Java 像 Uber Android 一样在地图上旋转标记和移动动画
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时间：2020-08-11 16:49:37 来源:igfitidea点击:
Rotate Marker and Move Animation on Map like Uber Android
提问by VipiN Negi
I am working on a project similar to UBER, Lyft or OLA ie. Map on the home with available moving Cars. I'm looking for some kind of Library which can make Cars move and take turn smoothly just like UBER. For now I was able to move car smoothly from one lat-long to another with the below code. But tricky part is Taking turn and make sure the car face to front when moving to direction.
我正在做一个类似于 UBER、Lyft 或 OLA 的项目，即。在家里用可用的移动汽车绘制地图。我正在寻找某种图书馆，它可以让汽车像优步一样平稳地移动和转弯。现在，我能够使用以下代码将汽车从一个纬度平稳地移动到另一个纬度。但棘手的部分是转弯并确保汽车在向方向行驶时面向前方。
Smooth Moving Car Code:
平稳移动汽车代码：
final LatLng SomePos = new LatLng(12.7796354, 77.4159606);
try {
if (googleMap == null) {
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.HONEYCOMB) {
googleMap = ((MapFragment) getFragmentManager().findFragmentById(R.id.map)).getMap();
}
}
googleMap.setMapType(GoogleMap.MAP_TYPE_NORMAL);
googleMap.setMyLocationEnabled(true);
googleMap.setTrafficEnabled(false);
googleMap.setIndoorEnabled(false);
googleMap.setBuildingsEnabled(true);
googleMap.getUiSettings().setZoomControlsEnabled(true);
googleMap.moveCamera(CameraUpdateFactory.newLatLng(SomePos));
googleMap.moveCamera(CameraUpdateFactory.newCameraPosition(new CameraPosition.Builder()
.target(googleMap.getCameraPosition().target)
.zoom(17)
.bearing(30)
.tilt(45)
.build()));
myMarker = googleMap.addMarker(new MarkerOptions()
.position(SomePos)
.icon(BitmapDescriptorFactory.fromResource(R.mipmap.ic_launcher))
.title("Hello world"));
googleMap.setOnMarkerClickListener(new GoogleMap.OnMarkerClickListener() {
@Override
public boolean onMarkerClick(Marker arg0) {
final LatLng startPosition = myMarker.getPosition();
final LatLng finalPosition = new LatLng(12.7801569, 77.4148528);
final Handler handler = new Handler();
final long start = SystemClock.uptimeMillis();
final Interpolator interpolator = new AccelerateDecelerateInterpolator();
final float durationInMs = 3000;
final boolean hideMarker = false;
handler.post(new Runnable() {
long elapsed;
float t;
float v;
@Override
public void run() {
// Calculate progress using interpolator
elapsed = SystemClock.uptimeMillis() - start;
t = elapsed / durationInMs;
LatLng currentPosition = new LatLng(
startPosition.latitude * (1 - t) + finalPosition.latitude * t,
startPosition.longitude * (1 - t) + finalPosition.longitude * t);
myMarker.setPosition(currentPosition);
// Repeat till progress is complete.
if (t < 1) {
// Post again 16ms later.
handler.postDelayed(this, 16);
} else {
if (hideMarker) {
myMarker.setVisible(false);
} else {
myMarker.setVisible(true);
}
}
}
});
return true;
}
});
} catch (Exception e) {
e.printStackTrace();
}
采纳答案by Prasad
I recently came across the same use-case. Here is my solution on it.
我最近遇到了相同的用例。这是我的解决方案。
First, I would like to thank @VipiN for sharing "The Smooth Moving Car Code". It works smoothly.
首先，我要感谢@VipiN 分享“平稳行驶的汽车代码”。它工作顺利。
The second part is to place car-marker in the right direction and rotate it according to turns. To achieve this I calculated the bearing or heading angle between two successive points(i.e. location updates you receive from device/server). This linkwill help you understand the maths behind it.
第二部分是将车标放置在正确的方向并根据转弯进行旋转。为了实现这一点，我计算了两个连续点之间的方位角或航向角（即您从设备/服务器收到的位置更新）。此链接将帮助您了解其背后的数学原理。
The following code will give you bearing between two locations:
以下代码将为您提供两个位置之间的方位：
private double bearingBetweenLocations(LatLng latLng1,LatLng latLng2) {
double PI = 3.14159;
double lat1 = latLng1.latitude * PI / 180;
double long1 = latLng1.longitude * PI / 180;
double lat2 = latLng2.latitude * PI / 180;
double long2 = latLng2.longitude * PI / 180;
double dLon = (long2 - long1);
double y = Math.sin(dLon) * Math.cos(lat2);
double x = Math.cos(lat1) * Math.sin(lat2) - Math.sin(lat1)
* Math.cos(lat2) * Math.cos(dLon);
double brng = Math.atan2(y, x);
brng = Math.toDegrees(brng);
brng = (brng + 360) % 360;
return brng;
}
Finally, we need to rotate the car-marker by the angle that we get from above method.
最后，我们需要按照我们从上面的方法得到的角度来旋转汽车标记。
private void rotateMarker(final Marker marker, final float toRotation) {
if(!isMarkerRotating) {
final Handler handler = new Handler();
final long start = SystemClock.uptimeMillis();
final float startRotation = marker.getRotation();
final long duration = 1000;
final Interpolator interpolator = new LinearInterpolator();
handler.post(new Runnable() {
@Override
public void run() {
isMarkerRotating = true;
long elapsed = SystemClock.uptimeMillis() - start;
float t = interpolator.getInterpolation((float) elapsed / duration);
float rot = t * toRotation + (1 - t) * startRotation;
marker.setRotation(-rot > 180 ? rot / 2 : rot);
if (t < 1.0) {
// Post again 16ms later.
handler.postDelayed(this, 16);
} else {
isMarkerRotating = false;
}
}
});
}
}
Cheers!
干杯!
回答by VipiN Negi
Since its been bit confusing for SO users to look for working code in two different posts. Here is the working code for Rotate and Move Markerwhich seamlessly worked for me.
因为 SO 用户在两个不同的帖子中查找工作代码有点令人困惑。这是Rotate 和 Move Marker的工作代码，它对我来说是无缝的。
in MainActivity.java
在MainActivity.java 中
public void rotateMarker(final Marker marker, final float toRotation, final float st) {
final Handler handler = new Handler();
final long start = SystemClock.uptimeMillis();
final float startRotation = st;
final long duration = 1555;
final Interpolator interpolator = new LinearInterpolator();
handler.post(new Runnable() {
@Override
public void run() {
long elapsed = SystemClock.uptimeMillis() - start;
float t = interpolator.getInterpolation((float) elapsed / duration);
float rot = t * toRotation + (1 - t) * startRotation;
marker.setRotation(-rot > 180 ? rot / 2 : rot);
if (t < 1.0) {
// Post again 16ms later.
handler.postDelayed(this, 16);
}
}
});
}
public void animateMarker(final LatLng toPosition,final boolean hideMarke) {
final Handler handler = new Handler();
final long start = SystemClock.uptimeMillis();
Projection proj = googleMap.getProjection();
Point startPoint = proj.toScreenLocation(m.getPosition());
final LatLng startLatLng = proj.fromScreenLocation(startPoint);
final long duration = 5000;
final Interpolator interpolator = new LinearInterpolator();
handler.post(new Runnable() {
@Override
public void run() {
long elapsed = SystemClock.uptimeMillis() - start;
float t = interpolator.getInterpolation((float) elapsed
/ duration);
double lng = t * toPosition.longitude + (1 - t)
* startLatLng.longitude;
double lat = t * toPosition.latitude + (1 - t)
* startLatLng.latitude;
m.setPosition(new LatLng(lat, lng));
if (t < 1.0) {
// Post again 16ms later.
handler.postDelayed(this, 16);
} else {
if (hideMarke) {
m.setVisible(false);
} else {
m.setVisible(true);
}
}
}
});
}
回答by Shubham Arora
Finally wrote the code that works exactly in the similar manner that OLA CABSdoes...
最后编写的代码与OLA CABS 的工作方式完全相同......
Here it is -
这里是 -
Put your google maps fragment in a Relative layout and put the marker(as image view ) in the center -
In your fragment's code once you have setup all the google maps basic working write the following code for the onMapReady(GoogleMap googleMap)function-
将您的谷歌地图片段放在相对布局中，并将标记（作为图像视图）放在中心 -
一旦你设置了所有谷歌地图的基本工作，在你的片段代码中为onMapReady(GoogleMap googleMap)函数编写以下代码 -
My Code is as follows -
我的代码如下 -
//Step 1 -
//第1步 -
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="match_parent">
<fragment
android:id="@+id/map"
android:name="com.google.android.gms.maps.SupportMapFragment"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context=".MapsActivity_for_request_pages" />
<ImageView
android:layout_width="30sp"
android:layout_height="30sp"
android:layout_centerInParent="true"
android:id="@+id/central_marker"
android:src="@drawable/marker_pic"/>
</RelativeLayout>
//Step 2 -
//第2步 -
@Override
public void onMapReady(GoogleMap googleMap) {
central_marker = (ImageView)v.findViewById(R.id.central_marker);
int init_loc = 0,final_loc = -300;
mMap = googleMap;
final CountDownTimer timer = new CountDownTimer(300,300) {
@Override
public void onTick(long millisUntilFinished) {
}
@Override
public void onFinish() {
init_loc = 0;
ObjectAnimator objectAnimatorY = ObjectAnimator.ofFloat(central_marker, "translationY", final_loc, init_loc);
objectAnimatorY.setDuration(200);
objectAnimatorY.start();
}
};
mMap.setOnCameraMoveStartedListener(new GoogleMap.OnCameraMoveStartedListener() {
@Override
public void onCameraMoveStarted(int i) {
System.out.println("Camera started moving worked");
timer.cancel();
ObjectAnimator objectAnimatorY = ObjectAnimator.ofFloat(central_marker, "translationY", init_loc, final_loc);
objectAnimatorY.setDuration(200);
objectAnimatorY.start();
init_loc = -300;
}
});
mMap.setOnCameraIdleListener(new GoogleMap.OnCameraIdleListener() {
@Override
public void onCameraIdle() {
System.out.println("Camera idle worked");
if(initial_flag!=0)
{
System.out.println("Camera Setting timer now");
timer.cancel();
timer.start();
}
initial_flag++;
System.out.println("Camera Value of initial_flag ="+initial_flag);
}
});
}
回答by Suraj Bahadur
Here is my code to move marker like uber. i have shown two ways to move marker .
这是我移动像uber这样的标记的代码。我已经展示了两种移动标记的方法。
Important Note: To move car on proper road [like ola,uber] you need to use road api provided by google
重要提示：要在正确的道路上移动汽车 [如 ola,uber]，您需要使用谷歌提供的道路 API
1.By static latitude and longitude
1.按静态经纬度
2.By Real time Latitude and longitude
2.按实时经纬度
package com.gangsofcoder.googlemapdemo;
import android.animation.Animator;
import android.animation.AnimatorListenerAdapter;
import android.animation.ValueAnimator;
import android.location.Location;
import android.location.LocationManager;
import android.os.Bundle;
import android.os.Handler;
import android.os.PersistableBundle;
import android.support.annotation.Nullable;
import android.support.v7.app.AppCompatActivity;
import android.util.Log;
import android.view.animation.LinearInterpolator;
import android.widget.Button;
import android.widget.Toast;
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.CameraPosition;
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 com.loopj.android.http.AsyncHttpResponseHandler;
import com.loopj.android.http.RequestParams;
import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;
import java.util.ArrayList;
import cz.msebera.android.httpclient.Header;
public class MoveCar extends AppCompatActivity {
private GoogleMap googleMap;
SupportMapFragment mapFragment;
Marker marker;
private boolean isMarkerRotating = false;
ArrayList<LatLng> listOfPoints = new ArrayList<>();
int currentPt = 0;
LatLng finalPosition;
Marker mMarker;
@Override
public void onCreate(@Nullable Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
setUpMapIfNeeded();
//new location details
listOfPoints.add(new LatLng(30.701623, 76.684220));
listOfPoints.add(new LatLng(30.702486, 76.685487));
listOfPoints.add(new LatLng(30.703135, 76.684891));
listOfPoints.add(new LatLng(30.703256, 76.685000));
listOfPoints.add(new LatLng(30.703883, 76.685941));
listOfPoints.add(new LatLng(30.703413, 76.685190));
}
private void setUpMapIfNeeded() {
if (mapFragment == null) {
mapFragment = (SupportMapFragment) getSupportFragmentManager().findFragmentById(R.id.map);
if (mapFragment != null) {
mapFragment.getMapAsync(new OnMapReadyCallback() {
@Override
public void onMapReady(GoogleMap googleMap) {
loadMap(googleMap);
}
});
}
}
}
private void loadMap(GoogleMap map) {
googleMap = map;
mMarker = googleMap.addMarker(new MarkerOptions().position(new LatLng(30.701623, 76.684220)).icon(BitmapDescriptorFactory.fromResource(R.drawable.icon_car)));
final Handler handler = new Handler();
//Code to move car along static latitude and longitude
/* handler.postDelayed(new Runnable() {
@Override
public void run() {
if (currentPt < listOfPoints.size()) {
//post again
Log.d("tess", "inside run ");
Location targetLocation = new Location(LocationManager.GPS_PROVIDER);
targetLocation.setLatitude(listOfPoints.get(currentPt).latitude);
targetLocation.setLongitude(listOfPoints.get(currentPt).longitude);
animateMarkerNew(targetLocation, mMarker);
handler.postDelayed(this, 3000);
currentPt++;
} else {
Log.d("tess", "call back removed");
//removed callbacks
handler.removeCallbacks(this);
}
}
}, 3000);*/
//Here move marker along real time updates
final RequestParams params = new RequestParams();
params.put("source_lattitude", "lat");
params.put("source_longitude", "long");
params.put("date", "date");
//new handler
handler.postDelayed(new Runnable() {
@Override
public void run() {
LoopjHttpClient.post(getString(R.string.default_upload_website), params, new AsyncHttpResponseHandler() {
@Override
public void onSuccess(int statusCode, Header[] headers, byte[] responseBody) {
try {
JSONObject jsonObject = new JSONObject(new String(responseBody));
String status = jsonObject.getString("status");
String text = jsonObject.getString("text");
//reading json array
JSONArray jsonArray = jsonObject.getJSONArray("result");
String source = jsonArray.getJSONObject(0).getString("source");
String[] latLong = source.split(",");
Location location = new Location(LocationManager.GPS_PROVIDER);
location.setLatitude(Double.parseDouble(latLong[0]));
location.setLongitude(Double.parseDouble(latLong[1]));
//calling method to animate marker
animateMarkerNew(location, mMarker);
} catch (JSONException e) {
e.printStackTrace();
}
}
@Override
public void onFailure(int statusCode, Header[] headers, byte[] responseBody, Throwable error) {
Log.d("onFailure", "onFailure");
}
});
handler.postDelayed(this, 3000);
}
}, 3000);
}
private void animateMarkerNew(final Location destination, final Marker marker) {
if (marker != null) {
final LatLng startPosition = marker.getPosition();
final LatLng endPosition = new LatLng(destination.getLatitude(), destination.getLongitude());
final float startRotation = marker.getRotation();
final LatLngInterpolatorNew latLngInterpolator = new LatLngInterpolatorNew.LinearFixed();
ValueAnimator valueAnimator = ValueAnimator.ofFloat(0, 1);
valueAnimator.setDuration(3000); // duration 3 second
valueAnimator.setInterpolator(new LinearInterpolator());
valueAnimator.addUpdateListener(new ValueAnimator.AnimatorUpdateListener() {
@Override
public void onAnimationUpdate(ValueAnimator animation) {
try {
float v = animation.getAnimatedFraction();
LatLng newPosition = latLngInterpolator.interpolate(v, startPosition, endPosition);
marker.setPosition(newPosition);
googleMap.moveCamera(CameraUpdateFactory.newCameraPosition(new CameraPosition.Builder()
.target(newPosition)
.zoom(15.5f)
.build()));
marker.setRotation(getBearing(startPosition, new LatLng(destination.getLatitude(), destination.getLongitude())));
} catch (Exception ex) {
//I don't care atm..
}
}
});
valueAnimator.addListener(new AnimatorListenerAdapter() {
@Override
public void onAnimationEnd(Animator animation) {
super.onAnimationEnd(animation);
// if (mMarker != null) {
// mMarker.remove();
// }
// mMarker = googleMap.addMarker(new MarkerOptions().position(endPosition).icon(BitmapDescriptorFactory.fromResource(R.drawable.icon_car)));
}
});
valueAnimator.start();
}
}
private interface LatLngInterpolatorNew {
LatLng interpolate(float fraction, LatLng a, LatLng b);
class LinearFixed implements LatLngInterpolatorNew {
@Override
public LatLng interpolate(float fraction, LatLng a, LatLng b) {
double lat = (b.latitude - a.latitude) * fraction + a.latitude;
double lngDelta = b.longitude - a.longitude;
// Take the shortest path across the 180th meridian.
if (Math.abs(lngDelta) > 180) {
lngDelta -= Math.signum(lngDelta) * 360;
}
double lng = lngDelta * fraction + a.longitude;
return new LatLng(lat, lng);
}
}
}
//Method for finding bearing between two points
private float getBearing(LatLng begin, LatLng end) {
double lat = Math.abs(begin.latitude - end.latitude);
double lng = Math.abs(begin.longitude - end.longitude);
if (begin.latitude < end.latitude && begin.longitude < end.longitude)
return (float) (Math.toDegrees(Math.atan(lng / lat)));
else if (begin.latitude >= end.latitude && begin.longitude < end.longitude)
return (float) ((90 - Math.toDegrees(Math.atan(lng / lat))) + 90);
else if (begin.latitude >= end.latitude && begin.longitude >= end.longitude)
return (float) (Math.toDegrees(Math.atan(lng / lat)) + 180);
else if (begin.latitude < end.latitude && begin.longitude >= end.longitude)
return (float) ((90 - Math.toDegrees(Math.atan(lng / lat))) + 270);
return -1;
}
}
回答by Anshuman Parashar
Firstly,I would like to thank you both @Vipin Negi & @Prasad for such a good & awesomely working code.Since there are many pending queries above, I want to make all the above stuff a little simpler. Guys, just follow the following steps to achieve the marker rotation.
首先，我要感谢@Vipin Negi 和@Prasad 提供这么好的代码。由于上面有许多待处理的查询，我想让上面的所有内容都简单一点。伙计们，只需按照以下步骤来实现标记旋转。
1. Define below two methods in your MainActivity.java file
1. 在 MainActivity.java 文件中定义以下两个方法
private double bearingBetweenLocations(LatLng latLng1, LatLng latLng2) {
double PI = 3.14159;
double lat1 = latLng1.latitude * PI / 180;
double long1 = latLng1.longitude * PI / 180;
double lat2 = latLng2.latitude * PI / 180;
double long2 = latLng2.longitude * PI / 180;
double dLon = (long2 - long1);
double y = Math.sin(dLon) * Math.cos(lat2);
double x = Math.cos(lat1) * Math.sin(lat2) - Math.sin(lat1)
* Math.cos(lat2) * Math.cos(dLon);
double brng = Math.atan2(y, x);
brng = Math.toDegrees(brng);
brng = (brng + 360) % 360;
return brng;
}
&
&
private void rotateMarker(final Marker marker, final float toRotation) {
final Handler handler = new Handler();
final long start = SystemClock.uptimeMillis();
final float startRotation = marker.getRotation();
final long duration = 1000;
final Interpolator interpolator = new LinearInterpolator();
handler.post(new Runnable() {
@Override
public void run() {
long elapsed = SystemClock.uptimeMillis() - start;
float t = interpolator.getInterpolation((float) elapsed / duration);
float rot = t * toRotation + (1 - t) * startRotation;
marker.setRotation(-rot > 180 ? rot / 2 : rot);
if (t < 1.0) {
// Post again 16ms later.
handler.postDelayed(this, 16);
}
}
});
}
2. After this, add the following lines to the code where you want your marker to rotate.
2. 在此之后，将以下行添加到您希望标记旋转的代码中。
double bearing = bearingBetweenLocations(m.getPosition(), updatedLatLng);
rotateMarker(m, (float) bearing);
Note that "m" is your marker object that you want to rotate. And, you're done!!!
请注意，“m”是您要旋转的标记对象。而且，你完成了！！！
If you want marker animation related help,you can use thiscode.
如果您需要标记动画相关的帮助，可以使用 此代码。
