Question

我需要在拍照后压缩图像尺寸。我想将尺寸减小到最大400K。

因此，拍摄照片后的平均图像尺寸约为3.3MB。我需要将它压缩到400K。

最佳选择是什么？

我试过了：

Bitmap original = BitmapFactory.decodeStream(getAssets().open("1024x768.jpg"));
ByteArrayOutputStream out = new ByteArrayOutputStream();
original.compress(Bitmap.CompressFormat.PNG, 100, out);
Bitmap decoded = BitmapFactory.decodeStream(new ByteArrayInputStream(out.toByteArray()));

。下面的代码允许我通过宽度和高度来减小尺寸，但不是存储空间。

Bitmap bitmap = Bitmap.createScaledBitmap(capturedImage, width, height, true);

我从https://stackoverflow.com/a/823966/556337找到了此示例，但他没有解释如何制作尺寸为XXX.MB的图像。有一种方法可以实现我的问题。？

// Decodes image and scales it to reduce memory consumption
private Bitmap decodeFile(File f) {
    try {
        // Decode image size
        BitmapFactory.Options o = new BitmapFactory.Options();
        o.inJustDecodeBounds = true;
        BitmapFactory.decodeStream(new FileInputStream(f), null, o);

        // The new size we want to scale to
        final int REQUIRED_SIZE=70;

        // Find the correct scale value. It should be the power of 2.
        int scale = 1;
        while(o.outWidth / scale / 2 >= REQUIRED_SIZE && 
              o.outHeight / scale / 2 >= REQUIRED_SIZE) {
            scale *= 2;
        }

        // Decode with inSampleSize
        BitmapFactory.Options o2 = new BitmapFactory.Options();
        o2.inSampleSize = scale;
        return BitmapFactory.decodeStream(new FileInputStream(f), null, o2);
    } catch (FileNotFoundException e) {}
    return null;
}

android如何在上传到服务器之前将图像存储大小更改为400K

0 个答案: