演示百度地图操作功能
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：
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;@Overrideprotected 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() {@Overridepublic void onMapClick(GeoPoint point) {touchType = "单击";currentPt = point;updateMapState();}@Overridepublic void onMapDoubleClick(GeoPoint point) {touchType = "双击";currentPt = point;updateMapState();}@Overridepublic void onMapLongClick(GeoPoint point) {touchType = "长按";currentPt = point;updateMapState();}};mMapView.regMapTouchListner(mapTouchListener);/** * 设置地图事件监听 */mMapListener = new MKMapViewListener() {@Overridepublic 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();}@Overridepublic 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 * */}@Overridepublic 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();}}@Overridepublic void onMapAnimationFinish() {/** * 地图完成带动画的操作（如: animationTo()）后，此回调被触发 */updateMapState();}@Overridepublic 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() {@Overridepublic 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);}@Overrideprotected 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();}@Overrideprotected 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();}@Overrideprotected 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();}@Overrideprotected void onSaveInstanceState(Bundle outState) {super.onSaveInstanceState(outState);mMapView.onSaveInstanceState(outState);}@Overrideprotected void onRestoreInstanceState(Bundle savedInstanceState) {super.onRestoreInstanceState(savedInstanceState);mMapView.onRestoreInstanceState(savedInstanceState);}}布局XML：
<?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：
