Android开发之高德地图实现定位

<!-- 申请必要的权限--><uses-permission android:name="android.permission.INTERNET" /><uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" /><uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" /><uses-permission android:name="android.permission.ACCESS_WIFI_STATE" /><uses-permission android:name="android.permission.READ_PHONE_STATE" /><uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION" /><uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" /><uses-permission android:name="android.permission.ACCESS_LOCATION_EXTRA_COMMANDS" /><uses-permission android:name="android.permission.ACCESS_MOCK_LOCATION" /><uses-permission android:name="android.permission.CHANGE_WIFI_STATE" /><application  android:icon="@mipmap/ic_launcher"  android:label="@string/app_name"  android:theme="@style/AppTheme"  >  <!--设置key-->  <meta-data   android:name="com.amap.api.v2.apikey"   android:value="这里填写第一步你申请的那个key" />  <!--声明定位service-->  <service android:name="com.amap.api.location.APSService"></service></application>

<com.amap.api.maps2d.MapView xmlns:android="http://schemas.android.com/apk/res/android" android:id="@+id/map" android:layout_width="fill_parent" android:layout_height="fill_parent" />

//监听定位和定位变化public class MainActivity extends AppCompatActivity implements LocationSource, AMapLocationListener { //显示地图需要的变量 private MapView mapView;//地图控件 private AMap aMap;//地图对象 //定位需要的声明 private AMapLocationClient mLocationClient = null;//定位发起端 private AMapLocationClientOption mLocationOption = null;//定位参数 private OnLocationChangedListener mListener = null;//定位监听器 //标识，用于判断是否只显示一次定位信息和用户重新定位 private boolean isFirstLoc = true; @Override protected void onCreate(Bundle savedInstanceState) {  super.onCreate(savedInstanceState);  setContentView(R.layout.activity_main);  //显示地图  mapView = (MapView) findViewById(R.id.map);  //必须要写  mapView.onCreate(savedInstanceState);  //获取地图对象  aMap = mapView.getMap();  //设置显示定位按钮 并且可以点击  UiSettings settings = aMap.getUiSettings();  //设置定位监听  aMap.setLocationSource(this);  // 是否显示定位按钮  settings.setMyLocationButtonEnabled(true);  // 是否可触发定位并显示定位层  aMap.setMyLocationEnabled(true);  //定位的小图标 默认是蓝点 这里自定义一团火，其实就是一张图片  MyLocationStyle myLocationStyle = new MyLocationStyle();  myLocationStyle.myLocationIcon(BitmapDescriptorFactory.fromResource(R.mipmap.firetwo));  myLocationStyle.radiusFillColor(android.R.color.transparent);  myLocationStyle.strokeColor(android.R.color.transparent);  aMap.setMyLocationStyle(myLocationStyle);  //开始定位  initLoc(); } //定位 private void initLoc() {  //初始化定位  mLocationClient = new AMapLocationClient(getApplicationContext());  //设置定位回调监听  mLocationClient.setLocationListener(this);  //初始化定位参数  mLocationOption = new AMapLocationClientOption();  //设置定位模式为高精度模式，Battery_Saving为低功耗模式，Device_Sensors是仅设备模式  mLocationOption.setLocationMode(AMapLocationClientOption.AMapLocationMode.Hight_Accuracy);  //设置是否返回地址信息（默认返回地址信息）  mLocationOption.setNeedAddress(true);  //设置是否只定位一次,默认为false  mLocationOption.setOnceLocation(false);  //设置是否强制刷新WIFI，默认为强制刷新  mLocationOption.setWifiActiveScan(true);  //设置是否允许模拟位置,默认为false，不允许模拟位置  mLocationOption.setMockEnable(false);  //设置定位间隔,单位毫秒,默认为2000ms  mLocationOption.setInterval(2000);  //给定位客户端对象设置定位参数  mLocationClient.setLocationOption(mLocationOption);  //启动定位  mLocationClient.startLocation(); } //定位回调函数 @Override public void onLocationChanged(AMapLocation amapLocation) {  if (amapLocation != null) {   if (amapLocation.getErrorCode() == 0) {    //定位成功回调信息，设置相关消息    amapLocation.getLocationType();//获取当前定位结果来源，如网络定位结果，详见官方定位类型表    amapLocation.getLatitude();//获取纬度    amapLocation.getLongitude();//获取经度    amapLocation.getAccuracy();//获取精度信息    SimpleDateFormat df = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");    Date date = new Date(amapLocation.getTime());    df.format(date);//定位时间    amapLocation.getAddress();//地址，如果option中设置isNeedAddress为false，则没有此结果，网络定位结果中会有地址信息，GPS定位不返回地址信息。    amapLocation.getCountry();//国家信息    amapLocation.getProvince();//省信息    amapLocation.getCity();//城市信息    amapLocation.getDistrict();//城区信息    amapLocation.getStreet();//街道信息    amapLocation.getStreetNum();//街道门牌号信息    amapLocation.getCityCode();//城市编码    amapLocation.getAdCode();//地区编码    // 如果不设置标志位，此时再拖动地图时，它会不断将地图移动到当前的位置    if (isFirstLoc) {     //设置缩放级别     aMap.moveCamera(CameraUpdateFactory.zoomTo(17));     //将地图移动到定位点     aMap.moveCamera(CameraUpdateFactory.changeLatLng(new LatLng(amapLocation.getLatitude(), amapLocation.getLongitude())));     //点击定位按钮 能够将地图的中心移动到定位点     mListener.onLocationChanged(amapLocation);     //添加图钉     aMap.addMarker(getMarkerOptions(amapLocation));     //获取定位信息     StringBuffer buffer = new StringBuffer();     buffer.append(amapLocation.getCountry() + "" + amapLocation.getProvince() + "" + amapLocation.getCity() + "" + amapLocation.getProvince() + "" + amapLocation.getDistrict() + "" + amapLocation.getStreet() + "" + amapLocation.getStreetNum());     Toast.makeText(getApplicationContext(), buffer.toString(), Toast.LENGTH_LONG).show();     isFirstLoc = false;    }   } else {    //显示错误信息ErrCode是错误码，errInfo是错误信息，详见错误码表。    Log.e("AmapError", "location Error, ErrCode:"      + amapLocation.getErrorCode() + ", errInfo:"      + amapLocation.getErrorInfo());    Toast.makeText(getApplicationContext(), "定位失败", Toast.LENGTH_LONG).show();   }  } } //自定义一个图钉，并且设置图标，当我们点击图钉时，显示设置的信息 private MarkerOptions getMarkerOptions(AMapLocation amapLocation) {   //设置图钉选项  MarkerOptions options = new MarkerOptions();  //图标  options.icon(BitmapDescriptorFactory.fromResource(R.mipmap.fire));  //位置  options.position(new LatLng(amapLocation.getLatitude(), amapLocation.getLongitude()));  StringBuffer buffer = new StringBuffer();  buffer.append(amapLocation.getCountry() + "" + amapLocation.getProvince() + "" + amapLocation.getCity() + "" + amapLocation.getDistrict() + "" + amapLocation.getStreet() + "" + amapLocation.getStreetNum());  //标题  options.title(buffer.toString());  //子标题  options.snippet("这里好火");  //设置多少帧刷新一次图片资源  options.period(60);  return options; } //激活定位 @Override public void activate(OnLocationChangedListener listener) {  mListener = listener; } //停止定位 @Override public void deactivate() {  mListener = null; } /**  * 方法必须重写  */ @Override protected void onResume() {  super.onResume();  mapView.onResume(); } /**  * 方法必须重写  */ @Override protected void onPause() {  super.onPause();  mapView.onPause(); } /**  * 方法必须重写  */ @Override protected void onSaveInstanceState(Bundle outState) {  super.onSaveInstanceState(outState);  mapView.onSaveInstanceState(outState); } /**  * 方法必须重写  */ @Override protected void onDestroy() {  super.onDestroy();  mapView.onDestroy(); }}

public class MainActivity extends AppCompatActivity implements AMap.OnMapLongClickListener, AMap.OnMapScreenShotListener, LocationSource, AMapLocationListener

 /**  * 长按地图进行截屏  *  * @param latLng  */ @Override public void onMapLongClick(LatLng latLng) {  // 设置截屏监听接口，截取地图可视区域  // 需要传入一个 AMap.OnMapLongClickListener 接口的实现者  aMap.getMapScreenShot(this); } /**  * 截屏回调方法 保存截图  */ @Override public void onMapScreenShot(Bitmap bitmap) {  SimpleDateFormat sdf = new SimpleDateFormat("yyyyMMddHHmmss");  try {   // 保存在SD卡根目录下，图片为png格式。   FileOutputStream fos = new FileOutputStream(     Environment.getExternalStorageDirectory() + "/test_"       + sdf.format(new Date()) + ".png");   boolean b = bitmap.compress(Bitmap.CompressFormat.PNG, 100, fos);   try {    fos.flush();   } catch (IOException e) {    e.printStackTrace();   }   try {    fos.close();   } catch (IOException e) {    e.printStackTrace();   }   if (b)    Toast.makeText(MainActivity.this, "截屏成功", Toast.LENGTH_LONG).show();   else {    Toast.makeText(MainActivity.this, "截屏失败", Toast.LENGTH_LONG).show();   }  } catch (FileNotFoundException e) {   e.printStackTrace();  } }