一个抽取百度定位的教程（下载百度地图Demo+配置+抽取）

效果展示

已经下载Demo的可以直接到第五步，已经配置好的并可以运行的可以直接到第七步。

1.在浏览器搜索 ” 百度定位API “，点击下面这个链接

2.翻到最下面找到并点击 ” Android定位SDK “

3.在左侧导航找到 " 产品下载"

4.点击DEMO下载，这个DEMO就开始下载了

5.从文件夹打开并解压

6.此时的文件还不能用自己的Android Atudio打开，需要配置一些参数

配置参数教程

7.可以此时项目能够打开，但是要实现定位功能还需要获取ak鉴权

从16分56秒开始   ak鉴权获取教程

获取SHA1代码

public static String sHA1(Context context) {
            try {
                PackageInfo info = context.getPackageManager().getPackageInfo(
                        context.getPackageName(), PackageManager.GET_SIGNATURES);
                byte[] cert = info.signatures[0].toByteArray();
                MessageDigest md = MessageDigest.getInstance("SHA1");
                byte[] publicKey = md.digest(cert);
                StringBuffer hexString = new StringBuffer();
                for (int i = 0; i < publicKey.length; i++) {
                    String appendString = Integer.toHexString(0xFF & publicKey[i])
                            .toUpperCase(Locale.US);
                    if (appendString.length() == 1)
                        hexString.append("0");
                    hexString.append(appendString);
                    hexString.append(":");
                }
                String result = hexString.toString();
                System.out.println("SHA1:"+result);
                return result;
            } catch (PackageManager.NameNotFoundException e) {
                e.printStackTrace();
            } catch (NoSuchAlgorithmException e) {
                e.printStackTrace();
            }
            return null;
        }

8.Android Atudio打开文件后就可以正常运行啦

9.抽取上面提到的功能

通过MainActivity.java找到需要实现的功能的代码

然后将lib文件夹、servlet文件夹、LocationService.java、AndroidManifest.xml复制到自己的项目中，调试一下基本就可以运行了。

10.代码

MainActivity.java

import androidx.appcompat.app.AppCompatActivity;

import android.Manifest;
import android.annotation.TargetApi;
import android.content.SharedPreferences;
import android.content.pm.PackageManager;
import android.os.Build;
import android.os.Bundle;
import android.text.method.ScrollingMovementMethod;
import android.view.View;
import android.widget.ArrayAdapter;
import android.widget.Button;
import android.widget.ListView;
import android.widget.TextView;

import com.baidu.baidulocationdemo.R;
import com.baidu.location.BDAbstractLocationListener;
import com.baidu.location.BDLocation;
import com.baidu.location.Poi;
import com.baidu.location.PoiRegion;
import com.example.locationdemo.service.LocationService;

import java.util.ArrayList;

public class MainActivity extends AppCompatActivity {
    private final int SDK_PERMISSION_REQUEST = 127;
    private LocationService locationService;
    private String permissionInfo;
    private TextView LocationResult;
    private Button startLocation;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        // sHA1(this);    //获取AK
        getPersimmions();  //获取定位权限
        LocationResult = (TextView) findViewById(R.id.locationResult);
        startLocation = (Button) findViewById(R.id.startLocation);
        initUiti();
    }

    private void initUiti() {
        startLocation.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                locationService.start();
            }
        });
    }

    protected void onStart() {
        // TODO Auto-generated method stub
        super.onStart();
        // -----------location config ------------
        locationService = ((LocationApplication) getApplication()).locationService;
        //获取locationservice实例，建议应用中只初始化1个location实例，然后使用，可以参考其他示例的activity，都是通过此种方式获取locationservice实例的
        locationService.registerListener(mListener);
        //注册监听
        int type = getIntent().getIntExtra("from", 0);
        if (type == 0) {
            locationService.setLocationOption(locationService.getDefaultLocationClientOption());
        } else if (type == 1) {
            locationService.start();
        }
        startLocation.setOnClickListener(new View.OnClickListener() {

            @Override
            public void onClick(View v) {
                if (startLocation.getText().toString().equals("开始定位")) {
                    locationService.start();// 定位SDK
                    // start之后会默认发起一次定位请求，开发者无须判断isstart并主动调用request
                    startLocation.setText("停止定位");
                } else {
                    locationService.stop();
                    startLocation.setText("开始定位");
                }
            }
        });
    }

    /***
     * Stop location service
     */
    @Override
    protected void onStop() {
        // TODO Auto-generated method stub
        locationService.unregisterListener(mListener); //注销掉监听
        locationService.stop(); //停止定位服务
        super.onStop();
    }

    private final BDAbstractLocationListener mListener = new BDAbstractLocationListener() {
        @Override
        public void onReceiveLocation(BDLocation location) {
            if (null != location && location.getLocType() != BDLocation.TypeServerError) {
                if(location.getAddrStr()!=null){
                    LocationResult.setText(location.getAddrStr());
                    locationService.stop();
                }
            }
        }
    };

    @TargetApi(23)
    private void getPersimmions() {
        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
            ArrayList<String> permissions = new ArrayList<String>();
            /***
             * 定位权限为必须权限，用户如果禁止，则每次进入都会申请
             */
            // 定位精确位置
            if (checkSelfPermission(Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED) {
                permissions.add(Manifest.permission.ACCESS_FINE_LOCATION);
            }
            if (checkSelfPermission(Manifest.permission.ACCESS_COARSE_LOCATION) != PackageManager.PERMISSION_GRANTED) {
                permissions.add(Manifest.permission.ACCESS_COARSE_LOCATION);
            }
            /*
             * 读写权限和电话状态权限非必要权限(建议授予)只会申请一次，用户同意或者禁止，只会弹一次
             */
            // 读写权限
            if (addPermission(permissions, Manifest.permission.WRITE_EXTERNAL_STORAGE)) {
                permissionInfo += "Manifest.permission.WRITE_EXTERNAL_STORAGE Deny \n";
            }
            if (permissions.size() > 0) {
                requestPermissions(permissions.toArray(new String[permissions.size()]), SDK_PERMISSION_REQUEST);
            }
        }
    }

    @TargetApi(23)
    private boolean addPermission(ArrayList<String> permissionsList, String permission) {
        // 如果应用没有获得对应权限,则添加到列表中,准备批量申请
        if (checkSelfPermission(permission) != PackageManager.PERMISSION_GRANTED) {
            if (shouldShowRequestPermissionRationale(permission)) {
                return true;
            } else {
                permissionsList.add(permission);
                return false;
            }
        } else {
            return true;
        }
    }

    public void onRequestPermissionsResult(int requestCode, String[] permissions, int[] grantResults) {
        // TODO Auto-generated method stub
        super.onRequestPermissionsResult(requestCode, permissions, grantResults);
    }

      /* public static String sHA1(Context context) {
            try {
                PackageInfo info = context.getPackageManager().getPackageInfo(
                        context.getPackageName(), PackageManager.GET_SIGNATURES);
                byte[] cert = info.signatures[0].toByteArray();
                MessageDigest md = MessageDigest.getInstance("SHA1");
                byte[] publicKey = md.digest(cert);
                StringBuffer hexString = new StringBuffer();
                for (int i = 0; i < publicKey.length; i++) {
                    String appendString = Integer.toHexString(0xFF & publicKey[i])
                            .toUpperCase(Locale.US);
                    if (appendString.length() == 1)
                        hexString.append("0");
                    hexString.append(appendString);
                    hexString.append(":");
                }
                String result = hexString.toString();
                System.out.println("SHA1:"+result);
                return result;
            } catch (PackageManager.NameNotFoundException e) {
                e.printStackTrace();
            } catch (NoSuchAlgorithmException e) {
                e.printStackTrace();
            }
            return null;
        }

        */

}

activity_main.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical">

    <TextView
        android:id="@+id/locationResult"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="Hello World!"
        app:layout_constraintLeft_toLeftOf="parent"
        app:layout_constraintRight_toRightOf="parent"
        app:layout_constraintTop_toTopOf="parent" />
    <Button
        android:id="@+id/startLocation"
        android:text="开始定位"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintLeft_toLeftOf="parent"
        app:layout_constraintRight_toRightOf="parent"
        app:layout_constraintTop_toTopOf="parent"/>

</LinearLayout>

AndroidManifest.xml

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.baidu.baidulocationdemo">

<!-- 这个权限用于进行网络定位-->
<uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION"/>
<!-- 这个权限用于访问GPS定位-->
<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION"/>
<!-- 用于访问wifi网络信息，wifi信息会用于进行网络定位-->
<uses-permission android:name="android.permission.ACCESS_WIFI_STATE"/>
<!-- 获取运营商信息，用于支持提供运营商信息相关的接口-->
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE"/>
<!-- 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-->
<uses-permission android:name="android.permission.CHANGE_WIFI_STATE"/>
<!-- 写入扩展存储，向扩展卡写入数据，用于写入离线定位数据-->
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>
<!-- 访问网络，网络定位需要上网 -->
<uses-permission android:name="android.permission.INTERNET"/>
<!-- 允许挂载和反挂载文件系统可移动存储 -->
<uses-permission android:name="android.permission.MOUNT_UNMOUNT_FILESYSTEMS"/>
<!-- 允许程序读取底层系统日志文件 -->
<uses-permission android:name="android.permission.READ_LOGS"/>
<!-- 允许访问振动设备 -->
<uses-permission android:name="android.permission.VIBRATE"/>
<!-- 允许使用PowerManager的 WakeLocks保持进程在休眠时从屏幕消失 -->
<uses-permission android:name="android.permission.WAKE_LOCK"/>
<!-- 允许程序读取或写入系统设置 -->
<uses-permission android:name="android.permission.WRITE_SETTINGS"/>
<!-- android 9.0上使用前台服务，需要添加权限 -->
<uses-permission android:name="android.permission.FOREGROUND_SERVICE" />
<!-- 用于读取手机当前的状态 -->
<uses-permission android:name="android.permission.READ_PHONE_STATE" />
<!-- 读取缓存数据 -->
<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />
<!-- 获取模拟定位信息 -->
<uses-permission android:name="android.permission.ACCESS_MOCK_LOCATION"/>

<application
    android:requestLegacyExternalStorage="true"
    android:name="com.example.locationdemo.LocationApplication"
    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/AppTheme">
    <!-- 声明service组件 -->
    <service
        android:name="com.baidu.location.f"
        android:enabled="true"
        android:process=":remote"/>
    <!-- AK鉴权 -->
    <meta-data
        android:name="com.baidu.lbsapi.API_KEY"
        android:value="2N8xydK1CHyShBGxYhMkzTP0jRsVv9Lh" /> <!-- http://lbsyun.baidu.com/apiconsole/key -->

    <activity
        android:name="com.example.locationdemo.MainActivity">
        <intent-filter>
            <action android:name="android.intent.action.MAIN" />
            <category android:name="android.intent.category.LAUNCHER" />
        </intent-filter>
    </activity>
</application>

</manifest>

github：查看代码