20202428 2023-2024-2 《移动平台开发与实践》第5次作业

白鹤大人泰库拉 2024-06-22 09:45:40

1.实验内容

设计并开发一个地图应用系统。
该实验需提前申请百度API Key，调用接口实现百度地图的定位功能、地图添加覆盖物和显示文本信息。

2.实验过程

2.1申请密钥

在控制台创建应用，需要发布版的sha1，因此需要在as里创建签名文件，并用keytool来获取sha1

2.1.1.创建release版本的签名文件：

先去Build菜单下生成一个正式的.jks签名文件

进行release版本的签名验证：
file>project structure>modules>signing configs

获取sha1：
keytool -list -v -keystore F: \miyao\1. jks

申请key：

2.2配置开发环境

第一步：在工程app/libs目录下放入BaiduLBS_Android.jar包
第二步：工程配置还需要把jar包集成到自己的工程中，放入libs目录下。jar文件右键-选择Add As Library，导入到工程中。

2.3编写代码

androidmanifest,xml

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
package="com.example.mylocation">
<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">
<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.example.baidu"
android:enabled="true"
android:process=":remote"/>
<meta-data
android:name="com.baidu.lbsapi.API_KEY"
android:value="6lmYlAJwcQUNz2gGwem8VXpq0T7lDGxG"/>
</application>

<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_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"/>
</manifest>

activity_main.xml

<?xml version="1.0" encoding="utf-8"?>
<FrameLayout 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"
tools:context=".MainActivity">

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

<LinearLayout
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:background="#e0000000"
android:orientation="vertical" >
<LinearLayout
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginLeft="12dp"
android:layout_marginTop="20dp"
android:orientation="horizontal" >
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="纬度："
android:textColor="#ffffff"
android:textSize="15dp" />
<TextView
android:id="@+id/tv_Lat"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text=""
android:textColor="#ffffff"
android:textSize="15dp" />
</LinearLayout>
<LinearLayout
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginLeft="12dp"
android:layout_marginTop="10dp"
android:orientation="horizontal" >
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="经度："
android:textColor="#ffffff"
android:textSize="15dp" />
<TextView
android:id="@+id/tv_Lon"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text=""
android:textColor="#ffffff"
android:textSize="15dp" />
</LinearLayout>
<LinearLayout
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginBottom="10dp"
android:layout_marginLeft="12dp"
android:layout_marginTop="10dp"
android:orientation="horizontal" >
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="地址："
android:textColor="#ffffff"
android:textSize="15dp" />
<TextView
android:id="@+id/tv_Add"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text=""
android:textColor="#ffffff"
android:textSize="15dp" />
</LinearLayout>
</LinearLayout>
</FrameLayout>

MainActivity

package com.example.baidu;
import android.Manifest;
import android.content.pm.PackageManager;
import android.support.annotation.NonNull;
import android.support.v4.app.ActivityCompat;
import android.support.v7.app.AppCompatActivity;
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.BitmapDescriptor;
import com.baidu.mapapi.map.BitmapDescriptorFactory;
import com.baidu.mapapi.map.MapStatusUpdate;
import com.baidu.mapapi.map.MapStatusUpdateFactory;
import com.baidu.mapapi.map.MapView;
import com.baidu.mapapi.map.MyLocationConfiguration;
import com.baidu.mapapi.model.LatLng;
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=(MapView)findViewById(R.id.bmapView);
mapView.onResume();
}
@Override
protected void onDestroy() {
super.onDestroy();
mLocationClient.stop();
mapView.onDestroy();
}