Android-谷歌地图开发（总结）

1.添加依赖及注册key
compile 'com.google.android.gms:play-services-maps:10.2.1'
compile 'com.google.android.gms:play-services:10.2.1'
注册key地址: https://console.developers.google.com，选择凭据进行注册，注册完记得在信息中心启用相应的API
2.在AndroidManifest中添加key
<meta-data
android:name="com.google.android.geo.API_KEY"
android:value="@string/google_maps_key" />
3.初始化显示地图
在要显示地图的layout中加入
<fragment
android:id="@+id/map"
class="com.google.android.gms.maps.SupportMapFragment"
android:layout_width="match_parent"
android:layout_height="match_parent" />
4.在activity中进行初始化
private GoogleMap mMap;
private GoogleApiClient mGoogleApiClient;
private Location mLastLocation;
private LocationRequest mLocationRequest;// 位置请求
SupportMapFragment mapFragment = (SupportMapFragment) getSupportFragmentManager()
.findFragmentById(R.id.map); //获取map控件id
mapFragment.getMapAsync(onMapReadyCallback); //设置回调
mGoogleApiClient = new GoogleApiClient.Builder(this) //初始化GoogleApiClient
.addConnectionCallbacks(connectedListener) //添加连接回调监听
.addOnConnectionFailedListener(connectionFailedListener) //添加连接失败回调监听
.addApi(LocationServices.API) //添加需要使用到的API
.addApi(Places.PLACE_DETECTION_API)
.addApi(Places.GEO_DATA_API)
.build();
5.地图设置参考，记得在onMapReadyCallback里进行设置，地图没准备好，会出现异常。

QQ20170517-082532.png

6.地图加载完成的回调
protected OnMapReadyCallback onMapReadyCallback = new OnMapReadyCallback() {
@Override
public void onMapReady(GoogleMap googleMap) {
mGoogleMap = googleMap;
mapSetting(); //第5步的mapsetting

//设置地图开始移动方法
mGoogleMap.setOnCameraMoveStartedListener(new GoogleMap.OnCameraMoveStartedListener() {
@Override
public void onCameraMoveStarted(int i) {

        });

//设置地图位置发生改变方法
mGoogleMap.setOnCameraIdleListener(new GoogleMap.OnCameraIdleListener() {
@Override
public void onCameraIdle() {
LatLng lat = mGoogleMap.getCameraPosition().target;//获取当前屏幕中点坐标
}
});
}
};
7.客户端连接回调
private GoogleApiClient.ConnectionCallbacks connectedListener = new GoogleApiClient.ConnectionCallbacks() {
@Override
public void onConnectionSuspended(int arg0) {
ViseLog.i("onConnectionSuspended");
}

    @Override
    public void onConnected(Bundle arg0) {
        // 请求最后已知的位置
        mLastLocation = LocationServices.FusedLocationApi.getLastLocation(mGoogleApiClient);
    }
};
private GoogleApiClient.OnConnectionFailedListener connectionFailedListener = new GoogleApiClient.OnConnectionFailedListener() {
    @Override
    public void onConnectionFailed(@NonNull ConnectionResult arg0) {
    }
};

8.位置监听
// 位置监听
private LocationListener locationListener = new LocationListener() {
@Override
public void onLocationChanged(Location location) {
// 第一次定位时，将地图位置移动到当前位置
if (isFristLocation) {
isFristLocation = false;
mLastLocation = location;
double startLatitude1 = mLastLocation.getLatitude();
double startLongitude1 = mLastLocation.getLongitude();
mGoogleMap.animateCamera(CameraUpdateFactory.newLatLng(new LatLng(startLatitude1, startLongitude1)));
stopLocationUpdates();
}
}
};
//开始定位
protected void startLocationUpdates() {
if (mGoogleApiClient.isConnected()) {
LocationServices.FusedLocationApi.requestLocationUpdates(mGoogleApiClient, mLocationRequest, locationListener);
}
}
//停止定位
protected void stopLocationUpdates() {
if (mGoogleApiClient.isConnected()) {
LocationServices.FusedLocationApi.removeLocationUpdates(mGoogleApiClient, locationListener);
}
}
9.生命周期
@Override
protected void onStart() {
// 开启图层定位
if (!mGoogleApiClient.isConnecting()) {
mGoogleApiClient.connect();
}
super.onStart();
}

@Override
protected void onStop() {
    // 关闭图层定位
    super.onStop();
    mGoogleApiClient.disconnect();
}

10.添加marker
mGoogleMap.addMarker(new MarkerOptions().position(marker的坐标).icon(BitmapDescriptorFactory.fromResource(marker图片资源)));
11.移动到指定坐标
mGoogleMap.moveCamera(CameraUpdateFactory.newLatLngZoom(你要的坐标, 地图放大比例));
mGoogleMap.animateCamera(CameraUpdateFactory.newLatLng(你要的坐标));
12.画线方法
PolylineOptions polylineOptions = new PolylineOptions().addAll(坐标集合).width(10).color(Color.BLUE);
Polyline line0 = mGoogleMap.addPolyline(polylineOptions);
13.其他参考资料
https://developers.google.com/maps/?hl=zh-cn