Main.java Source code

Introduction

Here is the source code for Main.java

Source

//package com.java2s;
/*
 * Copyright (c) 2017 by Tran Le Duy
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

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

import android.net.Uri;
import android.support.annotation.Nullable;

import java.io.FileNotFoundException;

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.
     */
    @Nullable
    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);
        //        return BitmapFactory.decodeStream(context.getContentResolver().openInputStream(imageURI));
    }

    /**
     * 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;
        Bitmap bitmap = BitmapFactory.decodeStream(context.getContentResolver().openInputStream(imageURI), null,
                options);
        if (bitmap != null) {
            bitmap.recycle();
        }
        return options;
    }
}