安卓开发_慕课网_百度地图_实现方向传感器

  1 package com.example.map;
  2 
  3 import com.baidu.location.BDLocation;
  4 import com.baidu.location.BDLocationListener;
  5 import com.baidu.location.LocationClient;
  6 import com.baidu.location.LocationClientOption;
  7 import com.baidu.mapapi.SDKInitializer;
  8 import com.baidu.mapapi.map.BaiduMap;
  9 import com.baidu.mapapi.map.BitmapDescriptor;
 10 import com.baidu.mapapi.map.BitmapDescriptorFactory;
 11 import com.baidu.mapapi.map.MapStatusUpdate;
 12 import com.baidu.mapapi.map.MapStatusUpdateFactory;
 13 import com.baidu.mapapi.map.MapView;
 14 import com.baidu.mapapi.map.MyLocationConfiguration;
 15 import com.baidu.mapapi.map.MyLocationConfiguration.LocationMode;
 16 import com.baidu.mapapi.map.MyLocationData;
 17 import com.baidu.mapapi.model.LatLng;
 18 import com.example.map.MyOrientationListener.OnOrientationListener;
 19 import com.example.map.R;
 20 
 21 import android.location.Location;
 22 import android.os.Bundle;
 23 import android.app.Activity;
 24 import android.content.Context;
 25 import android.graphics.Bitmap;
 26 import android.view.Menu;
 27 import android.view.MenuItem;
 28 import android.view.Window;
 29 import android.widget.Toast;
 30 
 31 public class MainActivity extends Activity {
 32     
 33     private MapView mMapView = null;
 34     private BaiduMap mBaiduMap;
 35     //简化代码            用于this.context=this;
 36     private Context context;
 37     //定位相关
 38     private LocationClient mLocationClient;
 39     private MyLocationListener mLocationListener;
 40     //是否第一次定位的标志
 41     private boolean isFirstIn = true;
 42     //定位经纬度
 43     private double mLatitude;
 44     private double mLongtitude;
 45     //自定义定位图标
 46     private BitmapDescriptor mIconLocation;
 47     private LocationMode mLocationMode;//控制模式
 48     private MyOrientationListener myOrientationListener;
 49     private float mCurrentX;
 50     
 51     
 52     @Override
 53     protected void onCreate(Bundle savedInstanceState) {
 54         super.onCreate(savedInstanceState);
 55       //在使用SDK各组件之前初始化context信息，传入ApplicationContext  
 56         //注意该方法要再setContentView方法之前实现  
 57         SDKInitializer.initialize(getApplicationContext());  
 58         
 59         requestWindowFeature(Window.FEATURE_NO_TITLE);
 60         setContentView(R.layout.activity_main);
 61         this.context = this;
 62         initView();
 63         //初始化定位
 64         initLocation();
 65         
 66     }
 67     
 68     private void initView() {
 69         // TODO Auto-generated method stub
 70         mMapView = (MapView) findViewById(R.id.bmapView);
 71         mBaiduMap = mMapView.getMap();
 72         //设置打开时的显示比列  这里显示500m左右
 73         MapStatusUpdate msu = MapStatusUpdateFactory.zoomTo(15.0f); 
 74         mBaiduMap.setMapStatus(msu);
 75         }
 76     private void initLocation() {
 77         // TODO Auto-generated method stub
 78         mLocationClient = new LocationClient(this);
 79         mLocationListener = new MyLocationListener();
 80         mLocationClient.registerLocationListener(mLocationListener);
 81         LocationClientOption option = new LocationClientOption();
 82         option.setCoorType("bd09ll");
 83         option.setIsNeedAddress(true);
 84         option.setOpenGps(true);
 85         option.setScanSpan(1000);
 86         
 87         mLocationClient.setLocOption(option);
 88         
 89         // 初始化图标
 90         mIconLocation = BitmapDescriptorFactory.fromResource(R.drawable.navi_map_gps_locked);
 91         myOrientationListener = new MyOrientationListener(context);
 92         myOrientationListener.setOnOrientationListener(new OnOrientationListener()
 93         {
 94             @Override
 95             public void onOrientationChanged(float x)
 96             {
 97                 mCurrentX = x;
 98             }
 99         });
100     }
101     //activity销毁时百度地图也销毁
102     @Override  
103     protected void onDestroy() {   
104         super.onDestroy();  
105         //在activity执行onDestroy时执行mMapView.onDestroy()，实现地图生命周期管理  
106         mMapView.onDestroy();  
107     }  
108     @Override
109     protected void onStart() {
110         // TODO Auto-generated method stub
111         super.onStart();
112         // 开启定位
113         mBaiduMap.setMyLocationEnabled(true);
114         if (!mLocationClient.isStarted())
115             mLocationClient.start();
116         // 开启方向传感器
117         myOrientationListener.start();
118             
119     }
120     @Override
121     protected void onStop() {
122         // TODO Auto-generated method stub
123         super.onStop();
124         // 停止定位
125         mBaiduMap.setMyLocationEnabled(false);
126         mLocationClient.stop();
127         // 停止方向传感器
128         myOrientationListener.stop();
129     }
130     @Override  
131     protected void onResume() {  
132         super.onResume();  
133         //在activity执行onResume时执行mMapView. onResume ()，实现地图生命周期管理  
134         mMapView.onResume();  
135         }  
136     @Override  
137     protected void onPause() {  
138         super.onPause();  
139         //在activity执行onPause时执行mMapView. onPause ()，实现地图生命周期管理  
140         mMapView.onPause();  
141         }  
142     @Override
143     public boolean onCreateOptionsMenu(Menu menu) {
144         // TODO Auto-generated method stub
145         
146         getMenuInflater().inflate(R.menu.main, menu);
147         return true;
148     }
149     //菜单按钮的响应事件
150     @Override
151     public boolean onOptionsItemSelected(MenuItem item) {
152         // TODO Auto-generated method stub
153         switch (item.getItemId()) {
154         case R.id.id_map_common:
155             mBaiduMap.setMapType(BaiduMap.MAP_TYPE_NORMAL);
156             break;
157         case R.id.id_map_site:
158             mBaiduMap.setMapType(BaiduMap.MAP_TYPE_SATELLITE);
159             break;
160         case R.id.id_map_traffic:
161             if(mBaiduMap.isTrafficEnabled())
162             {
163                 mBaiduMap.setTrafficEnabled(false);
164                 item.setTitle("实时交通(off)");
165             }
166             else
167             {
168                 mBaiduMap.setTrafficEnabled(true);
169                 item.setTitle("实时交通(on)");
170             }
171             break;
172         case R.id.id_map_location:
173             //定位最新自己的位置
174             centerToMyLocation();
175             break;
176 
177         default:
178             break;
179         }
180         return super.onOptionsItemSelected(item);
181     }
182     //进到自己的位置
183     private void centerToMyLocation() {
184         LatLng latLng = new LatLng(mLatitude,mLongtitude);
185         
186         MapStatusUpdate msu = MapStatusUpdateFactory.newLatLng(latLng);
187         mBaiduMap.animateMapStatus(msu);
188     }
189     private class MyLocationListener implements BDLocationListener{
190 
191         @Override
192         public void onReceiveLocation(BDLocation location) {
193             // TODO Auto-generated method stub
194             MyLocationData data = new MyLocationData.Builder()//
195             .direction(mCurrentX)//
196             .accuracy(location.getRadius())//
197             .latitude(location.getLatitude())//
198             .longitude(location.getLongitude())//
199             .build();
200     mBaiduMap.setMyLocationData(data);
201     // 设置自定义图标
202     MyLocationConfiguration config = new MyLocationConfiguration(mLocationMode.NORMAL, true, mIconLocation);
203     mBaiduMap.setMyLocationConfigeration(config);
204     //获取最新经纬度
205     mLatitude = location.getLatitude();
206     mLongtitude = location.getLongitude();
207     //判断是否第一次定位
208     if (isFirstIn)
209     {
210         //设置经纬度
211         LatLng latLng = new LatLng(location.getLatitude(),location.getLongitude());
212         
213         MapStatusUpdate msu = MapStatusUpdateFactory.newLatLng(latLng);
214         mBaiduMap.animateMapStatus(msu);
215         //将是否第一次定位的标志 变为不是第一次定位
216         isFirstIn = false;
217         //显示当前定位的位置
218         Toast.makeText(context, location.getAddrStr(),
219                 Toast.LENGTH_SHORT).show();
220     }
221 
222         }
223         
224     }
225 }

 1 package com.example.map;
 2 
 3 import android.content.Context;
 4 import android.hardware.Sensor;
 5 import android.hardware.SensorEvent;
 6 import android.hardware.SensorEventListener;
 7 import android.hardware.SensorManager;
 8 
 9 public class MyOrientationListener implements SensorEventListener
10 {
11     private SensorManager mSensorManager;
12     private Context mContext;
13     //传感器
14     private Sensor mSensor;
15     private float lastX;
16 
17     //构造方法
18     public MyOrientationListener(Context context)
19     {
20         this.mContext = context;
21     }
22 
23     @SuppressWarnings("deprecation")
24     //开始监听
25     public void start()
26     {
27         //拿到系统服务
28         mSensorManager = (SensorManager) mContext.getSystemService(Context.SENSOR_SERVICE);
29         if (mSensorManager != null)
30         {
31             // 获得方向传感器
32             mSensor = mSensorManager.getDefaultSensor(Sensor.TYPE_ORIENTATION);
33         }
34 
35         if (mSensor != null)
36         {
37             mSensorManager.registerListener(this, mSensor,
38                     SensorManager.SENSOR_DELAY_UI);
39         }
40     }
41 
42     //结束监听
43     public void stop()
44     {
45         mSensorManager.unregisterListener(this);
46     }
47 
48     @Override
49     public void onAccuracyChanged(Sensor arg0, int arg1)
50     {
51         // TODO Auto-generated method stub
52 
53     }
54 
55     @SuppressWarnings(
56     { "deprecation" })
57     @Override
58     //方向发生变化
59     public void onSensorChanged(SensorEvent event)
60     {
61         if (event.sensor.getType() == Sensor.TYPE_ORIENTATION)
62         {
63             float x = event.values[SensorManager.DATA_X];
64 
65             if (Math.abs(x - lastX) > 1.0)
66             {
67                 if (mOnOrientationListener != null)
68                 {
69                     mOnOrientationListener.onOrientationChanged(x);
70                 }
71             }
72 
73             lastX = x;
74 
75         }
76     }
77 
78     private OnOrientationListener mOnOrientationListener;
79 
80     public void setOnOrientationListener(
81             OnOrientationListener mOnOrientationListener)
82     {
83         this.mOnOrientationListener = mOnOrientationListener;
84     }
85 
86     public interface OnOrientationListener
87     {
88         void onOrientationChanged(float x);
89     }
90 
91 }