android 调整位图自动高度

Question

我尝试调整位图的大小 gallery.I 写了一些代码，我只能调整位图的静态宽度并且 height.this 是来源

     public Bitmap getResizedBitmap(Bitmap bm, int newWidth) {

    float aspectRatio = (float)bm.getWidth() / (float) bm.getHeight();
    int height = Math.round(newWidth / aspectRatio); //based on width it gives height
    Matrix matrix = new Matrix();

    matrix.postScale(newWidth, height);

    Bitmap resizedBitmap = Bitmap.createBitmap(
            bm, 0, 0, newWidth, height, matrix, false);
    return resizedBitmap;
}

但我想调整位图的大小，例如宽度 800px 和自动 height.is 是否可以在 android 中解决这个问题？谢谢

Answer 1

float aspectRatio = (float)Image.getWidth() / (float) Image.getHeight();
int width = 200;    //your width
int height = Math.round(width / aspectRatio); //based on width it gives height

Answer 2

public Bitmap getResizedBitmap(Bitmap bm, int newWidth, int newHeight) {
int width = bm.getWidth();
int height = bm.getHeight();
Bitmap resizedBitmap;


try {
         resizedBitmap = Bitmap.createBitmap(bm, 0, 0, bm.getWidth(), bm.getHeight());
            }catch (Exception e){
                e.printStackTrace();
                boolean_image = true;
                return "";

            }

return resizedBitmap;
}

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