Implement bouncing marker for Google Maps Android API v2

Example to implement a bouncing marker:

  //Make the marker bounce
        final Handler handler = new Handler();
        
        final long startTime = SystemClock.uptimeMillis();
        final long duration = 2000;
        
        Projection proj = myMap.getProjection();
        final LatLng markerLatLng = marker.getPosition();
        Point startPoint = proj.toScreenLocation(markerLatLng);
        startPoint.offset(0, -100);
        final LatLng startLatLng = proj.fromScreenLocation(startPoint);

        final Interpolator interpolator = new BounceInterpolator();

        handler.post(new Runnable() {
            @Override
            public void run() {
                long elapsed = SystemClock.uptimeMillis() - startTime;
                float t = interpolator.getInterpolation((float) elapsed / duration);
                double lng = t * markerLatLng.longitude + (1 - t) * startLatLng.longitude;
                double lat = t * markerLatLng.latitude + (1 - t) * startLatLng.latitude;
                marker.setPosition(new LatLng(lat, lng));

                if (t < 1.0) {
                    // Post again 16ms later.
                    handler.postDelayed(this, 16);
                }
            }
        });
        

The code in main activity:

package com.example.androidmapsv2;

import com.google.android.gms.common.ConnectionResult;
import com.google.android.gms.common.GooglePlayServicesUtil;
import com.google.android.gms.maps.GoogleMap;
import com.google.android.gms.maps.Projection;
import com.google.android.gms.maps.GoogleMap.OnMapLongClickListener;
import com.google.android.gms.maps.GoogleMap.OnMarkerClickListener;
import com.google.android.gms.maps.MapFragment;
import com.google.android.gms.maps.model.BitmapDescriptor;
import com.google.android.gms.maps.model.BitmapDescriptorFactory;
import com.google.android.gms.maps.model.LatLng;
import com.google.android.gms.maps.model.Marker;
import com.google.android.gms.maps.model.MarkerOptions;

import android.os.Bundle;
import android.os.Handler;
import android.os.SystemClock;
import android.app.Activity;
import android.app.AlertDialog;
import android.app.FragmentManager;
import android.graphics.Point;
import android.view.Menu;
import android.view.MenuItem;
import android.view.animation.BounceInterpolator;
import android.view.animation.Interpolator;
import android.widget.TextView;
import android.widget.Toast;

public class MainActivity extends Activity 
 implements OnMapLongClickListener, OnMarkerClickListener{
 
 final int RQS_GooglePlayServices = 1;
 
 GoogleMap myMap;
 
 TextView tvLocInfo;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        tvLocInfo = (TextView)findViewById(R.id.locinfo);
        
        FragmentManager myFragmentManager = getFragmentManager();
        MapFragment myMapFragment 
         = (MapFragment)myFragmentManager.findFragmentById(R.id.map);
        myMap = myMapFragment.getMap();
        
        myMap.setMyLocationEnabled(true);

        //myMap.setMapType(GoogleMap.MAP_TYPE_HYBRID);
        //myMap.setMapType(GoogleMap.MAP_TYPE_NORMAL);
        //myMap.setMapType(GoogleMap.MAP_TYPE_SATELLITE);
        myMap.setMapType(GoogleMap.MAP_TYPE_TERRAIN);
        
        myMap.getUiSettings().setZoomControlsEnabled(true);
        myMap.getUiSettings().setCompassEnabled(true);
        myMap.getUiSettings().setMyLocationButtonEnabled(true);
        
        myMap.getUiSettings().setRotateGesturesEnabled(true);
        myMap.getUiSettings().setScrollGesturesEnabled(true);
        myMap.getUiSettings().setTiltGesturesEnabled(true);
        myMap.getUiSettings().setZoomGesturesEnabled(true);
        //or myMap.getUiSettings().setAllGesturesEnabled(true);
        
        myMap.setTrafficEnabled(true);
        
        myMap.setOnMapLongClickListener(this);
        myMap.setOnMarkerClickListener(this);

    }

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        // Inflate the menu; this adds items to the action bar if it is present.
        getMenuInflater().inflate(R.menu.activity_main, menu);
        return true;
    }

 @Override
 public boolean onOptionsItemSelected(MenuItem item) {
  switch (item.getItemId()) {
  case R.id.menu_legalnotices:
   String LicenseInfo = GooglePlayServicesUtil.getOpenSourceSoftwareLicenseInfo(
     getApplicationContext());
   AlertDialog.Builder LicenseDialog = new AlertDialog.Builder(MainActivity.this);
   LicenseDialog.setTitle("Legal Notices");
   LicenseDialog.setMessage(LicenseInfo);
   LicenseDialog.show();
   return true; 
  }
  return super.onOptionsItemSelected(item);
 }

 @Override
 protected void onResume() {

  super.onResume();
  
  int resultCode = GooglePlayServicesUtil.isGooglePlayServicesAvailable(getApplicationContext());
  
  if (resultCode == ConnectionResult.SUCCESS){
   Toast.makeText(getApplicationContext(), 
     "isGooglePlayServicesAvailable SUCCESS", 
     Toast.LENGTH_LONG).show(); 
  }else{
   GooglePlayServicesUtil.getErrorDialog(resultCode, this, RQS_GooglePlayServices); 
  }
 }

 @Override
 public void onMapLongClick(LatLng point) {
  tvLocInfo.setText("New marker added@" + point.toString());
  
  BitmapDescriptor bitmapDescriptor 
   = BitmapDescriptorFactory.fromResource(R.drawable.ic_launcher);
  
  myMap.addMarker(new MarkerOptions()
        .position(point)
        .icon(bitmapDescriptor)
        .title(point.toString()));

 }

 @Override
 public boolean onMarkerClick(final Marker marker) {

  //Make the marker bounce
        final Handler handler = new Handler();
        
        final long startTime = SystemClock.uptimeMillis();
        final long duration = 2000;
        
        Projection proj = myMap.getProjection();
        final LatLng markerLatLng = marker.getPosition();
        Point startPoint = proj.toScreenLocation(markerLatLng);
        startPoint.offset(0, -100);
        final LatLng startLatLng = proj.fromScreenLocation(startPoint);

        final Interpolator interpolator = new BounceInterpolator();

        handler.post(new Runnable() {
            @Override
            public void run() {
                long elapsed = SystemClock.uptimeMillis() - startTime;
                float t = interpolator.getInterpolation((float) elapsed / duration);
                double lng = t * markerLatLng.longitude + (1 - t) * startLatLng.longitude;
                double lat = t * markerLatLng.latitude + (1 - t) * startLatLng.latitude;
                marker.setPosition(new LatLng(lat, lng));

                if (t < 1.0) {
                    // Post again 16ms later.
                    handler.postDelayed(this, 16);
                }
            }
        });
        
        //return false; //have not consumed the event
        return true; //have consumed the event
 }
    
}

Download the files.

The series:

A simple example using Google Maps Android API v2, step by step.