如何实现像uber一样的可拖动 map ？我正在使用谷歌地图 v2。实际上我得到了引用 this post 的解决方案并在这里分享我的完整解决方案

最佳答案

使用最新代码更新还包括自动完成更改位置

完整的项目可以找到here

逻辑很简单，我们需要一个 framelayout 并在该 framelayout 内添加 map 和标记布局，然后将 maker 布局重力居中并获取中心点的纬度和经度相机变化的 map 引用 this answer 这是我的代码 创建activity_maps.xml

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="@android:color/white"
android:orientation="vertical">

<LinearLayout
    android:id="@+id/container_toolbar"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:orientation="vertical">

    <include
        android:id="@+id/toolbar"
        layout="@layout/toolbar" />

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_marginLeft="5dp"
        android:layout_marginRight="5dp"
        android:layout_marginTop="5dp"
        android:orientation="vertical">

        <TextView android:gravity="center_vertical"
            android:id="@+id/Locality"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:drawableLeft="@drawable/ic_btn_current_location"
            android:drawablePadding="@dimen/list_row_padding"
            android:ellipsize="end"
            android:padding="10dp"
            android:singleLine="true"
            android:text="Click to change location"
            android:textSize="@dimen/font_22" />

        <EditText
            android:id="@+id/Address"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_marginTop="5dp"
            android:ellipsize="end"
            android:enabled="false"
            android:hint="Address"
            android:singleLine="true" />
    </LinearLayout>
</LinearLayout>
<FrameLayout
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:layout_below="@+id/container_toolbar">

    <fragment
        xmlns:tools="http://schemas.android.com/tools"
        android:id="@+id/map"
        android:name="com.google.android.gms.maps.SupportMapFragment"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        tools:context="com.sample.sishin.maplocation.MapsActivity" />
    <LinearLayout
        android:id="@+id/locationMarker"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_gravity="center"
        android:layout_marginBottom="30dp"
        android:gravity="center"
        android:orientation="vertical" >

        <TextView
            android:id="@+id/locationMarkertext"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:background="@drawable/rounded_corner_map"
            android:gravity="center"
            android:minWidth="250dp"
            android:paddingLeft="2dp"
            android:paddingRight="2dp"
            android:text=" Set your Location "
            android:textColor="@android:color/white" />

        <ImageView
            android:id="@+id/imageMarker"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:src="@drawable/add_marker" />
    </LinearLayout>



</FrameLayout>

在此处创建 TextView 背景 xml rounded_corner_map.xml

<?xml version="1.0" encoding="UTF-8"?>
<shape xmlns:android="http://schemas.android.com/apk/res/android" >

    <solid android:color="#000000" />

    <stroke
        android:width="2dp"
        android:color="#FFFFFF" />

    <padding
        android:bottom="8dp"
        android:left="1dp"
        android:right="1dp"
        android:top="8dp" />

    <corners
        android:bottomLeftRadius="15dp"
        android:bottomRightRadius="15dp"
        android:topLeftRadius="15dp"
        android:topRightRadius="15dp" />

</shape>

这是我的 Activity 类 MainActivity.java

    package com.sample.sishin.maplocation;

    import android.Manifest;
    import android.app.AlertDialog;
    import android.content.Context;
    import android.content.DialogInterface;
    import android.content.Intent;
    import android.content.pm.PackageManager;
    import android.location.Location;
    import android.os.Handler;
    import android.os.ResultReceiver;
    import android.provider.Settings;
    import android.support.v4.app.ActivityCompat;
    import android.os.Bundle;

    import android.support.v7.app.AppCompatActivity;
    import android.support.v7.widget.Toolbar;
    import android.util.Log;
    import android.view.View;
    import android.widget.EditText;
    import android.widget.TextView;
    import android.widget.Toast;

    import com.google.android.gms.common.ConnectionResult;
    import com.google.android.gms.common.GoogleApiAvailability;
    import com.google.android.gms.common.GooglePlayServicesNotAvailableException;
    import com.google.android.gms.common.GooglePlayServicesRepairableException;
    import com.google.android.gms.common.GooglePlayServicesUtil;
    import com.google.android.gms.common.api.GoogleApiClient;
    import com.google.android.gms.common.api.Status;
    import com.google.android.gms.location.LocationRequest;
    import com.google.android.gms.location.LocationServices;
    import com.google.android.gms.location.places.Place;
    import com.google.android.gms.location.places.ui.PlaceAutocomplete;
    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.CameraPosition;
    import com.google.android.gms.maps.model.LatLng;

    public class MapsActivity extends AppCompatActivity implements OnMapReadyCallback, GoogleApiClient.ConnectionCallbacks, GoogleApiClient.OnConnectionFailedListener, com.google.android.gms.location.LocationListener {
    private GoogleMap mMap;
    private GoogleApiClient mGoogleApiClient;
    private final static int PLAY_SERVICES_RESOLUTION_REQUEST = 9000;
    private static String TAG = "MAP LOCATION";
    Context mContext;
    TextView mLocationMarkerText;
    private LatLng mCenterLatLong;


    /**
     * Receiver registered with this activity to get the response from FetchAddressIntentService.
     */
    private AddressResultReceiver mResultReceiver;
    /**
     * The formatted location address.
     */
    protected String mAddressOutput;
    protected String mAreaOutput;
    protected String mCityOutput;
    protected String mStateOutput;
    EditText mLocationAddress;
    TextView mLocationText;
    private static final int REQUEST_CODE_AUTOCOMPLETE = 1;
    Toolbar mToolbar;


    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_maps);
        mContext = this;
        // Obtain the SupportMapFragment and get notified when the map is ready to be used.
        SupportMapFragment mapFragment = (SupportMapFragment) getSupportFragmentManager()
                .findFragmentById(R.id.map);

        mLocationMarkerText = (TextView) findViewById(R.id.locationMarkertext);
        mLocationAddress = (EditText) findViewById(R.id.Address);
        mLocationText = (TextView) findViewById(R.id.Locality);
        mToolbar = (Toolbar) findViewById(R.id.toolbar);
        setSupportActionBar(mToolbar);
        getSupportActionBar().setDisplayShowHomeEnabled(true);

        getSupportActionBar().setTitle(getResources().getString(R.string.app_name));


        mLocationText.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {

                openAutocompleteActivity();

            }


        });
        mapFragment.getMapAsync(this);
        mResultReceiver = new AddressResultReceiver(new Handler());

        if (checkPlayServices()) {
            // If this check succeeds, proceed with normal processing.
            // Otherwise, prompt user to get valid Play Services APK.
            if (!AppUtils.isLocationEnabled(mContext)) {
                // notify user
                AlertDialog.Builder dialog = new AlertDialog.Builder(mContext);
                dialog.setMessage("Location not enabled!");
                dialog.setPositiveButton("Open location settings", new DialogInterface.OnClickListener() {
                    @Override
                    public void onClick(DialogInterface paramDialogInterface, int paramInt) {
                        Intent myIntent = new Intent(Settings.ACTION_LOCATION_SOURCE_SETTINGS);
                        startActivity(myIntent);
                    }
                });
                dialog.setNegativeButton("Cancel", new DialogInterface.OnClickListener() {

                    @Override
                    public void onClick(DialogInterface paramDialogInterface, int paramInt) {
                        // TODO Auto-generated method stub

                    }
                });
                dialog.show();
            }
            buildGoogleApiClient();
        } else {
            Toast.makeText(mContext, "Location not supported in this device", Toast.LENGTH_SHORT).show();
        }

    }


    /**
     * Manipulates the map once available.
     * This callback is triggered when the map is ready to be used.
     * This is where we can add markers or lines, add listeners or move the camera. In this case,
     * we just add a marker near Sydney, Australia.
     * If Google Play services is not installed on the device, the user will be prompted to install
     * it inside the SupportMapFragment. This method will only be triggered once the user has
     * installed Google Play services and returned to the app.
     */
    @Override
    public void onMapReady(GoogleMap googleMap) {
        Log.d(TAG, "OnMapReady");
        mMap = googleMap;

        mMap.setOnCameraChangeListener(new GoogleMap.OnCameraChangeListener() {
            @Override
            public void onCameraChange(CameraPosition cameraPosition) {
                Log.d("Camera postion change" + "", cameraPosition + "");
                mCenterLatLong = cameraPosition.target;


                mMap.clear();

                try {

                    Location mLocation = new Location("");
                    mLocation.setLatitude(mCenterLatLong.latitude);
                    mLocation.setLongitude(mCenterLatLong.longitude);

                    startIntentService(mLocation);
                    mLocationMarkerText.setText("Lat : " + mCenterLatLong.latitude + "," + "Long : " + mCenterLatLong.longitude);

                } catch (Exception e) {
                    e.printStackTrace();
                }
            }
        });
        if (ActivityCompat.checkSelfPermission(this, Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED && ActivityCompat.checkSelfPermission(this, Manifest.permission.ACCESS_COARSE_LOCATION) != PackageManager.PERMISSION_GRANTED) {
            // TODO: Consider calling
            //    ActivityCompat#requestPermissions
            // here to request the missing permissions, and then overriding
            //   public void onRequestPermissionsResult(int requestCode, String[] permissions,
            //                                          int[] grantResults)
            // to handle the case where the user grants the permission. See the documentation
            // for ActivityCompat#requestPermissions for more details.
            return;
        }
//        mMap.setMyLocationEnabled(true);
//        mMap.getUiSettings().setMyLocationButtonEnabled(true);
//
//        // Add a marker in Sydney and move the camera
//        LatLng sydney = new LatLng(-34, 151);
//        mMap.addMarker(new MarkerOptions().position(sydney).title("Marker in Sydney"));
//        mMap.moveCamera(CameraUpdateFactory.newLatLng(sydney));
    }

    @Override
    public void onConnected(Bundle bundle) {
        if (ActivityCompat.checkSelfPermission(this, Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED && ActivityCompat.checkSelfPermission(this, Manifest.permission.ACCESS_COARSE_LOCATION) != PackageManager.PERMISSION_GRANTED) {
            // TODO: Consider calling
            //    ActivityCompat#requestPermissions
            // here to request the missing permissions, and then overriding
            //   public void onRequestPermissionsResult(int requestCode, String[] permissions,
            //                                          int[] grantResults)
            // to handle the case where the user grants the permission. See the documentation
            // for ActivityCompat#requestPermissions for more details.
            return;
        }
        Location mLastLocation = LocationServices.FusedLocationApi.getLastLocation(
                mGoogleApiClient);
        if (mLastLocation != null) {
            changeMap(mLastLocation);
            Log.d(TAG, "ON connected");

        } else
            try {
                LocationServices.FusedLocationApi.removeLocationUpdates(
                        mGoogleApiClient, this);

            } catch (Exception e) {
                e.printStackTrace();
            }
        try {
            LocationRequest mLocationRequest = new LocationRequest();
            mLocationRequest.setInterval(10000);
            mLocationRequest.setFastestInterval(5000);
            mLocationRequest.setPriority(LocationRequest.PRIORITY_HIGH_ACCURACY);
            LocationServices.FusedLocationApi.requestLocationUpdates(
                    mGoogleApiClient, mLocationRequest, this);

        } catch (Exception e) {
            e.printStackTrace();
        }

    }

    @Override
    public void onConnectionSuspended(int i) {
        Log.i(TAG, "Connection suspended");
        mGoogleApiClient.connect();
    }

    @Override
    public void onLocationChanged(Location location) {
        try {
            if (location != null)
                changeMap(location);
            LocationServices.FusedLocationApi.removeLocationUpdates(
                    mGoogleApiClient, this);

        } catch (Exception e) {
            e.printStackTrace();
        }
    }

    @Override
    public void onConnectionFailed(ConnectionResult connectionResult) {

    }


    protected synchronized void buildGoogleApiClient() {
        mGoogleApiClient = new GoogleApiClient.Builder(this)
                .addConnectionCallbacks(this)
                .addOnConnectionFailedListener(this)
                .addApi(LocationServices.API)
                .build();
    }

    @Override
    protected void onStart() {
        super.onStart();
        try {
            mGoogleApiClient.connect();

        } catch (Exception e) {
            e.printStackTrace();
        }
    }

    @Override
    protected void onStop() {
        super.onStop();
        try {

        } catch (RuntimeException e) {
            e.printStackTrace();
        }
        if (mGoogleApiClient != null && mGoogleApiClient.isConnected()) {
            mGoogleApiClient.disconnect();
        }
    }

    private boolean checkPlayServices() {
        int resultCode = GooglePlayServicesUtil.isGooglePlayServicesAvailable(this);
        if (resultCode != ConnectionResult.SUCCESS) {
            if (GooglePlayServicesUtil.isUserRecoverableError(resultCode)) {
                GooglePlayServicesUtil.getErrorDialog(resultCode, this,
                        PLAY_SERVICES_RESOLUTION_REQUEST).show();
            } else {
                //finish();
            }
            return false;
        }
        return true;
    }

    private void changeMap(Location location) {

        Log.d(TAG, "Reaching map" + mMap);


        if (ActivityCompat.checkSelfPermission(this, Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED && ActivityCompat.checkSelfPermission(this, Manifest.permission.ACCESS_COARSE_LOCATION) != PackageManager.PERMISSION_GRANTED) {
            // TODO: Consider calling
            //    ActivityCompat#requestPermissions
            // here to request the missing permissions, and then overriding
            //   public void onRequestPermissionsResult(int requestCode, String[] permissions,
            //                                          int[] grantResults)
            // to handle the case where the user grants the permission. See the documentation
            // for ActivityCompat#requestPermissions for more details.
            return;
        }

        // check if map is created successfully or not
        if (mMap != null) {
            mMap.getUiSettings().setZoomControlsEnabled(false);
            LatLng latLong;


            latLong = new LatLng(location.getLatitude(), location.getLongitude());

            CameraPosition cameraPosition = new CameraPosition.Builder()
                    .target(latLong).zoom(19f).tilt(70).build();

            mMap.setMyLocationEnabled(true);
            mMap.getUiSettings().setMyLocationButtonEnabled(true);
            mMap.animateCamera(CameraUpdateFactory
                    .newCameraPosition(cameraPosition));

            mLocationMarkerText.setText("Lat : " + location.getLatitude() + "," + "Long : " + location.getLongitude());
            startIntentService(location);


        } else {
            Toast.makeText(getApplicationContext(),
                    "Sorry! unable to create maps", Toast.LENGTH_SHORT)
                    .show();
        }

    }


    /**
     * Receiver for data sent from FetchAddressIntentService.
     */
    class AddressResultReceiver extends ResultReceiver {
        public AddressResultReceiver(Handler handler) {
            super(handler);
        }

        /**
         * Receives data sent from FetchAddressIntentService and updates the UI in MainActivity.
         */
        @Override
        protected void onReceiveResult(int resultCode, Bundle resultData) {

            // Display the address string or an error message sent from the intent service.
            mAddressOutput = resultData.getString(AppUtils.LocationConstants.RESULT_DATA_KEY);

            mAreaOutput = resultData.getString(AppUtils.LocationConstants.LOCATION_DATA_AREA);

            mCityOutput = resultData.getString(AppUtils.LocationConstants.LOCATION_DATA_CITY);
            mStateOutput = resultData.getString(AppUtils.LocationConstants.LOCATION_DATA_STREET);

            displayAddressOutput();

            // Show a toast message if an address was found.
            if (resultCode == AppUtils.LocationConstants.SUCCESS_RESULT) {
                //  showToast(getString(R.string.address_found));


            }


        }

    }

    /**
     * Updates the address in the UI.
     */
    protected void displayAddressOutput() {
        //  mLocationAddressTextView.setText(mAddressOutput);
        try {
            if (mAreaOutput != null)
               // mLocationText.setText(mAreaOutput+ "");

            mLocationAddress.setText(mAddressOutput);
            //mLocationText.setText(mAreaOutput);
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

    /**
     * Creates an intent, adds location data to it as an extra, and starts the intent service for
     * fetching an address.
     */
    protected void startIntentService(Location mLocation) {
        // Create an intent for passing to the intent service responsible for fetching the address.
        Intent intent = new Intent(this, FetchAddressIntentService.class);

        // Pass the result receiver as an extra to the service.
        intent.putExtra(AppUtils.LocationConstants.RECEIVER, mResultReceiver);

        // Pass the location data as an extra to the service.
        intent.putExtra(AppUtils.LocationConstants.LOCATION_DATA_EXTRA, mLocation);

        // Start the service. If the service isn't already running, it is instantiated and started
        // (creating a process for it if needed); if it is running then it remains running. The
        // service kills itself automatically once all intents are processed.
        startService(intent);
    }


    private void openAutocompleteActivity() {
        try {
            // The autocomplete activity requires Google Play Services to be available. The intent
            // builder checks this and throws an exception if it is not the case.
            Intent intent = new PlaceAutocomplete.IntentBuilder(PlaceAutocomplete.MODE_FULLSCREEN)
                    .build(this);
            startActivityForResult(intent, REQUEST_CODE_AUTOCOMPLETE);
        } catch (GooglePlayServicesRepairableException e) {
            // Indicates that Google Play Services is either not installed or not up to date. Prompt
            // the user to correct the issue.
            GoogleApiAvailability.getInstance().getErrorDialog(this, e.getConnectionStatusCode(),
                    0 /* requestCode */).show();
        } catch (GooglePlayServicesNotAvailableException e) {
            // Indicates that Google Play Services is not available and the problem is not easily
            // resolvable.
            String message = "Google Play Services is not available: " +
                    GoogleApiAvailability.getInstance().getErrorString(e.errorCode);

            Toast.makeText(mContext, message, Toast.LENGTH_SHORT).show();
        }
    }

    /**
     * Called after the autocomplete activity has finished to return its result.
     */
    @Override
    public void onActivityResult(int requestCode, int resultCode, Intent data) {
        super.onActivityResult(requestCode, resultCode, data);

        // Check that the result was from the autocomplete widget.
        if (requestCode == REQUEST_CODE_AUTOCOMPLETE) {
            if (resultCode == RESULT_OK) {
                // Get the user's selected place from the Intent.
                Place place = PlaceAutocomplete.getPlace(mContext, data);

                // TODO call location based filter


                LatLng latLong;


                latLong = place.getLatLng();

                //mLocationText.setText(place.getName() + "");

                CameraPosition cameraPosition = new CameraPosition.Builder()
                        .target(latLong).zoom(19f).tilt(70).build();

                if (ActivityCompat.checkSelfPermission(this, Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED && ActivityCompat.checkSelfPermission(this, Manifest.permission.ACCESS_COARSE_LOCATION) != PackageManager.PERMISSION_GRANTED) {
                    // TODO: Consider calling
                    //    ActivityCompat#requestPermissions
                    // here to request the missing permissions, and then overriding
                    //   public void onRequestPermissionsResult(int requestCode, String[] permissions,
                    //                                          int[] grantResults)
                    // to handle the case where the user grants the permission. See the documentation
                    // for ActivityCompat#requestPermissions for more details.
                    return;
                }
                mMap.setMyLocationEnabled(true);
                mMap.animateCamera(CameraUpdateFactory
                        .newCameraPosition(cameraPosition));


            }


        } else if (resultCode == PlaceAutocomplete.RESULT_ERROR) {
            Status status = PlaceAutocomplete.getStatus(mContext, data);
        } else if (resultCode == RESULT_CANCELED) {
            // Indicates that the activity closed before a selection was made. For example if
            // the user pressed the back button.
        }
    }


    }

list 文件是

    <?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.sample.sishin.maplocation">

    <!--
         The ACCESS_COARSE/FINE_LOCATION permissions are not required to use
         Google Maps Android API v2, but you must specify either coarse or fine
         location permissions for the 'MyLocation' functionality. 
    -->
    <uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />
    <uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION" />
    <application
        android:allowBackup="true"
        android:icon="@mipmap/ic_launcher"
        android:label="@string/app_name"
        android:supportsRtl="true"
        android:theme="@style/AppTheme">

        <!--
             The API key for Google Maps-based APIs is defined as a string resource.
             (See the file "res/values/google_maps_api.xml").
             Note that the API key is linked to the encryption key used to sign the APK.
             You need a different API key for each encryption key, including the release key that is used to
             sign the APK for publishing.
             You can define the keys for the debug and release targets in src/debug/ and src/release/. 
        -->


        <meta-data
            android:name="com.google.android.geo.API_KEY"
            android:value="your key here" />

        <activity
            android:name="com.sample.sishin.maplocation.MapsActivity"
            android:label="@string/title_activity_maps">
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
        <service
            android:name="com.sample.sishin.maplocation.FetchAddressIntentService"
            android:exported="false" />

    </application>

</manifest>

关于android - 如何实现像 uber android 一样的可拖动 map ，使用更改位置进行更新，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/27504606/