Main.java Source code

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Here is the source code for Main.java

Source

//package com.java2s;

import android.content.Context;

import android.content.res.Resources;
import android.graphics.Bitmap;

import android.graphics.Canvas;

import android.graphics.drawable.BitmapDrawable;
import android.graphics.drawable.Drawable;

public class Main {
    /** Default canvas used to interact with bitmaps */
    private static Canvas canvas = new Canvas();

    /**
     * Resize a {@link Drawable} to the given size.<br />
     * Metrics and density are given by the {@link Resources} bount to this instance.
     * @param ctx Context.
     * @param id The desired resource identifier, as generated by the aapt tool. This integer encodes the package, type, and resource entry. The value 0 is an invalid identifier.
     * @param widthId Reference to the dimension containing the desired width.
     * @param heightId Reference to the dimension containing the desired height.
     * @return A scaled {@link Drawable}.
     */
    public static Drawable resizeDrawable(Context ctx, int id, int widthId, int heightId) {
        return resizeDrawable(ctx, ctx.getResources().getDrawable(id), widthId, heightId);
    }

    /**
     * Resize a {@link Drawable} to the given size.<br />
     * Metrics and density are given by the {@link Resources} bount to this instance.
     * @param ctx Context.
     * @param drawable {@link Drawable} to resize.
     * @param widthId Reference to the dimension containing the desired width.
     * @param heightId Reference to the dimension containing the desired height.
     * @return A scaled {@link Drawable}.
     */
    public static Drawable resizeDrawable(Context ctx, Drawable drawable, int widthId, int heightId) {
        Resources res = ctx.getResources();
        //float density = res.getDisplayMetrics().density;

        //Get a bitmap from the drawable
        Bitmap bmp = drawableToBitmap(drawable);

        //Create a scaled bitmap
        //      bmp = Bitmap.createScaledBitmap(
        //            bmp,
        //            (int)(width * density),
        //            (int)(height * density),
        //            true);
        bmp = Bitmap.createScaledBitmap(bmp, res.getDimensionPixelSize(widthId),
                res.getDimensionPixelSize(heightId), true);

        //Convert bitmap to drawable
        return new BitmapDrawable(res, bmp);
    }

    /**
     * Return the {@link Bitmap} representing the {@link Drawable}.
     * @param drawable Object to convert to {@link Bitmap}.
     * @return {@link Bitmap} representing the {@link Drawable}.
     */
    private static Bitmap drawableToBitmap(Drawable drawable) {
        Bitmap retVal;
        if (drawable instanceof BitmapDrawable) {
            //Easy
            retVal = ((BitmapDrawable) drawable).getBitmap();
        } else {
            drawable.setBounds(0, 0, drawable.getIntrinsicWidth(), drawable.getIntrinsicHeight());
            retVal = Bitmap.createBitmap(drawable.getIntrinsicWidth(), drawable.getIntrinsicHeight(),
                    Bitmap.Config.ARGB_8888);

            synchronized (canvas) {
                canvas.setBitmap(retVal);
                drawable.draw(canvas);
            }
        }
        return retVal;
    }
}