create Icon via Bitmap - Android Graphics

Android examples for Graphics:Bitmap Create

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  4. Bitmap Create

Description

create Icon via Bitmap

Demo Code


//package com.java2s;
import java.io.ByteArrayOutputStream;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import android.content.Context;
import android.graphics.Bitmap;
import android.graphics.Bitmap.CompressFormat;
import android.graphics.BitmapFactory;

public class Main {
    public static File createIcon(String path, Context context)
            throws IOException {

        Bitmap image = BitmapFactory.decodeFile(path);
        Bitmap resized;/*from   w  ww. ja va2 s .  c o m*/
        int width = image.getWidth();
        int height = image.getHeight();
        float scale;

        // magic happens here
        float scaleHeight = (float) height / (float) 100;
        float scaleWidth = (float) width / (float) 100;
        if (scaleWidth < scaleHeight)
            scale = scaleHeight;
        else
            scale = scaleWidth;

        // resize the image here
        resized = Bitmap.createScaledBitmap(image, (int) (width / scale),
                (int) (height / scale), true);

        // create a file to write bitmap data
        File file = new File(context.getCacheDir() + "/preview.jpg");
        file.createNewFile();

        // Convert bitmap to byte array
        ByteArrayOutputStream bos = new ByteArrayOutputStream();
        resized.compress(CompressFormat.JPEG, 100, bos);
        byte[] bitmapdata = bos.toByteArray();

        // write the bytes in file
        FileOutputStream fos = new FileOutputStream(file);
        fos.write(bitmapdata);
        fos.flush();
        fos.close();

        return file;
    }
}

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