Android Open Source - smartnavi Bonus Pack Helper

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Back to project page smartnavi.

License

The source code is released under:

Apache License

Java Source Code

package org.osmdroid.bonuspack.utils;
//from   www.  j  ava2 s.  co  m
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.os.Build;

import org.apache.http.NameValuePair;
import org.osmdroid.util.BoundingBoxE6;

import java.io.BufferedReader;
import java.io.FilterInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.net.URL;
import java.util.List;

/**
 * Useful functions and common constants.
 *
 * @author M.Kergall
 */
public class BonusPackHelper {

    /**
     * Log tag.
     */
    public static final String LOG_TAG = "BONUSPACK";

    /**
     * resource id value meaning "undefined resource id"
     */
    public static final int UNDEFINED_RES_ID = 0;

    /**
     * User agent sent to services by default
     */
    public static final String DEFAULT_USER_AGENT = "OsmBonusPack/1";

    /**
     * @return true if the device is the emulator, false if actual device.
     */
    public static boolean isEmulator() {
        //return Build.MANUFACTURER.equals("unknown");
        return ("google_sdk".equals(Build.PRODUCT) || "sdk".equals(Build.PRODUCT));
    }

    public static BoundingBoxE6 cloneBoundingBoxE6(BoundingBoxE6 bb) {
        return new BoundingBoxE6(
                bb.getLatNorthE6(),
                bb.getLonEastE6(),
                bb.getLatSouthE6(),
                bb.getLonWestE6());
    }

    /**
     * @return the BoundingBox enclosing bb1 and bb2 BoundingBoxes
     */
    public static BoundingBoxE6 concatBoundingBoxE6(BoundingBoxE6 bb1, BoundingBoxE6 bb2) {
        return new BoundingBoxE6(
                Math.max(bb1.getLatNorthE6(), bb2.getLatNorthE6()),
                Math.max(bb1.getLonEastE6(), bb2.getLonEastE6()),
                Math.min(bb1.getLatSouthE6(), bb2.getLatSouthE6()),
                Math.min(bb1.getLonWestE6(), bb2.getLonWestE6()));
    }

    /**
     * @return the whole content of the http request, as a string
     */
    private static String readStream(HttpConnection connection) {
        String result = connection.getContentAsString();
        return result;
    }

    /**
     * sends an http request, and returns the whole content result in a String.
     *
     * @param url
     * @return the whole content, or null if any issue.
     */
    public static String requestStringFromUrl(String url) {
        HttpConnection connection = new HttpConnection();
        connection.doGet(url);
        String result = readStream(connection);
        connection.close();
        return result;
    }

    /**
     * requestStringFromPost: do a post request to a url with name-value pairs,
     * and returns the whole content result in a String.
     *
     * @param url
     * @param nameValuePairs
     * @return the content, or null if any issue.
     */
    public static String requestStringFromPost(String url, List<NameValuePair> nameValuePairs) {
        HttpConnection connection = new HttpConnection();
        connection.doPost(url, nameValuePairs);
        String result = readStream(connection);
        connection.close();
        return result;
    }

    public static String convertStreamToString(InputStream is) throws Exception {
        BufferedReader reader = new BufferedReader(new InputStreamReader(is));
        StringBuilder sb = new StringBuilder();
        String line = null;
        while ((line = reader.readLine()) != null) {
            sb.append(line).append("\n");
        }
        reader.close();
        return sb.toString();
    }

    /**
     * Loads a bitmap from a url.
     *
     * @param url
     * @return the bitmap, or null if any issue.
     */
    public static Bitmap loadBitmap(String url) {
        Bitmap bitmap = null;
        try {
            InputStream is = (InputStream) new URL(url).getContent();
            if (is == null)
                return null;
            bitmap = BitmapFactory.decodeStream(new FlushedInputStream(is));
            //Alternative providing better handling on loading errors?
            /*
            Drawable d = Drawable.createFromStream(new FlushedInputStream(is), null);
      if (is != null)
        is.close();
      if (d != null)
        bitmap = ((BitmapDrawable)d).getBitmap();
      */
        } catch (Exception e) {
            e.printStackTrace();
            return null;
        }
        return bitmap;
    }

    /**
     * Workaround on Android issue
     * see http://stackoverflow.com/questions/4601352/createfromstream-in-android-returning-null-for-certain-url
     */
    static class FlushedInputStream extends FilterInputStream {
        public FlushedInputStream(InputStream inputStream) {
            super(inputStream);
        }

        @Override
        public long skip(long n) throws IOException {
            long totalBytesSkipped = 0L;
            while (totalBytesSkipped < n) {
                long bytesSkipped = in.skip(n - totalBytesSkipped);
                if (bytesSkipped == 0L) {
                    int byteValue = read();
                    if (byteValue < 0) {
                        break;  // we reached EOF
                    } else {
                        bytesSkipped = 1; // we read one byte
                    }
                }
                totalBytesSkipped += bytesSkipped;
            }
            return totalBytesSkipped;
        }
    }
}

Java Source Code List

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