Android Open Source - AndroidImageUploader Image Utils

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License

The source code is released under:

MIT License

Java Source Code

package com.examples.imageupload;
//from ww w .j av  a 2  s  . com
import android.content.ContentResolver;
import android.content.Context;
import android.database.Cursor;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.net.Uri;
import android.os.Environment;
import android.provider.MediaStore;
import android.util.Log;

import java.io.File;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.InputStream;
import java.text.SimpleDateFormat;
import java.util.Date;

/**
 * Created by kcourville on 7/10/2014.
 */
public class ImageUtils {
    public static final int MEDIA_TYPE_IMAGE = 1;
    public static final int MEDIA_TYPE_VIDEO = 2;
    private static final String TAG = "ImageUtils.java";

    public static String getMediaFilename(int type) {
        String timeStamp = new SimpleDateFormat("yyyyMMdd_HHmmss").format(new Date());
        if (type == MEDIA_TYPE_IMAGE) {
            return "IMG_" + timeStamp + ".jpg";
        } else if (type == MEDIA_TYPE_VIDEO) {
            return "VID_" + timeStamp + ".mp4";
        } else {
            return null;
        }
    }

    public static Uri getOutputMediaFileUri(int type) {
        return Uri.fromFile(getOutputMediaFile(type));
    }

    public static File getOutputMediaFile(int type) {
        // To be safe, you should check that the SDCard is mounted
        // using Environment.getExternalStorageState() before doing this.

        File mediaStorageDir = new File(Environment.getExternalStoragePublicDirectory(
                Environment.DIRECTORY_PICTURES), "SendImage");
        // This location works best if you want the created images to be shared
        // between applications and persist after your app has been uninstalled.

        // Create the storage directory if it does not exist
        if (!mediaStorageDir.exists()) {
            if (!mediaStorageDir.mkdirs()) {
                Log.d(TAG, "failed to create directory");
                return null;
            }
        }

        // Create a media file name
        return new File(
                String.format("%s%s%s", mediaStorageDir.getPath(), File.separator, ImageUtils.getMediaFilename(type))
        );
    }

    public static long getImageId(ContentResolver resolver, Uri imageUri) {
        long result = -1;
        String[] projection = {MediaStore.Images.Media._ID};
        Cursor cursor = resolver.query(imageUri, projection, null, null, null);
        if (cursor.moveToFirst()) {
            int column_index = cursor.getColumnIndexOrThrow(MediaStore.Images.Media._ID);
            result = cursor.getLong(column_index);
        }
        cursor.close();

        return result;
    }

    public static Bitmap getThumbnailFromUri(ContentResolver resolver, Uri uri) throws IOException {
        Bitmap result = null;
        long imageId = getImageId(resolver, uri);

        if (imageId >= 0) {
            result = MediaStore.Images.Thumbnails.getThumbnail(
                    resolver, imageId,
                    MediaStore.Images.Thumbnails.MINI_KIND,
                    null
            );
        }
        return result;
    }

    public static Bitmap decodeUri(Context context, Uri uri, final int requiredSize)
            throws FileNotFoundException {
        BitmapFactory.Options o = new BitmapFactory.Options();
        o.inJustDecodeBounds = true;
        BitmapFactory.decodeStream(context.getContentResolver().openInputStream(uri), null, o);

        int width_tmp = o.outWidth
                , height_tmp = o.outHeight;
        int scale = 1;

        while(true) {
            if(width_tmp / 2 < requiredSize || height_tmp / 2 < requiredSize)
                break;
            width_tmp /= 2;
            height_tmp /= 2;
            scale *= 2;
        }

        BitmapFactory.Options o2 = new BitmapFactory.Options();
        o2.inSampleSize = scale;
        return BitmapFactory.decodeStream(context.getContentResolver().openInputStream(uri), null, o2);
    }
}

Java Source Code List

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