Main.java Source code

Introduction

Here is the source code for Main.java

Source

//package com.java2s;
//License from project: Open Source License 

import android.graphics.Bitmap;

import android.graphics.Canvas;

import android.graphics.Matrix;
import android.graphics.Paint;
import android.graphics.Rect;
import android.graphics.RectF;

public class Main {

    public static Bitmap zoomBitmap(Bitmap bitmap, float w, float h) {
        int width = bitmap.getWidth();
        int height = bitmap.getHeight();
        Matrix matrix = new Matrix();
        float scaleW = ((float) w / width);
        float scaleH = ((float) h / height);
        matrix.postScale(scaleW, scaleH);
        Bitmap newBmp = Bitmap.createBitmap(bitmap, 0, 0, width, height, matrix, true);

        return newBmp;
    }

    /**
     * Creates a mutable bitmap from subset of source bitmap, transformed by the optional matrix.
     */
    private static Bitmap createBitmap(Bitmap source, int x, int y, int width, int height, Matrix m) {
        // Re-implement Bitmap createBitmap() to always return a mutable bitmap.
        Canvas canvas = new Canvas();

        Bitmap bitmap;
        Paint paint;
        if ((m == null) || m.isIdentity()) {
            bitmap = Bitmap.createBitmap(width, height, source.getConfig());
            paint = null;
        } else {
            RectF rect = new RectF(0, 0, width, height);
            m.mapRect(rect);
            bitmap = Bitmap.createBitmap(Math.round(rect.width()), Math.round(rect.height()), source.getConfig());

            canvas.translate(-rect.left, -rect.top);
            canvas.concat(m);

            paint = new Paint(Paint.FILTER_BITMAP_FLAG);
            if (!m.rectStaysRect()) {
                paint.setAntiAlias(true);
            }
        }
        bitmap.setDensity(source.getDensity());
        canvas.setBitmap(bitmap);

        Rect srcBounds = new Rect(x, y, x + width, y + height);
        RectF dstBounds = new RectF(0, 0, width, height);
        canvas.drawBitmap(source, srcBounds, dstBounds, paint);
        return bitmap;
    }
}