演示Android百度地图操作功能

在本文中将演示百度地图的操作功能，包括缩放，旋转，视角切换，点击，双击，长按事件触发的操作以及截图等。百度地图本来就内置有缩放，旋转功能，那么在这里，截图（其实很多手机也自带截图功能）以及点击事件的监听算是比较有实际意义的功能。代码原型来源百度demo：

Activity：

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package com.home;   import java.io.File; import java.io.FileNotFoundException; import java.io.FileOutputStream; import java.io.IOException;   import com.baidu.mapapi.BMapManager; import com.baidu.mapapi.map.MKMapTouchListener; import com.baidu.mapapi.map.MKMapViewListener; import com.baidu.mapapi.map.MapController; import com.baidu.mapapi.map.MapPoi; import com.baidu.mapapi.map.MapView; import com.baidu.platform.comapi.basestruct.GeoPoint;   import android.app.Activity; import android.graphics.Bitmap; import android.os.Bundle; import android.os.Environment; import android.view.View; import android.view.View.OnClickListener; import android.widget.Button; import android.widget.EditText; import android.widget.TextView; import android.widget.Toast;   public class ControlBMapActivity 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;     /**      * MKMapViewListener 用于处理地图事件回调      */     MKMapViewListener mMapListener = null;     /**      * 用于截获屏坐标      */     MKMapTouchListener mapTouchListener = null;     /**      * 当前地点击点      */     private GeoPoint currentPt = null;     /**      * 控制按钮      */     private Button zoomButton = null;     private Button rotateButton = null;     private Button overlookButton = null;     private Button saveScreenButton = null;     private String touchType = null;     /**      * 用于显示地图状态的面板      */     private TextView mStateTextView = null;       @Override     protected void onCreate(Bundle savedInstanceState) {         super.onCreate(savedInstanceState);         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());         }         setContentView(R.layout.control_main);         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(12);           mStateTextView = (TextView) findViewById(R.id.state);         /**          * 初始化地图事件监听          */         initListener();         /**          * 将地图默认移动至天安门          */         double cLat = 39.945;         double cLon = 116.404;         GeoPoint p = new GeoPoint((int) (cLat * 1E6), (int) (cLon * 1E6));         mMapController.setCenter(p);     }       private void initListener() {         /**          * 设置地图点击事件监听          */         mapTouchListener = new MKMapTouchListener() {             @Override             public void onMapClick(GeoPoint point) {                 touchType = "单击";                 currentPt = point;                 updateMapState();               }               @Override             public void onMapDoubleClick(GeoPoint point) {                 touchType = "双击";                 currentPt = point;                 updateMapState();             }               @Override             public void onMapLongClick(GeoPoint point) {                 touchType = "长按";                 currentPt = point;                 updateMapState();             }         };         mMapView.regMapTouchListner(mapTouchListener);         /**          * 设置地图事件监听          */         mMapListener = new MKMapViewListener() {             @Override             public void onMapMoveFinish() {                 /**                  * 在此处理地图移动完成回调 缩放，平移等操作完成后，此回调被触发                  */                 updateMapState();             }               @Override             public void onClickMapPoi(MapPoi mapPoiInfo) {                 /**                  * 在此处理底图poi点击事件 显示底图poi名称并移动至该点 设置过：                  * mMapController.enableClick(true); 时，此回调才能被触发                  *                  */               }               @Override             public void onGetCurrentMap(Bitmap b) {                 /**                  * 当调用过 mMapView.getCurrentMap()后，此回调会被触发 可在此保存截图至存储设备                  *                  */                 if (!Environment.MEDIA_MOUNTED.equals(Environment                         .getExternalStorageState())) {                     Toast.makeText(ControlBMapActivity.this, "请插入SD卡",                             Toast.LENGTH_SHORT).show();                     return;                 }                 File file = new File(Environment.getExternalStorageDirectory(),                         System.currentTimeMillis() + ".png");                 FileOutputStream out;                 try {                     out = new FileOutputStream(file);                     if (b.compress(Bitmap.CompressFormat.PNG, 70, out)) {                         out.flush();                         out.close();                     }                     Toast.makeText(ControlBMapActivity.this,                             "屏幕截图成功，图片存在: " + file.toString(),                             Toast.LENGTH_SHORT).show();                 } catch (FileNotFoundException e) {                     e.printStackTrace();                 } catch (IOException e) {                     e.printStackTrace();                 }               }               @Override             public void onMapAnimationFinish() {                 /**                  * 地图完成带动画的操作（如: animationTo()）后，此回调被触发                  */                 updateMapState();             }               @Override             public void onMapLoadFinish() {             }         };         mMapView.regMapViewListener(DemoApplication.getInstance().mBMapManager,                 mMapListener);         /**          * 设置按键监听          */         zoomButton = (Button) findViewById(R.id.zoombutton);         rotateButton = (Button) findViewById(R.id.rotatebutton);         overlookButton = (Button) findViewById(R.id.overlookbutton);         saveScreenButton = (Button) findViewById(R.id.savescreen);         OnClickListener onClickListener = new OnClickListener() {             @Override             public void onClick(View view) {                 if (view.equals(zoomButton)) {                     perfomZoom();                 } else if (view.equals(rotateButton)) {                     perfomRotate();                 } else if (view.equals(overlookButton)) {                     perfomOverlook();                 } else if (view.equals(saveScreenButton)) {                     // 截图，在MKMapViewListener中保存图片                     mMapView.getCurrentMap();                     Toast.makeText(ControlBMapActivity.this, "正在截取屏幕图片...",                             Toast.LENGTH_SHORT).show();                   }                 updateMapState();             }           };         zoomButton.setOnClickListener(onClickListener);         rotateButton.setOnClickListener(onClickListener);         overlookButton.setOnClickListener(onClickListener);         saveScreenButton.setOnClickListener(onClickListener);     }       /**      * 处理缩放，sdk缩放级别范围：[3.0,19.0],小于3.0将按3.0处理；大于19.0将按19.0处理      */     private void perfomZoom() {         EditText t = (EditText) findViewById(R.id.zoomlevel);         try {             float zoomLevel = Float.parseFloat(t.getText().toString());             mMapController.setZoom(zoomLevel);         } catch (NumberFormatException e) {             Toast.makeText(this, "请输入正确的缩放级别,范围： [3.0,19.0],只能输入浮点型或整型",                     Toast.LENGTH_SHORT).show();         }     }       /**      * 处理旋转 ，旋转角单位：度 ，逆时针旋转      */     private void perfomRotate() {         EditText t = (EditText) findViewById(R.id.rotateangle);         try {             int rotateAngle = Integer.parseInt(t.getText().toString());             mMapController.setRotation(rotateAngle);         } catch (NumberFormatException e) {             Toast.makeText(this, "请输入正确的旋转角度,只能为整型", Toast.LENGTH_SHORT).show();         }     }       /**      * 处理俯视 俯角范围： -45 ~ 0 , 单位： 度      */     private void perfomOverlook() {         EditText t = (EditText) findViewById(R.id.overlookangle);         try {             int overlookAngle = Integer.parseInt(t.getText().toString());             mMapController.setOverlooking(overlookAngle);         } catch (NumberFormatException e) {             Toast.makeText(this, "请输入正确的俯角,范围：  -45 ~ 0", Toast.LENGTH_SHORT)                     .show();         }     }       /**      * 更新地图状态显示面板      */     private void updateMapState() {         if (mStateTextView == null) {             return;         }         String state = "";         if (currentPt == null) {             state = "点击、长按、双击地图以获取经纬度和地图状态";         } else {             state = String.format(touchType + ",当前经度 ： %f 当前纬度：%f",                     currentPt.getLongitudeE6() * 1E-6,                     currentPt.getLatitudeE6() * 1E-6);         }         state += "\n";         state += String                 .format("zoom level= %.1f    rotate angle= %d   overlaylook angle=  %d",                         mMapView.getZoomLevel(), mMapView.getMapRotation(),                         mMapView.getMapOverlooking());         mStateTextView.setText(state);     }       @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);     } }

布局XML：

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<?xml version="1.0" encoding="utf-8"?> <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"     android:layout_width="match_parent"     android:layout_height="match_parent"     android:orientation="vertical" >       <LinearLayout         android:id="@+id/layout_bottom"         android:layout_width="match_parent"         android:layout_height="50dip"         android:layout_alignParentBottom="true"         android:orientation="horizontal" >           <Button             android:id="@+id/zoombutton"             android:layout_width="match_parent"             android:layout_height="wrap_content"             android:layout_weight="1"             android:text="缩放" />           <EditText             android:id="@+id/zoomlevel"             android:layout_width="match_parent"             android:layout_height="wrap_content"             android:layout_weight="1"             android:text="10" />           <Button             android:id="@+id/rotatebutton"             android:layout_width="match_parent"             android:layout_height="wrap_content"             android:layout_weight="1"             android:text="旋转" />           <EditText             android:id="@+id/rotateangle"             android:layout_width="match_parent"             android:layout_height="wrap_content"             android:layout_weight="1"             android:numeric="integer"             android:text="90" />           <Button             android:id="@+id/overlookbutton"             android:layout_width="match_parent"             android:layout_height="wrap_content"             android:layout_weight="1"             android:text="俯视" />           <EditText             android:id="@+id/overlookangle"             android:layout_width="match_parent"             android:layout_height="wrap_content"             android:layout_weight="1"             android:text="-30" />     </LinearLayout>       <TextView         android:id="@+id/state"         android:layout_width="match_parent"         android:layout_height="wrap_content"         android:layout_above="@id/layout_bottom"         android:text="点击、长按、双击地图以获取经纬度和地图状态" />       <RelativeLayout         android:layout_width="match_parent"         android:layout_height="wrap_content"         android:layout_above="@id/state"         android:orientation="vertical" >           <com.baidu.mapapi.map.MapView             android:id="@+id/bmapView"             android:layout_width="match_parent"             android:layout_height="match_parent"             android:clickable="true" />           <Button             android:id="@+id/savescreen"             android:layout_width="wrap_content"             android:layout_height="wrap_content"             android:layout_alignParentRight="true"             android:layout_alignParentTop="true"             android:layout_marginTop="10dip"             android:text="截图" />     </RelativeLayout>   </RelativeLayout>

Application类及Manifest同上文。

附上图片效果：