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();
        }
    }