एंड्रॉइड के लिए Google मानचित्र एपीआई में वर्तमान स्थान पर स्वचालित रूप से ज़ूम कैसे करूं?

Question

मैंने एंड्रॉइड स्टूडियो में Google मानचित्र एपीआई को एकीकृत किया है, और यह वर्तमान स्थान भी पाता है, लेकिन मैं ज़ूम स्तर को बढ़ाना चाहता हूं, ताकि मैं अपना वर्तमान स्थान अधिक स्पष्ट और सटीक देख सकूं। मैं ज़ूम स्तर कैसे बढ़ा सकता हूं?

आप नीचे दिए गए मेरे कोड पा सकते हैं:

package com.example.umar.testgoogle; 

import android.location.Location; 

import android.content.IntentSender; 
import android.location.Location; 
import android.os.Bundle; 
import android.support.v4.app.FragmentActivity; 
import android.util.Log; 

import com.google.android.gms.common.ConnectionResult; 
import com.google.android.gms.common.api.GoogleApiClient; 
import com.google.android.gms.location.LocationListener; 
import com.google.android.gms.location.LocationRequest; 
import com.google.android.gms.location.LocationServices; 
import com.google.android.gms.maps.CameraUpdateFactory; 
import com.google.android.gms.maps.GoogleMap; 
import com.google.android.gms.maps.SupportMapFragment; 
import com.google.android.gms.maps.model.LatLng; 
import com.google.android.gms.maps.model.MarkerOptions; 

public class MapsActivity extends FragmentActivity implements 
    GoogleApiClient.ConnectionCallbacks, 
    GoogleApiClient.OnConnectionFailedListener, 
    LocationListener { 

    public static final String TAG = MapsActivity.class.getSimpleName(); 

    /* 
    * Define a request code to send to Google Play services 
    * This code is returned in Activity.onActivityResult 
    */ 
    private final static int CONNECTION_FAILURE_RESOLUTION_REQUEST = 9000; 

    private GoogleMap mMap; // Might be null if Google Play services APK is not available. 

    private GoogleApiClient mGoogleApiClient; 
    private LocationRequest mLocationRequest; 

    @Override 
    protected void onCreate(Bundle savedInstanceState) { 
     super.onCreate(savedInstanceState); 
     setContentView(R.layout.activity_maps); 
     setUpMapIfNeeded(); 


     mGoogleApiClient = new GoogleApiClient.Builder(this) 
      .addConnectionCallbacks(this) 
      .addOnConnectionFailedListener(this) 
      .addApi(LocationServices.API) 
      .build(); 

    // Create the LocationRequest object 
     mLocationRequest = LocationRequest.create() 
      .setPriority(LocationRequest.PRIORITY_HIGH_ACCURACY) 
      .setInterval(10 * 1000)  // 10 seconds, in milliseconds 
      .setFastestInterval(1 * 1000); // 1 second, in milliseconds 
    } 

    @Override 
    protected void onResume() { 
     super.onResume(); 
     setUpMapIfNeeded(); 
     mGoogleApiClient.connect(); 
    } 

    @Override 
    protected void onPause() { 
     super.onPause(); 

     if (mGoogleApiClient.isConnected()) { 
        LocationServices.FusedLocationApi.removeLocationUpdates(mGoogleApiClient, this); 
      mGoogleApiClient.disconnect(); 
     } 
    } 

/** 
* Sets up the map if it is possible to do so (i.e., the Google Play services APK is correctly 
* installed) and the map has not already been instantiated.. This will ensure that we only ever 
* call {@link #setUpMap()} once when {@link #mMap} is not null. 
* <p/> 
* If it isn't installed {@link SupportMapFragment} (and 
* {@link com.google.android.gms.maps.MapView MapView}) will show a prompt for the user to 
* install/update the Google Play services APK on their device. 
* <p/> 
* A user can return to this FragmentActivity after following the prompt and correctly 
* installing/updating/enabling the Google Play services. Since the FragmentActivity may not 
* have been completely destroyed during this process (it is likely that it would only be 
* stopped or paused), {@link #onCreate(Bundle)} may not be called again so we should call this 
* method in {@link #onResume()} to guarantee that it will be called. 
*/ 
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(); 
     } 
    } 
} 

/** 
* This is where we can add markers or lines, add listeners or move the camera. In this case, we 
* just add a marker near Africa. 
* <p/> 
* This should only be called once and when we are sure that {@link #mMap} is not null. 
*/ 
private void setUpMap() { 
    mMap.addMarker(new MarkerOptions().position(new LatLng(0, 0)).title("Marker")); 
} 

private void handleNewLocation(Location location) { 
    Log.d(TAG, location.toString()); 

    double currentLatitude = location.getLatitude(); 
    double currentLongitude = location.getLongitude(); 

    LatLng latLng = new LatLng(currentLatitude, currentLongitude); 

    //mMap.addMarker(new MarkerOptions().position(new LatLng(currentLatitude, currentLongitude)).title("Current Location")); 
    MarkerOptions options = new MarkerOptions() 
      .position(latLng) 
      .title("I am here!"); 
    mMap.addMarker(options); 
    mMap.moveCamera(CameraUpdateFactory.newLatLng(latLng)); 
} 

@Override 
public void onConnected(Bundle bundle) { 
    Location location = LocationServices.FusedLocationApi.getLastLocation(mGoogleApiClient); 

    if (location == null) { 
     LocationServices.FusedLocationApi.requestLocationUpdates(mGoogleApiClient, mLocationRequest, this); 
    } 
    else { 
     handleNewLocation(location); 
    } 
} 

@Override 
public void onConnectionSuspended(int i) { 

} 

@Override 
public void onConnectionFailed(ConnectionResult connectionResult) { 
    /* 
    * Google Play services can resolve some errors it detects. 
    * If the error has a resolution, try sending an Intent to 
    * start a Google Play services activity that can resolve 
    * error. 
    */ 
    if (connectionResult.hasResolution()) { 
     try { 
      // Start an Activity that tries to resolve the error 
      connectionResult.startResolutionForResult(this, CONNECTION_FAILURE_RESOLUTION_REQUEST); 
      /* 
      * Thrown if Google Play services canceled the original 
      * PendingIntent 
      */ 
     } catch (IntentSender.SendIntentException e) { 
      // Log the error 
      e.printStackTrace(); 
     } 
    } else { 
     /* 
     * If no resolution is available, display a dialog to the 
     * user with the error. 
     */ 
     Log.i(TAG, "Location services connection failed with code " + connectionResult.getErrorCode()); 
    } 
} 

@Override 
public void onLocationChanged(Location location) { 
    handleNewLocation(location); 
} 

} से

Answer 1

बदलें:

mMap.moveCamera(CameraUpdateFactory.newLatLng(latLng)); 

रहे हैं:

float zoomLevel = 16.0f; //This goes up to 21 
mMap.moveCamera(CameraUpdateFactory.newLatLngZoom(latLng, zoomLevel)); 

सार्वजनिक स्थिर CameraUpdate newLatLngZoom (LatLng LatLng, नाव ज़ूम)

एक CameraUpdate कि एक अक्षांश और देशांतर एक LatLng वस्तु द्वारा निर्दिष्ट करने के लिए स्क्रीन के बीच ले जाता है देता है, और दिए गए ज़ूम स्तर पर ले जाता है।

पैरामीटर अक्षांश अक्षांश और रेखांश युक्त लैट्लिंग ऑब्जेक्ट latLng। वांछित ज़ूम स्तर ज़ूम करें, 2.0 से 21.0 की सीमा में। इस श्रेणी के नीचे मान 2.0 पर सेट हैं, और इसके ऊपर के मान 21.0 पर सेट हैं। ज़ूम इन करने के लिए मान बढ़ाएं। सभी क्षेत्रों में सबसे बड़े ज़ूम स्तरों पर टाइल्स नहीं हैं। परिवर्तन युक्त कैमरा अपडेटडेटा देता है।