jars的引入：

Amap_2DMap_V5.2.0_20170627.jar
AMap_Location_V4.5.0_20190121.jar
AMap_Search_V6.5.0_20180930.jar
Volley.jar

AndroidManifest.xml

关键位置：
uses-permission
meta-data： AK

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="cn.john.abc">
    <!--允许程序打开网络套接字-->
    <uses-permission android:name="android.permission.INTERNET" />
    <!--允许程序设置内置sd卡的写权限-->
    <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
    <!--允许程序获取网络状态-->
    <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
    <!--允许程序访问WiFi网络信息-->
    <uses-permission android:name="android.permission.ACCESS_WIFI_STATE" />
    <!--允许程序读写手机状态和身份-->
    <uses-permission android:name="android.permission.READ_PHONE_STATE" />
    <!--允许程序访问CellID或WiFi热点来获取粗略的位置-->
    <uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION" />
    <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>
    <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.amap.api.v2.apikey" android:value="06808d13e008f2ece6831abbe689c15e"></meta-data>
        <activity android:name=".MainActivity">
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
    </application>

</manifest>

cn.john.abc.MainActivity

package cn.john.abc;
import android.app.Activity;
import android.content.Context;
import android.content.pm.PackageInfo;
import android.content.pm.PackageManager;
import android.os.Bundle;
import android.util.Log;

import com.amap.api.maps2d.MapView;

import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;
import java.util.Locale;


public class MainActivity extends Activity {
    MapView mMapView = null;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        Log.i("sha1.....",sHA1(this));
        //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);
    }

//显示项目的sha1
    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();
            return result.substring(0, result.length()-1);
        } catch (PackageManager.NameNotFoundException e) {
            e.printStackTrace();
        } catch (NoSuchAlgorithmException e) {
            e.printStackTrace();
        }
        return null;
    }
}