Android百度地图之添加覆盖物并响应事件

本文中将介绍在百度地图上添加覆盖物的功能、响应点击功能和弹出pop功能，代码来自百度Demo：

Activity：

package com.home;    import java.util.ArrayList;    import android.app.Activity;  import android.graphics.Bitmap;  import android.graphics.drawable.Drawable;  import android.os.Bundle;  import android.view.View;  import android.widget.Button;  import android.widget.TextView;    import com.baidu.mapapi.BMapManager;  import com.baidu.mapapi.map.ItemizedOverlay;  import com.baidu.mapapi.map.MapController;  import com.baidu.mapapi.map.MapView;  import com.baidu.mapapi.map.OverlayItem;  import com.baidu.mapapi.map.PopupClickListener;  import com.baidu.mapapi.map.PopupOverlay;  import com.baidu.platform.comapi.basestruct.GeoPoint;    /**   * 演示覆盖物的用法   */  public class OverlayActivity extends Activity {     /**    * MapView 是地图主控件    */   private MapView mMapView = null;   /**    * 用MapController完成地图控制    */   private MapController mMapController = null;   private MyOverlay mOverlay = null;   private PopupOverlay pop = null;   private ArrayList<OverlayItem> mItems = null;   private TextView popupText = null;   private View viewCache = null;   private View popupInfo = null;   private View popupLeft = null;   private View popupRight = null;   private Button button = null;   private MapView.LayoutParams layoutParam = null;   private OverlayItem mCurItem = null;   /**    * overlay 位置坐标    */   double mLon1 = 116.400244;   double mLat1 = 39.963175;   double mLon2 = 116.369199;   double mLat2 = 39.942821;   double mLon3 = 116.425541;   double mLat3 = 39.939723;   double mLon4 = 116.401394;   double mLat4 = 39.906965;   double mLon5 = 116.402096;   double mLat5 = 39.942057;     @Override   public void onCreate(Bundle savedInstanceState) {    super.onCreate(savedInstanceState);    /**     * 使用地图sdk前需先初始化BMapManager. BMapManager是全局的，可为多个MapView共用，它需要地图模块创建前创建，     * 并在地图地图模块销毁后销毁，只要还有地图模块在使用，BMapManager就不应该销毁     */    DemoApplication app = (DemoApplication) this.getApplication();    if (app.mBMapManager == null) {     app.mBMapManager = new BMapManager(this);     /**      * 如果BMapManager没有初始化则初始化BMapManager      */     app.mBMapManager.init(DemoApplication.strKey,       new DemoApplication.MyGeneralListener());    }    /**     * 由于MapView在setContentView()中初始化,所以它需要在BMapManager初始化之后     */    setContentView(R.layout.activity_overlay);    mMapView = (MapView) findViewById(R.id.bmapView);    /**     * 获取地图控制器     */    mMapController = mMapView.getController();    /**     * 设置地图是否响应点击事件 .     */    mMapController.enableClick(true);    /**     * 设置地图缩放级别     */    mMapController.setZoom(14);    /**     * 显示内置缩放控件     */    mMapView.setBuiltInZoomControls(true);      initOverlay();      /**     * 设定地图中心点     */    GeoPoint p = new GeoPoint((int) (mLat5 * 1E6), (int) (mLon5 * 1E6));    mMapController.setCenter(p);   }     public void initOverlay() {    /**     * 创建自定义overlay     */    mOverlay = new MyOverlay(getResources().getDrawable(      R.drawable.icon_marka), mMapView);    /**     * 准备overlay 数据     */    GeoPoint p1 = new GeoPoint((int) (mLat1 * 1E6), (int) (mLon1 * 1E6));    OverlayItem item1 = new OverlayItem(p1, "覆盖物1", "");    /**     * 设置overlay图标，如不设置，则使用创建ItemizedOverlay时的默认图标.     */    item1.setMarker(getResources().getDrawable(R.drawable.icon_marka));      GeoPoint p2 = new GeoPoint((int) (mLat2 * 1E6), (int) (mLon2 * 1E6));    OverlayItem item2 = new OverlayItem(p2, "覆盖物2", "");    item2.setMarker(getResources().getDrawable(R.drawable.icon_markb));      GeoPoint p3 = new GeoPoint((int) (mLat3 * 1E6), (int) (mLon3 * 1E6));    OverlayItem item3 = new OverlayItem(p3, "覆盖物3", "");    item3.setMarker(getResources().getDrawable(R.drawable.icon_markc));      GeoPoint p4 = new GeoPoint((int) (mLat4 * 1E6), (int) (mLon4 * 1E6));    OverlayItem item4 = new OverlayItem(p4, "覆盖物4", "");    item4.setMarker(getResources().getDrawable(R.drawable.icon_markd));      GeoPoint p5 = new GeoPoint((int) (mLat5 * 1E6), (int) (mLon5 * 1E6));    OverlayItem item5 = new OverlayItem(p5, "覆盖物5", "");    item5.setMarker(getResources().getDrawable(R.drawable.icon_gcoding));    /**     * 将item 添加到overlay中 注意： 同一个item只能add一次     */    mOverlay.addItem(item1);    mOverlay.addItem(item2);    mOverlay.addItem(item3);    mOverlay.addItem(item4);    mOverlay.addItem(item5);    /**     * 保存所有item，以便overlay在reset后重新添加     */    mItems = new ArrayList<OverlayItem>();    mItems.addAll(mOverlay.getAllItem());    /**     * 将overlay 添加至MapView中     */    mMapView.getOverlays().add(mOverlay);    /**     * 刷新地图     */    mMapView.refresh();      /**     * 向地图添加自定义View.     */    viewCache = getLayoutInflater()      .inflate(R.layout.custom_text_view, null);    popupInfo = (View) viewCache.findViewById(R.id.popinfo);    popupLeft = (View) viewCache.findViewById(R.id.popleft);    popupRight = (View) viewCache.findViewById(R.id.popright);    popupText = (TextView) viewCache.findViewById(R.id.textcache);      button = new Button(this);    button.setBackgroundResource(R.drawable.popup);      /**     * 创建一个popupoverlay     */    PopupClickListener popListener = new PopupClickListener() {     @Override     public void onClickedPopup(int index) {      if (index == 0) {       // 更新item位置       pop.hidePop();       GeoPoint p = new GeoPoint(mCurItem.getPoint()         .getLatitudeE6() + 5000, mCurItem.getPoint()         .getLongitudeE6() + 5000);       mCurItem.setGeoPoint(p);       mOverlay.updateItem(mCurItem);       mMapView.refresh();      } else if (index == 2) {       // 更新图标       mCurItem.setMarker(getResources().getDrawable(         R.drawable.nav_turn_via_1));       mOverlay.updateItem(mCurItem);       mMapView.refresh();      }     }    };    pop = new PopupOverlay(mMapView, popListener);   }     /**    * 清除所有Overlay    *     * @param view    */   public void clearOverlay(View view) {    mOverlay.removeAll();    if (pop != null) {     pop.hidePop();    }    mMapView.removeView(button);    mMapView.refresh();   }     /**    * 重新添加Overlay    *     * @param view    */   public void resetOverlay(View view) {    clearOverlay(null);    // 重新add overlay    mOverlay.addItem(mItems);    mMapView.refresh();   }     @Override   protected void onPause() {    /**     * MapView的生命周期与Activity同步，当activity挂起时需调用MapView.onPause()     */    mMapView.onPause();    super.onPause();   }     @Override   protected void onResume() {    /**     * MapView的生命周期与Activity同步，当activity恢复时需调用MapView.onResume()     */    mMapView.onResume();    super.onResume();   }     @Override   protected void onDestroy() {    /**     * MapView的生命周期与Activity同步，当activity销毁时需调用MapView.destroy()     */    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);   }     public class MyOverlay extends ItemizedOverlay {      public MyOverlay(Drawable defaultMarker, MapView mapView) {     super(defaultMarker, mapView);    }      @Override    public boolean onTap(int index) {     OverlayItem item = getItem(index);     mCurItem = item;     if (index == 4) {      button.setText("这是一个系统控件");      GeoPoint pt = new GeoPoint((int) (mLat5 * 1E6),        (int) (mLon5 * 1E6));      // 创建布局参数      layoutParam = new MapView.LayoutParams(      // 控件宽,继承自ViewGroup.LayoutParams        MapView.LayoutParams.WRAP_CONTENT,        // 控件高,继承自ViewGroup.LayoutParams        MapView.LayoutParams.WRAP_CONTENT,        // 使控件固定在某个地理位置        pt, 0, -32,        // 控件对齐方式        MapView.LayoutParams.BOTTOM_CENTER);      // 添加View到MapView中      mMapView.addView(button, layoutParam);     } else {      popupText.setText(getItem(index).getTitle());      Bitmap[] bitMaps = { BMapUtil.getBitmapFromView(popupLeft),        BMapUtil.getBitmapFromView(popupInfo),        BMapUtil.getBitmapFromView(popupRight) };      pop.showPopup(bitMaps, item.getPoint(), 32);     }     return true;    }      @Override    public boolean onTap(GeoPoint pt, MapView mMapView) {     if (pop != null) {      pop.hidePop();      mMapView.removeView(button);     }     return false;    }     }    }

地图工具类（BMapUtil）同上文。
custom_text_view.xml同上文。

配置文件及Application类均与之前的一样。

布局文件：

<?xml version="1.0" encoding="utf-8"?>  <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"      android:layout_width="match_parent"      android:layout_height="match_parent"      android:orientation="vertical" >        <LinearLayout          android:layout_width="match_parent"          android:layout_height="wrap_content"          android:orientation="horizontal" >            <Button              android:id="@+id/clear"              android:layout_width="match_parent"              android:layout_height="match_parent"              android:layout_marginBottom="2dip"              android:layout_marginLeft="2dip"              android:layout_marginRight="2dip"              android:layout_marginTop="2dip"              android:layout_weight="1"              android:background="@drawable/button_style"              android:onClick="clearOverlay"              android:padding="10dip"              android:text="清除(clear)" />            <Button              android:id="@+id/resert"              android:layout_width="match_parent"              android:layout_height="match_parent"              android:layout_marginBottom="2dip"              android:layout_marginLeft="2dip"              android:layout_marginRight="2dip"              android:layout_marginTop="2dip"              android:layout_weight="1"              android:background="@drawable/button_style"              android:onClick="resetOverlay"              android:text="重置(reset)" />      </LinearLayout>        <com.baidu.mapapi.map.MapView          android:id="@+id/bmapView"          android:layout_width="match_parent"          android:layout_height="match_parent"          android:clickable="true" />    </LinearLayout>

附上图片效果：

来自：http://blog.csdn.net/u010142437/article/details/11578221