演示Android百度地图操作功能
jopen
11年前
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; @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：
<?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：
