Main.java Source code

Introduction

Here is the source code for Main.java

Source

//package com.java2s;
//License from project: Apache License 

import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.InputStream;

import android.util.Log;

import android.annotation.SuppressLint;
import android.app.Activity;

import android.graphics.Bitmap;
import android.graphics.BitmapFactory;

import android.net.Uri;

public class Main {
    private static final String TAG = "vlCameraBitmapUtils";

    @SuppressLint("NewApi")
    public static Bitmap decodeSampledBitmap(Uri uri, int reqWidth, int reqHeight, Activity act) {

        // First decode with inJustDecodeBounds=true to check dimensions
        InputStream is;
        try {
            is = act.getApplicationContext().getContentResolver().openInputStream(uri);
            final BitmapFactory.Options options = new BitmapFactory.Options();
            options.inJustDecodeBounds = true;
            BitmapFactory.decodeStream(is, null, options);
            is.close(); //consider use is.mark and is.reset instead [TODO]

            // Calculate inSampleSize
            options.inSampleSize = calculateInSampleSize(options, reqWidth, reqHeight);

            // Decode bitmap with inSampleSize set
            //open input stream again
            is = act.getApplicationContext().getContentResolver().openInputStream(uri);
            options.inJustDecodeBounds = false;
            Bitmap ret = BitmapFactory.decodeStream(is, null, options);
            is.close();
            return ret;
        } catch (FileNotFoundException e) {
            Log.v(TAG, "File not found:" + uri.toString());
            e.printStackTrace();
        } catch (IOException e) {
            Log.v(TAG, "I/O exception with file:" + uri.toString());
            e.printStackTrace();
        }
        return null;
    }

    /** bitmap downsample utils **/
    public static int calculateInSampleSize(BitmapFactory.Options options, int reqWidth, int reqHeight) {
        // Raw height and width of image
        final int height = options.outHeight;
        final int width = options.outWidth;
        int inSampleSize = 1;

        if (height > reqHeight || width > reqWidth) {
            final int heightRatio = Math.round((float) height / (float) reqHeight);
            final int widthRatio = Math.round((float) width / (float) reqWidth);

            inSampleSize = heightRatio < widthRatio ? heightRatio : widthRatio;
        }

        return inSampleSize;
    }
}