create Billboard Texture Path

Description

Demo Code

/**//from  ww  w  .  ja  v a  2s.com
 * @copyright   Copyright (C) 2012 - 2013 Information Technology Institute ITI-CERTH. All rights reserved.
 * @license     GNU Affero General Public License version 3 or later; see LICENSE.txt
 * @author      Dimitrios Ververidis for the Multimedia Group (http://mklab.iti.gr). 
 */
//package com.java2s;
import java.io.FileOutputStream;
import android.content.Context;
import android.content.res.Resources;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Paint;
import android.graphics.Typeface;
import android.util.Log;

public class Main {
    /** Text size */
    public static int TEXT_SIZE = 20;
    /** billboard texture size: 256x128. To be sure use only powers of 2. Keep low to save memory*/
    public static int billboard_W = 256;
    public static int billboard_H = 128;
    /** Horizontal margin for text */
    public static int TEXT_MARGIN_HOR = 4;
    /** Icon width equals height */
    public static int icon_W = 56;
    /** Text size of distance textview */
    public static int TEXT_SIZE_DISTANCE = 16;
    /** Text Color  */
    public static int textColor = Color.BLACK;

    public static String createBillboardTexturePath(String billBoardTitle,
            int dist, Bitmap bmicon, Context ctx, Resources resources,
            int r_Backr_Drawable) {

        try {

            //-------- Distance string -----------
            String distSTR = "";
            if (dist < 1000)
                distSTR = Integer.toString((int) dist) + "m";
            else {
                int d = (int) (dist / 1000);
                distSTR = Integer.toString(d) + "km";
            }

            //-------------- ---------------------------

            final String texturepath = ctx.getCacheDir() + "/"
                    + billBoardTitle + ".png";
            Paint mPaint = new Paint();

            //reading billboard background
            Bitmap mBackgroundImage = BitmapFactory.decodeResource(
                    resources, r_Backr_Drawable);
            Bitmap billboard = mBackgroundImage.copy(
                    Bitmap.Config.ARGB_8888, true);
            Canvas c = new Canvas(billboard);

            //-------------- Title---------------------
            mPaint.setColor(textColor);
            mPaint.setTextSize(TEXT_SIZE);
            mPaint.setAntiAlias(true);
            mPaint.setDither(true);
            mPaint.setTypeface(Typeface.SANS_SERIF);
            mPaint.setTextAlign(Paint.Align.LEFT);
            int y = TEXT_SIZE; // start of text vertical

            int x = icon_W + 2 * TEXT_MARGIN_HOR; // start of text horizontal

            // Draw POI name
            if (billBoardTitle.length() > 0) {
                String titleSTR = billBoardTitle.trim();

                final int maxWidth = billboard_W - x - 3 * TEXT_MARGIN_HOR;
                //-----------------------------------

                int indexBreak = mPaint.breakText(titleSTR, true, maxWidth,
                        null);

                while (!(titleSTR.substring(indexBreak - 1, indexBreak)
                        .equals(" ")) && indexBreak > 0) {
                    indexBreak -= 1;
                }

                if (indexBreak <= 1) {
                    indexBreak = mPaint.breakText(titleSTR, true, maxWidth,
                            null);
                }

                //----------------------------------
                c.drawText(titleSTR.substring(0, indexBreak), x + 2
                        * TEXT_MARGIN_HOR, y, mPaint);

                // Draw second line if valid
                if (indexBreak < titleSTR.length()) {
                    titleSTR = titleSTR.substring(indexBreak);
                    y += TEXT_SIZE;
                    indexBreak = mPaint.breakText(titleSTR, true, maxWidth,
                            null);

                    if (indexBreak < titleSTR.length()) {
                        indexBreak = mPaint.breakText(titleSTR, true,
                                maxWidth - x, null);
                        c.drawText(titleSTR.substring(0, indexBreak)
                                + "...", x + 2 * TEXT_MARGIN_HOR, y, mPaint);
                    } else {
                        c.drawText(titleSTR.substring(0, indexBreak), x + 2
                                * TEXT_MARGIN_HOR, y, mPaint);
                    }
                }
            }

            //-------------- Distance -------------
            if (distSTR.length() > 0) {
                mPaint.setTextSize(TEXT_SIZE_DISTANCE);
                mPaint.setTextAlign(Paint.Align.CENTER);
                c.drawText(distSTR, billboard_W / 2, billboard_H - 40,
                        mPaint);
            }

            //-------icon -------
            c.drawBitmap(bmicon, 2 * TEXT_MARGIN_HOR, 2 * TEXT_MARGIN_HOR,
                    mPaint);

            // --- Save Bitmap to a file --------------
            try {
                FileOutputStream out = new FileOutputStream(texturepath);
                billboard.compress(Bitmap.CompressFormat.PNG, 90, out);

                Log.v("MetaioDebug", "Texture file is saved to "
                        + texturepath);
                //MetaioDebug.log("Texture file is saved to "+texturepath);
                return texturepath;
            } catch (Exception e) {
                Log.e("MetaioDebug", "Failed to save texture file");
                //MetaioDebug.log("Failed to save texture file");
                //e.printStackTrace();
            }

            billboard.recycle();
            billboard = null;

        } catch (Exception e) {
            Log.e("MetaioDebug",
                    "Error creating billboard texture: " + e.getMessage());
            //MetaioDebug.log("Error creating billboard texture: " + e.getMessage());
            //MetaioDebug.printStackTrace(Log.DEBUG, e);
            return null;
        }
        return null;
    }
}
create Billboard Texture Path - Android Graphics

Description

Demo Code

Related Tutorials
