《ArcGIS Runtime SDK for Android开发笔记》——离在线一体化技术：离线矢量数据同步

1、前言

上一篇文章中我们实现了离线要素的编辑操作，这一篇中主要介绍离在线一体化技术中最后一个环节离线数据的同步功能，通过对数据的上传，服务器端的版本化管理，实现数据生产管理的整个流程。

转载请注明出处：http://www.cnblogs.com/gis-luq/p/5858062.html

2、demo实现过程

2.1、Demo UI实现

activity_main.xml

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context="com.example.syncgdb.MainActivity">

    <!-- MapView -->
    <com.esri.android.map.MapView
        android:id="@+id/map"
        android:layout_width="fill_parent"
        android:layout_height="fill_parent"
        mapoptions.MapType="Topo"
        mapoptions.ZoomLevel="5"
        mapoptions.center="28.671298, 104.066404" />

    <Button
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="离线数据同步"
        android:id="@+id/btnSync"
        android:layout_alignParentTop="true"
        android:layout_alignParentRight="true"
        android:layout_alignParentEnd="true" />

</RelativeLayout>

2.3、实现离线地理数据库同步

基本思路：

获取.geodatabase文件存储路径
根据FeatureService服务获取FeatureServiceInfo服务参数信息
根据FeatureServiceInfo信息同步离线地理数据库
在UI线程中反馈同步结果

完整代码

package com.example.syncgdb;

import android.app.Activity;
import android.app.ProgressDialog;
import android.content.Context;
import android.os.Environment;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.widget.Button;
import android.widget.Toast;

import com.esri.android.map.FeatureLayer;
import com.esri.android.map.MapView;
import com.esri.core.ags.FeatureServiceInfo;
import com.esri.core.geodatabase.Geodatabase;
import com.esri.core.geodatabase.GeodatabaseFeatureTable;
import com.esri.core.geodatabase.GeodatabaseFeatureTableEditErrors;
import com.esri.core.map.CallbackListener;
import com.esri.core.tasks.geodatabase.GeodatabaseStatusCallback;
import com.esri.core.tasks.geodatabase.GeodatabaseStatusInfo;
import com.esri.core.tasks.geodatabase.GeodatabaseSyncTask;
import com.esri.core.tasks.geodatabase.SyncGeodatabaseParameters;

import java.io.File;
import java.io.FileNotFoundException;
import java.util.Map;

public class MainActivity extends AppCompatActivity {

    protected static final String TAG = "syncGDB";
    private Context context;

    private MapView mMapView;//地图容器

    private static String onlineFeatureLayerUrl = "http://192.168.1.212:6080/arcgis/rest/services/testdata/FeatureServer";//在线FeatureLayer地址
    private static String localGdbFilePath;//离线GDB地址

    private GeodatabaseSyncTask gdbSyncTask;//离线地理数据库下载Task
    private ProgressDialog mProgressDialog;//状态框

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        this.context = this;
        this.mMapView = (MapView)findViewById(R.id.map);

        //设置离线地理数据库存储路径
        localGdbFilePath = createGeodatabaseFilePath();
        //加载离线地理数据库
        addFeatureLayer(localGdbFilePath);

        mProgressDialog = new ProgressDialog(context);
        //设置点击进度对话框外的区域对话框不消失
        mProgressDialog.setCanceledOnTouchOutside(false);
        mProgressDialog.setTitle("正在同步离线地理数据库副本到服务器");
        
        //绑定按钮设置下载事件
        Button btnSyncGDB = (Button)this.findViewById(R.id.btnSync);
        btnSyncGDB.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                SyncOfflineData();//同步离线地理数据库
            }
        });
    }

    /**
     * Geodatabase文件存储路径
     */
    static String createGeodatabaseFilePath() {
        return Environment.getExternalStorageDirectory().getAbsolutePath() + File.separator + "/RuntimeOfflineEdit"
                + File.separator + "demo.geodatabase";
    }

    /**
     * 读取Geodatabase中离线地图信息
     * @param featureLayerPath 离线Geodatabase文件路径
     */
    private void addFeatureLayer(String featureLayerPath) {

        Geodatabase localGdb = null;
        try {
            localGdb = new Geodatabase(featureLayerPath);
        } catch (FileNotFoundException e) {
            e.printStackTrace();
        }

        // 添加FeatureLayer到MapView中
        if (localGdb != null) {
            for (GeodatabaseFeatureTable gdbFeatureTable : localGdb.getGeodatabaseTables()) {
                if (gdbFeatureTable.hasGeometry()){
                    FeatureLayer layer = new FeatureLayer(gdbFeatureTable);
                    mMapView.addLayer(layer);
                }
            }
        }
    }

    /**
     * 同步离线地理数据库
     */
    private void SyncOfflineData() {

        Log.i(TAG, "Sync GeoDatabase");
        // create a dialog to update user on progress
        mProgressDialog.show();

        gdbSyncTask = new GeodatabaseSyncTask(onlineFeatureLayerUrl, null);
        gdbSyncTask.fetchFeatureServiceInfo(new CallbackListener<FeatureServiceInfo>() {

            @Override
            public void onError(Throwable arg0) {
                Log.e(TAG, "获取FeatureServiceInfo失败");
            }

            @Override
            public void onCallback(FeatureServiceInfo fsInfo) {
                if (fsInfo.isSyncEnabled()) {
                    SyncGeodatabase(fsInfo);
                }
            }
        });
    }

    /**
     * 根据FeatureServiceInfo信息获取离线地理数据库同步信息
     * @param featureServerInfo 服务参数信息
     */
    private void SyncGeodatabase(FeatureServiceInfo featureServerInfo) {
        try {
            // 创建一个离线地理数据库
            Geodatabase gdb = new Geodatabase(localGdbFilePath);

            // 获取离线地理数据库同步参数
            final SyncGeodatabaseParameters syncParams = gdb.getSyncParameters();

            CallbackListener<Map<Integer, GeodatabaseFeatureTableEditErrors>> syncResponseCallback
                    = new CallbackListener<Map<Integer, GeodatabaseFeatureTableEditErrors>>() {

                @Override
                public void onCallback(Map<Integer, GeodatabaseFeatureTableEditErrors> objs) {
                    mProgressDialog.dismiss();
                    if (objs != null) {
                        if (objs.size() > 0) {
                            showMakeText("同步完成，但是发生错误");
                        } else {
                            showMakeText("同步完成：同步成功");
                        }
                    } else {
                        showMakeText("同步完成：同步成功");
                    }
                }

                @Override
                public void onError(Throwable e) {
                    Log.e(TAG, "", e);
                    mProgressDialog.dismiss();
                    Toast.makeText(context, "Error:"+e.toString(), Toast.LENGTH_SHORT).show();
                }

            };

            GeodatabaseStatusCallback statusCallback = new GeodatabaseStatusCallback() {

                @Override
                public void statusUpdated(GeodatabaseStatusInfo status) {
                    final String progress = status.getStatus().toString();
                    //在UI线程更新下载状态
                    ((Activity)context).runOnUiThread(new Runnable(){
                        @Override
                        public void run() {
                            mProgressDialog.setMessage("数据同步中，请稍后……");
                        }
                    });
                }
            };

            // 执行同步
            gdbSyncTask.syncGeodatabase(syncParams, gdb, statusCallback, syncResponseCallback);

        } catch (Exception e) {
            e.printStackTrace();
        }
    }

    /**
     * 在UI线程中执行状态提示
     * @param msg
     */
    private void showMakeText(final String msg) {
        //在UI线程更新下载状态
        ((Activity)context).runOnUiThread(new Runnable(){
            @Override
            public void run() {
                Toast.makeText(context, msg, Toast.LENGTH_SHORT).show();
            }
        });
    }

}

源代码托管地址：http://git.oschina.net/gis-luq/RuntimeOfflineEdit

《ArcGIS Runtime SDK for Android开发笔记》——离在线一体化技术：离线矢量数据同步

1、前言

2、demo实现过程

2.1、Demo UI实现

2.3、实现离线地理数据库同步

基本思路：

3、数据同步结果

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