如何使用提示對話框在google maps api v2中搜索地址？

Question

我做了一個AlertDialog與EditText，我希望當用戶點擊'Buscar'（positiveButton）時，地圖在AlertDialog上輸入的地址中顯示Marker。所以我認爲我需要將數據從這個EditText傳遞到MapFragment，以便將Geocoder與這些數據一起使用。

這裏是我的mainActivity.java與AlertDialog：

package com.example.alex.testing_map; 

import android.content.DialogInterface; 
import android.content.Intent; 
import android.net.Uri; 
import android.os.Bundle; 
import android.support.design.widget.NavigationView; 
import android.support.v4.app.Fragment; 
import android.support.v4.app.FragmentTransaction; 
import android.support.v4.view.GravityCompat; 
import android.support.v4.widget.DrawerLayout; 
import android.support.v7.app.ActionBarDrawerToggle; 
import android.support.v7.app.AlertDialog; 
import android.support.v7.app.AppCompatActivity; 
import android.support.v7.widget.Toolbar; 
import android.text.InputType; 
import android.view.Menu; 
import android.view.MenuItem; 
import android.widget.EditText; 


public class MapsActivity extends AppCompatActivity 
    implements NavigationView.OnNavigationItemSelectedListener { 

private String location = ""; 

@Override 
protected void onCreate(Bundle savedInstanceState) { 
    super.onCreate(savedInstanceState); 
    setContentView(R.layout.activity_maps); 
    Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar); 
    setSupportActionBar(toolbar); 

    DrawerLayout drawerLayout = (DrawerLayout) findViewById(R.id.drawer_layout); 
    ActionBarDrawerToggle drawerToggle = new ActionBarDrawerToggle(
      this, drawerLayout, toolbar, R.string.openDrawer, R.string.closeDrawer); 

    drawerLayout.setDrawerListener(drawerToggle); 
    drawerToggle.syncState(); 

    Fragment fragment = new MapFragment(); 
    FragmentTransaction ft = getSupportFragmentManager().beginTransaction(); 
    ft.add(R.id.frame_content, fragment); 
    ft.commit(); 

    NavigationView navigationView = (NavigationView) findViewById(R.id.nav_view); 
    navigationView.setNavigationItemSelectedListener(this); 
} 

@Override 
public void onBackPressed() { 
    DrawerLayout drawerLayout = (DrawerLayout) findViewById(R.id.drawer_layout); 
    if (drawerLayout.isDrawerOpen(GravityCompat.START)) { 
     drawerLayout.closeDrawer(GravityCompat.START); 
    } else { 
     super.onBackPressed(); 
    } 
} 

@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){ 

    switch (item.getItemId()){ 
     case R.id.add_item: 
      Intent intent = new Intent(this, AddMail.class); 
      this.startActivity(intent); 
      break; 
     case R.id.search: 
      AlertDialog.Builder builder = new AlertDialog.Builder(this); 
      builder.setTitle("Dirección"); 

      final EditText input = new EditText(this); 
      input.setInputType(InputType.TYPE_CLASS_TEXT); 
      builder.setView(input); 

      builder.setPositiveButton("Buscar", new DialogInterface.OnClickListener() { 
       @Override 
       public void onClick(DialogInterface dialog, int which) { 
        location = input.getText().toString(); 

       } 
      }); 
      builder.setNegativeButton("Cancelar", new DialogInterface.OnClickListener() { 
       @Override 
       public void onClick(DialogInterface dialog, int which) { 
        dialog.cancel(); 
       } 
      }); 

      builder.show(); 
      break; 
     default: 
      return super.onOptionsItemSelected(item); 
    } 

    return true; 

} 


@SuppressWarnings("StatementWithEmptyBody") 
@Override 
public boolean onNavigationItemSelected(MenuItem item) { 

    Fragment fragment = null; 

    switch (item.getItemId()){ 
     case R.id.mapa: 
      fragment = new MapFragment(); 
      FragmentTransaction ft1 = getSupportFragmentManager().beginTransaction(); 
      ft1.replace(R.id.frame_content, fragment); 
      ft1.commit(); 
      getSupportActionBar().setTitle(R.string.app_name); 
      break; 
     case R.id.help: 
      fragment = new Help(); 
      FragmentTransaction ft2 = getSupportFragmentManager().beginTransaction(); 
      ft2.replace(R.id.frame_content, fragment); 
      ft2.commit(); 
      getSupportActionBar().setTitle(item.getTitle()); 
      break; 
     case R.id.about: 
      fragment = new About(); 
      FragmentTransaction ft3 = getSupportFragmentManager().beginTransaction(); 
      ft3.replace(R.id.frame_content, fragment); 
      ft3.commit(); 
      getSupportActionBar().setTitle(item.getTitle()); 
      break; 
     case R.id.rate: 
      Intent face = new Intent(Intent.ACTION_VIEW); 
      face.setData(Uri.parse("fb://profile/" + "100000914715145")); 
      startActivity(face); 
      break; 
     default: 
      return true; 

    } 


    DrawerLayout drawerLayout = (DrawerLayout)findViewById(R.id.drawer_layout); 
    drawerLayout.closeDrawer(GravityCompat.START); 
    return true; 
} 


} 

而且我MapFragment.java：

package com.example.alex.testing_map; 

import android.Manifest; 
import android.content.Context; 
import android.content.pm.PackageManager; 
import android.location.Criteria; 
import android.location.Location; 
import android.location.LocationManager; 
import android.os.Bundle; 
import android.support.v4.app.Fragment; 
import android.support.v4.app.FragmentManager; 
import android.support.v4.app.FragmentTransaction; 
import android.support.v4.content.ContextCompat; 
import android.view.LayoutInflater; 
import android.view.View; 
import android.view.ViewGroup; 


import com.google.android.gms.maps.CameraUpdateFactory; 
import com.google.android.gms.maps.GoogleMap; 
import com.google.android.gms.maps.OnMapReadyCallback; 
import com.google.android.gms.maps.SupportMapFragment; 
import com.google.android.gms.maps.model.BitmapDescriptorFactory; 
import com.google.android.gms.maps.model.LatLng; 
import com.google.android.gms.maps.model.MarkerOptions; 



public class MapFragment extends Fragment implements OnMapReadyCallback { 


private GoogleMap mMap; 

@Override 
public View onCreateView(LayoutInflater inflater, ViewGroup viewGroup, Bundle savedInstanceState) { 
    View view = inflater.inflate(R.layout.map_fragment, viewGroup, false); 
    FragmentManager manager = getFragmentManager(); 
    FragmentTransaction transaction = manager.beginTransaction(); 
    SupportMapFragment fragment = new SupportMapFragment(); 
    transaction.replace(R.id.mapView, fragment); 
    transaction.commit(); 

    fragment.getMapAsync(this); 
    return view; 
} 


@Override 
public void onMapReady(GoogleMap googleMap) { 
    mMap = googleMap; 
    if (ContextCompat.checkSelfPermission(getContext(), Manifest.permission.ACCESS_FINE_LOCATION) 
      == PackageManager.PERMISSION_GRANTED) { 
     mMap.setMyLocationEnabled(true); 
    } else { 
     if (ContextCompat.checkSelfPermission(getContext(), Manifest.permission.ACCESS_COARSE_LOCATION) 
       == PackageManager.PERMISSION_GRANTED) { 
      mMap.setMyLocationEnabled(true); 

     } else { 
     } 
    } 

    mMap.getUiSettings().setCompassEnabled(false); 
    mMap.getUiSettings().setIndoorLevelPickerEnabled(false); 
    mMap.getUiSettings().setMapToolbarEnabled(false); 
    mMap.getUiSettings().setRotateGesturesEnabled(false); 
    mMap.getUiSettings().setZoomControlsEnabled(false); 


    // Primer poso les coordenades i estableixo els punts (numerats amb lletres en castellà) 
    // i després afegeixo els marcadors, posant de localització 
    // el nom dels punts definits amb anterioritat 

    LocationManager locationManager = (LocationManager)getActivity().getSystemService(Context.LOCATION_SERVICE); 
    Criteria criteria = new Criteria(); 
    String provider = locationManager.getBestProvider(criteria, true); 
    Location location = locationManager.getLastKnownLocation(provider); 

    LatLng latLng = new LatLng(location.getLatitude(), location.getLongitude()); 
    LatLng p1 = new LatLng(41.39355, 2.15473); 
    mMap.addMarker(new MarkerOptions().position(p1).icon(BitmapDescriptorFactory.fromResource(R.drawable.pointer_bici1))); 
    mMap.moveCamera(CameraUpdateFactory.newLatLngZoom(latLng, 18)); 


} 

} 

Answer 1

正如我明白你正在嘗試做的，你是顯示了AlertDialog就像是一個搜索對話框，在其中你把地址查詢和當按鈕點擊時，你想它是se nt到MapFragment，它將被您的Geocoder使用。

簡而言之，唯一的問題是將的值從EditText傳遞到MapFragment。社區周圍看了看，用setArguments()，像這樣發現How to pass data from Activity to Fragment這樣的回答：

Bundle bundle = new Bundle(); 
bundle.putString(key, value); // preferred key and the location string you want 
fragment.setArguments(bundle); 

然後接受它在Fragment像這樣：

@Override 
    public View onCreateView(LayoutInflater inflater, ViewGroup container, 
    Bundle savedInstanceState) { 
      String strtext=getArguments().getString("message"); // replace "message" with the key you used. 

    return inflater.inflate(R.layout.fragment, container, false); 
    } 

您也可以使用監聽器，如果你想。儘管選擇是你的。希望這可以幫助。祝你好運。 :)