Android 基于高德地图实现发送地理位置功能

开发教程
2016年5月31日

实现方式：

1、注册高德地图开发者账号,创建应用、获取高德地图的 appkey
2、jar 包建议直接从融云 demo 中拷贝。因为某地图厂商的版本兼容做的不好。可能你下载的新版本的 jar. 在老版本的实现代码中就找不到这个接口，或者那个接口变动了。

3、参考 demo 代码在 RongCloudEvent.java 上实现了地理位置提供者接口。 onStartLocation 方法中点击开启地图的 Activity

@Override
public void onStartLocation(Context context, LocationCallback locationCallback) {
/**
* demo 代码开发者需替换成自己的代码。 */
           DemoContext.getInstance().setLastLocationCallback(locationCallback);
Intent intent = new Intent(context, AMAPLocationActivity.class); intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK); context.startActivity(intent);

AMAPLocationActivity 为核心逻辑类。高德地图的展示获取经纬度和定位的逻辑全在此处。

Code:

public class AMAPLocationActivity extends ActionBarActivity implements View.OnClickListener, LocationSource, GeocodeSearch.OnGeocodeSearchListener, AMapLocationListener, AMap.OnCameraChangeListener {

    private MapView mapView;
    private AMap aMap;
    private LocationManagerProxy mLocationManagerProxy;
    private Handler handler = new Handler();
    private LocationSource.OnLocationChangedListener listener;
    private LatLng myLocation = null;
    private Marker centerMarker;
    private boolean isMovingMarker = false;
    private BitmapDescriptor successDescripter;
    private GeocodeSearch geocodeSearch;
    private LocationMessage mMsg;
    private TextView tvCurLocation;
    private boolean model = false;
    private boolean isPerview;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_amap);
        getSupportActionBar().setTitle("地理位置");
        getSupportActionBar().setDisplayHomeAsUpEnabled(true);
        getSupportActionBar().setHomeAsUpIndicator(R.drawable.de_actionbar_back);
        mapView = (MapView) findViewById(R.id.map);
        mapView.onCreate(savedInstanceState);


        initUI();
        initAmap();
        setUpLocationStyle();
    }

    private void initAmap() {
        if (aMap == null) {
            aMap = mapView.getMap();
        }

        if (getIntent().hasExtra("location")) {
            isPerview = true;
            mMsg = getIntent().getParcelableExtra("location");
            tvCurLocation.setVisibility(View.GONE);
            returns.setVisibility(View.GONE);

            if (model) {
                CameraPosition location = new CameraPosition.Builder()
                        .target(new LatLng(mMsg.getLat(), mMsg.getLng())).zoom(18).bearing(0).tilt(30).build();
                show(location);
            } else {
                aMap.addMarker(new MarkerOptions().anchor(0.5f, 0.5f)
                        .position(new LatLng(mMsg.getLat(), mMsg.getLng())).title(mMsg.getPoi())
                        .snippet(mMsg.getLat() + "," + mMsg.getLng()).draggable(false));
            }
            return;
        }


        aMap.setLocationSource(this);// 设置定位监听
        aMap.setMyLocationEnabled(true);
        aMap.getUiSettings().setZoomControlsEnabled(false);
        aMap.getUiSettings().setMyLocationButtonEnabled(false);
        CameraUpdate cameraUpdate = CameraUpdateFactory.zoomTo(15);//设置缩放监听
        aMap.moveCamera(cameraUpdate);

        successDescripter = BitmapDescriptorFactory.fromResource(R.drawable.icon_usecarnow_position_succeed);
        geocodeSearch = new GeocodeSearch(this);
        geocodeSearch.setOnGeocodeSearchListener(this);
    }

    private static final String MAP_FRAGMENT_TAG = "map";
    private SupportMapFragment aMapFragment;


    private void show(CameraPosition location) {
        AMapOptions aOptions = new AMapOptions();
        aOptions.zoomGesturesEnabled(true);
        aOptions.scrollGesturesEnabled(false);

        aOptions.camera(location);

        if (aMapFragment == null) {
            aMapFragment = SupportMapFragment.newInstance(aOptions);
            FragmentTransaction fragmentTransaction = getSupportFragmentManager()
                    .beginTransaction();
            fragmentTransaction.add(android.R.id.content, aMapFragment,
                    MAP_FRAGMENT_TAG);
            fragmentTransaction.commit();
        }
    }

    private ImageView returns;

    private void initUI() {
        returns = (ImageView) findViewById(R.id.myLocation);
        returns.setOnClickListener(this);
        tvCurLocation = (TextView) findViewById(R.id.location);
    }


    @Override
    public void onClick(View v) {
        switch (v.getId()) {
            case R.id.myLocation:
                CameraUpdate update = CameraUpdateFactory.changeLatLng(myLocation);
                aMap.animateCamera(update);
                break;
            default:
                break;
        }
    }

    @Override
    public void activate(OnLocationChangedListener onLocationChangedListener) {
        listener = onLocationChangedListener;
        mLocationManagerProxy = LocationManagerProxy.getInstance(this);
        mLocationManagerProxy.requestLocationData(
                LocationProviderProxy.AMapNetwork, -1, 100, this);
    }

    @Override
    public void deactivate() {
        if (mLocationManagerProxy != null) {
            mLocationManagerProxy.removeUpdates(this);
            mLocationManagerProxy.destroy();
        }
        mLocationManagerProxy = null;
    }

    @Override
    public void onRegeocodeSearched(RegeocodeResult regeocodeResult, int i) {
        if (i == 0) {
            if (regeocodeResult != null && regeocodeResult.getRegeocodeAddress() != null) {
                endAnim();
                centerMarker.setIcon(successDescripter);
                RegeocodeAddress regeocodeAddress = regeocodeResult.getRegeocodeAddress();
                String formatAddress = regeocodeResult.getRegeocodeAddress().getFormatAddress();
                String shortAdd = formatAddress.replace(regeocodeAddress.getProvince(), "").replace(regeocodeAddress.getCity(), "").replace(regeocodeAddress.getDistrict(), "");
                tvCurLocation.setText(shortAdd);
                double latitude = regeocodeResult.getRegeocodeQuery().getPoint().getLatitude();
                double longitude = regeocodeResult.getRegeocodeQuery().getPoint().getLongitude();
                mMsg = LocationMessage.obtain(latitude, longitude, shortAdd, getMapUrl(latitude, longitude));
                NLog.e("LocationChange", shortAdd + latitude + "----" + longitude);
            } else {
                NToast.shortToast(AMAPLocationActivity.this, "没有搜索到结果");
            }
        } else {
            NToast.shortToast(AMAPLocationActivity.this, "搜索失败,请检查网络");
        }
    }

    @Override
    public void onGeocodeSearched(GeocodeResult geocodeResult, int i) {

    }


    @Override
    public void onLocationChanged(AMapLocation aMapLocation) {
        if (aMapLocation != null && aMapLocation.getAMapException().getErrorCode() == 0) {
            if (listener != null) {
                listener.onLocationChanged(aMapLocation);// 显示系统小蓝点
            }
            myLocation = new LatLng(aMapLocation.getLatitude(), aMapLocation.getLongitude());//获取当前位置经纬度
            tvCurLocation.setText(aMapLocation.getRoad() + aMapLocation.getStreet() + aMapLocation.getPoiName());//当前位置信息

            double latitude = aMapLocation.getLatitude();
            double longitude = aMapLocation.getLongitude();
            mMsg = LocationMessage.obtain(latitude, longitude, aMapLocation.getRoad() + aMapLocation.getStreet() + aMapLocation.getPoiName(), getMapUrl(latitude, longitude));
            NLog.e("LocationInit", aMapLocation.getRoad() + aMapLocation.getStreet() + aMapLocation.getPoiName() + latitude + "----" + longitude);


            addChooseMarker();
        }
    }

    private void addChooseMarker() {
        //加入自定义标签
        MarkerOptions centerMarkerOption = new MarkerOptions().position(myLocation).icon(successDescripter);
        centerMarker = aMap.addMarker(centerMarkerOption);
        centerMarker.setPositionByPixels(mapView.getWidth() / 2, mapView.getHeight() / 2);
        handler.postDelayed(new Runnable() {
            @Override
            public void run() {
                CameraUpdate update = CameraUpdateFactory.zoomTo(17f);
                aMap.animateCamera(update, 1000, new AMap.CancelableCallback() {
                    @Override
                    public void onFinish() {
                        aMap.setOnCameraChangeListener(AMAPLocationActivity.this);
                    }

                    @Override
                    public void onCancel() {
                    }
                });
            }
        }, 1000);
    }

    private void setMovingMarker() {
        if (isMovingMarker)
            return;

        isMovingMarker = true;
        centerMarker.setIcon(successDescripter);
        hideLocationView();
    }


    @Override
    public void onCameraChange(CameraPosition cameraPosition) {
        if (centerMarker != null) {
            setMovingMarker();
        }
    }

    @Override
    public void onCameraChangeFinish(CameraPosition cameraPosition) {
        LatLonPoint point = new LatLonPoint(cameraPosition.target.latitude, cameraPosition.target.longitude);
        RegeocodeQuery query = new RegeocodeQuery(point, 50, GeocodeSearch.AMAP);
        geocodeSearch.getFromLocationAsyn(query);
        if (centerMarker != null) {
            animMarker();
        }
        showLocationView();
    }


    @Override
    public void onLocationChanged(Location location) {

    }

    @Override
    public void onStatusChanged(String provider, int status, Bundle extras) {

    }

    @Override
    public void onProviderEnabled(String provider) {

    }

    @Override
    public void onProviderDisabled(String provider) {

    }


    @Override
    protected void onResume() {
        super.onResume();
        mapView.onResume();
    }

    @Override
    protected void onPause() {
        super.onPause();
        mapView.onPause();
        deactivate();
    }

    @Override
    protected void onSaveInstanceState(Bundle outState) {
        super.onSaveInstanceState(outState);
        mapView.onSaveInstanceState(outState);
    }

    @Override
    protected void onDestroy() {
        mapView.onDestroy();
        super.onDestroy();
    }

    private ValueAnimator animator = null;

    private void animMarker() {
        isMovingMarker = false;
        if (animator != null) {
            animator.start();
            return;
        }
        animator = ValueAnimator.ofFloat(mapView.getHeight() / 2, mapView.getHeight() / 2 - 30);
        animator.setInterpolator(new DecelerateInterpolator());
        animator.setDuration(150);
        animator.setRepeatCount(1);
        animator.setRepeatMode(ValueAnimator.REVERSE);
        animator.addUpdateListener(new ValueAnimator.AnimatorUpdateListener() {
            @Override
            public void onAnimationUpdate(ValueAnimator animation) {
                Float value = (Float) animation.getAnimatedValue();
                centerMarker.setPositionByPixels(mapView.getWidth() / 2, Math.round(value));
            }
        });
        animator.addListener(new AnimatorListenerAdapter() {
            @Override
            public void onAnimationEnd(Animator animation) {
                centerMarker.setIcon(successDescripter);
            }
        });
        animator.start();
    }

    private void endAnim() {
        if (animator != null && animator.isRunning())
            animator.end();
    }

    private void hideLocationView() {
        ObjectAnimator animLocation = ObjectAnimator.ofFloat(tvCurLocation, "TranslationY", -tvCurLocation.getHeight() * 2);
        animLocation.setDuration(200);
        animLocation.start();
    }

    private void showLocationView() {
        ObjectAnimator animLocation = ObjectAnimator.ofFloat(tvCurLocation, "TranslationY", 0);
        animLocation.setDuration(200);
        animLocation.start();
    }

    private void setUpLocationStyle() {
        // 自定义系统定位蓝点
        MyLocationStyle myLocationStyle = new MyLocationStyle();
        myLocationStyle.myLocationIcon(BitmapDescriptorFactory.
                fromResource(R.drawable.img_location_now));
        myLocationStyle.strokeWidth(0);
        myLocationStyle.strokeColor(R.color.main_theme_color);
        myLocationStyle.radiusFillColor(Color.TRANSPARENT);
        aMap.setMyLocationStyle(myLocationStyle);
    }

    private Uri getMapUrl(double x, double y) {
        String url = "http://restapi.amap.com/v3/staticmap?location=" + y + "," + x +
                "&zoom=17&scale=2&size=150*150&markers=mid,,A:" + y + ","
                + x + "&key=" + "ee95e52bf08006f63fd29bcfbcf21df0";
        NLog.e("getMapUrl", url);
        return Uri.parse(url);
    }

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        MenuInflater inflater = getMenuInflater();
        inflater.inflate(R.menu.de_location_menu, menu);

        if (isPerview) {
            menu.getItem(0).setVisible(false);
        }
        return super.onCreateOptionsMenu(menu);
    }

    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        switch (item.getItemId()) {
            case R.id.send_location:
                if (mMsg != null) {
                    DemoContext.getInstance().getLastLocationCallback().onSuccess(mMsg);
                    DemoContext.getInstance().setLastLocationCallback(null);
                    finish();
                } else {
                    DemoContext.getInstance().getLastLocationCallback()
                            .onFailure("定位失败");
                }
                break;
            case android.R.id.home:
                finish();
                break;
        }
        return super.onOptionsItemSelected(item);
    }
}

Xml：

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
                xmlns:tools="http://schemas.android.com/tools"
                android:layout_width="match_parent"
                android:layout_height="match_parent"
                tools:context=".MainActivity">

    <FrameLayout
        android:layout_width="match_parent"
        android:layout_height="match_parent">

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

        <TextView
            android:id="@+id/location"
            android:text="获取中……"
            android:drawableLeft="@drawable/schedule_end_icon"
            android:singleLine="true"
            android:ellipsize="end"
            android:padding="10dp"
            android:background="@drawable/bg_white"
            android:textColor="@android:color/secondary_text_light"
            android:textSize="15sp"
            android:drawablePadding="8dp"
            android:layout_margin="20dp"
            android:layout_gravity="center_horizontal"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"/>


        <ImageView
            android:id="@+id/myLocation"
            android:src="@drawable/btn_location"
            android:layout_gravity="right|bottom"
            android:layout_marginBottom="70dp"
            android:layout_marginRight="5dp"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"/>

    </FrameLayout>
</RelativeLayout>

将代码拷贝和相关资源文件拷贝以后就能实现。下面对代码逻辑做一下介绍：

代码整体分两部分一部分是发送位置逻辑一部分是从会话界面地理位置消息点击进来逻辑。主要逻辑是发送位置逻辑：

@Override
public void onLocationChanged(AMapLocation aMapLocation) {

        if (aMapLocation != null && aMapLocation.getAMapException().getErrorCode() == 0) {

如果卡在这个 if 判断没有进来那说明你配置的高德相关的 jar 、key 、storeFile(此处在 gradle 配置) 配置高德环境有问题。此处具体咨询高德地图

另外需要值得注意的一点是获取静态缩略图的问题

 private Uri getMapUrl(double x, double y) {
        String url = "http://restapi.amap.com/v3/staticmap?location=" + y + "," + x +
                "&zoom=17&scale=2&size=150*150&markers=mid,,A:" + y + ","
                + x + "&key=" + "ee95e52bf08006f63fd29bcfbcf21df0";
        NLog.e("getMapUrl", url);
        return Uri.parse(url);
    }

最后组拼的 key.在高德官网解释是说需要配置自己的高德key.这里是个坑，我拿着自己的 key 去浏览器中解析 返回错误码 10009（请求中使用的 Key 与绑定的平台不符）

当时给愁坏了。后来朋友提示随意拿个别人的 key 绑定了 web api 的去使用试试。结果还真行。所以在此处参考博文的小伙伴直接用上面 demo 提供的 key 即可。

点击地理位置消息预览的逻辑 在 RongCloudEvent.java 重写消息点击事件

if (message.getContent() instanceof LocationMessage) {
            Intent intent = new Intent(context, AMAPLocationActivity.class);
            intent.putExtra("location", message.getContent());
            intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
            context.startActivity(intent);
        }

在 AMAPLocationActivity 截取并且判断这个 intent

if (getIntent().hasExtra("location")) {
            isPerview = true;
            mMsg = getIntent().getParcelableExtra("location");
            tvCurLocation.setVisibility(View.GONE);
            returns.setVisibility(View.GONE);

            if (model) {
                CameraPosition location = new CameraPosition.Builder()
                        .target(new LatLng(mMsg.getLat(), mMsg.getLng())).zoom(18).bearing(0).tilt(30).build();
                show(location);
            } else {
                aMap.addMarker(new MarkerOptions().anchor(0.5f, 0.5f)
                        .position(new LatLng(mMsg.getLat(), mMsg.getLng())).title(mMsg.getPoi())
                        .snippet(mMsg.getLat() + "," + mMsg.getLng()).draggable(false));
            }
            return;
        }

最后的 return 不继续执行代码。完成当前位置的预览即结束