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在使用百度地图结合GPS进行定位一文中,我们已经介绍了利用GPS结合百度地图进行定位,另外我们也可以使用百度SDK里面集成的方法,直接进行定位,这样就不需要我们自己去写GPS定位的方法了,代码原型来自百度Demo,代码如下:
Activity:
package com.home;
import android.app.Activity;
import android.content.Context;
import android.graphics.drawable.Drawable;
import android.os.Bundle;
import android.util.AttributeSet;
import android.util.Log;
import android.view.Menu;
import android.view.MotionEvent;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.RadioGroup;
import android.widget.TextView;
import android.widget.Toast;
import android.widget.RadioGroup.OnCheckedChangeListener;
import com.baidu.location.BDLocation;
import com.baidu.location.BDLocationListener;
import com.baidu.location.LocationClient;
import com.baidu.location.LocationClientOption;
import com.baidu.mapapi.map.LocationData;
import com.baidu.mapapi.map.MapController;
import com.baidu.mapapi.map.MapView;
import com.baidu.mapapi.map.MyLocationOverlay;
import com.baidu.mapapi.map.PopupClickListener;
import com.baidu.mapapi.map.PopupOverlay;
import com.baidu.platform.comapi.basestruct.GeoPoint;
/**
* 此demo用来展示如何结合定位SDK实现定位,并使用MyLocationOverlay绘制定位位置 同时展示如何使用自定义图标绘制并点击时弹出泡泡
*
*/
public class LocationOverlayActivity extends Activity {
// 定位相关
LocationClient mLocClient;
LocationData locData = null;
public MyLocationListenner myListener = new MyLocationListenner();
// 定位图层
locationOverlay myLocationOverlay = null;
// 弹出泡泡图层
private PopupOverlay pop = null;// 弹出泡泡图层,浏览节点时使用
private TextView popupText = null;// 泡泡view
private View viewCache = null;
// 地图相关,使用继承MapView的MyLocationMapView目的是重写touch事件实现泡泡处理
// 如果不处理touch事件,则无需继承,直接使用MapView即可
MyLocationMapView mMapView = null; // 地图View
private MapController mMapController = null;
// UI相关
OnCheckedChangeListener radioButtonListener = null;
Button requestLocButton = null;
boolean isRequest = false;// 是否手动触发请求定位
boolean isFirstLoc = true;// 是否首次定位
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_locationoverlay);
CharSequence titleLable = "定位功能";
setTitle(titleLable);
requestLocButton = (Button) findViewById(R.id.button1);
OnClickListener btnClickListener = new OnClickListener() {
@Override
public void onClick(View v) {
// 手动定位请求
requestLocClick();
}
};
requestLocButton.setOnClickListener(btnClickListener);
RadioGroup group = (RadioGroup) this.findViewById(R.id.radioGroup);
radioButtonListener = new OnCheckedChangeListener() {
@Override
public void onCheckedChanged(RadioGroup group, int checkedId) {
if (checkedId == R.id.defaulticon) {
// 传入null则,恢复默认图标
modifyLocationOverlayIcon(null);
}
if (checkedId == R.id.customicon) {
// 修改为自定义marker
modifyLocationOverlayIcon(getResources().getDrawable(
R.drawable.icon_geo));
}
}
};
group.setOnCheckedChangeListener(radioButtonListener);
// 地图初始化
mMapView = (MyLocationMapView) findViewById(R.id.bmapView);
mMapController = mMapView.getController();
mMapView.getController().setZoom(14);
mMapView.getController().enableClick(true);
mMapView.setBuiltInZoomControls(true);
// 创建 弹出泡泡图层
createPaopao();
// 定位初始化
mLocClient = new LocationClient(this);
locData = new LocationData();
mLocClient.registerLocationListener(myListener);
LocationClientOption option = new LocationClientOption();
option.setOpenGps(true);// 打开gps
option.setCoorType("bd09ll"); // 设置坐标类型
option.setScanSpan(5000);
mLocClient.setLocOption(option);
mLocClient.start();
// 定位图层初始化
myLocationOverlay = new locationOverlay(mMapView);
// 设置定位数据
myLocationOverlay.setData(locData);
// 添加定位图层
mMapView.getOverlays().add(myLocationOverlay);
myLocationOverlay.enableCompass();
// 修改定位数据后刷新图层生效
mMapView.refresh();
}
/**
* 手动触发一次定位请求
*/
public void requestLocClick() {
isRequest = true;
mLocClient.requestLocation();
Toast.makeText(LocationOverlayActivity.this, "正在定位……",
Toast.LENGTH_SHORT).show();
}
/**
* 修改位置图标
*
* @param marker
*/
public void modifyLocationOverlayIcon(Drawable marker) {
// 当传入marker为null时,使用默认图标绘制
myLocationOverlay.setMarker(marker);
// 修改图层,需要刷新MapView生效
mMapView.refresh();
}
/**
* 创建弹出泡泡图层
*/
public void createPaopao() {
viewCache = getLayoutInflater()
.inflate(R.layout.custom_text_view, null);
popupText = (TextView) viewCache.findViewById(R.id.textcache);
// 泡泡点击响应回调
PopupClickListener popListener = new PopupClickListener() {
@Override
public void onClickedPopup(int index) {
Log.v("click", "clickapoapo");
}
};
pop = new PopupOverlay(mMapView, popListener);
MyLocationMapView.pop = pop;
}
/**
* 定位SDK监听函数
*/
public class MyLocationListenner implements BDLocationListener {
@Override
public void onReceiveLocation(BDLocation location) {
if (location == null)
return;
locData.latitude = location.getLatitude();
locData.longitude = location.getLongitude();
// 如果不显示定位精度圈,将accuracy赋值为0即可
locData.accuracy = location.getRadius();
locData.direction = location.getDerect();
// 更新定位数据
myLocationOverlay.setData(locData);
// 更新图层数据执行刷新后生效
mMapView.refresh();
// 是手动触发请求或首次定位时,移动到定位点
if (isRequest || isFirstLoc) {
// 移动地图到定位点
mMapController.animateTo(new GeoPoint(
(int) (locData.latitude * 1e6),
(int) (locData.longitude * 1e6)));
isRequest = false;
}
// 首次定位完成
isFirstLoc = false;
}
public void onReceivePoi(BDLocation poiLocation) {
if (poiLocation == null) {
return;
}
}
}
// 继承MyLocationOverlay重写dispatchTap实现点击处理
public class locationOverlay extends MyLocationOverlay {
public locationOverlay(MapView mapView) {
super(mapView);
}
@Override
protected boolean dispatchTap() {
// 处理点击事件,弹出泡泡
popupText.setBackgroundResource(R.drawable.popup);
popupText.setText("我的位置");
pop.showPopup(BMapUtil.getBitmapFromView(popupText), new GeoPoint(
(int) (locData.latitude * 1e6),
(int) (locData.longitude * 1e6)), 8);
return true;
}
}
@Override
protected void onPause() {
mMapView.onPause();
super.onPause();
}
@Override
protected void onResume() {
mMapView.onResume();
super.onResume();
}
@Override
protected void onDestroy() {
// 退出时销毁定位
if (mLocClient != null)
mLocClient.stop();
mMapView.destroy();
super.onDestroy();
}
@Override
protected void onSaveInstanceState(Bundle outState) {
super.onSaveInstanceState(outState);
mMapView.onSaveInstanceState(outState);
}
@Override
protected void onRestoreInstanceState(Bundle savedInstanceState) {
super.onRestoreInstanceState(savedInstanceState);
mMapView.onRestoreInstanceState(savedInstanceState);
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
return true;
}
}
/**
* 继承MapView重写onTouchEvent实现泡泡处理操作
*
* @author Administrator
*
*/
class MyLocationMapView extends MapView {
static PopupOverlay pop = null;// 弹出泡泡图层,点击图标使用
public MyLocationMapView(Context context) {
super(context);
}
public MyLocationMapView(Context context, AttributeSet attrs) {
super(context, attrs);
}
public MyLocationMapView(Context context, AttributeSet attrs, int defStyle) {
super(context, attrs, defStyle);
}
@Override
public boolean onTouchEvent(MotionEvent event) {
if (!super.onTouchEvent(event)) {
// 消隐泡泡
if (pop != null && event.getAction() == MotionEvent.ACTION_UP)
pop.hidePop();
}
return true;
}
}
地图工具类:
package com.home;
import android.graphics.Bitmap;
import android.view.View;
public class BMapUtil {
/**
* 从view 得到图片
*
* @param view
* @return
*/
public static Bitmap getBitmapFromView(View view) {
view.destroyDrawingCache();
view.measure(View.MeasureSpec.makeMeasureSpec(0,
View.MeasureSpec.UNSPECIFIED), View.MeasureSpec
.makeMeasureSpec(0, View.MeasureSpec.UNSPECIFIED));
view.layout(0, 0, view.getMeasuredWidth(), view.getMeasuredHeight());
view.setDrawingCacheEnabled(true);
Bitmap bitmap = view.getDrawingCache(true);
return bitmap;
}
}
配置文件:
注意:该配置文件与之前的有个区别,多了一个service,它是百度jar包下的一个服务类,这是定位必须要的,不然就不能定位。
Application类同之前一样。
布局文件:
custom_text_view.xml:
附上图片效果: