我对Android Studio来说还很陌生，因此为菜鸟的错误道歉。我正在使用Google Map SDK制作一个Android应用程序，并希望使用RecyclerView保存旧的搜索，一旦单击旧的保存位置，它将放大到该位置。但是，我在editText框中的输入没有保存到RecyclerView中。
编辑：显然，使用ListView是完成此任务的简便方法，我从未使用过
这是我的主班：
public class MapsActivity extends AppCompatActivity
implements OnMapReadyCallback,
GoogleApiClient.ConnectionCallbacks,
GoogleApiClient.OnConnectionFailedListener,
LocationListener
{
public static final int MY_PERMISSIONS_REQUEST_LOCATION = 99;
GoogleMap mGoogleMap;
SupportMapFragment mapFrag;
LocationRequest mLocationRequest;
GoogleApiClient mGoogleApiClient;
Location mLastLocation;
Marker mCurrLocationMarker;
EditText editText;
Button searchLocation;
Geocoder geocoder;
List<Address> addresses = new ArrayList<>();
double lat, lng;
//ArrayList<Address> address;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_maps);
editText = findViewById(R.id.editText);
searchLocation = findViewById(R.id.searchLocation);
RecyclerView recycler_view = (RecyclerView) findViewById(R.id.recycler_view) ;
MyAdapter myAdapter = new MyAdapter((ArrayList<Address>) addresses);
recycler_view.setAdapter(myAdapter);
mapFrag = (SupportMapFragment) getSupportFragmentManager().findFragmentById(R.id.map);
mapFrag.getMapAsync(this);
geocoder = new Geocoder(this, Locale.getDefault());
}
@Override
public void onMapReady(GoogleMap googleMap) {
mGoogleMap = googleMap;
mGoogleMap.setMapType(GoogleMap.MAP_TYPE_NORMAL);
//Initialize Google Play Services
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M)
{
if (ContextCompat.checkSelfPermission(this,
android.Manifest.permission.ACCESS_FINE_LOCATION)
== PackageManager.PERMISSION_GRANTED) {
buildGoogleApiClient();
mGoogleMap.setMyLocationEnabled(true); }
} else {
buildGoogleApiClient();
mGoogleMap.setMyLocationEnabled(true);
}
searchLocation.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
try {
addresses = geocoder.getFromLocationName(editText.getText().toString(), 1);
} catch (IOException e) {
e.printStackTrace();
}
if (addresses.size()>0) {
Address address = addresses.get(0);
LatLng latLng = new LatLng(address.getLatitude(), address.getLongitude());
mGoogleMap.addMarker(new MarkerOptions().position(latLng).title(String.valueOf(searchLocation)));
mGoogleMap.animateCamera(CameraUpdateFactory.newLatLngZoom(latLng, 15));
}
else{
Toast.makeText(getApplicationContext(),"Invalid Address!",Toast.LENGTH_SHORT).show();
}
}
});
}
protected synchronized void buildGoogleApiClient()
{
mGoogleApiClient = new GoogleApiClient.Builder(this)
.addConnectionCallbacks(this)
.addOnConnectionFailedListener(this)
.addApi(LocationServices.API)
.build();
mGoogleApiClient.connect();
}
@Override
public void onConnected(Bundle bundle) {
mLocationRequest = new LocationRequest();
mLocationRequest.setInterval(1000);
mLocationRequest.setFastestInterval(1000);
mLocationRequest.setPriority(LocationRequest.PRIORITY_BALANCED_POWER_ACCURACY);
if (ContextCompat.checkSelfPermission(this,
android.Manifest.permission.ACCESS_FINE_LOCATION)
== PackageManager.PERMISSION_GRANTED) {
LocationServices.FusedLocationApi.requestLocationUpdates(mGoogleApiClient, mLocationRequest, this);}
}
@Override
public void onConnectionSuspended(int i) {
}
@Override
public void onConnectionFailed(ConnectionResult connectionResult) {
}
@Override
public void onLocationChanged(Location location) {
mLastLocation = location;
if (mCurrLocationMarker != null) {
mCurrLocationMarker.remove();
}
}
}
这是我的适配器类：
public class MyAdapter extends RecyclerView.Adapter<MyAdapter.MyViewHolder> {
private ArrayList<MarkerOptions> markerList;
private LayoutInflater mInflater;
private static itemClickListener listener; //Listener object, using the interface
public MyAdapter(ArrayList<Address> addresses) {
}
//Create an interface used for creating a click listener
//Reference: https://stackoverflow.com/questions/24471109/recyclerview-onclick/26196831#26196831
public interface itemClickListener{
public void onItemClick(View v, int pos);
}
//Provides a reference to the views for each data item - View holder
public static class MyViewHolder extends RecyclerView.ViewHolder {
public TextView editText;
public MyViewHolder(@NonNull View itemView) {
super(itemView);
editText = itemView.findViewById(R.id.editText);
//Override the click listener for listening to each click on the root view of the item(main activity)
itemView.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
//Acquires the position of the click on the root view
int position = MyViewHolder.super.getAdapterPosition();
//Trigger callback
listener.onItemClick(v, position);
}
});
}
}
//Adapter Constructor
public MyAdapter(Context context, ArrayList<MarkerOptions> input, itemClickListener listen){
mInflater = LayoutInflater.from(context);
markerList = input;
listener = listen;
}
//Create new views, invoked by layout manager
@NonNull
@Override
public MyViewHolder onCreateViewHolder(@NonNull ViewGroup parent, int viewType) {
//Create new view
View v = mInflater.inflate(R.layout.history_locations, parent,
false);
return new MyViewHolder(v);
}
//Replaces the content of a view, invoked by layout manager
@Override
public void onBindViewHolder(@NonNull MyViewHolder holder, final int position) {
String tempTitle = markerList.get(position).getTitle();
holder.editText.setText(tempTitle);
}
@Override
public int getItemCount() {
return markerList.size();
}
}
和我的XML文件
<RelativeLayout
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=".MapsActivity">
<fragment
xmlns:map="http://schemas.android.com/apk/res-auto"
android:id="@+id/map"
android:name="com.google.android.gms.maps.SupportMapFragment"
android:layout_width="match_parent"
android:layout_height="match_parent" />
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="horizontal">
<EditText
android:layout_width="248dp"
android:layout_height="wrap_content"
android:id="@+id/editText"
android:layout_weight="0.5"
android:inputType="textPersonName"
android:hint="Search Location" />
<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_weight="0.5"
android:id="@+id/searchLocation"
android:text="Search" />
</LinearLayout>
<androidx.recyclerview.widget.RecyclerView
android:id="@+id/recycler_view"
android:layout_width="match_parent"
android:layout_height="160dp"
android:layout_alignParentBottom="true"
android:background="@android:color/background_light"/>
</RelativeLayout>
在您的adapter：
public MyAdapter(ArrayList<Address> addresses) {
//add this
this. markerList = addresses;
}
在MapsActivity
移动这些行：
MyAdapter myAdapter = new MyAdapter((ArrayList<Address>) addresses);
recycler_view.setAdapter(myAdapter);
//在您的点击监听器中
........
try {
addresses = geocoder.getFromLocationName(editText.getText().toString(), 1);
//here
MyAdapter myAdapter = new MyAdapter((ArrayList<Address>) addresses);
recycler_view.setAdapter(myAdapter);
} catch (IOException e) {
e.printStackTrace();
}
......
.......