.permission.ACCESS_FINE_LOCATION},
MY_PERMISSIONS_REQUEST_LOCATION);
}
return false;
} else {
return true;
}
}
@Override
public void onConnected(Bundle bundle) {
mLocationRequest = new LocationRequest();
mLocationRequest.setInterval(1000);
mLocationRequest.setFastestInterval(1000);
mLocationRequest.setPriority(LocationRequest.PRIORITY_BALANCED_POWER_ACCURACY);
if (mGoogleApiClient.isConnected()){
if (ContextCompat.checkSelfPermission(this,
Manifest.permission.ACCESS_FINE_LOCATION)
== PackageManager.PERMISSION_GRANTED) {
LocationServices.FusedLocationApi.requestLocationUpdates(mGoogleApiClient, mLocationRequest, this);
}
}
}
@Override
public void onRequestPermissionsResult(int requestCode,
String permissions[], int[] grantResults) {
switch (requestCode) {
case MY_PERMISSIONS_REQUEST_LOCATION: {
if (grantResults.length > 0
&& grantResults[0] == PackageManager.PERMISSION_GRANTED) {
if (ContextCompat.checkSelfPermission(this,
Manifest.permission.ACCESS_FINE_LOCATION)
== PackageManager.PERMISSION_GRANTED) {
if (mGoogleApiClient == null) {
buildGoogleApiClient();
}
}
} else {
}
return;
}
}
}
@Override
public void onStart(){
super.onStart();
if (isNetworkAvailable() == true){
if (isLocationEnabled(getApplicationContext())){
if (android.os.Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
checkLocationPermission();
}
// Obtain the SupportMapFragment and get notified when the map is ready to be used.
SupportMapFragment mapFragment = (SupportMapFragment) getSupportFragmentManager()
.findFragmentById(R.id.map);
mapFragment.getMapAsync(this);
} else{
showLocationDialog();
}
} else {
showInternetDialog();
}
}
public void showInternetDialog(){
AlertDialog.Builder builder = new AlertDialog.Builder(this);
builder.setMessage("Please turn on mobile network or Wi-Fi in Settings.")
.setTitle("WIFI Disabled")
.setCancelable(false)
.setPositiveButton("Settings",
new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int id) {
Intent i = new Intent(Settings.ACTION_WIRELESS_SETTINGS);
startActivity(i);
}
}
)
.setNegativeButton("Cancel",
new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int id) {
MapsActivity.this.finish();
}
}
);
AlertDialog alert = builder.create();
alert.show();
}
// check internet connectivity
public boolean isNetworkAvailable() {
ConnectivityManager connectivityManager = (ConnectivityManager) getSystemService(Context.CONNECTIVITY_SERVICE);
NetworkInfo activeNetworkInfo = connectivityManager
.getActiveNetworkInfo();
return activeNetworkInfo != null;
}
public static boolean isLocationEnabled(Context context) {
int locationMode = 0;
String locationProviders;
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT){
try {
locationMode = Settings.Secure.getInt(context.getContentResolver(), Settings.Secure.LOCATION_MODE);
} catch (Settings.SettingNotFoundException e) {
e.printStackTrace();
return false;
}
return locationMode != Settings.Secure.LOCATION_MODE_OFF;
}else{
locationProviders = Settings.Secure.getString(context.getContentResolver(), Settings.Secure.LOCATION_PROVIDERS_ALLOWED);
return !TextUtils.isEmpty(locationProviders);
}
}
public void showLocationDialog(){
executeOnStart = true;
AlertDialog.Builder builder = new AlertDialog.Builder(this);
builder.setMessage(R.string.gps_not_found_message)
.setTitle(R.string.gps_not_found_title)
.setCancelable(false)
.setPositiveButton("Settings",
new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int id) {
Intent i = new Intent(Settings.ACTION_LOCATION_SOURCE_SETTINGS);
startActivity(i);
}
}
)
.setNegativeButton("Cancel",
new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dg, int id) {
MapsActivity.this.finish();
}
}
);
AlertDialog alert = builder.create();
alert.show();
}
}
答案 0 :(得分：1)
也许你没有正确加载它
onRequestPermissionsResult方法。
尝试一些技巧在启动页面活动期间询问权限请求。
答案 1 :(得分：0)
对于当前位置：这是因为onMapReady()你做了：
buildGoogleApiClient();
mMap.setMyLocationEnabled(true);
如果已授予权限，则仅限：
if (mGoogleApiClient == null) {
buildGoogleApiClient();
}
onRequestPermissionsResult()中的。只需将mMap.setMyLocationEnabled(true);添加到onRequestPermissionsResult()即可：
if (mGoogleApiClient == null) {
buildGoogleApiClient();
mMap.setMyLocationEnabled(true);
}
对于自动填充功能：在protected void onCreate(Bundle savedInstanceState)中，您需要先致电buildGoogleApiClient();并创建mAutoCompleteAdapter，然后才能获得许可（首次启动应用时）：
...
buildGoogleApiClient();
delete = (ImageView) findViewById(R.id.cross);
mAutoCompleteAdapter = new PlacesAutoCompleteAdapter(this, R.layout.searchview_adapter, mGoogleApiClient, BOUNDS_INDIA, null);
....
所以，您还应该在mAutoCompleteAdapter = new PlacesAutoCompleteAdapter(...)中致电onRequestPermissionsResult()。