find Bitmap Scale Factor - Android Graphics

Android examples for Graphics:Bitmap Scale

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Description

find Bitmap Scale Factor

Demo Code

/*//from w  w  w  .  jav a 2 s.  c o m
 * Copyright (C) 2014 The Android Open Source Project
 *
 * 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.
 */
//package com.java2s;

import android.graphics.BitmapFactory;

import java.io.InputStream;

public class Main {
    public static int findScaleFactor(int targetW, int targetH,
            InputStream is) {
        // Get the dimensions of the bitmap
        BitmapFactory.Options bmOptions = new BitmapFactory.Options();
        bmOptions.inJustDecodeBounds = true;
        BitmapFactory.decodeStream(is, null, bmOptions);
        int actualW = bmOptions.outWidth;
        int actualH = bmOptions.outHeight;

        // Determine how much to scale down the image
        return Math.min(actualW / targetW, actualH / targetH);
    }
}

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