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®ion=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
