LBS 经纬度定位

亦凉 2022-06-11 00:18 321阅读 0赞

**运行截图**  
![这里写图片描述][SouthEast]  
**AndroidManifest.xml**

<?xml version="1.0" encoding="utf-8"?>
    <manifest xmlns:android="http://schemas.android.com/apk/res/android"
        package="lbstest.example.com.lbs">
        <uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION"/>
        <uses-permission android:name="android.permission.ACCESS_FINE_LOCATION"/>
        <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE"/>
        <uses-permission android:name="android.permission.READ_PHONE_STATE"/>
        <uses-permission android:name="android.permission.CHANGE_WIFI_STATE"/>
        <uses-permission android:name="android.permission.ACCESS_WIFI_STATE"/>
        <uses-permission android:name="android.permission.MOUNT_UNMOUNT_FILESYSTEMS"/>
        <uses-permission android:name="android.permission.WAKE_LOCK"/>
        <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>
        <uses-permission android:name="android.permission.INTERNET"/>
    
        <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/AppTheme">
            <meta-data
                android:name="com.baidu.lbsapi.API_KEY"
                android:value="PsWuZ62gs3LoEIGjCUavpkehWynGGodD"
                />
            <activity android:name=".MainActivity">
                <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"
                >
    
            </service>
        </application>
    
    </manifest>

**MainACtivity.java代码**

package lbstest.example.com.lbs;
    
    import android.Manifest;
    import android.content.pm.PackageManager;
    import android.os.Bundle;
    import android.os.Handler;
    import android.os.Message;
    import android.support.annotation.NonNull;
    import android.support.v4.app.ActivityCompat;
    import android.support.v4.content.ContextCompat;
    import android.support.v7.app.AppCompatActivity;
    import android.util.Log;
    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 java.util.ArrayList;
    import java.util.List;
    
    public class MainActivity extends AppCompatActivity  {
        
    
        public static final int UPDATE_TEXT = 1;
    
        public LocationClient mLocationClient;
    
        private TextView positionText;
    
        StringBuilder currentPosition;
    
        Handler handler = new Handler(){
            @Override
            public void handleMessage(Message msg) {
                switch (msg.what){
                    case UPDATE_TEXT:
                        positionText.setText(currentPosition);
                        break;
                    default:
                        break;
                }
            }
        };
    
        @Override
        protected void onCreate(Bundle savedInstanceState) {
            super.onCreate(savedInstanceState);
            mLocationClient = new LocationClient(getApplicationContext());
            mLocationClient.registerLocationListener(new MyLoactionListener());
            setContentView(R.layout.activity_main);
            positionText = (TextView) findViewById(R.id.position_text_view);
            List<String> positionList = new ArrayList<>();
            if(ContextCompat.checkSelfPermission(this, Manifest.permission.ACCESS_FINE_LOCATION)!=
                    PackageManager.PERMISSION_GRANTED){
                positionList.add(Manifest.permission.ACCESS_FINE_LOCATION);
            }
            if(ContextCompat.checkSelfPermission(this, Manifest.permission.WRITE_EXTERNAL_STORAGE)!=
                    PackageManager.PERMISSION_GRANTED){
                positionList.add(Manifest.permission.WRITE_EXTERNAL_STORAGE);
            }
            if(ContextCompat.checkSelfPermission(this, Manifest.permission.READ_PHONE_STATE)!=
                    PackageManager.PERMISSION_GRANTED){
                positionList.add(Manifest.permission.READ_PHONE_STATE);
            }
            if(!positionList.isEmpty()){
                String [] permissions = positionList.toArray(new String[positionList.size()]);
                ActivityCompat.requestPermissions(MainActivity.this,permissions,1);
            }else {
                requestLocation();
            }
    
        }
    
        private void requestLocation() {
            initLocation();
            mLocationClient.start();
        }
    
        private void initLocation() {
            LocationClientOption option = new LocationClientOption();
            option.setScanSpan(5000);
            mLocationClient.setLocOption(option);
        }
    
        @Override
        protected void onDestroy() {
            super.onDestroy();
            mLocationClient.stop();
        }
    
        @Override
        public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) {
            switch (requestCode){
                case 1:
                    if (grantResults.length > 0 ){
                        for (int result : grantResults){
                         if (result != PackageManager.PERMISSION_DENIED){
                             Toast.makeText(this,"必须同意所有权限才能使用本程序",Toast.LENGTH_SHORT).show();
                             finish();
                             return;
                         }
                        }
                        requestLocation();
                    }else {
                        Toast.makeText(this,"发生未知错误",Toast.LENGTH_SHORT).show();
                        finish();
                    }
                    break;
                default:
            }
        }
    
        private class MyLoactionListener implements BDLocationListener {
        
            @Override
            public void onReceiveLocation(BDLocation bdLocation) {
               currentPosition = new StringBuilder();
                currentPosition.append("纬度: ").append(bdLocation.getLatitude()).append("\n");
                currentPosition.append("经线: ").append(bdLocation.getLongitude()).append("\n");
                currentPosition.append("定位方式: ");
                if(bdLocation.getLocType() == BDLocation.TypeGpsLocation){
                    currentPosition.append("GPS");
                }else if (bdLocation.getLocType() == BDLocation.TypeNetWorkLocation){
                    currentPosition.append("网络");
                }
                new Thread(new Runnable() {
                    @Override
                    public void run() {
                        Message message = new Message();
                        message.what = UPDATE_TEXT;
                        handler.sendMessage(message);
                    }
                }).start();
                Log.d("Main","本地位置是"+currentPosition);
              //  positionText.setText(currentPosition);
            }
    
            @Override
            public void onConnectHotSpotMessage(String s, int i) {
    
            }
        }
    }

**activity\_main.xml代码**

<?xml version="1.0" encoding="utf-8"?>
    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:orientation="vertical"
        xmlns:android="http://schemas.android.com/apk/res/android">
        <TextView
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:id="@+id/position_text_view"
            />
    </LinearLayout>

[SouthEast]: /images/20220611/785e9e7e0f194af5ac14de610c3acf90.png