调用网页百度地图进行路径规划

参考链接：https://blog.csdn.net/tianxintiandisheng/article/details/81870710

该Demo里有其他的多余功能，可自行删减。

运行效果图（运行前要开启定位权限）：点击保存按钮将会把编辑框里的地址保存到数据库

                     

目录结构图：

manifest：以下的权限并非都是必要的
 1 <?xml version="1.0" encoding="utf-8"?>
 2 <manifest xmlns:android="http://schemas.android.com/apk/res/android"
 3     package="com.mingrisoft.routeplanning5">
 4 
 5     //获取设备网络状态，禁用后无法获取网络状态
 6     <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
 7     //网络权限，当禁用后，无法进行检索等相关业务
 8     <uses-permission android:name="android.permission.INTERNET" />
 9     //读取设备硬件信息，统计数据
10     <uses-permission android:name="android.permission.READ_PHONE_STATE" />
11     //读取系统信息，包含系统版本等信息，用作统计
12     <uses-permission android:name="com.android.launcher.permission.READ_SETTINGS" />
13     //获取设备的网络状态，鉴权所需网络代理
14     <uses-permission android:name="android.permission.ACCESS_WIFI_STATE" />
15     //允许sd卡写权限，需写入地图数据，禁用后无法显示地图
16     <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
17     //允许sd卡读权限，需读取地图数据，禁用后无法显示地图
18     <uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />
19     //获取统计数据
20     <uses-permission android:name="android.permission.WRITE_SETTINGS" />
21     //鉴权所需该权限获取进程列表
22     <uses-permission android:name="android.permission.GET_TASKS" />
23     //使用步行AR导航，配置Camera权限
24     <uses-permission android:name="android.permission.CAMERA" />
25     //网络定位
26     <uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION" />
27     //GPS定位
28     <uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />
29     <!-- 这个权限用于获取wifi的获取权限，wifi信息会用来进行网络定位-->
30     <uses-permission android:name="android.permission.CHANGE_WIFI_STATE" />
31 
32 
33     <application
34         android:allowBackup="true"
35         android:icon="@mipmap/ic_launcher"
36         android:label="@string/app_name"
37         android:roundIcon="@mipmap/ic_launcher_round"
38         android:supportsRtl="true"
39         android:theme="@style/AppTheme"
40         android:usesCleartextTraffic="true">
41 
42         <meta-data
43             android:name="com.baidu.lbsapi.API_KEY"
44             android:value="gEnaDhNCFNRRCKmc7XPM1PttGalSkeKr"/>
45 
46         <activity android:name=".MainActivity">
47             <intent-filter>
48                 <action android:name="android.intent.action.MAIN" />
49 
50                 <category android:name="android.intent.category.LAUNCHER" />
51             </intent-filter>
52         </activity>
53         <activity android:name=".ToThere"></activity>
54     </application>
55 
56 </manifest>
DBHospital：
 1 package com.mingrisoft.routeplanning5;
 2 
 3 import android.content.Context;
 4 import android.database.sqlite.SQLiteDatabase;
 5 import android.database.sqlite.SQLiteOpenHelper;
 6 import android.support.annotation.Nullable;
 7 import android.util.Log;
 8 
 9 public class DBHospital extends SQLiteOpenHelper {
10     //用数据库保存目的地，app重启后可从数据库中读取到上次的目的地
11     String createHospital = "create table tb_hospital (_id integer primary key autoincrement," +
12             "hospital)";
13 
14     public DBHospital(@Nullable Context context, @Nullable String name, @Nullable SQLiteDatabase.CursorFactory factory, int version) {
15         super(context, name, null, version);
16     }
17 
18     @Override
19     public void onCreate(SQLiteDatabase db) {
20         db.execSQL(createHospital);
21     }
22 
23     @Override
24     public void onUpgrade(SQLiteDatabase sqLiteDatabase, int oldVersion, int newVersion) {
25         Log.i("社区卫生中心地址表","版本更新" + oldVersion + "-->" + newVersion);
26     }
27 }
MainActivity：
 1 package com.mingrisoft.routeplanning5;
 2 
 3 import android.content.ContentValues;
 4 import android.content.Intent;
 5 import android.database.Cursor;
 6 import android.database.sqlite.SQLiteDatabase;
 7 import android.net.Uri;
 8 import android.os.Build;
 9 import android.support.v7.app.AppCompatActivity;
10 import android.os.Bundle;
11 import android.util.Log;
12 import android.view.View;
13 import android.view.WindowManager;
14 import android.webkit.WebChromeClient;
15 import android.webkit.WebView;
16 import android.webkit.WebViewClient;
17 import android.widget.Button;
18 import android.widget.EditText;
19 import android.widget.Toast;
20 
21 public class MainActivity extends AppCompatActivity {
22     private DBHospital dbHospital;
23     Button btn_hc_saveAddress;
24     Button toThere;
25     EditText et_hc_address;
26 
27     @Override
28     protected void onCreate(Bundle savedInstanceState) {
29         super.onCreate(savedInstanceState);
30         setContentView(R.layout.activity_main);
31 
32         btn_hc_saveAddress = findViewById(R.id.btn_hc_saveAddress);
33         et_hc_address = findViewById(R.id.ed_hc_address);
34         toThere = findViewById(R.id.btn_hc_toThere);
35 
36         dbHospital = new DBHospital(MainActivity.this,"db_hospital",null,1);
37         Cursor cursor = dbHospital.getReadableDatabase().query("tb_hospital",null,null, null, null,null,null);
38 
39         //读取上次的目的地显示在编辑框中
40         if (cursor.getCount() == 0) {
41             et_hc_address.setHint("记录为空，可添加社区卫生服务中心地址!");
42         } else {
43             while (cursor.moveToNext()) {
44                 et_hc_address.setText(cursor.getString(1));
45             }
46         }
47 
48         //更改并保存新的目的地到数据库
49         btn_hc_saveAddress.setOnClickListener(new View.OnClickListener() {
50             @Override
51             public void onClick(View v) {
52                 if (et_hc_address.getText().toString().equals("")) {
53                     Toast.makeText(MainActivity.this, "内容为空！", Toast.LENGTH_SHORT).show();
54                 } else {
55                     dbHospital.getReadableDatabase().delete("tb_hospital", null, null);
56                     insertData(dbHospital.getReadableDatabase(), et_hc_address.getText().toString());
57                     Toast.makeText(MainActivity.this, "名称（地址）更改成功！", Toast.LENGTH_SHORT).show();
58                 }
59             }
60         });
61 
62         //规划路线
63         toThere.setOnClickListener(new View.OnClickListener() {
64             @Override
65             public void onClick(View view) {
66                 String destination = et_hc_address.getText().toString();
67 
68                 if (destination.equals("")) {
69                     Toast.makeText(MainActivity.this, "内容为空，无法规划路线！", Toast.LENGTH_SHORT).show();
70                 } else {
71                     Bundle bundle = new Bundle();
72                     bundle.putCharSequence("destination", destination);
73                     Intent intent = new Intent(MainActivity.this, ToThere.class);
74                     intent.putExtras(bundle);
75                     startActivity(intent);
76                 }
77             }
78         });
79     }
80 
81     private void insertData(SQLiteDatabase sqLiteDatabase, String hospital) {
82         ContentValues contentValues = new ContentValues();
83         contentValues.put("hospital", hospital);
84         sqLiteDatabase.insert("tb_hospital",null,contentValues);
85     }
86 }
ToThere：
  1 package com.mingrisoft.routeplanning5;
  2 
  3 import android.Manifest;
  4 import android.app.Activity;
  5 import android.content.Context;
  6 import android.content.Intent;
  7 import android.content.pm.PackageManager;
  8 import android.location.Location;
  9 import android.location.LocationListener;
 10 import android.location.LocationManager;
 11 import android.net.Uri;
 12 import android.os.Build;
 13 import android.support.v4.app.ActivityCompat;
 14 import android.support.v7.app.AppCompatActivity;
 15 import android.os.Bundle;
 16 import android.util.Log;
 17 import android.view.WindowManager;
 18 import android.webkit.WebChromeClient;
 19 import android.webkit.WebView;
 20 import android.webkit.WebViewClient;
 21 import android.widget.Button;
 22 import android.widget.EditText;
 23 import android.widget.Toast;
 24 
 25 import java.util.List;
 26 
 27 public class ToThere extends Activity {
 28     LocationManager locationManager;
 29 
 30     @Override
 31     protected void onCreate(Bundle savedInstanceState) {
 32         super.onCreate(savedInstanceState);
 33         setContentView(R.layout.activity_to_there);
 34 
 35         //获取系统的LocationManager对象
 36         LocationManager locationManager = (LocationManager) getSystemService(LOCATION_SERVICE);
 37 
 38         //添加权限检查
 39         if (ActivityCompat.checkSelfPermission(this, Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED && ActivityCompat.checkSelfPermission(this, Manifest.permission.ACCESS_COARSE_LOCATION) != PackageManager.PERMISSION_GRANTED) {
 40             // TODO: Consider calling
 41             //    ActivityCompat#requestPermissions
 42             // here to request the missing permissions, and then overriding
 43             //   public void onRequestPermissionsResult(int requestCode, String[] permissions,
 44             //                                          int[] grantResults)
 45             // to handle the case where the user grants the permission. See the documentation
 46             // for ActivityCompat#requestPermissions for more details.
 47             return;
 48         }
 49         //设置每一秒获取一次location信息
 50         locationManager.requestLocationUpdates(
 51                 LocationManager.GPS_PROVIDER,      //GPS定位提供者
 52                 1000,       //更新数据时间为1秒
 53                 1,      //位置间隔为1米
 54                 //位置监听器
 55                 new LocationListener() {  //GPS定位信息发生改变时触发，用于更新位置信息
 56 
 57                     @Override
 58                     public void onLocationChanged(Location location) {
 59                         //GPS信息发生改变时，更新位置
 60                         locationUpdates(location);
 61                     }
 62 
 63                     @Override
 64                     //位置状态发生改变时触发
 65                     public void onStatusChanged(String provider, int status, Bundle extras) {
 66                     }
 67 
 68                     @Override
 69                     //定位提供者启动时触发
 70                     public void onProviderEnabled(String provider) {
 71                     }
 72 
 73                     @Override
 74                     //定位提供者关闭时触发
 75                     public void onProviderDisabled(String provider) {
 76                     }
 77                 });
 78         //从GPS获取最新的定位信息
 79         //如果只有getLastKnownLocation（）没有requestLocationUpdates很可能location为空，所以最好实现requestLocationUpdates（）
 80         Location location = locationManager.getLastKnownLocation(LocationManager.GPS_PROVIDER);
 81         locationUpdates(location);    //将最新的定位信息传递给创建的locationUpdates()方法中
 82     }
 83 
 84     public void locationUpdates(Location location) {  //获取指定的查询信息
 85         //如果location不为空时
 86         if (location != null) {
 87             Intent intent = getIntent();
 88             Bundle bundle = intent.getExtras();
 89             String destination = bundle.getString("destination");
 90             String start =location.getLatitude() + "," + location.getLongitude();//起点经纬度
 91 
 92             //设置全屏显示
 93             getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN,
 94                     WindowManager.LayoutParams.FLAG_FULLSCREEN);
 95             WebView webView = (WebView) findViewById(R.id.wv_hc);       //获取布局管理器中添加的WebView组件
 96             webView.getSettings().setUseWideViewPort(true);    //设置此属性，可任意比例缩放
 97             webView.getSettings().setLoadWithOverviewMode(true); //设置加载内容自适应屏幕
 98             //使WebView组件具有放大和缩小网页的功能
 99             webView.getSettings().setSupportZoom(true);
100             webView.getSettings().setBuiltInZoomControls(true);
101             Log.i("dddddddd", start);
102             //调用网页百度地图进行路径规划，如果精度不够可能得开启浏览器定位权限
103             webView.loadUrl("http://api.map.baidu.com/direction?origin=latlng:" + start +
104                     "|name:我的位置&destination=" + destination +
105                     "&mode=driving&region=南宁&output=html&src=webapp.baidu.openAPIdemo");//指定要加载的网页
106         } else {
107             Toast.makeText(ToThere.this, "无法获取定位信息！请移动", Toast.LENGTH_SHORT).show();
108         }
109     }
110 }

activity_main.xml：

 1 <?xml version="1.0" encoding="utf-8"?>
 2 <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
 3     xmlns:app="http://schemas.android.com/apk/res-auto"
 4     xmlns:tools="http://schemas.android.com/tools"
 5     android:layout_width="match_parent"
 6     android:layout_height="match_parent"
 7     android:orientation="vertical"
 8     tools:context=".MainActivity">
 9 
10     <TextView
11         android:layout_width="match_parent"
12         android:layout_height="wrap_content"
13         android:text="社区卫生服务中心名称（地址）："/>
14 
15     <EditText
16         android:id="@+id/ed_hc_address"
17         android:layout_width="match_parent"
18         android:layout_height="wrap_content" />
19 
20     <LinearLayout
21         android:layout_width="match_parent"
22         android:layout_height="wrap_content">
23 
24         <Button
25             android:id="@+id/btn_hc_saveAddress"
26             android:layout_width="wrap_content"
27             android:layout_height="wrap_content"
28             android:text="点击保存"/>
29 
30         <Button
31             android:id="@+id/btn_hc_toThere"
32             android:layout_width="wrap_content"
33             android:layout_height="wrap_content"
34             android:text="点击规划路线"/>
35 
36     </LinearLayout>
37 
38 </LinearLayout>

activity_to_there.xml：

 1 <?xml version="1.0" encoding="utf-8"?>
 2 <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
 3     xmlns:app="http://schemas.android.com/apk/res-auto"
 4     xmlns:tools="http://schemas.android.com/tools"
 5     android:layout_width="match_parent"
 6     android:layout_height="match_parent"
 7     tools:context=".ToThere">
 8 
 9     <WebView
10         android:id="@+id/wv_hc"
11         android:layout_width="match_parent"
12         android:layout_height="match_parent" />
13 
14 </RelativeLayout>

后来发现了定位不精准的问题，找到了一些解决方法：

1.开启浏览器的定位权限

2.调用百度地图api时设置coord_type参数

参考链接：http://lbsyun.baidu.com/index.php?title=uri/api/web

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原文地址：https://www.cnblogs.com/hemeiwolong/p/12780399.html