How to Implement draggable map like uber android, Update with change location

Question

How to implement draggable map like uber? I am using Google maps v2. Actually i got the solution referring this post and sharing my complete solution here

Answer 1

You can try out this example done by me....

Example done by me

activity_main.xml

marker_view.xml

location_display_view.xml

MapWrapperLayout.java

package com.rajeshvijayakumar.map.demo.wrapper;

public class MapWrapperLayout extends FrameLayout {

public interface OnDragListener {
    public void onDrag(MotionEvent motionEvent);
}

private OnDragListener mOnDragListener;

public MapWrapperLayout(Context context) {
    super(context);
}

@Override
public boolean dispatchTouchEvent(MotionEvent ev) {
    if (mOnDragListener != null) {
        mOnDragListener.onDrag(ev);
    }
    return super.dispatchTouchEvent(ev);
}

public void setOnDragListener(OnDragListener mOnDragListener) {
    this.mOnDragListener = mOnDragListener;
}
}

CustomMapFragment.java

package com.rajeshvijayakumar.map.demo.ui;

public class CustomMapFragment extends MapFragment {

private View mOriginalView;
private MapWrapperLayout mMapWrapperLayout;

@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
    mOriginalView = super.onCreateView(inflater, container, savedInstanceState);

    mMapWrapperLayout = new MapWrapperLayout(getActivity());
    mMapWrapperLayout.addView(mOriginalView);

    return mMapWrapperLayout;
   }

    @Override
     public View getView() {
        return mOriginalView;
     }

      public void setOnDragListener(MapWrapperLayout.OnDragListener onDragListener) {
        mMapWrapperLayout.setOnDragListener(onDragListener);
      }
  }

MainActivity.java

public class MainActivity extends Activity implements OnDragListener {

// Google Map
private GoogleMap googleMap;
private CustomMapFragment mCustomMapFragment;

private View mMarkerParentView;
private ImageView mMarkerImageView;

private int imageParentWidth = -1;
private int imageParentHeight = -1;
private int imageHeight = -1;
private int centerX = -1;
private int centerY = -1;

private TextView mLocationTextView;

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

    // InitializeUI
    initializeUI();

}

private void initializeUI() {

    try {
        // Loading map
        initilizeMap();

    } catch (Exception e) {
        e.printStackTrace();
    }
    mLocationTextView = (TextView) findViewById(R.id.location_text_view);
    mMarkerParentView = findViewById(R.id.marker_view_incl);
    mMarkerImageView = (ImageView) findViewById(R.id.marker_icon_view);
}

@Override
public void onWindowFocusChanged(boolean hasFocus) {
    DisplayMetrics displaymetrics = new DisplayMetrics();
    getWindowManager().getDefaultDisplay().getMetrics(displaymetrics);

    imageParentWidth = mMarkerParentView.getWidth();
    imageParentHeight = mMarkerParentView.getHeight();
    imageHeight = mMarkerImageView.getHeight();

    centerX = imageParentWidth / 2;
    centerY = (imageParentHeight / 2) + (imageHeight / 2);
}

private void initilizeMap() {
    if (googleMap == null) {
        mCustomMapFragment = ((CustomMapFragment) getFragmentManager()
                .findFragmentById(R.id.map));
        mCustomMapFragment.setOnDragListener(MainActivity.this);
        googleMap = mCustomMapFragment.getMap();
        // check if map is created successfully or not
        if (googleMap == null) {
            Toast.makeText(getApplicationContext(),
                    "Sorry! unable to create maps", Toast.LENGTH_SHORT)
                    .show();
        }
    }
    // CameraUpdate cameraUpdate = CameraUpdateFactory.newLatLngZoom(latLng,
    // 10);
    // googleMap.animateCamera(cameraUpdate);
    // locationManager.removeUpdates(this);
}

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

@Override
public void onDrag(MotionEvent motionEvent) {
    if (motionEvent.getAction() == MotionEvent.ACTION_UP) {
        Projection projection = (googleMap != null && googleMap
                .getProjection() != null) ? googleMap.getProjection()
                : null;
        //
        if (projection != null) {
            LatLng centerLatLng = projection.fromScreenLocation(new Point(
                    centerX, centerY));
            updateLocation(centerLatLng);
        }
    }
}

private void updateLocation(LatLng centerLatLng) {
    if (centerLatLng != null) {
        Geocoder geocoder = new Geocoder(MainActivity.this,
                Locale.getDefault());

        List
 addresses = new ArrayList
();
        try {
            addresses = geocoder.getFromLocation(centerLatLng.latitude,
                    centerLatLng.longitude, 1);
        } catch (IOException e) {
            e.printStackTrace();
        }

        if (addresses != null && addresses.size() > 0) {

            String addressIndex0 = (addresses.get(0).getAddressLine(0) != null) ? addresses
                    .get(0).getAddressLine(0) : null;
            String addressIndex1 = (addresses.get(0).getAddressLine(1) != null) ? addresses
                    .get(0).getAddressLine(1) : null;
            String addressIndex2 = (addresses.get(0).getAddressLine(2) != null) ? addresses
                    .get(0).getAddressLine(2) : null;
            String addressIndex3 = (addresses.get(0).getAddressLine(3) != null) ? addresses
                    .get(0).getAddressLine(3) : null;

            String completeAddress = addressIndex0 + "," + addressIndex1;

            if (addressIndex2 != null) {
                completeAddress += "," + addressIndex2;
            }
            if (addressIndex3 != null) {
                completeAddress += "," + addressIndex3;
            }
            if (completeAddress != null) {
                mLocationTextView.setText(completeAddress);
            }
        }
    }
}
}