[移动开发]【无标题】android开发中百度地图的使用

1、开发者注册与认证
2.Android 地图SDK下载
3.导入包

4.创建应用
5、配置清单文件：

<!--百度定位所需要权限，前面2个是LOCATE权限组的2个危险权限-->
<uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION"/>
<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION"/>
<!--百度定位所需要的普通权限-->
<uses-permission android:name="android.permission.ACCESS_WIFI_STATE"/>
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE"/>
<uses-permission android:name="android.permission.CHANGE_WIFI_STATE"/>
<uses-permission android:name="android.permission.INTERNET"/> <!--因为程序要与百度云服务交互-->

<application
    android:allowBackup="true"
    android:icon="@mipmap/ic_launcher"
    android:label="@string/app_name"
    android:roundIcon="@mipmap/ic_launcher_round"
    android:supportsRtl="true"
    android:theme="@style/Theme.Example10_2">
    <activity
        android:name=".MainActivity"
        android:exported="true">
        <intent-filter>
            <action android:name="android.intent.action.MAIN" />

            <category android:name="android.intent.category.LAUNCHER" />
        </intent-filter>
    </activity>

    <service android:name="com.baidu.location.f" android:enabled="true" android:process=":remote"/>
    <meta-data
        android:name="com.baidu.lbsapi.API_KEY"
        android:value="3X9myEoD28hUU6W0TehkrqDIeA4vxpNc"/><!--应用Key是在百度开发者页面里生成的，需要替换-->

</application>

<com.baidu.mapapi.map.MapView
android:id="@+id/bmapView"
android:layout_width=“fill_parent”
android:layout_height=“fill_parent”
android:clickable=“true” />

7.编写Activity代码
package com.example.example10_2;

import androidx.annotation.NonNull;
import androidx.appcompat.app.AppCompatActivity;
import androidx.core.app.ActivityCompat;

import android.Manifest;
import android.content.pm.PackageManager;
import android.os.Bundle;
import android.widget.TextView;
import android.widget.Toast;

import com.baidu.location.BDLocation;
import com.baidu.location.BDLocationListener;
import com.baidu.location.LocationClient;
import com.baidu.location.LocationClientOption;
import com.baidu.mapapi.SDKInitializer;
import com.baidu.mapapi.map.BaiduMap;
import com.baidu.mapapi.map.MapStatusUpdate;
import com.baidu.mapapi.map.MapStatusUpdateFactory;
import com.baidu.mapapi.map.MapView;
import com.baidu.mapapi.model.LatLng;

/*
百度地图应用，包含定位信息和地图显示
一般需要打开定位服务，选择高精度定位模式，有网络连接
需要在清单文件里使用百度云服务（参见清单文件service标签）
需要创建应用（模块）的Key，并写入清单文件（参见清单文件meta标签）
*/
public class MainActivity extends AppCompatActivity {

LocationClient mLocationClient;  //定位客户端
MapView mapView;  //Android Widget地图控件
BaiduMap baiduMap;
boolean isFirstLocate = true;

TextView tv_Lat;  //纬度
TextView tv_Lon;  //经度
TextView tv_Add;  //地址

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    //如果没有定位权限，动态请求用户允许使用该权限
    if (ActivityCompat.checkSelfPermission(this, Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED) {
        ActivityCompat.requestPermissions(this, new String[]{Manifest.permission.ACCESS_FINE_LOCATION}, 1);
    }else {
        requestLocation();
    }
}
@Override
public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) {
    switch (requestCode) {
        case 1:
            if (grantResults[0] != PackageManager.PERMISSION_GRANTED) {
                Toast.makeText(this, "没有定位权限！", Toast.LENGTH_LONG).show();
                finish();
            } else {
                requestLocation();
            }
    }
}
private void requestLocation() {
    initLocation();
    mLocationClient.start();
}
private void initLocation() {  //初始化
    mLocationClient = new LocationClient(getApplicationContext());
    mLocationClient.registerLocationListener(new MyLocationListener());
    SDKInitializer.initialize(getApplicationContext());
    setContentView(R.layout.activity_main);

    mapView = findViewById(R.id.bmapView);
    baiduMap = mapView.getMap();
    tv_Lat = findViewById(R.id.tv_Lat);
    tv_Lon = findViewById(R.id.tv_Lon);
    tv_Add = findViewById(R.id.tv_Add);

    LocationClientOption option = new LocationClientOption();
    //设置扫描时间间隔
    option.setScanSpan(1000);
    //设置定位模式，三选一
    option.setLocationMode(LocationClientOption.LocationMode.Hight_Accuracy);
    /*option.setLocationMode(LocationClientOption.LocationMode.Battery_Saving);
    option.setLocationMode(LocationClientOption.LocationMode.Device_Sensors);*/
    //设置需要地址信息
    option.setIsNeedAddress(true);
    //保存定位参数
    mLocationClient.setLocOption(option);
}
//内部类，百度位置监听器
private class MyLocationListener  implements BDLocationListener {
    @Override
    public void onReceiveLocation(BDLocation bdLocation) {
        tv_Lat.setText(bdLocation.getLatitude()+"");
        tv_Lon.setText(bdLocation.getLongitude()+"");
        tv_Add.setText(bdLocation.getAddrStr());
        if(bdLocation.getLocType()==BDLocation.TypeGpsLocation || bdLocation.getLocType()==BDLocation.TypeNetWorkLocation){
            navigateTo(bdLocation);
        }
    }
}
private void navigateTo(BDLocation bdLocation) {
    if(isFirstLocate){
        LatLng ll = new LatLng(bdLocation.getLatitude(),bdLocation.getLongitude());
        MapStatusUpdate update = MapStatusUpdateFactory.newLatLng(ll);
        baiduMap.animateMapStatus(update);
        isFirstLocate = false;
    }
}
@Override
protected void onResume() {
    super.onResume();
    mapView.onResume();
}
@Override
protected void onPause() {
    super.onPause();
    mapView.onResume();
}
@Override
protected void onDestroy() {
    super.onDestroy();
    mLocationClient.stop();
    mapView.onDestroy();
}

}

8.实验结果