Android高德地图开发 地图事件

/**
* AMapV1地图中简单介绍OnMapClickListener, OnMapLongClickListener,
* OnCameraChangeListener三种监听器用法
*/

public class EventsActivity extends Activity implements OnMapClickListener,
OnMapLongClickListener, OnCameraChangeListener {
private AMap aMap;
private MapView mapView;
private TextView mTapTextView;
private TextView mCameraTextView;

@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.events_activity);
mapView = (MapView) findViewById(R.id.map);
mapView.onCreate(savedInstanceState);// 此方法必须重写
init();
}

/**
* 初始化AMap对象
*/
private void init() {
if (aMap == null) {
aMap = mapView.getMap();
setUpMap();
}
mTapTextView = (TextView) findViewById(R.id.tap_text);
mCameraTextView = (TextView) findViewById(R.id.camera_text);
}

/**
* amap添加一些事件监听器
*/
private void setUpMap() {
aMap.setOnMapClickListener(this);// 对amap添加单击地图事件监听器
aMap.setOnMapLongClickListener(this);// 对amap添加长按地图事件监听器
aMap.setOnCameraChangeListener(this);// 对amap添加移动地图事件监听器
}

/**
* 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();
}

/**
* 对单击地图事件回调
*/
@Override
public void onMapClick(LatLng point) {
mTapTextView.setText("tapped, point=" + point);
}

/**
* 对长按地图事件回调
*/
@Override
public void onMapLongClick(LatLng point) {
mTapTextView.setText("long pressed, point=" + point);
}

/**
* 对正在移动地图事件回调
*/
@Override
public void onCameraChange(CameraPosition cameraPosition) {
mCameraTextView.setText("onCameraChange:" + cameraPosition.toString());
}

/**
* 对移动地图结束事件回调
*/
@Override
public void onCameraChangeFinish(CameraPosition cameraPosition) {
mCameraTextView.setText("onCameraChangeFinish:"
+ cameraPosition.toString());
VisibleRegion visibleRegion = aMap.getProjection().getVisibleRegion(); // 获取可视区域、

LatLngBounds latLngBounds = visibleRegion.latLngBounds;// 获取可视区域的Bounds
boolean isContain = latLngBounds.contains(Constants.SHANGHAI);// 判断上海经纬度是否包括在当前地图可见区域
if (isContain) {
ToastUtil.show(EventsActivity.this, "上海市在地图当前可见区域内");
} else {
ToastUtil.show(EventsActivity.this, "上海市超出地图当前可见区域");
}
}
}

/**
* 计算一组数据中的最小
* @param distances
* @return
*/
double comDistance(double[] distances) {
int size = distances.length;
for (int a = 1; a < size; a++) {
Log.d("hjb 各省距离中心点--", distances[a]+"");
for (int b = 0; b < size - a; b++) {
if (distances[b] > distances[b + 1]) {
double temp = distances[b];
distances[b] = distances[b + 1];
distances[b + 1] = temp;
}
}
}
Log.d("hjb ", "max: " + distances[size-1] + "  min: " + distances[0]);
return distances[0];
}

/**
* 求出地图上某地与地图可视化区域内中心点的直线距离 ，米
* @param city
* @return
*/
private double distance(LatLng city) {
// TODO Auto-generated method stub
// 获取当前地图中心点的坐标
LatLng mTarget = mAMap.getCameraPosition().target;

Log.d("hjb mTarget--", mTarget.toString());
Log.d("hjb city--", city.toString());
Log.d("hjb 距离中心点--", KitLocationUtil.gps2m(mTarget.latitude, mTarget.longitude, city.latitude, city.longitude)+"米");
return KitLocationUtil.gps2m(mTarget.latitude, mTarget.longitude, city.latitude, city.longitude);
}