/* * Copyright 2017 wshunli * * 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.wshunli.map.arcgis.android.moremap; import android.util.Log; import com.esri.android.map.TiledServiceLayer; import com.esri.core.geometry.Envelope; import com.esri.core.geometry.SpatialReference; import java.io.ByteArrayOutputStream; import java.io.File; import java.io.FileInputStream; import java.io.FileOutputStream; import java.io.IOException; import java.util.Map; import java.util.concurrent.RejectedExecutionException; public class MoreMapLayer extends TiledServiceLayer { private MoreMapLayerInfo layerInfo; private String cachePath; public MoreMapLayer(int layerType) { super(true); this.layerInfo = LayerInfoFactory.getLayerInfo(layerType); this.cachePath = null; this.init(); } public MoreMapLayer(int layerType, String cachePath) { super(true); this.layerInfo = LayerInfoFactory.getLayerInfo(layerType); this.cachePath = cachePath + "/" + layerInfo.getCachePathName() + "/"; this.init(); } private void init() { try { getServiceExecutor().submit(new Runnable() { public void run() { MoreMapLayer.this.initLayer(); } }); } catch (RejectedExecutionException rejectedexecutionexception) { Log.e("ChinaMapLayer", "initialization of the layer failed.", rejectedexecutionexception); } } protected byte[] getTile(int level, int col, int row) throws Exception { if (level > layerInfo.getMaxZoomLevel() || level < layerInfo.getMinZoomLevel()) return new byte[0]; byte[] bytes = null; if (cachePath != null) bytes = getOfflineCacheFile(cachePath, level, col, row); if (bytes == null) { String layerUrl = LayerInfoFactory.getLayerUrl(layerInfo, level, col, row); Map<String, String> map = null; bytes = com.esri.core.internal.io.handler.a.a(layerUrl, map); if (cachePath != null) AddOfflineCacheFile(cachePath, level, col, row, bytes); } return bytes; } protected void initLayer() { if (getID() == 0L) { nativeHandle = create(); changeStatus(com.esri.android.map.event.OnStatusChangedListener.STATUS .fromInt(-1000)); } else { this.setDefaultSpatialReference(SpatialReference.create(layerInfo .getSrid())); this.setFullExtent(new Envelope(layerInfo.getxMin(), layerInfo .getyMin(), layerInfo.getxMax(), layerInfo.getyMax())); this.setTileInfo(new TileInfo(layerInfo.getOrigin(), layerInfo .getScales(), layerInfo.getResolutions(), layerInfo .getScales().length, layerInfo.getDpi(), layerInfo .getTileWidth(), layerInfo.getTileHeight())); super.initLayer(); } } // 将图片保存到本地 目录结构可以随便定义 只要你找得到对应的图片 private byte[] AddOfflineCacheFile(String cachePath, int level, int col, int row, byte[] bytes) { File file = new File(cachePath); if (!file.exists()) { file.mkdirs(); } File levelfile = new File(cachePath + "/" + level); if (!levelfile.exists()) { levelfile.mkdirs(); } File rowfile = new File(cachePath + "/" + level + "/" + col + "x" + row + ".cmap"); if (!rowfile.exists()) { try { FileOutputStream out = new FileOutputStream(rowfile); out.write(bytes); } catch (Exception e) { // TODO Auto-generated catch block e.printStackTrace(); } } return bytes; } // 从本地获取图片 private byte[] getOfflineCacheFile(String cachePath, int level, int col, int row) { byte[] bytes = null; File rowfile = new File(cachePath + "/" + level + "/" + col + "x" + row + ".cmap"); if (rowfile.exists()) { try { bytes = CopySdcardbytes(rowfile); } catch (IOException e) { // TODO Auto-generated catch block e.printStackTrace(); } } else { bytes = null; } return bytes; } // 读取本地图片流 private byte[] CopySdcardbytes(File file) throws IOException { FileInputStream in = new FileInputStream(file); ByteArrayOutputStream out = new ByteArrayOutputStream(1024); byte[] temp = new byte[1024]; int size = 0; while ((size = in.read(temp)) != -1) { out.write(temp, 0, size); } in.close(); byte[] bytes = out.toByteArray(); return bytes; } }