Open mobile map package

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/*
 * Copyright 2020 Esri
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *    http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 *
 */

package com.esri.arcgisruntime.sample.openmobilemappackage

import android.os.Bundle
import android.util.Log
import android.widget.Toast
import androidx.appcompat.app.AppCompatActivity
import com.esri.arcgisruntime.loadable.LoadStatus
import com.esri.arcgisruntime.mapping.MobileMapPackage
import com.esri.arcgisruntime.mapping.view.MapView
import com.esri.arcgisruntime.sample.openmobilemappackage.databinding.ActivityMainBinding


class MainActivity : AppCompatActivity() {

    private val TAG: String = MainActivity::class.java.simpleName

    private lateinit var mapPackage: MobileMapPackage

    private val activityMainBinding by lazy {
        ActivityMainBinding.inflate(layoutInflater)
    }

    private val mapView: MapView by lazy {
        activityMainBinding.mapView
    }

    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContentView(activityMainBinding.root)

        // access the mobile map package from the filesystem and load it into a MapView
        loadMobileMapPackage(getExternalFilesDir(null)?.path + getString(R.string.yellowstone_mmpk))
    }

    /**
     * Load a mobile map package into a MapView.
     *
     * @param mmpkFile Full path to mmpk file
     */
    private fun loadMobileMapPackage(mmpkFile: String) {
        // create the mobile map package
        mapPackage = MobileMapPackage(mmpkFile).also {
            // load the mobile map package asynchronously
            it.loadAsync()
        }

        // add done listener which will invoke when mobile map package has loaded
        mapPackage.addDoneLoadingListener {
            // check load status and that the mobile map package has maps
            if (mapPackage.loadStatus === LoadStatus.LOADED && mapPackage.maps.isNotEmpty()) {
                // add the map from the mobile map package to the MapView
                mapView.map = mapPackage.maps[0]
            } else {
                // log an issue if the mobile map package fails to load
                logError(mapPackage.loadError.message)
            }
        }
    }

    override fun onResume() {
        super.onResume()
        mapView.resume()
    }

    override fun onPause() {
        mapView.pause()
        super.onPause()
    }

    override fun onDestroy() {
        mapView.dispose()
        super.onDestroy()
    }

    /**
     * Log an error to logcat and to the screen via Toast.
     * @param message the text to log.
     */
    private fun logError(message: String?) {
        message?.let {
            Log.e(
                TAG,
                message
            )
            Toast.makeText(this, message, Toast.LENGTH_LONG).show()
        }
    }
}