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;
@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：
