A copy of the Android internals Store Thumbnail method - Android Media

Android examples for Media:Video

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Description

A copy of the Android internals Store Thumbnail method

Demo Code


//package com.java2s;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.OutputStream;
import android.content.ContentResolver;

import android.content.ContentValues;
import android.graphics.Bitmap;
import android.graphics.Matrix;
import android.net.Uri;

import android.provider.MediaStore.Images;

public class Main {
    /**//from   w  w w .  j  a v a2 s.co m
     * A copy of the Android internals StoreThumbnail method, it used with the insertImage to
     * populate the android.provider.MediaStore.Images.Media#insertImage with all the correct
     * meta data. The StoreThumbnail method is private so it must be duplicated here.
     * @see android.provider.MediaStore.Images.Media (StoreThumbnail private method)
     */
    private static final Bitmap storeThumbnail(ContentResolver cr,
            Bitmap source, long id, float width, float height, int kind) {

        // create the matrix to scale it
        Matrix matrix = new Matrix();

        float scaleX = width / source.getWidth();
        float scaleY = height / source.getHeight();

        matrix.setScale(scaleX, scaleY);

        Bitmap thumb = Bitmap.createBitmap(source, 0, 0, source.getWidth(),
                source.getHeight(), matrix, true);

        ContentValues values = new ContentValues(4);
        values.put(Images.Thumbnails.KIND, kind);
        values.put(Images.Thumbnails.IMAGE_ID, (int) id);
        values.put(Images.Thumbnails.HEIGHT, thumb.getHeight());
        values.put(Images.Thumbnails.WIDTH, thumb.getWidth());

        Uri url = cr.insert(Images.Thumbnails.EXTERNAL_CONTENT_URI, values);

        try {
            OutputStream thumbOut = cr.openOutputStream(url);
            thumb.compress(Bitmap.CompressFormat.JPEG, 100, thumbOut);
            thumbOut.close();
            return thumb;
        } catch (FileNotFoundException ex) {
            return null;
        } catch (IOException ex) {
            return null;
        }
    }
}

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