Main.java Source code

Introduction

Here is the source code for Main.java

Source

//package com.java2s;
//License from project: Apache License 

import android.graphics.Bitmap;

import android.graphics.Canvas;
import android.graphics.Matrix;
import android.graphics.PixelFormat;
import android.graphics.drawable.Drawable;

public class Main {

    public static Bitmap bitmapZoomByHeight(Bitmap srcBitmap, float newHeight) {
        int srcWidth = srcBitmap.getWidth();
        int srcHeight = srcBitmap.getHeight();

        float scaleHeight = ((float) newHeight) / srcHeight;
        float scaleWidth = scaleHeight;

        return bitmapZoomByScale(srcBitmap, scaleWidth, scaleHeight);

    }

    public static Bitmap bitmapZoomByHeight(Drawable drawable, float newHeight) {
        Bitmap srcBitmap = drawableToBitmap(drawable);
        int srcWidth = srcBitmap.getWidth();
        int srcHeight = srcBitmap.getHeight();

        float scaleHeight = ((float) newHeight) / srcHeight;
        float scaleWidth = scaleHeight;

        return bitmapZoomByScale(srcBitmap, scaleWidth, scaleHeight);

    }

    public static Bitmap bitmapZoomByScale(Bitmap srcBitmap, float scaleWidth, float scaleHeight) {
        int srcWidth = srcBitmap.getWidth();
        int srcHeight = srcBitmap.getHeight();
        Matrix matrix = new Matrix();

        matrix.postScale(scaleWidth, scaleHeight);
        Bitmap resizedBitmap = Bitmap.createBitmap(srcBitmap, 0, 0, srcWidth, srcHeight, matrix, true);
        if (resizedBitmap != null) {
            srcBitmap = null;
            return resizedBitmap;
        } else {
            return srcBitmap;
        }
    }

    public static Bitmap drawableToBitmap(Drawable drawable) {
        int width = drawable.getIntrinsicWidth();
        int height = drawable.getIntrinsicHeight();
        Bitmap bitmap = Bitmap.createBitmap(width, height,
                drawable.getOpacity() != PixelFormat.OPAQUE ? Bitmap.Config.ARGB_8888 : Bitmap.Config.RGB_565);
        Canvas canvas = new Canvas(bitmap);
        drawable.setBounds(0, 0, width, height);
        drawable.draw(canvas);
        return bitmap;

    }
}