百度地图的使用－定位—逆地理编码（即坐标转地址）

先上效果：

1. 定位+拖动定位
2. 定位动画
3. 动画结束显示地址

实现思路

1. 中心点不变，在百度地图图层上覆盖自定义的定位布局
   （TextView＋ImageView＋ImageView）
2. 拖动地图时，隐藏地址显示，定位标示落下来后显示地址
3. 拿到百度地图的拖动监听 setOnMapStatusChangeListener
4. 拿到中心点经纬度，逆地理编码（即坐标转地址）mapStatus.target

具体实现：

布局：

在主界面布局上覆盖自己定位用的布局location_marker

<?xml version="1.0" encoding="utf-8"?>
<android.support.constraint.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context=".MainActivity">
<com.baidu.mapapi.map.MapView
android:id="@+id/bmapView"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:clickable="true" />
<include layout="@layout/location_marker"/>
</android.support.constraint.ConstraintLayout>

location_marker布局：三个控件

<?xml version="1.0" encoding="utf-8"?>
<android.support.constraint.ConstraintLayout
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical">
<ImageView
android:id="@+id/iv_shadow"
android:layout_width="22dp"
android:layout_height="4dp"
android:layout_centerHorizontal="true"
android:src="@drawable/location_shadow"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent"
app:layout_constraintBottom_toBottomOf="parent"/>
<ImageView
android:id="@+id/iv_location"
android:layout_width="36dp"
android:layout_height="36dp"
android:src="@drawable/location_ic_select"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintBottom_toTopOf="@id/iv_shadow"/>
<TextView
android:padding="2dp"
android:background="@drawable/shape_buttn_text"
android:id="@+id/tv_describe"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginBottom="8dp"
android:layout_marginEnd="8dp"
android:layout_marginLeft="8dp"
android:layout_marginRight="8dp"
android:layout_marginStart="8dp"
android:text="TextView"
app:layout_constraintBottom_toTopOf="@+id/iv_location"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent" />
</android.support.constraint.ConstraintLayout>

拖动监听

1. 创建地理编码检索实例；
2. 创建地理编码检索监听者；
3. 开始向上的动画
4. 停止拖动后，发起地理编码检索

mBaiduMap.setOnMapStatusChangeListener(new BaiduMap.OnMapStatusChangeListener() {
@Override
public void onMapStatusChangeStart(MapStatus mapStatus) {
mSearch = GeoCoder.newInstance();
mSearch.setOnGetGeoCodeResultListener(listener);
startUpAnimation(new Animation.AnimationListener() {
@Override
public void onAnimationStart(Animation animation) {
／／动画开始时，隐藏地址显示
tv_describe.setVisibility(View.INVISIBLE);
}
@Override
public void onAnimationEnd(Animation animation) {
}
@Override
public void onAnimationRepeat(Animation animation) {
}
});
}
@Override
public void onMapStatusChangeStart(MapStatus mapStatus, int i) {
}
@Override
public void onMapStatusChange(MapStatus mapStatus) {
}
@Override
public void onMapStatusChangeFinish(MapStatus mapStatus) {
mSearch.reverseGeoCode(new ReverseGeoCodeOption()
.location(mapStatus.target));
}
});

地理位置编码检索监听实现：

OnGetGeoCoderResultListener listener = new OnGetGeoCoderResultListener() {
public void onGetGeoCodeResult(GeoCodeResult result) {
if (result == null || result.error != SearchResult.ERRORNO.NO_ERROR) {
//没有检索到结果
}
//获取地理编码结果
}
@Override
public void onGetReverseGeoCodeResult(ReverseGeoCodeResult result) {
if (result == null || result.error != SearchResult.ERRORNO.NO_ERROR) {
//没有找到检索结果
Toast.makeText(MainActivity.this,"没有找到检索结果",Toast.LENGTH_SHORT).show();
}
//获取反向地理编码结果
String address = result.getAddress();
System.out.println(address+"---------");
tv_describe.setText(address);
startDownAnimation(new Animation.AnimationListener() {
@Override
public void onAnimationStart(Animation animation) {
}
@Override
public void onAnimationEnd(Animation animation) {
tv_describe.setVisibility(View.VISIBLE);
bounce();
}
@Override
public void onAnimationRepeat(Animation animation) {
}
});
}
};

三种动画的具体实现：

需要一个变量纪录是否向上

private boolean isUp = false;
/**
* 向上移动动画
*/
public void startUpAnimation(Animation.AnimationListener listener){
if (isUp){
return;
}
Animation animation = new TranslateAnimation(
0,
0,
0
,
- 80);
animation.setDuration(500);
animation.setFillAfter(true);//设置为true，动画转化结束后被应用
animation.setInterpolator(new AccelerateDecelerateInterpolator());
iv_location.startAnimation(animation);//开始动画
if(listener != null){
animation.setAnimationListener(listener);
}
isUp = true;
}
/**
* 向下移动动画
*/
public void startDownAnimation(Animation.AnimationListener listener){
if(isUp){
Animation animation = new TranslateAnimation(
0,
0,
-80,
0);
animation.setDuration(500);
animation.setFillAfter(true);//设置为true，动画转化结束后被应用
animation.setInterpolator(new AccelerateInterpolator(15));
if(listener != null){
animation.setAnimationListener(listener);
}
iv_location.startAnimation(animation);//开始动画
isUp = false;
}
}
/**
* 弹跳动画
*/
public
void bounce() {
if (iv_location.getVisibility() == View.VISIBLE) {
ObjectAnimator animator = ObjectAnimator.ofFloat(iv_location, "translationY", 0, -30, 0);
animator.setInterpolator(new EasingInterpolator(EasingInterpolator.Ease.ELASTIC_IN_OUT));
animator.setDuration(1000);
animator.setRepeatMode(ValueAnimator.REVERSE);
animator.start();
}
}

定位方面参考之前文章，更新一下之前写的MyLocationListener

新添加一个变量纪录是否第一次定位

private boolean isFirst = true;
class MyLocationListener extends BDAbstractLocationListener {
@Override
public void onReceiveLocation(BDLocation bdLocation) {
MyLocationData locData = new MyLocationData.Builder()
.accuracy(bdLocation.getRadius())
// 此处设置开发者获取到的方向信息，顺时针0-360
.direction(bdLocation.getDirection()).latitude(bdLocation.getLatitude())
.longitude(bdLocation.getLongitude()).build();
mBaiduMap.setMyLocationData(locData);
String addr = bdLocation.getAddrStr();
//获取详细地址信息
String country = bdLocation.getCountry();
//获取国家
String province = bdLocation.getProvince();
//获取省份
String city = bdLocation.getCity();
//获取城市
String district = bdLocation.getDistrict();
//获取区县
String street = bdLocation.getStreet();
//获取街道信息
//
showMyLocate(locData);
if(isFirst){
// 开始移动百度地图的定位地点到中心位置
LatLng ll = new LatLng(bdLocation.getLatitude(), bdLocation.getLongitude());
MapStatusUpdate u = MapStatusUpdateFactory.newLatLngZoom(ll,16);
mBaiduMap.animateMapStatus(u);
isFirst = false;
}
}
}
}