Android Google地图接入（二）

前面完成了地图的显示，现在想要获取位置数据，需要使用到另一个API：Google Play services Location API。
接收位置更新基本流程：
1. 连接LocationServices；
2. 定义位置更新回调；
3. 请求位置更新
Activity代码：

import android.location.Location;
import android.os.Bundle;
import android.support.annotation.NonNull;
import android.support.v4.app.FragmentActivity;
import android.util.Log;
import android.widget.TextView;import com.google.android.gms.common.ConnectionResult;
import com.google.android.gms.common.api.GoogleApiClient;
import com.google.android.gms.common.api.GoogleApiClient.ConnectionCallbacks;
import com.google.android.gms.common.api.GoogleApiClient.OnConnectionFailedListener;
import com.google.android.gms.location.LocationListener;
import com.google.android.gms.location.LocationRequest;
import com.google.android.gms.location.LocationServices;
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.UiSettings;
import com.google.android.gms.maps.model.LatLng;public class MainActivity extends FragmentActivity {public final String TAG = "MainActivity";private TextView infoTextView;private GoogleMap mMap;private GoogleApiClient mGoogleApiClient;private Location mLastLocation;private LocationRequest mLocationRequest;// 位置请求@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.activity_main);infoTextView = (TextView) findViewById(R.id.information);SupportMapFragment mapFragment = (SupportMapFragment) getSupportFragmentManager().findFragmentById(R.id.map);mapFragment.getMapAsync(onMapReadyCallback);// Builds single client object that connect to LocationServicesmGoogleApiClient = new GoogleApiClient.Builder(this).addConnectionCallbacks(connectedListener).addOnConnectionFailedListener(connectionFailedListener).addApi(LocationServices.API).build();}@Overrideprotected void onStart() {mGoogleApiClient.connect();// 连接Google Play服务super.onStart();}@Overrideprotected void onPause() {super.onPause();stopLocationUpdates();// 停止位置更新}@Overrideprotected void onStop() {mGoogleApiClient.disconnect();// 断开连接super.onStop();}protected OnMapReadyCallback onMapReadyCallback = new OnMapReadyCallback() {@Overridepublic void onMapReady(GoogleMap googleMap) {mMap = googleMap;mapSetting();}};private void mapSetting() {mMap.setMapType(GoogleMap.MAP_TYPE_NORMAL);mMap.setMyLocationEnabled(true);UiSettings uiSettings = mMap.getUiSettings();uiSettings.setZoomControlsEnabled(true);mLocationRequest = new LocationRequest();mLocationRequest.setInterval(10000);mLocationRequest.setFastestInterval(5000);mLocationRequest.setPriority(LocationRequest.PRIORITY_HIGH_ACCURACY);}// 客户端连接回调private final ConnectionCallbacks connectedListener = new ConnectionCallbacks() {@Overridepublic void onConnectionSuspended(int arg0) {Log.i(TAG, "onConnectionSuspended");}@Overridepublic void onConnected(Bundle arg0) {// 请求最后已知的位置mLastLocation = LocationServices.FusedLocationApi.getLastLocation(mGoogleApiClient);LatLng mLastLatLng = new LatLng(mLastLocation.getLatitude(), mLastLocation.getLongitude());mMap.moveCamera(CameraUpdateFactory.newLatLngZoom(mLastLatLng, 16));// 启动位置更新startLocationUpdates();}};private final OnConnectionFailedListener connectionFailedListener = new OnConnectionFailedListener() {@Overridepublic void onConnectionFailed(@NonNull ConnectionResult arg0) {Log.e(TAG, "onConnectionFailed");}};// 位置监听private final LocationListener locationListener = new LocationListener() {@Overridepublic void onLocationChanged(Location location) {// 精确度越小越准，单位：米if (location.getAccuracy() > 100) {return;}mLastLocation = location;updateUI();}};private void updateUI() {StringBuilder stringBuilder = new StringBuilder();stringBuilder.append("Accuracy :").append(mLastLocation.getAccuracy()).append("\n").append("Altitude :").append(mLastLocation.getAltitude()).append("\n").append("Bearing :").append(mLastLocation.getBearing()).append("\n").append("ElapsedRealtimeNanos :").append(mLastLocation.getElapsedRealtimeNanos()).append("\n").append("Latitude :").append(mLastLocation.getLatitude()).append("\n").append("Longitude :").append(mLastLocation.getLongitude()).append("\n").append("Provider :").append(mLastLocation.getProvider()).append("\n").append("Speed :").append(mLastLocation.getSpeed()).append("\n").append("Time :").append(mLastLocation.getTime()).append("\n");infoTextView.setText(stringBuilder.toString());}protected void startLocationUpdates() {LocationServices.FusedLocationApi.requestLocationUpdates(mGoogleApiClient, mLocationRequest, locationListener);}protected void stopLocationUpdates() {LocationServices.FusedLocationApi.removeLocationUpdates(mGoogleApiClient, locationListener);}
}

获取位置数据：

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