调起百度地图客户端之导航功能

该Demo的意思就是通过该程序去调起手机上已安装了的百度地图android客户端来进行导航，其实，个人觉得该功能实际意义不大，因为如果手机上已安装了百度地图客户端，我们可以直接就使用它进行导航，该程序只是负责去调起百度地图客户端的导航功能，而本程序并不任何导航功能，不过了解一下怎么调用也好，代码如下：

Activity：

package com.home;import android.app.Activity;import android.app.AlertDialog;import android.content.DialogInterface;import android.content.DialogInterface.OnClickListener;import android.os.Bundle;import android.view.View;import android.widget.TextView;import com.baidu.mapapi.navi.BaiduMapAppNotSupportNaviException;import com.baidu.mapapi.navi.BaiduMapNavigation;import com.baidu.mapapi.navi.NaviPara;import com.baidu.platform.comapi.basestruct.GeoPoint;public class NaviActivity extends Activity {// 天安门坐标double mLat1 = 39.915291;double mLon1 = 116.403857;// 百度大厦坐标double mLat2 = 40.056858;double mLon2 = 116.308194;@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.activity_navi_demo);TextView text = (TextView) findViewById(R.id.navi_info);text.setText(String.format("起点:(%f,%f)\n终点:(%f,%f)", mLat1, mLon1,mLat2, mLon2));}/** * 开始导航 *  * @param view */public void startNavi(View view) {int lat = (int) (mLat1 * 1E6);int lon = (int) (mLon1 * 1E6);GeoPoint pt1 = new GeoPoint(lat, lon);lat = (int) (mLat2 * 1E6);lon = (int) (mLon2 * 1E6);GeoPoint pt2 = new GeoPoint(lat, lon);// 构建 导航参数NaviPara para = new NaviPara();para.startPoint = pt1;para.startName = "从这里开始";para.endPoint = pt2;para.endName = "到这里结束";try {BaiduMapNavigation.openBaiduMapNavi(para, this);} catch (BaiduMapAppNotSupportNaviException e) {e.printStackTrace();AlertDialog.Builder builder = new AlertDialog.Builder(this);builder.setMessage("您尚未安装百度地图app或app版本过低，点击确认安装？");builder.setTitle("提示");builder.setPositiveButton("确认", new OnClickListener() {@Overridepublic void onClick(DialogInterface dialog, int which) {dialog.dismiss();BaiduMapNavigation.GetLatestBaiduMapApp(NaviActivity.this);}});builder.setNegativeButton("取消", new OnClickListener() {@Overridepublic void onClick(DialogInterface dialog, int which) {dialog.dismiss();}});builder.create().show();}}}

布局XML：

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"    xmlns:tools="http://schemas.android.com/tools"    android:layout_width="match_parent"    android:layout_height="match_parent"    android:background="@android:color/white"    tools:context=".NaviDemo" >    <TextView        android:id="@+id/navi_info"        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:layout_centerHorizontal="true"        android:layout_centerVertical="true"        android:layout_marginLeft="10dp"        android:layout_marginRight="10dp"        android:textColor="@android:color/black"        android:textSize="16sp" />    <Button        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:layout_below="@+id/navi_info"        android:layout_centerHorizontal="true"        android:layout_marginTop="76dp"        android:onClick="startNavi"        android:text="开始导航" />    <TextView        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:layout_above="@+id/navi_info"        android:layout_alignParentLeft="true"        android:layout_marginBottom="57dp"        android:layout_marginLeft="10dp"        android:layout_marginRight="10dp"        android:text="@string/navi_tip"        android:textColor="@android:color/black"        android:textSize="16sp" /></RelativeLayout>

String：navi_tip

<string name="navi_tip">本功能为调起百度地图Android客户端（V5.0及以上版本）的导航功能，用户必须已安装百度地图客户端，如果没有安装则提示用户下载安装百度地图客户端。</string>

附上图片效果：