Returns a Bitmap from the given URI that may be scaled by an integer factor to reduce its size - Android Graphics

Android examples for Graphics:Bitmap Scale

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Description

Returns a Bitmap from the given URI that may be scaled by an integer factor to reduce its size

Demo Code


//package com.java2s;
import java.io.FileNotFoundException;

import android.content.Context;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;

import android.net.Uri;

public class Main {
    /** Returns a Bitmap from the given URI that may be scaled by an integer factor to reduce its size,
     * while staying as least as large as the width and height parameters.
     *//*from   w  w  w. ja  v a2s.  co m*/
    public static Bitmap scaledBitmapFromURIWithMinimumSize(
            Context context, Uri imageURI, int width, int height)
            throws FileNotFoundException {
        BitmapFactory.Options options = computeBitmapSizeFromURI(context,
                imageURI);
        options.inJustDecodeBounds = false;

        float wratio = 1.0f * options.outWidth / width;
        float hratio = 1.0f * options.outHeight / height;
        options.inSampleSize = (int) Math.min(wratio, hratio);

        return BitmapFactory.decodeStream(context.getContentResolver()
                .openInputStream(imageURI), null, options);
    }

    /** Returns a BitmapFactory.Options object containing the size of the image at the given URI,
     * without actually loading the image.
     */
    public static BitmapFactory.Options computeBitmapSizeFromURI(
            Context context, Uri imageURI) throws FileNotFoundException {
        BitmapFactory.Options options = new BitmapFactory.Options();
        options.inJustDecodeBounds = true;
        BitmapFactory.decodeStream(context.getContentResolver()
                .openInputStream(imageURI), null, options);
        return options;
    }
}

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