package com.example.gaodemap;
import androidx.appcompat.app.AppCompatActivity;
import android.os.Bundle;
import com.amap.api.maps.AMap;
import com.amap.api.maps.MapView;
public class MainActivity<mapView, savedInstanceState> extends AppCompatActivity {
MapView mMapView = null;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
}
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
//获取地图控件引用
mMapView = (MapView) findViewById(R.id.map);
//在activity执行onCreate时执行mMapView.onCreate(savedInstanceState),创建地图
mMapView.onCreate(savedInstanceState);
}
@Override
protected void onDestroy() {
super.onDestroy();
//在activity执行onDestroy时执行mMapView.onDestroy(),销毁地图
mMapView.onDestroy();
}
@Override
protected void onResume() {
super.onResume();
//在activity执行onResume时执行mMapView.onResume (),重新绘制加载地图
mMapView.onResume();
}
@Override
protected void onPause() {
super.onPause();
//在activity执行onPause时执行mMapView.onPause (),暂停地图的绘制
mMapView.onPause();
}
@Override
protected void onSaveInstanceState(Bundle outState) {
super.onSaveInstanceState(outState);
//在activity执行onSaveInstanceState时执行mMapView.onSaveInstanceState (outState),保存地图当前的状态
mMapView.onSaveInstanceState(outState);
}
//定义了一个地图view
mapView = (MapView)
findViewById(R.id.map) {
}
mapView.onCreate(savedInstanceState);// 此方法须覆写,虚拟机需要在很多情况下保存地图绘制的当前状态。
//初始化地图控制器对象
AMap aMap;
if (aMap == null) {
aMap = mapView.getMtap();
}
}
地图这方面你最好还是不要用,会造成性能的一个滑坡,毕竟现在的手机都内置了地图
你还是去看看https://blog.csdn.net/qq_38436214/article/details/111628025这篇文章吧,我感觉你的代码很有问题。