安卓学习之学生签到APP（一）

一、学生定位签到页面

具体实现步骤：

1.1 高德地图申请key

1、创建新应用

进入高德地图api控制台，创建一个新应用。如果您之前已经创建过应用，可直接跳过这个步骤。

2、添加新Key

在创建的应用上点击"添加新Key"按钮，在弹出的对话框中，依次：输入应用名名称，选择绑定的服务为“Android平台SDK”，输入发布版安全码  SHA1、调试版安全码 SHA1、及 Package，如下图所示：

附：SHA1码的获取

1.2 实现高德地图自动定位---准备工作

1、下载jar包，导入jar包

首先去高德地图API官网下载好相关SDK jar文件，将下载的定位 SDK jar 文件复制到工程（此处截图以官方示例Demo为例子）的 libs 目录下，如果有老版本定位 jar 文件存在，请删除。

注：

• 第一个是2D地图的jar包，因为最后定位以后我要在地图上标出来位置
• 第二个是用于定位的jar包

对于每个jar文件，右键-选择Add As Library，导入到工程中。或者使用菜单栏 选择 File ->Project Structure->Modules-> Dependencies。点击绿色的加号选择File dependency. 然后选择要添加的jar包即可，此时build.gradle中会自动生成如下信息。 

2、配置AndroidMainfest.xml文件

<!-- 申请必要的权限-->

<uses-permission android:name="android.permission.INTERNET" />

<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />

<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />

<uses-permission android:name="android.permission.ACCESS_WIFI_STATE" />

<uses-permission android:name="android.permission.READ_PHONE_STATE" />

<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_LOCATION_EXTRA_COMMANDS" />

<uses-permission android:name="android.permission.ACCESS_MOCK_LOCATION" />

<uses-permission android:name="android.permission.CHANGE_WIFI_STATE" />

<application

        android:icon="@mipmap/ic_launcher"

        android:label="@string/app_name"

        android:theme="@style/AppTheme"

        >

        <!--设置key-->

        <meta-data

            android:name="com.amap.api.v2.apikey"

            android:value="这里填写第一步你申请的那个key" />

        <!--声明定位service-->

        <service android:name="com.amap.api.location.APSService"></service>

</application>

AndroidMainfest.xml

3、Activity的布局文件

<com.amap.api.maps2d.MapView

        android:id="@+id/map_view"

        android:layout_width="match_parent"

        android:layout_height="match_parent" >

    </com.amap.api.maps2d.MapView>

    <Button

        android:id="@+id/requet"

        android:layout_width="wrap_content"

        android:layout_height="wrap_content"

        android:text="签到"

        android:layout_alignParentTop="true"

        android:layout_alignParentLeft="true"

        android:layout_alignParentStart="true" />

activity_main

4.

 package com.cqvie.android_map;

 import android.content.DialogInterface;

 import android.icu.text.SimpleDateFormat;

 import android.os.Bundle;

 import android.os.Handler;

 import android.os.Message;

 import android.support.v7.app.AlertDialog;

 import android.support.v7.app.AppCompatActivity;

 import android.util.Log;

 import android.view.View;

 import android.widget.Button;

 import android.widget.Toast;

 import com.amap.api.location.AMapLocation;

 import com.amap.api.location.AMapLocationClient;

 import com.amap.api.location.AMapLocationClientOption;

 import com.amap.api.location.AMapLocationListener;

 import com.amap.api.maps2d.AMap;

 import com.amap.api.maps2d.CameraUpdateFactory;

 import com.amap.api.maps2d.LocationSource;

 import com.amap.api.maps2d.MapView;

 import com.amap.api.maps2d.UiSettings;

 import com.amap.api.maps2d.model.BitmapDescriptorFactory;

 import com.amap.api.maps2d.model.LatLng;

 import com.amap.api.maps2d.model.MarkerOptions;

 import com.cqvie.options.HttpUtilsHttpURLConnection;

 import org.json.JSONException;

 import org.json.JSONObject;

 import java.util.Date;

 import java.util.HashMap;

 import java.util.Map;

 public class MainActivity extends AppCompatActivity implements LocationSource, AMapLocationListener {

     private MapView mapView = null;

     private AMap aMap;

     private Button request;

     private AMapLocationClient mLocationClient;

     private AMapLocationClientOption mLocationOption;

     private OnLocationChangedListener mListener;

     //标识，用于判断是否只显示一次定位信息和用户重新定位

     private boolean isFirstLoc = true;

     String date=null;

     @Override

     protected void onCreate(Bundle savedInstanceState) {

         super.onCreate(savedInstanceState);

         setContentView(R.layout.activity_main);

         //获取地图控件引用

         mapView = (MapView) findViewById(R.id.map_view);

         //在activity执行onCreate时执行mMapView.onCreate(savedInstanceState)，实现地图生命周期管理

         mapView.onCreate(savedInstanceState);

         //获取签到按钮

         request = (Button) findViewById(R.id.requet);

         init();

         //初始化定位

         mLocationClient = new AMapLocationClient(getApplicationContext());

         mLocationClient.setLocationListener(this);

         //初始化定位参数

         mLocationOption = new AMapLocationClientOption();

         // mLocationOption.setLocationMode(AMapLocationClientOption.AMapLocationMode.Device_Sensors);

         mLocationOption.setLocationMode(AMapLocationClientOption.AMapLocationMode.Hight_Accuracy);

         //设置是否返回地址信息（默认返回地址信息）

         mLocationOption.setNeedAddress(true);

         //设置是否只定位一次

         mLocationOption.setOnceLocation(true);

         //设置是否强制刷新WiFi

         mLocationOption.setWifiScan(true);

         //设置定位间隔,单位毫秒,默认为2000ms

         //mLocationOption.setInterval(2000);

         //给定位客户端对象设置定位参数

         mLocationClient.setLocationOption(mLocationOption);

         //启动定位

         mLocationClient.startLocation();

     }

     private void init() {

         if (aMap == null) {

             aMap = mapView.getMap();

             UiSettings settings = aMap.getUiSettings();

             aMap.setLocationSource(this);

             settings.setMyLocationButtonEnabled(true);

             aMap.setMyLocationEnabled(true);

         }

     }

     @Override

     protected void onDestroy() {

         super.onDestroy();

         //在activity执行onDestroy时执行mMapView.onDestroy()，实现地图生命周期管理

         mapView.onDestroy();

         //mLocationClient.stopLocation();

         mLocationClient.onDestroy();

     }

     @Override

     protected void onResume() {

         super.onResume();

         //在activity执行onResume时执行mMapView.onResume ()，实现地图生命周期管理

         mapView.onResume();

     }

     @Override

     protected void onPause() {

         super.onPause();

         //在activity执行onPause时执行mMapView.onPause ()，实现地图生命周期管理

         mapView.onPause();

     }

     @Override

     protected void onSaveInstanceState(Bundle outState) {

         super.onSaveInstanceState(outState);

         //在activity执行onSaveInstanceState时执行mMapView.onSaveInstanceState (outState)，实现地图生命周期管理

         mapView.onSaveInstanceState(outState);

     }

     //    @RequiresApi(api = Build.VERSION_CODES.N)

     @Override

     public void onLocationChanged(final AMapLocation aMapLocation) {

         if (aMapLocation!=null){

             if (aMapLocation.getErrorCode()==0){

                 //定位成功回调信息，设置相关消息

                 aMapLocation.getLocationType();

                 aMapLocation.getLatitude();//获取纬度

                 aMapLocation.getLongitude();//获取经度

                 aMapLocation.getAccuracy();//获取精度信息

                 SimpleDateFormat df = new SimpleDateFormat("HH:mm:ss");

                 Date nowdate = new Date(aMapLocation.getTime());

                 date = df.format(nowdate);//定位时间

                 aMapLocation.getAddress();//地址，如果option中设置isNeedAddress为false，则没有此结果，网络定位结果中会有地址信息，GPS定位不返回地址信息。

                 aMapLocation.getCountry();//国家信息

                 aMapLocation.getProvince();//省信息

                 aMapLocation.getCity();//城市信息

                 aMapLocation.getDistrict();//城区信息

                 aMapLocation.getStreet();//街道信息

                 aMapLocation.getStreetNum();//街道门牌号信息

                 //aMapLocation.getBuildingId();//获取当前室内定位的建筑物Id

                 //aMapLocation.getAccuracy();//获取精度信息

                 aMapLocation.getPoiName();

                 aMapLocation.getAoiName();

                 //Log.d("why", String.valueOf(aMapLocation.getAoiName()));

 //                if (isFirstLoc){

                 //设置缩放级别

                 aMap.moveCamera(CameraUpdateFactory.zoomTo(17));

                 //将地图移动到定位点

                 aMap.moveCamera(CameraUpdateFactory.changeLatLng(new LatLng(aMapLocation.getLatitude(), aMapLocation.getLongitude())));

                 //点击定位按钮 能够将地图的中心移动到定位点

                 mListener.onLocationChanged(aMapLocation);

                 //获取定位信息

                 final StringBuffer buffer = new StringBuffer();

                 buffer.append(aMapLocation.getCountry() + ""

                         //+ aMapLocation.getProvince() + ""

                         + aMapLocation.getCity() + ""

                         // + aMapLocation.getProvince() + ""

                         + aMapLocation.getDistrict() + ""

                         + aMapLocation.getStreet() + ""

                         + aMapLocation.getStreetNum());

                 Toast.makeText(getApplicationContext(), buffer.toString() + aMapLocation.getAoiName(), Toast.LENGTH_LONG).show();

                 //Log.d("tzk",buffer.toString());

                 isFirstLoc = false;

             }

         }

         else {

             Log.d("why", String.valueOf(aMapLocation.getErrorCode()));

             //显示错误信息ErrCode是错误码，errInfo是错误信息，详见错误码表。

             Log.e("AmapError", "location Error, ErrCode:"

                     + aMapLocation.getErrorCode() + ", errInfo:"

                     + aMapLocation.getErrorInfo());

             Toast.makeText(getApplicationContext(), "定位失败", Toast.LENGTH_LONG).show();

         }

         request.setOnClickListener(new View.OnClickListener() {

             @Override

             public void onClick(View view) {

                 new AlertDialog.Builder(MainActivity.this)

                         .setTitle("签到")

                         .setMessage(date+ "\n" + aMapLocation.getAoiName())

                         .setPositiveButton("确定？", new DialogInterface.OnClickListener() {

                             @Override

                             public void onClick(DialogInterface dialogInterface, int i) {

                                 //新页面接收数据

                                 Bundle bundle = MainActivity.this.getIntent().getExtras();

                                 //接收name值

                                 String name = bundle.getString("name");

                                 //Toast.makeText(MainActivity.this,date,Toast.LENGTH_LONG).show();

                                 signClickListen(date,name,aMapLocation.getAoiName());

                             }

                         })

                         .show();

             }

         });

     }

     //激活定位

     @Override

     public void activate(OnLocationChangedListener onLocationChangedListener) {

         mListener = onLocationChangedListener;

     }

     @Override

     public void deactivate() {

         mListener = null;

     }

     /**

      * 签到点击事件

      */

     public void signClickListen(final String date,final  String name,final String signaddress) {

         new Thread(new Runnable() {

             @Override

             public void run() {

                 String url = HttpUtilsHttpURLConnection.BASE_URL + "/SignServlet";

                 Map<String, String> params = new HashMap<String, String>();

                 Message msg = new Message();

                 Bundle data = new Bundle();

                 params.put("signtime",date);

                 params.put("name", name);

                 params.put("signaddress", signaddress);

                 String result = HttpUtilsHttpURLConnection.getContextByHttp(url, params);

                 msg.what = 0x12;

                 data.putString("result", result);

                 msg.setData(data);

                 hander.sendMessage(msg);

             }

             Handler hander = new Handler() {

                 @Override

                 public void handleMessage(Message msg) {

                     if (msg.what == 0x12) {

                         Bundle data = msg.getData();

                         String key = data.getString("result");//得到json返回的json

 //                                   Toast.makeText(MainActivity.this,key,Toast.LENGTH_LONG).show();

                         try {

                             JSONObject json = new JSONObject(key);

                             String result = (String) json.get("result");

                             if ("success".equals(result)) {

                                 Toast.makeText(MainActivity.this,name + "签到成功！", Toast.LENGTH_SHORT).show();

                             } else if ("error".equals(result)) {

                                 Toast.makeText(MainActivity.this,name + "签到失败！", Toast.LENGTH_SHORT).show();

                             }

                         } catch (JSONException e) {

                             e.printStackTrace();

                         }

                     }

                 }

             };

         }).start();

     }

 }

MainActivity