63 lines
1.8 KiB
Java
63 lines
1.8 KiB
Java
package com.cradle.iitc_mobile.async;
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import android.os.AsyncTask;
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import android.util.Log;
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import java.io.File;
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import java.io.FileOutputStream;
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import java.io.IOException;
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import java.io.InputStream;
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import java.net.URL;
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import java.net.URLConnection;
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public class DownloadTile extends AsyncTask<String, Void, Boolean> {
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private String mFilePath;
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private String mFileName;
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public DownloadTile(String path, String fileName) {
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mFilePath = path;
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mFileName = fileName;
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}
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@Override
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protected Boolean doInBackground(String... urls) {
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URL tileUrl = null;
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URLConnection conn = null;
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try {
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tileUrl = new URL(urls[0]);
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conn = tileUrl.openConnection();
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File file = new File(mFilePath, mFileName);
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// update tile if needed, else return
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if (conn.getLastModified() < file.lastModified()) return true;
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InputStream is = null;
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is = conn.getInputStream();
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Log.d("iitcm", "writing to file: " + file.toString());
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File output = writeTileToFile(is, file, mFilePath);
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} catch (IOException e) {
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e.printStackTrace();
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return false;
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} catch (Exception e) {
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e.printStackTrace();
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return false;
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}
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return true;
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}
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private File writeTileToFile(InputStream inStream, File file, String path) throws Exception {
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File filePath = new File(path);
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filePath.mkdirs();
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FileOutputStream outStream = new FileOutputStream(file);
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int bufferSize = 1024;
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byte[] buffer = new byte[bufferSize];
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int len = 0;
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while ((len = inStream.read(buffer)) != -1) {
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outStream.write(buffer, 0, len);
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}
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if(outStream!=null) outStream.close();
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return file;
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}
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}
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