调整图像大小android

// 加载原始图像
Bitmap originalBitmap = BitmapFactory.decodeResource(getResources(), R.drawable.original_image);

// 定义目标尺寸
int targetWidth = 500;
int targetHeight = 500;

// 计算缩放比例
float scaleWidth = ((float) targetWidth) / originalBitmap.getWidth();
float scaleHeight = ((float) targetHeight) / originalBitmap.getHeight();

// 创建调整后的图像
Matrix matrix = new Matrix();
matrix.postScale(scaleWidth, scaleHeight);
Bitmap resizedBitmap = Bitmap.createBitmap(originalBitmap, 0, 0, originalBitmap.getWidth(), originalBitmap.getHeight(), matrix, false);

// 使用调整后的图像
imageView.setImageBitmap(resizedBitmap);