resize Bitmap Image - Android Graphics

Android examples for Graphics:Bitmap Resize

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  4. Bitmap Resize

Description

resize Bitmap Image

Demo Code


//package com.java2s;
import android.content.Context;
import android.database.Cursor;
import android.graphics.Bitmap;
import android.net.Uri;
import android.provider.MediaStore;
import java.io.ByteArrayOutputStream;
import java.io.File;
import java.io.FileOutputStream;

public class Main {
    public static void resizeImage(Context context, Uri imageUri) {
        try {/*from  w w w.j av a2 s.  c  o m*/

            Bitmap bitmap = MediaStore.Images.Media.getBitmap(
                    context.getContentResolver(), imageUri);

            final int maxSize = 768;
            int outWidth;
            int outHeight;
            int inWidth = bitmap.getWidth();
            int inHeight = bitmap.getHeight();
            if (inWidth > inHeight) {
                outWidth = maxSize;
                outHeight = (inHeight * maxSize) / inWidth;
            } else {
                outHeight = maxSize;
                outWidth = (inWidth * maxSize) / inHeight;
            }

            bitmap = Bitmap.createScaledBitmap(bitmap, outWidth, outHeight,
                    false);

            ByteArrayOutputStream bytes = new ByteArrayOutputStream();
            bitmap.compress(Bitmap.CompressFormat.JPEG, 40, bytes);

            File f = new File(getRealPathFromURI(context, imageUri));
            f.createNewFile();
            FileOutputStream fo = new FileOutputStream(f);
            fo.write(bytes.toByteArray());
            fo.close();
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

    private static String getRealPathFromURI(Context context, Uri uri) {

        String url = "";
        try {
            String[] projection = { MediaStore.Images.Media.DATA };

            Cursor cursor = context.getContentResolver().query(uri,
                    projection, null, null, null);

            int column_index = cursor
                    .getColumnIndexOrThrow(MediaStore.Images.Media.DATA);

            cursor.moveToFirst();
            url = cursor.getString(column_index);
            cursor.close();
        } catch (Exception e) {
            e.printStackTrace();
        }

        return url;
    }
}

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