5.29

所花时间（包括上课）：3

打码量(行)：300

博客量(篇)：1

了解到知识点：学习地图组件

 

 package com.example.myapp;

 

import android.os.Bundle;

 

import androidx.appcompat.app.AppCompatActivity;

 

import com.google.android.gms.maps.CameraUpdateFactory;

import com.google.android.gms.maps.GoogleMap;

import com.google.android.gms.maps.OnMapReadyCallback;

import com.google.android.gms.maps.SupportMapFragment;

import com.google.android.gms.maps.model.LatLng;

import com.google.android.gms.maps.model.MarkerOptions;

 

public class MainActivity extends AppCompatActivity implements OnMapReadyCallback {

 

    private GoogleMap googleMap;

 

    @Override

    protected void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

        setContentView(R.layout.activity_main);

 

        SupportMapFragment mapFragment = (SupportMapFragment) getSupportFragmentManager()

                .findFragmentById(R.id.mapFragment);

        if (mapFragment != null) {

            mapFragment.getMapAsync(this);

        }

    }

 

    @Override

    public void onMapReady(GoogleMap googleMap) {

        this.googleMap = googleMap;

 

        // 添加一个标记示例

        LatLng sydney = new LatLng(-34, 151);

        googleMap.addMarker(new MarkerOptions().position(sydney).title("Marker in Sydney"));

        googleMap.moveCamera(CameraUpdateFactory.newLatLng(sydney));

    }

}

<?xml version="1.0" encoding="utf-8"?>

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"

    android:layout_width="match_parent"

    android:layout_height="match_parent">

 

    <fragment

        android:id="@+id/mapFragment"

        android:name="com.google.android.gms.maps.SupportMapFragment"

        android:layout_width="match_parent"

        android:layout_height="match_parent"

        android:layout_marginTop="?android:attr/actionBarSize"

        android:layout_alignParentTop="true"

        android:layout_alignParentStart="true" />

 

</RelativeLayout>